/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/reducercommutativity/rangesum60.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 22:11:27,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 22:11:27,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 22:11:27,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 22:11:27,991 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 [2022-01-30 22:11:28,015 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 22:11:28,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 22:11:28,016 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 22:11:28,016 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 22:11:28,016 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 22:11:28,016 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 22:11:28,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 22:11:28,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 22:11:28,017 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 22:11:28,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 22:11:28,018 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 22:11:28,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 22:11:28,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 22:11:28,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 22:11:28,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 22:11:28,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 22:11:28,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 22:11:28,018 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 22:11:28,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 22:11:28,018 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 22:11:28,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 22:11:28,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 22:11:28,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 22:11:28,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 22:11:28,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:11:28,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 22:11:28,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 22:11:28,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 22:11:28,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 22:11:28,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 22:11:28,020 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 22:11:28,020 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 22:11:28,020 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 22:11:28,020 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 22:11:28,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 22:11:28,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 22:11:28,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 22:11:28,215 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 22:11:28,216 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 22:11:28,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum60.i [2022-01-30 22:11:28,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee7a85c6b/ee04b1609ff743cfa35df04f2468fc85/FLAG4abca0576 [2022-01-30 22:11:28,601 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 22:11:28,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum60.i [2022-01-30 22:11:28,609 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee7a85c6b/ee04b1609ff743cfa35df04f2468fc85/FLAG4abca0576 [2022-01-30 22:11:28,621 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee7a85c6b/ee04b1609ff743cfa35df04f2468fc85 [2022-01-30 22:11:28,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 22:11:28,625 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 22:11:28,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 22:11:28,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 22:11:28,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 22:11:28,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:11:28" (1/1) ... [2022-01-30 22:11:28,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ff8d631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:11:28, skipping insertion in model container [2022-01-30 22:11:28,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:11:28" (1/1) ... [2022-01-30 22:11:28,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 22:11:28,647 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 22:11:28,822 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum60.i[1465,1478] [2022-01-30 22:11:28,827 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:11:28,833 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 22:11:28,860 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum60.i[1465,1478] [2022-01-30 22:11:28,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:11:28,870 INFO L208 MainTranslator]: Completed translation [2022-01-30 22:11:28,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:11:28 WrapperNode [2022-01-30 22:11:28,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 22:11:28,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 22:11:28,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 22:11:28,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 22:11:28,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:11:28" (1/1) ... [2022-01-30 22:11:28,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:11:28" (1/1) ... [2022-01-30 22:11:28,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:11:28" (1/1) ... [2022-01-30 22:11:28,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:11:28" (1/1) ... [2022-01-30 22:11:28,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:11:28" (1/1) ... [2022-01-30 22:11:28,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:11:28" (1/1) ... [2022-01-30 22:11:28,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:11:28" (1/1) ... [2022-01-30 22:11:28,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 22:11:28,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 22:11:28,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 22:11:28,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 22:11:28,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:11:28" (1/1) ... [2022-01-30 22:11:28,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:11:28,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:28,921 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) [2022-01-30 22:11:28,926 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 [2022-01-30 22:11:28,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 22:11:28,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 22:11:28,945 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 22:11:28,945 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2022-01-30 22:11:28,945 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2022-01-30 22:11:28,946 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 22:11:28,946 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 22:11:28,946 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 22:11:28,946 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-30 22:11:28,946 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-30 22:11:28,946 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 22:11:28,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 22:11:28,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 22:11:28,947 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2022-01-30 22:11:28,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 22:11:28,947 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2022-01-30 22:11:28,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 22:11:28,947 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 22:11:28,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 22:11:28,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 22:11:28,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 22:11:28,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 22:11:28,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 22:11:28,997 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 22:11:28,999 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 22:11:29,131 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 22:11:29,135 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 22:11:29,135 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-30 22:11:29,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:11:29 BoogieIcfgContainer [2022-01-30 22:11:29,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 22:11:29,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 22:11:29,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 22:11:29,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 22:11:29,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 10:11:28" (1/3) ... [2022-01-30 22:11:29,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f3e4a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:11:29, skipping insertion in model container [2022-01-30 22:11:29,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:11:28" (2/3) ... [2022-01-30 22:11:29,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f3e4a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:11:29, skipping insertion in model container [2022-01-30 22:11:29,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:11:29" (3/3) ... [2022-01-30 22:11:29,141 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum60.i [2022-01-30 22:11:29,145 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 22:11:29,145 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 22:11:29,180 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 22:11:29,185 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-30 22:11:29,185 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 22:11:29,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 25 states have (on average 1.4) internal successors, (35), 26 states have internal predecessors, (35), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-30 22:11:29,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-30 22:11:29,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:29,201 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:29,202 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:29,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:29,208 INFO L85 PathProgramCache]: Analyzing trace with hash -310144342, now seen corresponding path program 1 times [2022-01-30 22:11:29,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:29,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177606562] [2022-01-30 22:11:29,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:29,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:29,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:11:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:29,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-30 22:11:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:29,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-30 22:11:29,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:29,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177606562] [2022-01-30 22:11:29,384 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-01-30 22:11:29,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065378902] [2022-01-30 22:11:29,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:29,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:29,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:29,386 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) [2022-01-30 22:11:29,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 22:11:29,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:29,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-30 22:11:29,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-30 22:11:29,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:11:29,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065378902] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:11:29,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:11:29,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-30 22:11:29,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673461979] [2022-01-30 22:11:29,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:11:29,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-30 22:11:29,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:29,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-30 22:11:29,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-30 22:11:29,567 INFO L87 Difference]: Start difference. First operand has 37 states, 25 states have (on average 1.4) internal successors, (35), 26 states have internal predecessors, (35), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:11:29,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:29,579 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2022-01-30 22:11:29,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-30 22:11:29,581 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-01-30 22:11:29,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:29,585 INFO L225 Difference]: With dead ends: 64 [2022-01-30 22:11:29,585 INFO L226 Difference]: Without dead ends: 32 [2022-01-30 22:11:29,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-30 22:11:29,589 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:29,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:29,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-30 22:11:29,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-30 22:11:29,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:29,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-01-30 22:11:29,612 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 37 [2022-01-30 22:11:29,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:29,613 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-01-30 22:11:29,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:11:29,613 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-01-30 