/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/nla-digbench-scaling/egcd3-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 00:42:24,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 00:42:24,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 00:42:24,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 00:42:24,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 00:42:24,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 00:42:24,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 00:42:24,987 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-20 00:42:25,016 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 00:42:25,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 00:42:25,016 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-20 00:42:25,016 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-20 00:42:25,018 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 00:42:25,018 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 00:42:25,018 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 00:42:25,018 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 00:42:25,019 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 00:42:25,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 00:42:25,020 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 00:42:25,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 00:42:25,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 00:42:25,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 00:42:25,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 00:42:25,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 00:42:25,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 00:42:25,021 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 00:42:25,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 00:42:25,022 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 00:42:25,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 00:42:25,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 00:42:25,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 00:42:25,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 00:42:25,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:42:25,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 00:42:25,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 00:42:25,023 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 00:42:25,023 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 00:42:25,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 00:42:25,023 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-20 00:42:25,023 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-20 00:42:25,023 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 00:42:25,023 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 00:42:25,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 00:42:25,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 00:42:25,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 00:42:25,250 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 00:42:25,251 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 00:42:25,252 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c [2022-03-20 00:42:25,319 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26b3fdcbf/f73272b9816943b0af9101b73e25253b/FLAGfff4a773e [2022-03-20 00:42:25,668 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 00:42:25,669 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c [2022-03-20 00:42:25,674 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26b3fdcbf/f73272b9816943b0af9101b73e25253b/FLAGfff4a773e [2022-03-20 00:42:25,682 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26b3fdcbf/f73272b9816943b0af9101b73e25253b [2022-03-20 00:42:25,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 00:42:25,685 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 00:42:25,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 00:42:25,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 00:42:25,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 00:42:25,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:42:25" (1/1) ... [2022-03-20 00:42:25,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43e9f313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:42:25, skipping insertion in model container [2022-03-20 00:42:25,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:42:25" (1/1) ... [2022-03-20 00:42:25,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 00:42:25,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 00:42:25,843 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2022-03-20 00:42:25,857 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:42:25,863 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 00:42:25,872 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2022-03-20 00:42:25,879 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:42:25,889 INFO L208 MainTranslator]: Completed translation [2022-03-20 00:42:25,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:42:25 WrapperNode [2022-03-20 00:42:25,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 00:42:25,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 00:42:25,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 00:42:25,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 00:42:25,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:42:25" (1/1) ... [2022-03-20 00:42:25,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:42:25" (1/1) ... [2022-03-20 00:42:25,904 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:42:25" (1/1) ... [2022-03-20 00:42:25,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:42:25" (1/1) ... [2022-03-20 00:42:25,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:42:25" (1/1) ... [2022-03-20 00:42:25,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:42:25" (1/1) ... [2022-03-20 00:42:25,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:42:25" (1/1) ... [2022-03-20 00:42:25,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 00:42:25,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 00:42:25,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 00:42:25,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 00:42:25,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:42:25" (1/1) ... [2022-03-20 00:42:25,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:42:25,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:42:25,948 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 00:42:25,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 00:42:25,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 00:42:25,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 00:42:25,981 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 00:42:25,981 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 00:42:25,981 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 00:42:25,981 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 00:42:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 00:42:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 00:42:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 00:42:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 00:42:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 00:42:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 00:42:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 00:42:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 00:42:25,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 00:42:25,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 00:42:25,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 00:42:25,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 00:42:25,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 00:42:25,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 00:42:26,030 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 00:42:26,031 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 00:42:26,148 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 00:42:26,154 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 00:42:26,154 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 00:42:26,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:42:26 BoogieIcfgContainer [2022-03-20 00:42:26,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 00:42:26,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 00:42:26,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 00:42:26,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 00:42:26,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:42:25" (1/3) ... [2022-03-20 00:42:26,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e3394bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:42:26, skipping insertion in model container [2022-03-20 00:42:26,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:42:25" (2/3) ... [2022-03-20 00:42:26,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e3394bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:42:26, skipping insertion in model container [2022-03-20 00:42:26,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:42:26" (3/3) ... [2022-03-20 00:42:26,177 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.c [2022-03-20 00:42:26,181 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 00:42:26,181 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 00:42:26,222 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 00:42:26,228 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 00:42:26,228 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 00:42:26,242 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 00:42:26,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 00:42:26,247 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:42:26,247 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:42:26,248 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:42:26,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:42:26,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2022-03-20 00:42:26,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:42:26,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833941839] [2022-03-20 00:42:26,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:26,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:42:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:42:26,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 00:42:26,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:42:26,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 00:42:26,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:42:26,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 00:42:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:42:26,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 00:42:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:42:26,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 00:42:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:42:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 00:42:26,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:42:26,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833941839] [2022-03-20 00:42:26,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833941839] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:42:26,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:42:26,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 00:42:26,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675954189] [2022-03-20 00:42:26,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:42:26,521 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 00:42:26,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:42:26,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 00:42:26,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:42:26,553 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:42:26,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:42:26,655 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-03-20 00:42:26,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 00:42:26,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 00:42:26,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:42:26,666 INFO L225 Difference]: With dead ends: 73 [2022-03-20 00:42:26,666 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 00:42:26,670 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:42:26,673 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:42:26,674 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:42:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 00:42:26,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 00:42:26,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 00:42:26,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-20 00:42:26,726 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-03-20 00:42:26,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:42:26,727 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-20 00:42:26,728 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:42:26,729 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-20 00:42:26,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 00:42:26,732 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:42:26,733 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:42:26,734 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 00:42:26,734 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:42:26,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:42:26,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2022-03-20 00:42:26,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:42:26,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978518506] [2022-03-20 00:42:26,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:26,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:42:26,774 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:42:26,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970338028] [2022-03-20 00:42:26,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:26,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:26,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:42:26,780 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:42:26,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 00:42:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:42:26,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:42:26,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:42:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 00:42:26,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:42:26,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:42:26,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978518506] [2022-03-20 00:42:26,944 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:42:26,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970338028] [2022-03-20 00:42:26,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970338028] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:42:26,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:42:26,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 00:42:26,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783950835] [2022-03-20 00:42:26,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:42:26,946 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 00:42:26,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:42:26,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 00:42:26,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:42:26,947 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 00:42:27,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:42:27,047 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-03-20 00:42:27,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 00:42:27,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-03-20 00:42:27,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:42:27,051 INFO L225 Difference]: With dead ends: 54 [2022-03-20 00:42:27,051 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 00:42:27,052 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 00:42:27,053 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:42:27,054 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 155 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:42:27,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 00:42:27,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-03-20 00:42:27,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 00:42:27,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-20 00:42:27,069 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-03-20 00:42:27,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:42:27,070 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-20 00:42:27,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 00:42:27,070 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-20 00:42:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 00:42:27,073 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:42:27,073 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-03-20 00:42:27,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 00:42:27,296 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:27,297 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:42:27,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:42:27,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1443363578, now seen corresponding path program 1 times [2022-03-20 00:42:27,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:42:27,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012384601] [2022-03-20 00:42:27,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:27,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:42:27,322 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:42:27,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626916203] [2022-03-20 00:42:27,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:27,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:27,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:42:27,324 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:42:27,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 00:42:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:42:27,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 00:42:27,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:42:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 00:42:27,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:42:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 00:42:27,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:42:27,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012384601] [2022-03-20 00:42:27,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:42:27,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626916203] [2022-03-20 00:42:27,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626916203] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 00:42:27,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:42:27,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 00:42:27,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441776992] [2022-03-20 00:42:27,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:42:27,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:42:27,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:42:27,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:42:27,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:42:27,845 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 00:42:27,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:42:27,888 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2022-03-20 00:42:27,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:42:27,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-03-20 00:42:27,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:42:27,889 INFO L225 Difference]: With dead ends: 53 [2022-03-20 00:42:27,890 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 00:42:27,890 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:42:27,891 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:42:27,891 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 161 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:42:27,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 00:42:27,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-20 00:42:27,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 00:42:27,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-20 00:42:27,901 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-03-20 00:42:27,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:42:27,902 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-20 00:42:27,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 00:42:27,902 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-20 00:42:27,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 00:42:27,903 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:42:27,903 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 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] [2022-03-20 00:42:27,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 00:42:28,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 00:42:28,128 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:42:28,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:42:28,128 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2022-03-20 00:42:28,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:42:28,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013154510] [2022-03-20 00:42:28,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:28,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:42:28,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:42:28,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405803759] [2022-03-20 00:42:28,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:28,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:28,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:42:28,145 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:42:28,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 00:42:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:42:28,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 00:42:28,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:42:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 00:42:28,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:42:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 00:42:28,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:42:28,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013154510] [2022-03-20 00:42:28,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:42:28,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405803759] [2022-03-20 00:42:28,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405803759] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:42:28,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:42:28,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 00:42:28,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503556078] [2022-03-20 00:42:28,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:42:28,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 00:42:28,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:42:28,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 00:42:28,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 00:42:28,396 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:42:28,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:42:28,566 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-03-20 00:42:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 00:42:28,567 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-20 00:42:28,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:42:28,571 INFO L225 Difference]: With dead ends: 103 [2022-03-20 00:42:28,571 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 00:42:28,571 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 00:42:28,574 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 58 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:42:28,577 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 295 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:42:28,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 00:42:28,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-03-20 00:42:28,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 00:42:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-03-20 00:42:28,605 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-03-20 00:42:28,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:42:28,605 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-03-20 00:42:28,606 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:42:28,606 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-03-20 00:42:28,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 00:42:28,608 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:42:28,608 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 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] [2022-03-20 00:42:28,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-20 00:42:28,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:28,824 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:42:28,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:42:28,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1286298951, now seen corresponding path program 1 times [2022-03-20 00:42:28,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:42:28,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351638012] [2022-03-20 00:42:28,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:28,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:42:28,837 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:42:28,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488254572] [2022-03-20 00:42:28,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:28,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:28,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:42:28,839 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:42:28,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 00:42:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:42:28,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 00:42:28,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:42:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 00:42:29,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:42:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 00:42:29,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:42:29,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351638012] [2022-03-20 00:42:29,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:42:29,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488254572] [2022-03-20 00:42:29,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488254572] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 00:42:29,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:42:29,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-03-20 00:42:29,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866336262] [2022-03-20 00:42:29,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:42:29,441 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 00:42:29,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:42:29,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 00:42:29,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-20 00:42:29,442 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 00:42:29,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:42:29,509 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2022-03-20 00:42:29,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 00:42:29,510 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-03-20 00:42:29,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:42:29,511 INFO L225 Difference]: With dead ends: 79 [2022-03-20 00:42:29,511 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 00:42:29,511 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-20 00:42:29,512 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 27 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:42:29,512 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 192 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:42:29,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 00:42:29,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-03-20 00:42:29,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 00:42:29,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-03-20 00:42:29,524 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-03-20 00:42:29,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:42:29,524 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-03-20 00:42:29,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 00:42:29,525 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-03-20 00:42:29,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 00:42:29,525 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:42:29,526 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:42:29,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 00:42:29,741 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:29,742 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:42:29,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:42:29,742 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2022-03-20 00:42:29,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:42:29,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804552442] [2022-03-20 00:42:29,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:29,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:42:29,756 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:42:29,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594242394] [2022-03-20 00:42:29,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:29,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:29,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:42:29,766 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:42:29,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 00:42:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:42:29,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 00:42:29,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:42:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 00:42:30,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:42:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 00:42:30,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:42:30,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804552442] [2022-03-20 00:42:30,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:42:30,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594242394] [2022-03-20 00:42:30,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594242394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:42:30,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:42:30,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-03-20 00:42:30,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752935392] [2022-03-20 00:42:30,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:42:30,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 00:42:30,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:42:30,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 00:42:30,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-20 00:42:30,317 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 00:42:30,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:42:30,747 INFO L93 Difference]: Finished difference Result 118 states and 159 transitions. [2022-03-20 00:42:30,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 00:42:30,747 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2022-03-20 00:42:30,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:42:30,749 INFO L225 Difference]: With dead ends: 118 [2022-03-20 00:42:30,749 INFO L226 Difference]: Without dead ends: 116 [2022-03-20 00:42:30,749 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-03-20 00:42:30,750 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 106 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 00:42:30,750 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 347 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 00:42:30,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-20 00:42:30,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-03-20 00:42:30,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 00:42:30,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2022-03-20 00:42:30,768 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2022-03-20 00:42:30,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:42:30,769 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2022-03-20 00:42:30,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 00:42:30,769 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2022-03-20 00:42:30,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 00:42:30,770 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:42:30,770 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 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] [2022-03-20 00:42:30,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 00:42:30,992 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:30,993 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:42:30,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:42:30,993 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2022-03-20 00:42:30,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:42:30,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102176865] [2022-03-20 00:42:30,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:30,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:42:31,004 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:42:31,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428291868] [2022-03-20 00:42:31,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:31,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:31,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:42:31,006 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:42:31,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 00:42:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:42:31,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:42:31,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:42:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 00:42:31,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:42:31,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:42:31,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102176865] [2022-03-20 00:42:31,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:42:31,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428291868] [2022-03-20 00:42:31,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428291868] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:42:31,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:42:31,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:42:31,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819694459] [2022-03-20 00:42:31,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:42:31,128 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:42:31,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:42:31,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:42:31,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:42:31,129 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 00:42:31,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:42:31,178 INFO L93 Difference]: Finished difference Result 151 states and 213 transitions. [2022-03-20 00:42:31,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:42:31,178 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-03-20 00:42:31,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:42:31,179 INFO L225 Difference]: With dead ends: 151 [2022-03-20 00:42:31,179 INFO L226 Difference]: Without dead ends: 149 [2022-03-20 00:42:31,180 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:42:31,180 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:42:31,181 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 151 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:42:31,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-20 00:42:31,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2022-03-20 00:42:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 89 states have internal predecessors, (113), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-03-20 00:42:31,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2022-03-20 00:42:31,206 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 47 [2022-03-20 00:42:31,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:42:31,207 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2022-03-20 00:42:31,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 00:42:31,207 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2022-03-20 00:42:31,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 00:42:31,208 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:42:31,208 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 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] [2022-03-20 00:42:31,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 00:42:31,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:31,427 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:42:31,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:42:31,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 1 times [2022-03-20 00:42:31,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:42:31,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798933986] [2022-03-20 00:42:31,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:31,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:42:31,438 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:42:31,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824201885] [2022-03-20 00:42:31,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:31,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:31,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:42:31,439 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:42:31,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 