22:11:29,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-30 22:11:29,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:29,614 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:29,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:29,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-01-30 22:11:29,841 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:29,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:29,841 INFO L85 PathProgramCache]: Analyzing trace with hash -173787228, now seen corresponding path program 1 times [2022-01-30 22:11:29,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:29,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130243218] [2022-01-30 22:11:29,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:29,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:29,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:11:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:29,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-30 22:11:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:29,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-30 22:11:29,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:29,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130243218] [2022-01-30 22:11:29,896 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-01-30 22:11:29,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290869413] [2022-01-30 22:11:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:29,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:29,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:29,897 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) [2022-01-30 22:11:29,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 22:11:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:29,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 22:11:29,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-30 22:11:30,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:11:30,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290869413] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:11:30,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:11:30,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 22:11:30,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522858246] [2022-01-30 22:11:30,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:11:30,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 22:11:30,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:30,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 22:11:30,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-30 22:11:30,022 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:11:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:30,040 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-01-30 22:11:30,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 22:11:30,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-01-30 22:11:30,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:30,043 INFO L225 Difference]: With dead ends: 56 [2022-01-30 22:11:30,043 INFO L226 Difference]: Without dead ends: 34 [2022-01-30 22:11:30,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-30 22:11:30,045 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 1 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:30,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 70 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:30,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-30 22:11:30,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-01-30 22:11:30,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:30,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-01-30 22:11:30,051 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 37 [2022-01-30 22:11:30,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:30,051 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-01-30 22:11:30,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:11:30,052 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-01-30 22:11:30,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-30 22:11:30,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:30,053 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:30,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:30,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-01-30 22:11:30,273 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:30,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:30,274 INFO L85 PathProgramCache]: Analyzing trace with hash -886074366, now seen corresponding path program 1 times [2022-01-30 22:11:30,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:30,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509705498] [2022-01-30 22:11:30,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:30,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:30,289 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:30,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469290152] [2022-01-30 22:11:30,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:30,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:30,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:30,298 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) [2022-01-30 22:11:30,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 22:11:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:30,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 22:11:30,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-30 22:11:30,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:11:30,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:30,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509705498] [2022-01-30 22:11:30,428 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:30,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469290152] [2022-01-30 22:11:30,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469290152] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:11:30,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:11:30,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 22:11:30,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478899295] [2022-01-30 22:11:30,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:11:30,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 22:11:30,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:30,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 22:11:30,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 22:11:30,430 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:11:30,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:30,446 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-01-30 22:11:30,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 22:11:30,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-01-30 22:11:30,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:30,448 INFO L225 Difference]: With dead ends: 54 [2022-01-30 22:11:30,448 INFO L226 Difference]: Without dead ends: 36 [2022-01-30 22:11:30,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 22:11:30,451 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:30,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 67 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:30,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-30 22:11:30,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-01-30 22:11:30,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:30,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-01-30 22:11:30,465 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 39 [2022-01-30 22:11:30,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:30,465 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-01-30 22:11:30,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:11:30,466 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-01-30 22:11:30,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-30 22:11:30,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:30,468 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:30,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:30,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:30,685 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:30,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:30,685 INFO L85 PathProgramCache]: Analyzing trace with hash 527335525, now seen corresponding path program 1 times [2022-01-30 22:11:30,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:30,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695706819] [2022-01-30 22:11:30,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:30,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:30,699 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:30,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437710684] [2022-01-30 22:11:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:30,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:30,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:30,705 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) [2022-01-30 22:11:30,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 22:11:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:30,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 22:11:30,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-30 22:11:30,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:11:30,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:30,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695706819] [2022-01-30 22:11:30,824 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:30,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437710684] [2022-01-30 22:11:30,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437710684] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:11:30,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:11:30,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 22:11:30,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994701200] [2022-01-30 22:11:30,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:11:30,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 22:11:30,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:30,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 22:11:30,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 22:11:30,825 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:11:30,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:30,833 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-01-30 22:11:30,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 22:11:30,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2022-01-30 22:11:30,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:30,838 INFO L225 Difference]: With dead ends: 52 [2022-01-30 22:11:30,838 INFO L226 Difference]: Without dead ends: 37 [2022-01-30 22:11:30,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 22:11:30,842 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 1 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:30,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 70 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:30,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-30 22:11:30,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-01-30 22:11:30,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:30,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-01-30 22:11:30,851 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 48 [2022-01-30 22:11:30,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:30,852 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-01-30 22:11:30,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:11:30,853 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-01-30 22:11:30,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-30 22:11:30,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:30,853 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:30,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:31,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:31,054 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:31,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:31,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1044403897, now seen corresponding path program 1 times [2022-01-30 22:11:31,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:31,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032085787] [2022-01-30 22:11:31,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:31,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:31,066 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:31,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831478588] [2022-01-30 22:11:31,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:31,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:31,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:31,073 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) [2022-01-30 22:11:31,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-30 22:11:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:31,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 22:11:31,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-30 22:11:31,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:11:31,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:31,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032085787] [2022-01-30 22:11:31,227 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:31,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831478588] [2022-01-30 22:11:31,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831478588] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:11:31,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:11:31,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 22:11:31,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819935648] [2022-01-30 22:11:31,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:11:31,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 22:11:31,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:31,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 22:11:31,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 22:11:31,230 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:11:31,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:31,246 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2022-01-30 22:11:31,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 22:11:31,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2022-01-30 22:11:31,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:31,249 INFO L225 Difference]: With dead ends: 63 [2022-01-30 22:11:31,249 INFO L226 Difference]: Without dead ends: 42 [2022-01-30 22:11:31,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 22:11:31,251 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:31,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 70 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:31,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-30 22:11:31,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-01-30 22:11:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:31,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-01-30 22:11:31,264 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 50 [2022-01-30 22:11:31,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:31,265 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-01-30 22:11:31,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:11:31,265 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-01-30 22:11:31,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-30 22:11:31,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:31,268 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:31,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:31,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:31,469 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:31,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:31,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1413282844, now seen corresponding path program 1 times [2022-01-30 22:11:31,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:31,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830674576] [2022-01-30 22:11:31,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:31,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:31,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:11:31,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:31,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-30 22:11:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:31,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-30 22:11:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:31,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-30 22:11:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:31,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-30 22:11:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:31,554 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-30 22:11:31,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:31,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830674576] [2022-01-30 22:11:31,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830674576] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:11:31,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930427297] [2022-01-30 22:11:31,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:31,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:31,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:31,559 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) [2022-01-30 22:11:31,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-30 22:11:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:31,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 22:11:31,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:31,720 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-30 22:11:31,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-30 22:11:31,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930427297] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:31,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:11:31,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 10 [2022-01-30 22:11:31,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861841852] [2022-01-30 22:11:31,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:31,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-30 22:11:31,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:31,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-30 22:11:31,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-30 22:11:31,812 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 22:11:31,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:31,983 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2022-01-30 22:11:31,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-30 22:11:31,984 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-01-30 22:11:31,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:31,985 INFO L225 Difference]: With dead ends: 79 [2022-01-30 22:11:31,985 INFO L226 Difference]: Without dead ends: 50 [2022-01-30 22:11:31,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-01-30 22:11:31,986 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 54 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:31,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 35 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:11:31,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-30 22:11:31,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-30 22:11:31,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:31,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-01-30 22:11:31,990 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 50 [2022-01-30 22:11:31,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:31,990 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-01-30 22:11:31,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 22:11:31,990 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-01-30 22:11:31,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-30 22:11:31,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:31,991 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:32,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:32,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:32,208 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:32,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:32,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1142374631, now seen corresponding path program 2 times [2022-01-30 22:11:32,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:32,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327219825] [2022-01-30 22:11:32,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:32,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:32,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:11:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:32,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-30 22:11:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:32,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-30 22:11:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:32,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:11:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:32,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-30 22:11:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-01-30 22:11:32,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:32,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327219825] [2022-01-30 22:11:32,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327219825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:11:32,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653777529] [2022-01-30 22:11:32,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:11:32,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:32,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:32,293 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) [2022-01-30 22:11:32,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-30 22:11:32,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:11:32,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:11:32,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 22:11:32,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-01-30 22:11:32,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-01-30 22:11:32,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653777529] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:32,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:11:32,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2022-01-30 22:11:32,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411468286] [2022-01-30 22:11:32,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:32,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-30 22:11:32,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:32,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-30 22:11:32,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-01-30 22:11:32,577 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-30 22:11:32,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:32,821 INFO L93 Difference]: Finished difference Result 96 states and 122 transitions. [2022-01-30 22:11:32,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-30 22:11:32,821 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 65 [2022-01-30 22:11:32,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:32,823 INFO L225 Difference]: With dead ends: 96 [2022-01-30 22:11:32,823 INFO L226 Difference]: Without dead ends: 64 [2022-01-30 22:11:32,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2022-01-30 22:11:32,825 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 74 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:32,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 37 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:11:32,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-30 22:11:32,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2022-01-30 22:11:32,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:32,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2022-01-30 22:11:32,829 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 65 [2022-01-30 22:11:32,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:32,829 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2022-01-30 22:11:32,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-30 22:11:32,829 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2022-01-30 22:11:32,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-30 22:11:32,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:32,830 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:32,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-30 22:11:33,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:33,036 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:33,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:33,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1692207533, now seen corresponding path program 1 times [2022-01-30 22:11:33,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:33,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775072584] [2022-01-30 22:11:33,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:33,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:33,059 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:33,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203782791] [2022-01-30 22:11:33,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:33,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:33,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:33,064 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) [2022-01-30 22:11:33,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-30 22:11:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:33,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-30 22:11:33,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-01-30 22:11:33,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-01-30 22:11:33,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:33,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775072584] [2022-01-30 22:11:33,568 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:33,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203782791] [2022-01-30 22:11:33,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203782791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:33,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:33,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-30 22:11:33,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665321171] [2022-01-30 22:11:33,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:33,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-30 22:11:33,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:33,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-30 22:11:33,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-01-30 22:11:33,570 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 22:11:33,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:33,631 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2022-01-30 22:11:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-30 22:11:33,631 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 86 [2022-01-30 22:11:33,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:33,632 INFO L225 Difference]: With dead ends: 113 [2022-01-30 22:11:33,632 INFO L226 Difference]: Without dead ends: 83 [2022-01-30 22:11:33,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-01-30 22:11:33,633 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 33 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:33,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 