00:42:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:42:31,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 00:42:31,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:42:31,819 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 00:42:31,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:42:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 00:42:32,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:42:32,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798933986] [2022-03-20 00:42:32,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:42:32,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824201885] [2022-03-20 00:42:32,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824201885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:42:32,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:42:32,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2022-03-20 00:42:32,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029426353] [2022-03-20 00:42:32,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:42:32,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 00:42:32,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:42:32,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 00:42:32,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-20 00:42:32,063 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 00:42:34,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:42:34,944 INFO L93 Difference]: Finished difference Result 190 states and 265 transitions. [2022-03-20 00:42:34,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 00:42:34,944 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 47 [2022-03-20 00:42:34,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:42:34,947 INFO L225 Difference]: With dead ends: 190 [2022-03-20 00:42:34,947 INFO L226 Difference]: Without dead ends: 188 [2022-03-20 00:42:34,947 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 00:42:34,948 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 145 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 00:42:34,948 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 288 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 00:42:34,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-20 00:42:34,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 179. [2022-03-20 00:42:34,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 113 states have (on average 1.2566371681415929) internal successors, (142), 118 states have internal predecessors, (142), 56 states have call successors, (56), 10 states have call predecessors, (56), 9 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-20 00:42:34,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 252 transitions. [2022-03-20 00:42:34,983 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 252 transitions. Word has length 47 [2022-03-20 00:42:34,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:42:34,984 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 252 transitions. [2022-03-20 00:42:34,984 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 00:42:34,984 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 252 transitions. [2022-03-20 00:42:34,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 00:42:34,985 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:42:34,985 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:42:35,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 00:42:35,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:35,199 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:42:35,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:42:35,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 2 times [2022-03-20 00:42:35,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:42:35,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489819777] [2022-03-20 00:42:35,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:35,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:42:35,210 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:42:35,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505318416] [2022-03-20 00:42:35,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:42:35,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:35,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:42:35,214 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:42:35,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 00:42:35,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:42:35,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:42:35,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 00:42:35,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:42:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 00:42:35,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:42:35,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:42:35,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489819777] [2022-03-20 00:42:35,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:42:35,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505318416] [2022-03-20 00:42:35,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505318416] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:42:35,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:42:35,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:42:35,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398953302] [2022-03-20 00:42:35,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:42:35,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:42:35,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:42:35,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:42:35,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:42:35,334 INFO L87 Difference]: Start difference. First operand 179 states and 252 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 00:42:35,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:42:35,421 INFO L93 Difference]: Finished difference Result 225 states and 312 transitions. [2022-03-20 00:42:35,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 00:42:35,421 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-03-20 00:42:35,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:42:35,423 INFO L225 Difference]: With dead ends: 225 [2022-03-20 00:42:35,423 INFO L226 Difference]: Without dead ends: 144 [2022-03-20 00:42:35,424 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 00:42:35,424 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:42:35,424 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 180 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:42:35,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-20 00:42:35,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 121. [2022-03-20 00:42:35,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 38 states have call successors, (38), 10 states have call predecessors, (38), 9 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-20 00:42:35,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 160 transitions. [2022-03-20 00:42:35,450 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 160 transitions. Word has length 47 [2022-03-20 00:42:35,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:42:35,450 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 160 transitions. [2022-03-20 00:42:35,451 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 00:42:35,451 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 160 transitions. [2022-03-20 00:42:35,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 00:42:35,452 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:42:35,452 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1] [2022-03-20 00:42:35,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 00:42:35,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 00:42:35,672 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:42:35,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:42:35,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2022-03-20 00:42:35,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:42:35,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135597865] [2022-03-20 00:42:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:35,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:42:35,685 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:42:35,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194313556] [2022-03-20 00:42:35,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:35,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:35,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:42:35,689 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:42:35,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 00:42:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:42:35,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:42:35,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:42:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 00:42:35,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:42:35,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:42:35,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135597865] [2022-03-20 00:42:35,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:42:35,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194313556] [2022-03-20 00:42:35,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194313556] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:42:35,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:42:35,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:42:35,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889254729] [2022-03-20 00:42:35,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:42:35,841 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:42:35,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:42:35,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:42:35,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:42:35,842 INFO L87 Difference]: Start difference. First operand 121 states and 160 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 00:42:35,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:42:35,905 INFO L93 Difference]: Finished difference Result 167 states and 233 transitions. [2022-03-20 00:42:35,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:42:35,905 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-03-20 00:42:35,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:42:35,907 INFO L225 Difference]: With dead ends: 167 [2022-03-20 00:42:35,907 INFO L226 Difference]: Without dead ends: 165 [2022-03-20 00:42:35,907 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:42:35,908 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:42:35,908 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 162 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:42:35,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-20 00:42:35,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2022-03-20 00:42:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 80 states have (on average 1.1625) internal successors, (93), 88 states have internal predecessors, (93), 57 states have call successors, (57), 11 states have call predecessors, (57), 10 states have return successors, (55), 48 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 00:42:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 205 transitions. [2022-03-20 00:42:35,938 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 205 transitions. Word has length 52 [2022-03-20 00:42:35,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:42:35,939 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 205 transitions. [2022-03-20 00:42:35,939 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 00:42:35,939 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 205 transitions. [2022-03-20 00:42:35,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 00:42:35,940 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:42:35,940 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2022-03-20 00:42:35,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 00:42:36,159 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 00:42:36,159 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:42:36,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:42:36,160 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2022-03-20 00:42:36,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:42:36,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740701979] [2022-03-20 00:42:36,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:36,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:42:36,169 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:42:36,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237684787] [2022-03-20 00:42:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:36,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:36,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:42:36,173 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:42:36,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 00:42:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:42:36,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-20 00:42:36,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:42:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 00:42:36,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:42:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 00:42:37,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:42:37,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740701979] [2022-03-20 00:42:37,276 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:42:37,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237684787] [2022-03-20 00:42:37,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237684787] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:42:37,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:42:37,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-03-20 00:42:37,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928443832] [2022-03-20 00:42:37,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:42:37,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 00:42:37,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:42:37,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 00:42:37,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-20 00:42:37,279 INFO L87 Difference]: Start difference. First operand 148 states and 205 transitions. Second operand has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 00:42:43,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:42:43,277 INFO L93 Difference]: Finished difference Result 294 states and 426 transitions. [2022-03-20 00:42:43,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 00:42:43,277 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 64 [2022-03-20 00:42:43,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:42:43,281 INFO L225 Difference]: With dead ends: 294 [2022-03-20 00:42:43,281 INFO L226 Difference]: Without dead ends: 290 [2022-03-20 00:42:43,282 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 00:42:43,282 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 134 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-03-20 00:42:43,283 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 462 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-03-20 00:42:43,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-03-20 00:42:43,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 243. [2022-03-20 00:42:43,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 143 states have (on average 1.1888111888111887) internal successors, (170), 151 states have internal predecessors, (170), 85 states have call successors, (85), 15 states have call predecessors, (85), 14 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-20 00:42:43,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 338 transitions. [2022-03-20 00:42:43,352 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 338 transitions. Word has length 64 [2022-03-20 00:42:43,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:42:43,352 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 338 transitions. [2022-03-20 00:42:43,352 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 00:42:43,352 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 338 transitions. [2022-03-20 00:42:43,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 00:42:43,353 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:42:43,353 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:42:43,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 00:42:43,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 00:42:43,559 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:42:43,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:42:43,560 INFO L85 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 1 times [2022-03-20 00:42:43,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:42:43,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588366268] [2022-03-20 00:42:43,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:43,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:42:43,570 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:42:43,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839943982] [2022-03-20 00:42:43,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:43,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:43,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:42:43,572 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:42:43,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 00:42:43,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:42:43,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 00:42:43,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:42:43,790 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-20 00:42:43,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:42:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-20 00:42:43,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:42:43,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588366268] [2022-03-20 00:42:43,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:42:43,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839943982] [2022-03-20 00:42:43,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839943982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:42:43,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:42:43,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2022-03-20 00:42:43,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121087258] [2022-03-20 00:42:43,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:42:43,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 00:42:43,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:42:43,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 00:42:43,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:42:43,979 INFO L87 Difference]: Start difference. First operand 243 states and 338 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-03-20 00:42:44,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:42:44,246 