104 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:11:33,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-30 22:11:33,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-01-30 22:11:33,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 73 states have internal predecessors, (78), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2022-01-30 22:11:33,639 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 86 [2022-01-30 22:11:33,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:33,639 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2022-01-30 22:11:33,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 22:11:33,639 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2022-01-30 22:11:33,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-30 22:11:33,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:33,640 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:33,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:33,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-01-30 22:11:33,848 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:33,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:33,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1742298603, now seen corresponding path program 2 times [2022-01-30 22:11:33,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:33,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078338488] [2022-01-30 22:11:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:33,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:33,871 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:33,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320859729] [2022-01-30 22:11:33,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:11:33,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:33,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:33,873 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) [2022-01-30 22:11:33,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-30 22:11:33,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:11:33,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:11:33,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-30 22:11:33,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-01-30 22:11:34,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-01-30 22:11:34,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:34,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078338488] [2022-01-30 22:11:34,962 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:34,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320859729] [2022-01-30 22:11:34,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320859729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:34,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:34,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-01-30 22:11:34,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275258449] [2022-01-30 22:11:34,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:34,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-30 22:11:34,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:34,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-30 22:11:34,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2022-01-30 22:11:34,967 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 22:11:35,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:35,086 INFO L93 Difference]: Finished difference Result 161 states and 196 transitions. [2022-01-30 22:11:35,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-30 22:11:35,086 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 110 [2022-01-30 22:11:35,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:35,088 INFO L225 Difference]: With dead ends: 161 [2022-01-30 22:11:35,089 INFO L226 Difference]: Without dead ends: 131 [2022-01-30 22:11:35,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2022-01-30 22:11:35,090 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 69 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:35,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 172 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:11:35,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-30 22:11:35,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-01-30 22:11:35,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 121 states have internal predecessors, (126), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:35,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 137 transitions. [2022-01-30 22:11:35,097 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 137 transitions. Word has length 110 [2022-01-30 22:11:35,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:35,097 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 137 transitions. [2022-01-30 22:11:35,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 22:11:35,098 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 137 transitions. [2022-01-30 22:11:35,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-30 22:11:35,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:35,099 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:35,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:35,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:35,311 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:35,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:35,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1033393435, now seen corresponding path program 3 times [2022-01-30 22:11:35,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:35,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378409249] [2022-01-30 22:11:35,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:35,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:35,370 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:35,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118066903] [2022-01-30 22:11:35,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:11:35,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:35,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:35,373 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:11:35,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-30 22:11:35,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-30 22:11:35,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:11:35,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 22:11:35,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2267 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 2190 trivial. 0 not checked. [2022-01-30 22:11:35,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2267 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2266 trivial. 0 not checked. [2022-01-30 22:11:35,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:35,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378409249] [2022-01-30 22:11:35,800 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:35,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118066903] [2022-01-30 22:11:35,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118066903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:35,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:35,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-30 22:11:35,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340012905] [2022-01-30 22:11:35,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:35,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-30 22:11:35,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:35,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-30 22:11:35,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-30 22:11:35,801 INFO L87 Difference]: Start difference. First operand 131 states and 137 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:11:35,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:35,813 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2022-01-30 22:11:35,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-30 22:11:35,814 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 158 [2022-01-30 22:11:35,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:35,815 INFO L225 Difference]: With dead ends: 157 [2022-01-30 22:11:35,815 INFO L226 Difference]: Without dead ends: 137 [2022-01-30 22:11:35,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-30 22:11:35,815 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:35,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 138 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:35,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-30 22:11:35,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-01-30 22:11:35,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 127 states have internal predecessors, (132), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 143 transitions. [2022-01-30 22:11:35,822 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 143 transitions. Word has length 158 [2022-01-30 22:11:35,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:35,822 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 143 transitions. [2022-01-30 22:11:35,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:11:35,823 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 143 transitions. [2022-01-30 22:11:35,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-30 22:11:35,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:35,823 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:35,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:36,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-30 22:11:36,039 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:36,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:36,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1072805825, now seen corresponding path program 4 times [2022-01-30 22:11:36,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:36,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504719311] [2022-01-30 22:11:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:36,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:36,072 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:36,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308783744] [2022-01-30 22:11:36,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:11:36,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:36,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:36,076 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:11:36,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-30 22:11:36,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 22:11:36,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:11:36,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 22:11:36,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 108 proven. 7 refuted. 0 times theorem prover too weak. 2167 trivial. 0 not checked. [2022-01-30 22:11:36,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 42 proven. 44 refuted. 0 times theorem prover too weak. 2196 trivial. 0 not checked. [2022-01-30 22:11:36,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:36,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504719311] [2022-01-30 22:11:36,568 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:36,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308783744] [2022-01-30 22:11:36,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308783744] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:36,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:36,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-30 22:11:36,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646159147] [2022-01-30 22:11:36,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:36,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 22:11:36,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:36,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 22:11:36,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-01-30 22:11:36,570 INFO L87 Difference]: Start difference. First operand 137 states and 143 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:11:36,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:36,594 INFO L93 Difference]: Finished difference Result 181 states and 198 transitions. [2022-01-30 22:11:36,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-30 22:11:36,594 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 164 [2022-01-30 22:11:36,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:36,595 INFO L225 Difference]: With dead ends: 181 [2022-01-30 22:11:36,595 INFO L226 Difference]: Without dead ends: 149 [2022-01-30 22:11:36,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-01-30 22:11:36,596 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:36,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 131 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:36,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-30 22:11:36,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-01-30 22:11:36,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 139 states have internal predecessors, (144), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:36,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 155 transitions. [2022-01-30 22:11:36,601 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 155 transitions. Word has length 164 [2022-01-30 22:11:36,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:36,601 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 155 transitions. [2022-01-30 22:11:36,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:11:36,602 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 155 transitions. [2022-01-30 22:11:36,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-30 22:11:36,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:36,603 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 21, 21, 18, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:36,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:36,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-30 22:11:36,813 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:36,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:36,813 INFO L85 PathProgramCache]: Analyzing trace with hash 861242113, now seen corresponding path program 5 times [2022-01-30 22:11:36,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:36,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264067365] [2022-01-30 22:11:36,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:36,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:36,845 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:36,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852748539] [2022-01-30 22:11:36,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 22:11:36,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:36,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:36,846 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:11:36,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-30 22:11:41,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2022-01-30 22:11:41,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:11:41,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 22:11:41,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2840 backedges. 354 proven. 2 refuted. 0 times theorem prover too weak. 2484 trivial. 0 not checked. [2022-01-30 22:11:42,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2840 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 2730 trivial. 0 not checked. [2022-01-30 22:11:42,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:42,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264067365] [2022-01-30 22:11:42,269 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:42,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852748539] [2022-01-30 22:11:42,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852748539] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:42,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:42,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-30 22:11:42,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052606287] [2022-01-30 22:11:42,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:42,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 22:11:42,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:42,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 22:11:42,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-01-30 22:11:42,271 INFO L87 Difference]: Start difference. First operand 149 states and 155 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:11:42,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:42,295 INFO L93 Difference]: Finished difference Result 205 states and 226 transitions. [2022-01-30 22:11:42,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-30 22:11:42,299 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 200 [2022-01-30 22:11:42,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:42,301 INFO L225 Difference]: With dead ends: 205 [2022-01-30 22:11:42,301 INFO L226 Difference]: Without dead ends: 161 [2022-01-30 22:11:42,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-01-30 22:11:42,303 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 22 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:42,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 98 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:42,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-30 22:11:42,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-01-30 22:11:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 151 states have (on average 1.0596026490066226) internal successors, (160), 151 states have internal predecessors, (160), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:42,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 171 transitions. [2022-01-30 22:11:42,316 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 171 transitions. Word has length 200 [2022-01-30 22:11:42,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:42,316 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 171 transitions. [2022-01-30 22:11:42,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:11:42,317 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 171 transitions. [2022-01-30 22:11:42,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-01-30 22:11:42,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:42,318 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 33, 33, 18, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:42,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:42,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-30 22:11:42,535 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:42,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:42,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1642396991, now seen corresponding path program 6 times [2022-01-30 22:11:42,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:42,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873848333] [2022-01-30 22:11:42,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:42,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:42,578 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:42,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990264220] [2022-01-30 22:11:42,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-30 22:11:42,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:42,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:42,581 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:11:42,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-30 22:11:42,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-30 22:11:42,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:11:42,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 22:11:42,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3830 backedges. 780 proven. 16 refuted. 0 times theorem prover too weak. 3034 trivial. 0 not checked. [2022-01-30 22:11:43,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3830 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3814 trivial. 0 not checked. [2022-01-30 22:11:43,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:43,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873848333] [2022-01-30 22:11:43,488 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:43,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990264220] [2022-01-30 22:11:43,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990264220] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:43,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:43,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-30 22:11:43,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476422420] [2022-01-30 22:11:43,488 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:43,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-30 22:11:43,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:43,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-30 22:11:43,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-01-30 22:11:43,489 INFO L87 Difference]: Start difference. First operand 161 states and 171 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:11:43,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:43,545 INFO L93 Difference]: Finished difference Result 217 states and 239 transitions. [2022-01-30 22:11:43,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-30 22:11:43,546 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 236 [2022-01-30 22:11:43,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:43,546 INFO L225 Difference]: With dead ends: 217 [2022-01-30 22:11:43,547 INFO L226 Difference]: Without dead ends: 173 [2022-01-30 22:11:43,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-01-30 22:11:43,547 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:43,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 138 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:43,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-30 22:11:43,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-01-30 22:11:43,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 163 states have (on average 1.0552147239263803) internal successors, (172), 163 states have internal predecessors, (172), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:43,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 183 transitions. [2022-01-30 22:11:43,553 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 183 transitions. Word has length 236 [2022-01-30 22:11:43,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:43,554 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 183 transitions. [2022-01-30 22:11:43,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:11:43,554 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 183 transitions. [2022-01-30 22:11:43,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-01-30 22:11:43,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:43,556 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 33, 33, 18, 15, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:43,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:43,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-30 22:11:43,774 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:43,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:43,775 INFO L85 PathProgramCache]: Analyzing trace with hash 884393613, now seen corresponding path program 7 times [2022-01-30 22:11:43,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:43,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871129650] [2022-01-30 22:11:43,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:43,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:43,807 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:43,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612932525] [2022-01-30 22:11:43,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-30 22:11:43,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:43,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:43,809 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:11:43,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-30 22:11:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:43,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-30 22:11:43,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3914 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 1798 trivial. 0 not checked. [2022-01-30 22:11:44,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:45,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3914 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 1798 trivial. 0 not checked. [2022-01-30 22:11:45,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:45,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871129650] [2022-01-30 22:11:45,683 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:45,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612932525] [2022-01-30 22:11:45,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612932525] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:45,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:45,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 62 [2022-01-30 22:11:45,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155060882] [2022-01-30 22:11:45,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:45,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-30 22:11:45,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:45,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-30 22:11:45,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2022-01-30 22:11:45,685 INFO L87 Difference]: Start difference. First operand 173 states and 183 transitions. Second operand has 62 states, 62 states have (on average 2.4516129032258065) internal successors, (152), 62 states have internal predecessors, (152), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 22:11:45,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:45,804 INFO L93 Difference]: Finished difference Result 273 states and 306 transitions. [2022-01-30 22:11:45,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-30 22:11:45,804 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.4516129032258065) internal successors, (152), 62 states have internal predecessors, (152), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 248 [2022-01-30 22:11:45,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:45,805 INFO L225 Difference]: With dead ends: 273 [2022-01-30 22:11:45,805 INFO L226 Difference]: Without dead ends: 201 [2022-01-30 22:11:45,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 434 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2022-01-30 22:11:45,807 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 60 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:45,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 172 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:11:45,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-01-30 22:11:45,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-01-30 22:11:45,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 191 states have (on average 1.0471204188481675) internal successors, (200), 191 states have internal predecessors, (200), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 211 transitions. [2022-01-30 22:11:45,813 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 211 transitions. Word has length 248 [2022-01-30 22:11:45,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:45,813 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 211 transitions. [2022-01-30 22:11:45,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.4516129032258065) internal successors, (152), 62 states have internal predecessors, (152), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 22:11:45,813 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 211 transitions. [2022-01-30 22:11:45,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-01-30 22:11:45,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:45,816 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 33, 33, 18, 15, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:45,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:46,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:46,031 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:46,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:46,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1741594263, now seen corresponding path program 8 times [2022-01-30 22:11:46,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:46,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255124066] [2022-01-30 22:11:46,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:46,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:46,065 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:46,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255898495] [2022-01-30 22:11:46,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:11:46,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:46,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:46,066 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:11:46,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-30 22:11:46,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:11:46,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:11:46,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-30 22:11:46,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5398 backedges. 