INFO L93 Difference]: Finished difference Result 347 states and 502 transitions. [2022-03-20 00:42:44,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 00:42:44,246 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 74 [2022-03-20 00:42:44,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:42:44,249 INFO L225 Difference]: With dead ends: 347 [2022-03-20 00:42:44,249 INFO L226 Difference]: Without dead ends: 345 [2022-03-20 00:42:44,250 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 00:42:44,250 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 25 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 00:42:44,250 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 275 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 00:42:44,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-20 00:42:44,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 247. [2022-03-20 00:42:44,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 146 states have (on average 1.1849315068493151) internal successors, (173), 154 states have internal predecessors, (173), 85 states have call successors, (85), 16 states have call predecessors, (85), 15 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-20 00:42:44,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 341 transitions. [2022-03-20 00:42:44,311 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 341 transitions. Word has length 74 [2022-03-20 00:42:44,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:42:44,312 INFO L478 AbstractCegarLoop]: Abstraction has 247 states and 341 transitions. [2022-03-20 00:42:44,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-03-20 00:42:44,312 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 341 transitions. [2022-03-20 00:42:44,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 00:42:44,313 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:42:44,313 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 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] [2022-03-20 00:42:44,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 00:42:44,522 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 00:42:44,523 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:42:44,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:42:44,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 1 times [2022-03-20 00:42:44,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:42:44,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712036953] [2022-03-20 00:42:44,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:44,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:42:44,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:42:44,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [612007267] [2022-03-20 00:42:44,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:44,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:44,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:42:44,532 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:42:44,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 00:42:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:42:44,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 00:42:44,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:42:44,887 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-20 00:42:44,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:42:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-20 00:42:45,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:42:45,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712036953] [2022-03-20 00:42:45,069 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:42:45,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612007267] [2022-03-20 00:42:45,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612007267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:42:45,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:42:45,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-03-20 00:42:45,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511733052] [2022-03-20 00:42:45,070 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:42:45,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 00:42:45,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:42:45,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 00:42:45,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-20 00:42:45,071 INFO L87 Difference]: Start difference. First operand 247 states and 341 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 00:42:45,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:42:45,413 INFO L93 Difference]: Finished difference Result 323 states and 453 transitions. [2022-03-20 00:42:45,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 00:42:45,414 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 72 [2022-03-20 00:42:45,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:42:45,416 INFO L225 Difference]: With dead ends: 323 [2022-03-20 00:42:45,416 INFO L226 Difference]: Without dead ends: 321 [2022-03-20 00:42:45,416 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-03-20 00:42:45,417 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 80 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 00:42:45,417 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 294 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 00:42:45,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-03-20 00:42:45,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 259. [2022-03-20 00:42:45,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 155 states have (on average 1.1741935483870967) internal successors, (182), 163 states have internal predecessors, (182), 85 states have call successors, (85), 19 states have call predecessors, (85), 18 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-20 00:42:45,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 350 transitions. [2022-03-20 00:42:45,473 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 350 transitions. Word has length 72 [2022-03-20 00:42:45,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:42:45,473 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 350 transitions. [2022-03-20 00:42:45,473 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 00:42:45,473 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 350 transitions. [2022-03-20 00:42:45,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 00:42:45,474 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:42:45,474 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-03-20 00:42:45,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 00:42:45,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 00:42:45,687 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:42:45,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:42:45,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 2 times [2022-03-20 00:42:45,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:42:45,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747690441] [2022-03-20 00:42:45,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:45,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:42:45,696 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:42:45,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232271117] [2022-03-20 00:42:45,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:42:45,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:45,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:42:45,698 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) [2022-03-20 00:42:45,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 00:42:45,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:42:45,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:42:45,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 00:42:45,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:42:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 00:42:45,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:42:45,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:42:45,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747690441] [2022-03-20 00:42:45,846 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:42:45,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232271117] [2022-03-20 00:42:45,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232271117] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:42:45,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:42:45,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:42:45,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806704703] [2022-03-20 00:42:45,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:42:45,847 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:42:45,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:42:45,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:42:45,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:42:45,848 INFO L87 Difference]: Start difference. First operand 259 states and 350 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-20 00:42:45,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:42:45,961 INFO L93 Difference]: Finished difference Result 449 states and 606 transitions. [2022-03-20 00:42:45,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 00:42:45,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-03-20 00:42:45,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:42:45,963 INFO L225 Difference]: With dead ends: 449 [2022-03-20 00:42:45,963 INFO L226 Difference]: Without dead ends: 264 [2022-03-20 00:42:45,965 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:42:45,965 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:42:45,965 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 148 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:42:45,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-20 00:42:46,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 255. [2022-03-20 00:42:46,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 160 states have (on average 1.16875) internal successors, (187), 162 states have internal predecessors, (187), 77 states have call successors, (77), 18 states have call predecessors, (77), 17 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2022-03-20 00:42:46,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 339 transitions. [2022-03-20 00:42:46,036 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 339 transitions. Word has length 77 [2022-03-20 00:42:46,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:42:46,036 INFO L478 AbstractCegarLoop]: Abstraction has 255 states and 339 transitions. [2022-03-20 00:42:46,036 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-20 00:42:46,036 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 339 transitions. [2022-03-20 00:42:46,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 00:42:46,038 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:42:46,038 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-03-20 00:42:46,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-20 00:42:46,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 00:42:46,251 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:42:46,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:42:46,252 INFO L85 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 3 times [2022-03-20 00:42:46,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:42:46,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420756264] [2022-03-20 00:42:46,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:46,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:42:46,261 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:42:46,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172313796] [2022-03-20 00:42:46,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 00:42:46,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:46,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:42:46,263 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) [2022-03-20 00:42:46,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 00:42:46,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 00:42:46,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:42:46,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 00:42:46,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:42:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 32 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-20 00:42:47,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:42:48,696 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:42:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 00:42:54,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:42:54,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420756264] [2022-03-20 00:42:54,932 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:42:54,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172313796] [2022-03-20 00:42:54,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172313796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:42:54,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:42:54,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-03-20 00:42:54,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705271417] [2022-03-20 00:42:54,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:42:54,933 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 00:42:54,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:42:54,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 00:42:54,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-03-20 00:42:54,934 INFO L87 Difference]: Start difference. First operand 255 states and 339 transitions. Second operand has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 00:43:09,665 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:16,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:43:16,105 INFO L93 Difference]: Finished difference Result 379 states and 508 transitions. [2022-03-20 00:43:16,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 00:43:16,105 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 77 [2022-03-20 00:43:16,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:43:16,107 INFO L225 Difference]: With dead ends: 379 [2022-03-20 00:43:16,107 INFO L226 Difference]: Without dead ends: 377 [2022-03-20 00:43:16,109 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 145 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=840, Invalid=3716, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 00:43:16,109 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 271 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 463 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-03-20 00:43:16,109 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 634 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 1217 Invalid, 1 Unknown, 157 Unchecked, 5.6s Time] [2022-03-20 00:43:16,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-03-20 00:43:16,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 359. [2022-03-20 00:43:16,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 222 states have (on average 1.1711711711711712) internal successors, (260), 226 states have internal predecessors, (260), 113 states have call successors, (113), 24 states have call predecessors, (113), 23 states have return successors, (111), 108 states have call predecessors, (111), 111 states have call successors, (111) [2022-03-20 00:43:16,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 484 transitions. [2022-03-20 00:43:16,212 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 484 transitions. Word has length 77 [2022-03-20 00:43:16,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:43:16,212 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 484 transitions. [2022-03-20 00:43:16,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 00:43:16,212 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 484 transitions. [2022-03-20 00:43:16,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 00:43:16,213 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:43:16,213 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:43:16,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 00:43:16,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:43:16,436 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:43:16,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:43:16,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 1 times [2022-03-20 00:43:16,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:43:16,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471751741] [2022-03-20 00:43:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:43:16,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:43:16,444 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:43:16,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969166131] [2022-03-20 00:43:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:43:16,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:43:16,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:43:16,451 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) [2022-03-20 00:43:16,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 00:43:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:43:16,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-20 00:43:16,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:43:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 00:43:17,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:43:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-03-20 00:43:18,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:43:18,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471751741] [2022-03-20 00:43:18,240 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:43:18,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969166131] [2022-03-20 00:43:18,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969166131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:43:18,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:43:18,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2022-03-20 00:43:18,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230903500] [2022-03-20 00:43:18,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:43:18,240 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 00:43:18,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:43:18,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 00:43:18,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-03-20 00:43:18,241 INFO L87 Difference]: Start difference. First operand 359 states and 484 transitions. Second operand has 26 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 00:43:23,519 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:26,688 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:30,159 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:38,121 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:39,161 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:44,738 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:48,689 