549 proven. 57 refuted. 0 times theorem prover too weak. 4792 trivial. 0 not checked. [2022-01-30 22:11:46,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5398 backedges. 93 proven. 835 refuted. 0 times theorem prover too weak. 4470 trivial. 0 not checked. [2022-01-30 22:11:46,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:46,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255124066] [2022-01-30 22:11:46,873 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:46,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255898495] [2022-01-30 22:11:46,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255898495] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:46,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:46,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-30 22:11:46,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316805239] [2022-01-30 22:11:46,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:46,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-30 22:11:46,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:46,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-30 22:11:46,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-01-30 22:11:46,874 INFO L87 Difference]: Start difference. First operand 201 states and 211 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:11:46,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:46,914 INFO L93 Difference]: Finished difference Result 293 states and 322 transitions. [2022-01-30 22:11:46,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-30 22:11:46,922 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 276 [2022-01-30 22:11:46,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:46,923 INFO L225 Difference]: With dead ends: 293 [2022-01-30 22:11:46,923 INFO L226 Difference]: Without dead ends: 225 [2022-01-30 22:11:46,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-01-30 22:11:46,924 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 21 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:46,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 131 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:46,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-01-30 22:11:46,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2022-01-30 22:11:46,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 215 states have (on average 1.041860465116279) internal successors, (224), 215 states have internal predecessors, (224), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:46,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 235 transitions. [2022-01-30 22:11:46,930 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 235 transitions. Word has length 276 [2022-01-30 22:11:46,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:46,930 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 235 transitions. [2022-01-30 22:11:46,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:11:46,930 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 235 transitions. [2022-01-30 22:11:46,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2022-01-30 22:11:46,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:46,933 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 57, 57, 42, 15, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:46,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-30 22:11:47,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-30 22:11:47,147 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:47,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:47,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1355401239, now seen corresponding path program 9 times [2022-01-30 22:11:47,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:47,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665867630] [2022-01-30 22:11:47,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:47,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:47,194 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:47,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164414391] [2022-01-30 22:11:47,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:11:47,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:47,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:47,195 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:11:47,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-30 22:11:47,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-30 22:11:47,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:11:47,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-30 22:11:47,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8674 backedges. 896 proven. 40 refuted. 0 times theorem prover too weak. 7738 trivial. 0 not checked. [2022-01-30 22:11:47,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8674 backedges. 896 proven. 40 refuted. 0 times theorem prover too weak. 7738 trivial. 0 not checked. [2022-01-30 22:11:48,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:48,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665867630] [2022-01-30 22:11:48,283 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:48,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164414391] [2022-01-30 22:11:48,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164414391] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:48,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:48,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-30 22:11:48,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305822824] [2022-01-30 22:11:48,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:48,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-30 22:11:48,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:48,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-30 22:11:48,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-01-30 22:11:48,284 INFO L87 Difference]: Start difference. First operand 225 states and 235 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-30 22:11:48,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:48,355 INFO L93 Difference]: Finished difference Result 341 states and 378 transitions. [2022-01-30 22:11:48,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-30 22:11:48,359 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 348 [2022-01-30 22:11:48,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:48,360 INFO L225 Difference]: With dead ends: 341 [2022-01-30 22:11:48,360 INFO L226 Difference]: Without dead ends: 249 [2022-01-30 22:11:48,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 681 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-01-30 22:11:48,360 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 51 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:48,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 98 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:11:48,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-01-30 22:11:48,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-01-30 22:11:48,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 239 states have (on average 1.0711297071129706) internal successors, (256), 239 states have internal predecessors, (256), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 267 transitions. [2022-01-30 22:11:48,369 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 267 transitions. Word has length 348 [2022-01-30 22:11:48,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:48,369 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 267 transitions. [2022-01-30 22:11:48,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-30 22:11:48,370 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 267 transitions. [2022-01-30 22:11:48,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2022-01-30 22:11:48,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:48,372 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 60, 60, 42, 39, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:48,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:48,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-30 22:11:48,583 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:48,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:48,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1220151447, now seen corresponding path program 10 times [2022-01-30 22:11:48,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:48,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015863467] [2022-01-30 22:11:48,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:48,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:48,622 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:48,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104317031] [2022-01-30 22:11:48,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:11:48,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:48,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:48,624 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:11:48,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-30 22:11:48,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 22:11:48,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:11:48,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 1257 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-30 22:11:48,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 13678 backedges. 6252 proven. 301 refuted. 0 times theorem prover too weak. 7125 trivial. 0 not checked. [2022-01-30 22:11:49,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 13678 backedges. 2802 proven. 2546 refuted. 0 times theorem prover too weak. 8330 trivial. 0 not checked. [2022-01-30 22:11:50,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:50,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015863467] [2022-01-30 22:11:50,003 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:50,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104317031] [2022-01-30 22:11:50,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104317031] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:50,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:50,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-01-30 22:11:50,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953691433] [2022-01-30 22:11:50,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:50,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-30 22:11:50,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:50,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-30 22:11:50,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2022-01-30 22:11:50,007 INFO L87 Difference]: Start difference. First operand 249 states and 267 transitions. Second operand has 32 states, 32 states have (on average 3.875) internal successors, (124), 32 states have internal predecessors, (124), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:11:50,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:50,098 INFO L93 Difference]: Finished difference Result 413 states and 466 transitions. [2022-01-30 22:11:50,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-30 22:11:50,099 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.875) internal successors, (124), 32 states have internal predecessors, (124), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 420 [2022-01-30 22:11:50,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:50,100 INFO L225 Difference]: With dead ends: 413 [2022-01-30 22:11:50,100 INFO L226 Difference]: Without dead ends: 297 [2022-01-30 22:11:50,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 839 GetRequests, 809 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2022-01-30 22:11:50,101 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 45 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:50,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 227 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:11:50,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-01-30 22:11:50,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2022-01-30 22:11:50,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 287 states have (on average 1.0592334494773519) internal successors, (304), 287 states have internal predecessors, (304), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:50,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 315 transitions. [2022-01-30 22:11:50,108 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 315 transitions. Word has length 420 [2022-01-30 22:11:50,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:50,109 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 315 transitions. [2022-01-30 22:11:50,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.875) internal successors, (124), 32 states have internal predecessors, (124), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:11:50,109 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 315 transitions. [2022-01-30 22:11:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2022-01-30 22:11:50,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:50,111 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 90, 60, 60, 39, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:50,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:50,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-30 22:11:50,328 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:50,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:50,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1033184361, now seen corresponding path program 11 times [2022-01-30 22:11:50,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:50,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380207109] [2022-01-30 22:11:50,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:50,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:50,368 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:50,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375078998] [2022-01-30 22:11:50,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 22:11:50,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:50,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:50,369 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:11:50,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-30 22:11:50,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-01-30 22:11:50,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:11:50,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-30 22:11:50,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 28870 backedges. 12531 proven. 301 refuted. 0 times theorem prover too weak. 16038 trivial. 0 not checked. [2022-01-30 22:11:51,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 28870 backedges. 1261 proven. 4121 refuted. 0 times theorem prover too weak. 23488 trivial. 0 not checked. [2022-01-30 22:11:51,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:51,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380207109] [2022-01-30 22:11:51,926 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:51,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375078998] [2022-01-30 22:11:51,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375078998] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:51,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:51,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2022-01-30 22:11:51,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91641854] [2022-01-30 22:11:51,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:51,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-30 22:11:51,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:51,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-30 22:11:51,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2022-01-30 22:11:51,928 INFO L87 Difference]: Start difference. First operand 297 states and 315 transitions. Second operand has 32 states, 32 states have (on average 3.84375) internal successors, (123), 32 states have internal predecessors, (123), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:11:52,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:52,062 INFO L93 Difference]: Finished difference Result 509 states and 578 transitions. [2022-01-30 22:11:52,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-30 22:11:52,063 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.84375) internal successors, (123), 32 states have internal predecessors, (123), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 564 [2022-01-30 22:11:52,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:52,065 INFO L225 Difference]: With dead ends: 509 [2022-01-30 22:11:52,065 INFO L226 Difference]: Without dead ends: 345 [2022-01-30 22:11:52,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1127 GetRequests, 1096 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2022-01-30 22:11:52,066 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 76 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:52,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 130 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:11:52,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-01-30 22:11:52,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2022-01-30 22:11:52,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 335 states have (on average 1.0985074626865672) internal successors, (368), 335 states have internal predecessors, (368), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:52,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 379 transitions. [2022-01-30 22:11:52,080 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 379 transitions. Word has length 564 [2022-01-30 22:11:52,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:52,080 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 379 transitions. [2022-01-30 22:11:52,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.84375) internal successors, (123), 32 states have internal predecessors, (123), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:11:52,080 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 379 transitions. [2022-01-30 22:11:52,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2022-01-30 22:11:52,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:52,100 INFO L514 BasicCegarLoop]: trace histogram [177, 177, 90, 87, 60, 60, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:52,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:52,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-30 22:11:52,311 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:52,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:52,312 INFO L85 PathProgramCache]: Analyzing trace with hash 2121016169, now seen corresponding path program 12 times [2022-01-30 22:11:52,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:52,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625761322] [2022-01-30 22:11:52,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:52,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:52,357 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:52,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516087533] [2022-01-30 22:11:52,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-30 22:11:52,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:52,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:52,358 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:11:52,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-30 22:11:53,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2022-01-30 22:11:53,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:11:53,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-30 22:11:53,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 50974 backedges. 21132 proven. 100 refuted. 0 times theorem prover too weak. 29742 trivial. 0 not checked. [2022-01-30 22:11:54,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 50974 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 50874 trivial. 0 not checked. [2022-01-30 22:11:54,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:54,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625761322] [2022-01-30 22:11:54,730 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:54,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516087533] [2022-01-30 22:11:54,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516087533] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:54,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:54,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-30 22:11:54,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229709632] [2022-01-30 22:11:54,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:54,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-30 22:11:54,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:54,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-30 22:11:54,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-01-30 22:11:54,732 INFO L87 Difference]: Start difference. First operand 345 states and 379 transitions. Second operand has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:11:54,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:54,780 INFO L93 Difference]: Finished difference Result 557 states and 633 transitions. [2022-01-30 22:11:54,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-30 22:11:54,783 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 708 [2022-01-30 22:11:54,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:54,785 INFO L225 Difference]: With dead ends: 557 [2022-01-30 22:11:54,785 INFO L226 Difference]: Without dead ends: 369 [2022-01-30 22:11:54,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1415 GetRequests, 1393 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-01-30 22:11:54,786 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 33 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:54,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 138 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:11:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-01-30 22:11:54,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2022-01-30 22:11:54,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 359 states have (on average 1.0919220055710306) internal successors, (392), 359 states have internal predecessors, (392), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:54,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 403 transitions. [2022-01-30 22:11:54,794 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 403 transitions. Word has length 708 [2022-01-30 22:11:54,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:54,794 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 403 transitions. [2022-01-30 22:11:54,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:11:54,795 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 403 transitions. [2022-01-30 22:11:54,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 733 [2022-01-30 22:11:54,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:54,798 INFO L514 BasicCegarLoop]: trace histogram [177, 177, 90, 87, 60, 60, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:54,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:55,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:55,008 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:55,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:55,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1892626689, now seen corresponding path program 13 times [2022-01-30 22:11:55,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:55,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724586398] [2022-01-30 22:11:55,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:55,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:55,055 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:55,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139963493] [2022-01-30 22:11:55,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-30 22:11:55,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:55,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:55,057 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:11:55,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-30 22:11:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:11:55,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 1917 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-30 22:11:55,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 51358 backedges. 13557 proven. 1365 refuted. 0 times theorem prover too weak. 36436 trivial. 0 not checked. [2022-01-30 22:11:56,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:57,132 INFO L134 CoverageAnalysis]: Checked inductivity of 51358 backedges. 2637 proven. 22495 refuted. 0 times theorem prover too weak. 26226 trivial. 