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:53,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:55,428 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:57,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:01,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:03,407 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:03,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:44:03,499 INFO L93 Difference]: Finished difference Result 617 states and 886 transitions. [2022-03-20 00:44:03,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 00:44:03,499 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 91 [2022-03-20 00:44:03,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:44:03,502 INFO L225 Difference]: With dead ends: 617 [2022-03-20 00:44:03,503 INFO L226 Difference]: Without dead ends: 613 [2022-03-20 00:44:03,504 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=849, Invalid=3707, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 00:44:03,504 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 158 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 407 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 1952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.2s IncrementalHoareTripleChecker+Time [2022-03-20 00:44:03,505 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 788 Invalid, 1952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 1537 Invalid, 8 Unknown, 0 Unchecked, 38.2s Time] [2022-03-20 00:44:03,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-03-20 00:44:03,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 505. [2022-03-20 00:44:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 302 states have (on average 1.1920529801324504) internal successors, (360), 306 states have internal predecessors, (360), 173 states have call successors, (173), 30 states have call predecessors, (173), 29 states have return successors, (171), 168 states have call predecessors, (171), 171 states have call successors, (171) [2022-03-20 00:44:03,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 704 transitions. [2022-03-20 00:44:03,692 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 704 transitions. Word has length 91 [2022-03-20 00:44:03,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:44:03,692 INFO L478 AbstractCegarLoop]: Abstraction has 505 states and 704 transitions. [2022-03-20 00:44:03,693 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 00:44:03,693 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 704 transitions. [2022-03-20 00:44:03,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 00:44:03,694 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:44:03,694 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:44:03,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 00:44:03,906 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 00:44:03,907 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:44:03,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:44:03,907 INFO L85 PathProgramCache]: Analyzing trace with hash -801999833, now seen corresponding path program 1 times [2022-03-20 00:44:03,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:44:03,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96860895] [2022-03-20 00:44:03,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:44:03,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:44:03,914 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:44:03,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138544914] [2022-03-20 00:44:03,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:44:03,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:44:03,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:44:03,916 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) [2022-03-20 00:44:03,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 00:44:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:44:03,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 00:44:03,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:44:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-20 00:44:04,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:44:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-20 00:44:04,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:44:04,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96860895] [2022-03-20 00:44:04,927 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:44:04,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138544914] [2022-03-20 00:44:04,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138544914] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:44:04,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:44:04,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 00:44:04,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208479269] [2022-03-20 00:44:04,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:44:04,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 00:44:04,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:44:04,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 00:44:04,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-03-20 00:44:04,928 INFO L87 Difference]: Start difference. First operand 505 states and 704 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 00:44:07,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:44:07,046 INFO L93 Difference]: Finished difference Result 1152 states and 1749 transitions. [2022-03-20 00:44:07,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 00:44:07,047 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 94 [2022-03-20 00:44:07,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:44:07,052 INFO L225 Difference]: With dead ends: 1152 [2022-03-20 00:44:07,053 INFO L226 Difference]: Without dead ends: 1150 [2022-03-20 00:44:07,053 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-03-20 00:44:07,054 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 95 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:44:07,054 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 434 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 00:44:07,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2022-03-20 00:44:07,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 1033. [2022-03-20 00:44:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 524 states have (on average 1.2881679389312977) internal successors, (675), 528 states have internal predecessors, (675), 473 states have call successors, (473), 36 states have call predecessors, (473), 35 states have return successors, (471), 468 states have call predecessors, (471), 471 states have call successors, (471) [2022-03-20 00:44:07,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1619 transitions. [2022-03-20 00:44:07,558 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1619 transitions. Word has length 94 [2022-03-20 00:44:07,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:44:07,558 INFO L478 AbstractCegarLoop]: Abstraction has 1033 states and 1619 transitions. [2022-03-20 00:44:07,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 00:44:07,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1619 transitions. [2022-03-20 00:44:07,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 00:44:07,560 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:44:07,560 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:44:07,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 00:44:07,773 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 00:44:07,773 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:44:07,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:44:07,774 INFO L85 PathProgramCache]: Analyzing trace with hash -568526404, now seen corresponding path program 2 times [2022-03-20 00:44:07,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:44:07,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605263063] [2022-03-20 00:44:07,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:44:07,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:44:07,780 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:44:07,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275930324] [2022-03-20 00:44:07,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:44:07,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:44:07,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:44:07,790 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) [2022-03-20 00:44:07,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 00:44:07,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:44:07,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:44:07,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 00:44:07,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:44:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-03-20 00:44:08,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:44:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-03-20 00:44:08,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:44:08,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605263063] [2022-03-20 00:44:08,152 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:44:08,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275930324] [2022-03-20 00:44:08,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275930324] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:44:08,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:44:08,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2022-03-20 00:44:08,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804520806] [2022-03-20 00:44:08,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:44:08,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 00:44:08,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:44:08,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 00:44:08,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:44:08,154 INFO L87 Difference]: Start difference. First operand 1033 states and 1619 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 00:44:09,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:44:09,035 INFO L93 Difference]: Finished difference Result 1217 states and 1901 transitions. [2022-03-20 00:44:09,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 00:44:09,036 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 99 [2022-03-20 00:44:09,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:44:09,041 INFO L225 Difference]: With dead ends: 1217 [2022-03-20 00:44:09,041 INFO L226 Difference]: Without dead ends: 1210 [2022-03-20 00:44:09,042 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-03-20 00:44:09,042 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 65 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 00:44:09,042 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 495 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 00:44:09,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2022-03-20 00:44:09,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1005. [2022-03-20 00:44:09,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 502 states have (on average 1.296812749003984) internal successors, (651), 505 states have internal predecessors, (651), 467 states have call successors, (467), 36 states have call predecessors, (467), 35 states have return successors, (465), 463 states have call predecessors, (465), 465 states have call successors, (465) [2022-03-20 00:44:09,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1583 transitions. [2022-03-20 00:44:09,533 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1583 transitions. Word has length 99 [2022-03-20 00:44:09,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:44:09,533 INFO L478 AbstractCegarLoop]: Abstraction has 1005 states and 1583 transitions. [2022-03-20 00:44:09,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 00:44:09,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1583 transitions. [2022-03-20 00:44:09,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-20 00:44:09,535 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:44:09,535 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:44:09,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 00:44:09,758 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 00:44:09,758 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:44:09,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:44:09,759 INFO L85 PathProgramCache]: Analyzing trace with hash -851432394, now seen corresponding path program 1 times [2022-03-20 00:44:09,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:44:09,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064263753] [2022-03-20 00:44:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:44:09,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:44:09,766 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:44:09,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911411040] [2022-03-20 00:44:09,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:44:09,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:44:09,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:44:09,768 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) [2022-03-20 00:44:09,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 00:44:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:44:09,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 00:44:09,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:44:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 71 proven. 87 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-03-20 00:44:10,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:44:11,494 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:44:15,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:44:15,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064263753] [2022-03-20 00:44:15,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:44:15,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911411040] [2022-03-20 00:44:15,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911411040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 00:44:15,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:44:15,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 00:44:15,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236970122] [2022-03-20 00:44:15,932 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 00:44:15,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 00:44:15,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:44:15,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 00:44:15,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=492, Unknown=2, NotChecked=0, Total=600 [2022-03-20 00:44:15,933 INFO L87 Difference]: Start difference. First operand 1005 states and 1583 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 00:44:17,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:44:17,380 INFO L93 Difference]: Finished difference Result 1169 states and 1837 transitions. [2022-03-20 00:44:17,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 00:44:17,380 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 119 [2022-03-20 00:44:17,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:44:17,386 INFO L225 Difference]: With dead ends: 1169 [2022-03-20 00:44:17,386 INFO L226 Difference]: Without dead ends: 1167 [2022-03-20 00:44:17,388 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=204, Invalid=916, Unknown=2, NotChecked=0, Total=1122 [2022-03-20 00:44:17,389 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 59 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 00:44:17,389 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 489 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 00:44:17,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2022-03-20 00:44:17,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1156. [2022-03-20 00:44:17,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 576 states have (on average 1.2986111111111112) internal successors, (748), 579 states have internal predecessors, (748), 539 states have call successors, (539), 41 states have call predecessors, (539), 40 states have return successors, (537), 535 states have call predecessors, (537), 537 states have call successors, (537) [2022-03-20 00:44:17,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1824 transitions. [2022-03-20 00:44:17,965 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1824 transitions. Word has length 119 [2022-03-20 00:44:17,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:44:17,965 INFO L478 AbstractCegarLoop]: Abstraction has 1156 states and 1824 transitions. [2022-03-20 00:44:17,965 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 00:44:17,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1824 transitions. [2022-03-20 00:44:17,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 00:44:17,967 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:44:17,967 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:44:17,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 00:44:18,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:44:18,183 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:44:18,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:44:18,184 INFO L85 PathProgramCache]: Analyzing trace with hash 65157230, now seen corresponding path program 2 times [2022-03-20 00:44:18,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:44:18,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11830962] [2022-03-20 00:44:18,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:44:18,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:44:18,192 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:44:18,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948053135] [2022-03-20 00:44:18,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:44:18,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:44:18,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:44:18,194 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) [2022-03-20 00:44:18,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 00:44:18,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:44:18,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:44:18,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-20 00:44:18,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:44:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 111 proven. 90 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-03-20 00:44:19,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:44:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 146 proven. 19 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-03-20 00:44:21,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:44:21,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11830962] [2022-03-20 00:44:21,708 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:44:21,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948053135] [2022-03-20 00:44:21,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948053135] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:44:21,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:44:21,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 28 [2022-03-20 00:44:21,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562573405] [2022-03-20 00:44:21,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:44:21,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 00:44:21,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:44:21,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 00:44:21,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-03-20 00:44:21,712 INFO L87 Difference]: Start difference. First operand 1156 states and 1824 transitions. Second operand has 28 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 13 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 11 states have call successors, (31) [2022-03-20 00:44:25,759 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:27,421 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:30,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:33,379 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:36,545 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:41,083 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:41,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:44:41,498 INFO L93 Difference]: Finished difference Result 1347 states and 2108 transitions. [2022-03-20 00:44:41,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 00:44:41,499 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 13 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 11 states have call successors, (31) Word has length 124 [2022-03-20 00:44:41,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:44:41,504 INFO L225 Difference]: With dead ends: 1347 [2022-03-20 00:44:41,504 INFO L226 Difference]: Without dead ends: 1345 [2022-03-20 00:44:41,505 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 225 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=396, Invalid=1766, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 00:44:41,506 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 111 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 310 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2022-03-20 00:44:41,506 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 715 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 1266 Invalid, 4 Unknown, 0 Unchecked, 18.4s Time] [2022-03-20 00:44:41,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2022-03-20 00:44:42,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1308. [2022-03-20 00:44:42,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 650 states have (on average 1.3) internal successors, (845), 653 states have internal predecessors, (845), 611 states have call successors, (611), 47 states have call predecessors, (611), 46 states have return successors, (609), 607 states have call predecessors, (609), 609 states have call successors, (609) [2022-03-20 00:44:42,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 2065 transitions. [2022-03-20 00:44:42,101 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 2065 transitions. Word has length 124 [2022-03-20 00:44:42,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:44:42,102 INFO L478 AbstractCegarLoop]: Abstraction has 1308 states and 2065 transitions. [2022-03-20 00:44:42,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 13 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 11 states have call successors, (31) [2022-03-20 00:44:42,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 2065 transitions. [2022-03-20 00:44:42,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 00:44:42,107 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:44:42,108 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:44:42,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 00:44:42,321 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:44:42,321 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:44:42,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:44:42,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1937049344, now seen corresponding path program 2 times [2022-03-20 00:44:42,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:44:42,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762002356] [2022-03-20 00:44:42,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:44:42,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:44:42,330 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:44:42,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616190857] [2022-03-20 00:44:42,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:44:42,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:44:42,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:44:42,332 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) [2022-03-20 00:44:42,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 00:44:42,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:44:42,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:44:42,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-20 00:44:42,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:44:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 126 proven. 127 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-03-20 00:44:43,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:44:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 160 proven. 41 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-03-20 00:44:49,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:44:49,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762002356] [2022-03-20 00:44:49,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:44:49,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616190857] [2022-03-20 00:44:49,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616190857] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:44:49,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:44:49,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 32 [2022-03-20 00:44:49,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724849365] [2022-03-20 00:44:49,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:44:49,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 00:44:49,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:44:49,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 00:44:49,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-03-20 00:44:49,628 INFO L87 Difference]: Start difference. First operand 1308 states and 2065 transitions. Second operand has 32 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 15 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2022-03-20 00:44:56,909 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:00,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:04,476 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:07,477 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:11,894 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:16,830 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:18,835 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:24,710 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:26,716 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:30,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:51,078 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:53,085 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:56,821 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:58,866 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:01,584 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:06,772 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:08,778 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:18,937 WARN L232 SmtUtils]: Spent 5.53s on a formula simplification. DAG size of input: 102 DAG size of output: 99 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:46:24,640 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:27,580 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:32,097 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:33,793 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:35,796 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:38,575 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:40,447 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:49,425 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:56,613 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.78s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:59,798 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.83s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:47:02,558 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.67s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:47:10,780 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:47:14,441 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:47:19,272 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.45s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:47:21,279 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:47:32,764 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:47:35,847 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:47:38,624 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:47:44,903 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:47:46,906 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:47:52,607 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:47:56,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:47:58,537 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:02,203 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.27s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:05,103 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.59s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:07,226 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:11,054 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:12,806 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:16,582 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:18,588 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:19,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:48:19,234 INFO L93 Difference]: Finished difference Result 2374 states and 3852 transitions. [2022-03-20 00:48:19,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-20 00:48:19,235 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 15 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) Word has length 138 [2022-03-20 00:48:19,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:48:19,246 INFO L225 Difference]: With dead ends: 2374 [2022-03-20 00:48:19,246 INFO L226 Difference]: Without dead ends: 2366 [2022-03-20 00:48:19,249 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 259 SyntacticMatches, 7 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 61.9s TimeCoverageRelationStatistics Valid=1850, Invalid=9922, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 00:48:19,250 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 201 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 2835 mSolverCounterSat, 704 mSolverCounterUnsat, 40 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 151.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 3579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 704 IncrementalHoareTripleChecker+Valid, 2835 IncrementalHoareTripleChecker+Invalid, 40 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 151.7s IncrementalHoareTripleChecker+Time [2022-03-20 00:48:19,250 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1242 Invalid, 3579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [704 Valid, 2835 Invalid, 40 Unknown, 0 Unchecked, 151.7s Time] [2022-03-20 00:48:19,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2366 states. [2022-03-20 00:48:20,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2366 to 2069. [2022-03-20 00:48:20,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 954 states have (on average 1.3385744234800838) internal successors, (1277), 957 states have internal predecessors, (1277), 1059 states have call successors, (1059), 56 states have call predecessors, (1059), 55 states have return successors, (1057), 1055 states have call predecessors, (1057), 1057 states have call successors, (1057) [2022-03-20 00:48:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 3393 transitions. [2022-03-20 00:48:20,586 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 3393 transitions. Word has length 138 [2022-03-20 00:48:20,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:48:20,587 INFO L478 AbstractCegarLoop]: Abstraction has 2069 states and 3393 transitions. [2022-03-20 00:48:20,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 15 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2022-03-20 00:48:20,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 3393 transitions. [2022-03-20 00:48:20,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-20 00:48:20,589 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:48:20,590 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:48:20,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 00:48:20,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 00:48:20,811 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:48:20,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:48:20,811 INFO L85 PathProgramCache]: Analyzing trace with hash -20730755, now seen corresponding path program 3 times [2022-03-20 00:48:20,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:48:20,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210071910] [2022-03-20 00:48:20,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:48:20,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:48:20,821 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:48:20,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485242917] [2022-03-20 00:48:20,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 00:48:20,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:48:20,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:48:20,823 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) [2022-03-20 00:48:20,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 00:48:21,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-20 00:48:21,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:48:21,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-20 00:48:21,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:48:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 32 proven. 75 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-03-20 00:48:22,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:48:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-03-20 00:48:27,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:48:27,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210071910] [2022-03-20 00:48:27,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:48:27,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485242917] [2022-03-20 00:48:27,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485242917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:48:27,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:48:27,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 37 [2022-03-20 00:48:27,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234010040] [2022-03-20 00:48:27,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:48:27,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 00:48:27,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:48:27,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 00:48:27,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1126, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 00:48:27,571 INFO L87 Difference]: Start difference. First operand 2069 states and 3393 transitions. Second operand has 37 states, 35 states have (on average 2.2) internal successors, (77), 36 states have internal predecessors, (77), 12 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 10 states have call predecessors, (41), 10 states have call successors, (41) [2022-03-20 00:48:40,905 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:49:39,596 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:49:58,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:49:58,001 INFO L93 Difference]: Finished difference Result 3281 states and 5391 transitions. [2022-03-20 00:49:58,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-03-20 00:49:58,004 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.2) internal successors, (77), 36 states have internal predecessors, (77), 12 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 10 states have call predecessors, (41), 10 states have call successors, (41) Word has length 141 [2022-03-20 00:49:58,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:49:58,016 INFO L225 Difference]: With dead ends: 3281 [2022-03-20 00:49:58,016 INFO L226 Difference]: Without dead ends: 3273 [2022-03-20 00:49:58,021 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 243 SyntacticMatches, 3 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8799 ImplicationChecksByTransitivity, 63.0s TimeCoverageRelationStatistics Valid=4107, Invalid=21333, Unknown=0, NotChecked=0, Total=25440 [2022-03-20 00:49:58,022 INFO L913 BasicCegarLoop]: 146 mSDtfsCounter, 430 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 3221 mSolverCounterSat, 1416 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 1654 SdHoareTripleChecker+Invalid, 4639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1416 IncrementalHoareTripleChecker+Valid, 3221 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:49:58,022 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 1654 Invalid, 4639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1416 Valid, 3221 Invalid, 2 Unknown, 0 Unchecked, 29.0s Time] [2022-03-20 00:49:58,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2022-03-20 00:49:59,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2449. [2022-03-20 00:49:59,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2449 states, 1145 states have (on average 1.3327510917030567) internal successors, (1526), 1150 states have internal predecessors, (1526), 1243 states have call successors, (1243), 61 states have call predecessors, (1243), 60 states have return successors, (1241), 1237 states have call predecessors, (1241), 1241 states have call successors, (1241) [2022-03-20 00:49:59,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2449 states to 2449 states and 4010 transitions. [2022-03-20 00:49:59,876 INFO L78 Accepts]: Start accepts. Automaton has 2449 states and 4010 transitions. Word has length 141 [2022-03-20 00:49:59,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:49:59,877 INFO L478 AbstractCegarLoop]: Abstraction has 2449 states and 4010 transitions. [2022-03-20 00:49:59,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.2) internal successors, (77), 36 states have internal predecessors, (77), 12 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 10 states have call predecessors, (41), 10 states have call successors, (41) [2022-03-20 00:49:59,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2449 states and 4010 transitions. [2022-03-20 00:49:59,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-03-20 00:49:59,881 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:49:59,881 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:49:59,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 00:50:00,104 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 00:50:00,104 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:50:00,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:50:00,104 INFO L85 PathProgramCache]: Analyzing trace with hash -241114114, now seen corresponding path program 4 times [2022-03-20 00:50:00,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:50:00,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838070044] [2022-03-20 00:50:00,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:50:00,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:50:00,112 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:50:00,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310538691] [2022-03-20 00:50:00,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 00:50:00,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:50:00,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:50:00,114 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) [2022-03-20 00:50:00,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 00:50:00,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 00:50:00,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:50:00,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 123 conjunts are in the unsatisfiable core [2022-03-20 00:50:00,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:50:04,904 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:50:05,547 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 180 proven. 