0 not checked. [2022-01-30 22:11:57,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:57,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724586398] [2022-01-30 22:11:57,132 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:57,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139963493] [2022-01-30 22:11:57,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139963493] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:57,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:57,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2022-01-30 22:11:57,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755261801] [2022-01-30 22:11:57,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:57,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-30 22:11:57,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:57,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-30 22:11:57,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-01-30 22:11:57,134 INFO L87 Difference]: Start difference. First operand 369 states and 403 transitions. Second operand has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 33 states have internal predecessors, (127), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:11:57,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:57,256 INFO L93 Difference]: Finished difference Result 608 states and 678 transitions. [2022-01-30 22:11:57,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-30 22:11:57,257 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 33 states have internal predecessors, (127), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 732 [2022-01-30 22:11:57,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:57,258 INFO L225 Difference]: With dead ends: 608 [2022-01-30 22:11:57,258 INFO L226 Difference]: Without dead ends: 372 [2022-01-30 22:11:57,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1463 GetRequests, 1431 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-01-30 22:11:57,259 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 31 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:57,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 259 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:11:57,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-01-30 22:11:57,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2022-01-30 22:11:57,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 362 states have (on average 1.091160220994475) internal successors, (395), 362 states have internal predecessors, (395), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:57,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 406 transitions. [2022-01-30 22:11:57,280 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 406 transitions. Word has length 732 [2022-01-30 22:11:57,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:57,281 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 406 transitions. [2022-01-30 22:11:57,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 33 states have internal predecessors, (127), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:11:57,281 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 406 transitions. [2022-01-30 22:11:57,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 742 [2022-01-30 22:11:57,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:57,286 INFO L514 BasicCegarLoop]: trace histogram [180, 180, 93, 87, 60, 60, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:57,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-30 22:11:57,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:57,499 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:11:57,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:11:57,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1858440638, now seen corresponding path program 14 times [2022-01-30 22:11:57,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:11:57,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869786561] [2022-01-30 22:11:57,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:11:57,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:11:57,546 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:11:57,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882035804] [2022-01-30 22:11:57,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:11:57,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:11:57,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:11:57,547 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:11:57,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-30 22:11:57,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:11:57,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:11:57,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 1929 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-30 22:11:57,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:11:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 52969 backedges. 21850 proven. 484 refuted. 0 times theorem prover too weak. 30635 trivial. 0 not checked. [2022-01-30 22:11:58,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:11:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 52969 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 52485 trivial. 0 not checked. [2022-01-30 22:11:59,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:11:59,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869786561] [2022-01-30 22:11:59,818 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:11:59,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882035804] [2022-01-30 22:11:59,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882035804] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:11:59,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:11:59,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-01-30 22:11:59,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292422698] [2022-01-30 22:11:59,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:11:59,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-30 22:11:59,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:11:59,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-30 22:11:59,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2022-01-30 22:11:59,821 INFO L87 Difference]: Start difference. First operand 372 states and 406 transitions. Second operand has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:11:59,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:11:59,944 INFO L93 Difference]: Finished difference Result 611 states and 699 transitions. [2022-01-30 22:11:59,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-30 22:11:59,945 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 741 [2022-01-30 22:11:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:11:59,946 INFO L225 Difference]: With dead ends: 611 [2022-01-30 22:11:59,947 INFO L226 Difference]: Without dead ends: 420 [2022-01-30 22:11:59,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1481 GetRequests, 1435 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2022-01-30 22:11:59,948 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 69 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:11:59,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 206 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:11:59,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-01-30 22:11:59,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 420. [2022-01-30 22:11:59,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 410 states have (on average 1.0804878048780489) internal successors, (443), 410 states have internal predecessors, (443), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:11:59,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 454 transitions. [2022-01-30 22:11:59,957 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 454 transitions. Word has length 741 [2022-01-30 22:11:59,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:11:59,958 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 454 transitions. [2022-01-30 22:11:59,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:11:59,958 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 454 transitions. [2022-01-30 22:11:59,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2022-01-30 22:11:59,962 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:11:59,962 INFO L514 BasicCegarLoop]: trace histogram [180, 180, 93, 87, 60, 60, 46, 46, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:11:59,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-30 22:12:00,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:12:00,183 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:12:00,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:12:00,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1446625138, now seen corresponding path program 15 times [2022-01-30 22:12:00,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:12:00,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574522944] [2022-01-30 22:12:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:12:00,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:12:00,252 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:12:00,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918689358] [2022-01-30 22:12:00,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:12:00,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:12:00,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:12:00,264 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:12:00,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-30 22:25:47,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2022-01-30 22:25:47,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:25:48,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 83 conjunts are in the unsatisfiable core [2022-01-30 22:25:48,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:25:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 54601 backedges. 21969 proven. 2116 refuted. 0 times theorem prover too weak. 30516 trivial. 0 not checked. [2022-01-30 22:25:49,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:25:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 54601 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 52485 trivial. 0 not checked. [2022-01-30 22:25:50,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:25:50,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574522944] [2022-01-30 22:25:50,686 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:25:50,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918689358] [2022-01-30 22:25:50,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918689358] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:25:50,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:25:50,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 49] total 63 [2022-01-30 22:25:50,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759715010] [2022-01-30 22:25:50,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:25:50,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-30 22:25:50,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:25:50,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-30 22:25:50,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1835, Invalid=2071, Unknown=0, NotChecked=0, Total=3906 [2022-01-30 22:25:50,688 INFO L87 Difference]: Start difference. First operand 420 states and 454 transitions. Second operand has 63 states, 63 states have (on average 2.4285714285714284) internal successors, (153), 63 states have internal predecessors, (153), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:25:50,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:25:50,813 INFO L93 Difference]: Finished difference Result 637 states and 714 transitions. [2022-01-30 22:25:50,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-30 22:25:50,825 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.4285714285714284) internal successors, (153), 63 states have internal predecessors, (153), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 789 [2022-01-30 22:25:50,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:25:50,827 INFO L225 Difference]: With dead ends: 637 [2022-01-30 22:25:50,827 INFO L226 Difference]: Without dead ends: 446 [2022-01-30 22:25:50,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1577 GetRequests, 1515 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1835, Invalid=2071, Unknown=0, NotChecked=0, Total=3906 [2022-01-30 22:25:50,829 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 63 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:25:50,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 251 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:25:50,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-01-30 22:25:50,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2022-01-30 22:25:50,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 436 states have (on average 1.0756880733944953) internal successors, (469), 436 states have internal predecessors, (469), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:25:50,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 480 transitions. [2022-01-30 22:25:50,842 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 480 transitions. Word has length 789 [2022-01-30 22:25:50,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:25:50,842 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 480 transitions. [2022-01-30 22:25:50,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.4285714285714284) internal successors, (153), 63 states have internal predecessors, (153), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:25:50,843 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 480 transitions. [2022-01-30 22:25:50,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 816 [2022-01-30 22:25:50,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:25:50,847 INFO L514 BasicCegarLoop]: trace histogram [180, 180, 93, 87, 60, 60, 59, 59, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:25:51,059 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forcibly destroying the process [2022-01-30 22:25:51,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 137 [2022-01-30 22:25:51,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:25:51,135 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:25:51,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:25:51,136 INFO L85 PathProgramCache]: Analyzing trace with hash -289598380, now seen corresponding path program 16 times [2022-01-30 22:25:51,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:25:51,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891183245] [2022-01-30 22:25:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:25:51,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:25:51,209 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:25:51,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366077695] [2022-01-30 22:25:51,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:25:51,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:25:51,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:25:51,224 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:25:51,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process