160 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2022-03-20 00:50:05,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:50:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 225 proven. 12 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2022-03-20 00:50:08,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:50:08,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838070044] [2022-03-20 00:50:08,788 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:50:08,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310538691] [2022-03-20 00:50:08,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310538691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:50:08,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:50:08,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13] total 32 [2022-03-20 00:50:08,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611159406] [2022-03-20 00:50:08,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:50:08,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 00:50:08,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:50:08,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 00:50:08,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2022-03-20 00:50:08,790 INFO L87 Difference]: Start difference. First operand 2449 states and 4010 transitions. Second operand has 32 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 29 states have internal predecessors, (75), 13 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 10 states have call predecessors, (33), 11 states have call successors, (33) [2022-03-20 00:50:13,397 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:50:16,060 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:50:21,235 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:50:29,368 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.73s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:50:38,476 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:50:41,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:50:41,399 INFO L93 Difference]: Finished difference Result 2863 states and 4669 transitions. [2022-03-20 00:50:41,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 00:50:41,401 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 29 states have internal predecessors, (75), 13 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 10 states have call predecessors, (33), 11 states have call successors, (33) Word has length 168 [2022-03-20 00:50:41,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:50:41,410 INFO L225 Difference]: With dead ends: 2863 [2022-03-20 00:50:41,410 INFO L226 Difference]: Without dead ends: 2855 [2022-03-20 00:50:41,411 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 301 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=647, Invalid=4323, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 00:50:41,411 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 240 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 2762 mSolverCounterSat, 628 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 3394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 2762 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:50:41,412 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 881 Invalid, 3394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 2762 Invalid, 4 Unknown, 0 Unchecked, 19.0s Time] [2022-03-20 00:50:41,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2855 states. [2022-03-20 00:50:43,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2855 to 2584. [2022-03-20 00:50:43,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2584 states, 1179 states have (on average 1.3460559796437659) internal successors, (1587), 1182 states have internal predecessors, (1587), 1339 states have call successors, (1339), 66 states have call predecessors, (1339), 65 states have return successors, (1337), 1335 states have call predecessors, (1337), 1337 states have call successors, (1337) [2022-03-20 00:50:43,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2584 states to 2584 states and 4263 transitions. [2022-03-20 00:50:43,322 INFO L78 Accepts]: Start accepts. Automaton has 2584 states and 4263 transitions. Word has length 168 [2022-03-20 00:50:43,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:50:43,322 INFO L478 AbstractCegarLoop]: Abstraction has 2584 states and 4263 transitions. [2022-03-20 00:50:43,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 29 states have internal predecessors, (75), 13 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 10 states have call predecessors, (33), 11 states have call successors, (33) [2022-03-20 00:50:43,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2584 states and 4263 transitions. [2022-03-20 00:50:43,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-20 00:50:43,327 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:50:43,327 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:50:43,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 00:50:43,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:50:43,551 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:50:43,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:50:43,552 INFO L85 PathProgramCache]: Analyzing trace with hash 409843945, now seen corresponding path program 3 times [2022-03-20 00:50:43,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:50:43,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753174343] [2022-03-20 00:50:43,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:50:43,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:50:43,564 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:50:43,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262336901] [2022-03-20 00:50:43,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 00:50:43,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:50:43,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:50:43,565 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) [2022-03-20 00:50:43,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 00:50:43,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 00:50:43,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:50:43,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 00:50:43,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:50:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 154 proven. 33 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2022-03-20 00:50:43,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:50:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 124 proven. 12 refuted. 0 times theorem prover too weak. 1362 trivial. 0 not checked. [2022-03-20 00:50:44,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:50:44,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753174343] [2022-03-20 00:50:44,281 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:50:44,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262336901] [2022-03-20 00:50:44,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262336901] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:50:44,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:50:44,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-03-20 00:50:44,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776411982] [2022-03-20 00:50:44,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:50:44,282 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 00:50:44,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:50:44,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 00:50:44,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-20 00:50:44,282 INFO L87 Difference]: Start difference. First operand 2584 states and 4263 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2022-03-20 00:50:47,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:50:47,618 INFO L93 Difference]: Finished difference Result 3715 states and 6210 transitions. [2022-03-20 00:50:47,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 00:50:47,619 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) Word has length 187 [2022-03-20 00:50:47,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:50:47,633 INFO L225 Difference]: With dead ends: 3715 [2022-03-20 00:50:47,634 INFO L226 Difference]: Without dead ends: 3711 [2022-03-20 00:50:47,635 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 362 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-03-20 00:50:47,635 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 23 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 00:50:47,635 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 293 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 00:50:47,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3711 states. [2022-03-20 00:50:49,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3711 to 2347. [2022-03-20 00:50:49,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 1084 states have (on average 1.3367158671586716) internal successors, (1449), 1086 states have internal predecessors, (1449), 1199 states have call successors, (1199), 65 states have call predecessors, (1199), 63 states have return successors, (1197), 1195 states have call predecessors, (1197), 1197 states have call successors, (1197) [2022-03-20 00:50:49,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 3845 transitions. [2022-03-20 00:50:49,620 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 3845 transitions. Word has length 187 [2022-03-20 00:50:49,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:50:49,621 INFO L478 AbstractCegarLoop]: Abstraction has 2347 states and 3845 transitions. [2022-03-20 00:50:49,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2022-03-20 00:50:49,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 3845 transitions. [2022-03-20 00:50:49,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-03-20 00:50:49,625 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:50:49,625 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 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] [2022-03-20 00:50:49,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 00:50:49,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:50:49,847 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:50:49,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:50:49,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1315679615, now seen corresponding path program 5 times [2022-03-20 00:50:49,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:50:49,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637921906] [2022-03-20 00:50:49,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:50:49,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:50:49,863 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:50:49,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374069658] [2022-03-20 00:50:49,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 00:50:49,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:50:49,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:50:49,867 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:50:49,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 00:50:49,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-20 00:50:49,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:50:49,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 00:50:49,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:50:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1314 backedges. 639 proven. 18 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2022-03-20 00:50:50,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:50:50,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1314 backedges. 143 proven. 18 refuted. 0 times theorem prover too weak. 1153 trivial. 0 not checked. [2022-03-20 00:50:50,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:50:50,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637921906] [2022-03-20 00:50:50,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:50:50,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374069658] [2022-03-20 00:50:50,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374069658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:50:50,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:50:50,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-03-20 00:50:50,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897357000] [2022-03-20 00:50:50,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:50:50,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 00:50:50,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:50:50,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 00:50:50,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 00:50:50,484 INFO L87 Difference]: Start difference. First operand 2347 states and 3845 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2022-03-20 00:50:52,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:50:52,607 INFO L93 Difference]: Finished difference Result 3725 states and 6082 transitions. [2022-03-20 00:50:52,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 00:50:52,608 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), 5 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) Word has length 190 [2022-03-20 00:50:52,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:50:52,619 INFO L225 Difference]: With dead ends: 3725 [2022-03-20 00:50:52,619 INFO L226 Difference]: Without dead ends: 2509 [2022-03-20 00:50:52,623 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 371 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-20 00:50:52,624 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 9 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 00:50:52,624 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 337 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 00:50:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2022-03-20 00:50:54,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 2363. [2022-03-20 00:50:54,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2363 states, 1113 states have (on average 1.3234501347708896) internal successors, (1473), 1134 states have internal predecessors, (1473), 1187 states have call successors, (1187), 64 states have call predecessors, (1187), 62 states have return successors, (1185), 1164 states have call predecessors, (1185), 1185 states have call successors, (1185) [2022-03-20 00:50:54,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2363 states to 2363 states and 3845 transitions. [2022-03-20 00:50:54,483 INFO L78 Accepts]: Start accepts. Automaton has 2363 states and 3845 transitions. Word has length 190 [2022-03-20 00:50:54,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:50:54,483 INFO L478 AbstractCegarLoop]: Abstraction has 2363 states and 3845 transitions. [2022-03-20 00:50:54,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2022-03-20 00:50:54,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2363 states and 3845 transitions. [2022-03-20 00:50:54,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-03-20 00:50:54,489 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:50:54,489 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:50:54,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 00:50:54,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 00:50:54,711 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:50:54,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:50:54,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1359987491, now seen corresponding path program 6 times [2022-03-20 00:50:54,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:50:54,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968582734] [2022-03-20 00:50:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:50:54,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:50:54,724 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:50:54,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711591470] [2022-03-20 00:50:54,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 00:50:54,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:50:54,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:50:54,726 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:50:54,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 00:50:54,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 00:50:54,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:50:54,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-20 00:50:54,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:51:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1738 backedges. 171 proven. 184 refuted. 0 times theorem prover too weak. 1383 trivial. 0 not checked. [2022-03-20 00:51:11,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:51:13,454 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:51:18,193 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:51:25,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:51:25,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968582734] [2022-03-20 00:51:25,125 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:51:25,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711591470] [2022-03-20 00:51:25,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711591470] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 00:51:25,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:51:25,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-03-20 00:51:25,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109440355] [2022-03-20 00:51:25,125 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 00:51:25,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 00:51:25,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:51:25,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 00:51:25,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 00:51:25,126 INFO L87 Difference]: Start difference. First operand 2363 states and 3845 transitions. Second operand has 28 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 25 states have internal predecessors, (50), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2022-03-20 00:51:38,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:51:38,631 INFO L93 Difference]: Finished difference Result 3119 states and 5069 transitions. [2022-03-20 00:51:38,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 00:51:38,633 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 25 states have internal predecessors, (50), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) Word has length 204 [2022-03-20 00:51:38,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:51:38,642 INFO L225 Difference]: With dead ends: 3119 [2022-03-20 00:51:38,642 INFO L226 Difference]: Without dead ends: 2628 [2022-03-20 00:51:38,645 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=449, Invalid=2857, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 00:51:38,645 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 90 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 1714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:51:38,645 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 922 Invalid, 1714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1590 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-20 00:51:38,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2022-03-20 00:51:40,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 2568. [2022-03-20 00:51:40,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 1193 states have (on average 1.3260687342833193) internal successors, (1582), 1213 states have internal predecessors, (1582), 1307 states have call successors, (1307), 69 states have call predecessors, (1307), 67 states have return successors, (1305), 1285 states have call predecessors, (1305), 1305 states have call successors, (1305) [2022-03-20 00:51:40,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 4194 transitions. [2022-03-20 00:51:40,792 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 4194 transitions. Word has length 204 [2022-03-20 00:51:40,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:51:40,793 INFO L478 AbstractCegarLoop]: Abstraction has 2568 states and 4194 transitions. [2022-03-20 00:51:40,793 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 25 states have internal predecessors, (50), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2022-03-20 00:51:40,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 4194 transitions. [2022-03-20 00:51:40,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-03-20 00:51:40,798 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:51:40,798 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 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] [2022-03-20 00:51:40,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 00:51:41,021 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 00:51:41,021 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:51:41,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:51:41,022 INFO L85 PathProgramCache]: Analyzing trace with hash -190578708, now seen corresponding path program 7 times [2022-03-20 00:51:41,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:51:41,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694993859] [2022-03-20 00:51:41,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:51:41,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:51:41,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:51:41,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551538149] [2022-03-20 00:51:41,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 00:51:41,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:51:41,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:51:41,036 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:51:41,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 00:51:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:51:41,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 00:51:41,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:51:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 530 proven. 85 refuted. 0 times theorem prover too weak. 1151 trivial. 0 not checked. [2022-03-20 00:51:41,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:51:44,316 WARN L833 $PredicateComparison]: unable to prove that (forall ((aux_div_aux_div_aux_div_aux_div_v_main_~b~0_84_43_43_54_69 Int)) (or (<= (+ c_main_~c~0 aux_div_aux_div_aux_div_aux_div_v_main_~b~0_84_43_43_54_69) (+ c_main_~b~0 2)) (<= (div (* (- 1) (div (* (- 1) (div (+ c_main_~b~0 (* (- 17) aux_div_aux_div_aux_div_aux_div_v_main_~b~0_84_43_43_54_69) 35) (- 2))) (- 2))) (- 2)) 0) (<= 1 (+ (* 2 aux_div_aux_div_aux_div_aux_div_v_main_~b~0_84_43_43_54_69) (div (+ (- 1) (div (+ (- 1) (div (+ (* (- 1) c_main_~c~0) (- 35)) 2)) 2)) 2))))) is different from false [2022-03-20 00:51:44,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:51:44,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694993859] [2022-03-20 00:51:44,918 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:51:44,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551538149] [2022-03-20 00:51:44,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551538149] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 00:51:44,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:51:44,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-20 00:51:44,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447509343] [2022-03-20 00:51:44,918 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 00:51:44,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 00:51:44,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:51:44,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 00:51:44,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=889, Unknown=1, NotChecked=60, Total=1056 [2022-03-20 00:51:44,920 INFO L87 Difference]: Start difference. First operand 2568 states and 4194 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) [2022-03-20 00:51:49,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:51:49,378 INFO L93 Difference]: Finished difference Result 3194 states and 5195 transitions. [2022-03-20 00:51:49,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 00:51:49,379 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) Word has length 212 [2022-03-20 00:51:49,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:51:49,387 INFO L225 Difference]: With dead ends: 3194 [2022-03-20 00:51:49,387 INFO L226 Difference]: Without dead ends: 2891 [2022-03-20 00:51:49,389 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=886, Invalid=3673, Unknown=1, NotChecked=132, Total=4692 [2022-03-20 00:51:49,390 INFO L913 BasicCegarLoop]: 113 mSDtfsCounter, 124 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 00:51:49,390 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 1170 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 00:51:49,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2891 states. [2022-03-20 00:51:51,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2891 to 2836. [2022-03-20 00:51:51,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2836 states, 1310 states have (on average 1.3305343511450383) internal successors, (1743), 1332 states have internal predecessors, (1743), 1458 states have call successors, (1458), 69 states have call predecessors, (1458), 67 states have return successors, (1456), 1434 states have call predecessors, (1456), 1456 states have call successors, (1456) [2022-03-20 00:51:51,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2836 states to 2836 states and 4657 transitions. [2022-03-20 00:51:51,657 INFO L78 Accepts]: Start accepts. Automaton has 2836 states and 4657 transitions. Word has length 212 [2022-03-20 00:51:51,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:51:51,658 INFO L478 AbstractCegarLoop]: Abstraction has 2836 states and 4657 transitions. [2022-03-20 00:51:51,658 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) [2022-03-20 00:51:51,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2836 states and 4657 transitions. [2022-03-20 00:51:51,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-03-20 00:51:51,663 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:51:51,663 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:51:51,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 00:51:51,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 00:51:51,888 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:51:51,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:51:51,888 INFO L85 PathProgramCache]: Analyzing trace with hash -397503446, now seen corresponding path program 8 times [2022-03-20 00:51:51,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:51:51,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248622805] [2022-03-20 00:51:51,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:51:51,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:51:51,900 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:51:51,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1084670770] [2022-03-20 00:51:51,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:51:51,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:51:51,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:51:51,901 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:51:51,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 00:51:51,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:51:51,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:51:51,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 00:51:51,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:51:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1789 backedges. 550 proven. 88 refuted. 0 times theorem prover too weak. 1151 trivial. 0 not checked. [2022-03-20 00:51:52,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:52:18,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:52:18,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248622805] [2022-03-20 00:52:18,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:52:18,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084670770] [2022-03-20 00:52:18,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084670770] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 00:52:18,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:52:18,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-20 00:52:18,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810897845] [2022-03-20 00:52:18,206 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 00:52:18,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 00:52:18,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:52:18,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 00:52:18,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=997, Unknown=14, NotChecked=0, Total=1122 [2022-03-20 00:52:18,207 INFO L87 Difference]: Start difference. First operand 2836 states and 4657 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) [2022-03-20 00:52:23,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:52:23,442 INFO L93 Difference]: Finished difference Result 3381 states and 5476 transitions. [2022-03-20 00:52:23,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 00:52:23,443 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) Word has length 217 [2022-03-20 00:52:23,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:52:23,452 INFO L225 Difference]: With dead ends: 3381 [2022-03-20 00:52:23,452 INFO L226 Difference]: Without dead ends: 3078 [2022-03-20 00:52:23,454 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=1324, Invalid=5468, Unknown=14, NotChecked=0, Total=6806 [2022-03-20 00:52:23,455 INFO L913 BasicCegarLoop]: 137 mSDtfsCounter, 181 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 00:52:23,455 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1015 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 00:52:23,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2022-03-20 00:52:25,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 2947. [2022-03-20 00:52:25,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2947 states, 1362 states have (on average 1.330396475770925) internal successors, (1812), 1385 states have internal predecessors, (1812), 1517 states have call successors, (1517), 69 states have call predecessors, (1517), 67 states have return successors, (1515), 1492 states have call predecessors, (1515), 1515 states have call successors, (1515) [2022-03-20 00:52:25,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2947 states to 2947 states and 4844 transitions. [2022-03-20 00:52:25,817 INFO L78 Accepts]: Start accepts. Automaton has 2947 states and 4844 transitions. Word has length 217 [2022-03-20 00:52:25,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:52:25,817 INFO L478 AbstractCegarLoop]: Abstraction has 2947 states and 4844 transitions. [2022-03-20 00:52:25,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) [2022-03-20 00:52:25,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2947 states and 4844 transitions. [2022-03-20 00:52:25,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-03-20 00:52:25,825 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:52:25,825 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:52:25,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 00:52:26,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 00:52:26,039 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:52:26,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:52:26,040 INFO L85 PathProgramCache]: Analyzing trace with hash -2052476587, now seen corresponding path program 9 times [2022-03-20 00:52:26,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:52:26,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776319683] [2022-03-20 00:52:26,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:52:26,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:52:26,050 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:52:26,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562478397] [2022-03-20 00:52:26,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 00:52:26,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:52:26,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:52:26,051 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:52:26,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 00:52:26,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-20 00:52:26,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:52:26,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 00:52:26,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:52:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 125 proven. 122 refuted. 0 times theorem prover too weak. 2023 trivial. 0 not checked. [2022-03-20 00:52:27,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:52:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 66 proven. 181 refuted. 0 times theorem prover too weak. 2023 trivial. 0 not checked. [2022-03-20 00:52:28,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:52:28,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776319683] [2022-03-20 00:52:28,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:52:28,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562478397] [2022-03-20 00:52:28,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562478397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:52:28,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:52:28,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2022-03-20 00:52:28,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982560825] [2022-03-20 00:52:28,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:52:28,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 00:52:28,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:52:28,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 00:52:28,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 00:52:28,213 INFO L87 Difference]: Start difference. First operand 2947 states and 4844 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 34 states have internal predecessors, (80), 13 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) [2022-03-20 00:52:42,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:52:42,657 INFO L93 Difference]: Finished difference Result 4595 states and 7643 transitions. [2022-03-20 00:52:42,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-03-20 00:52:42,658 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 34 states have internal predecessors, (80), 13 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) Word has length 229 [2022-03-20 00:52:42,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:52:42,669 INFO L225 Difference]: With dead ends: 4595 [2022-03-20 00:52:42,669 INFO L226 Difference]: Without dead ends: 3464 [2022-03-20 00:52:42,675 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 423 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6790 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=4417, Invalid=17045, Unknown=0, NotChecked=0, Total=21462 [2022-03-20 00:52:42,676 INFO L913 BasicCegarLoop]: 222 mSDtfsCounter, 196 mSDsluCounter, 1967 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 2189 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:52:42,676 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 2189 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 2331 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-03-20 00:52:42,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2022-03-20 00:52:45,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 3315. [2022-03-20 00:52:45,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 1510 states have (on average 1.3112582781456954) internal successors, (1980), 1531 states have internal predecessors, (1980), 1737 states have call successors, (1737), 69 states have call predecessors, (1737), 67 states have return successors, (1735), 1714 states have call predecessors, (1735), 1735 states have call successors, (1735) [2022-03-20 00:52:45,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 5452 transitions. [2022-03-20 00:52:45,559 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 5452 transitions. Word has length 229 [2022-03-20 00:52:45,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:52:45,559 INFO L478 AbstractCegarLoop]: Abstraction has 3315 states and 5452 transitions. [2022-03-20 00:52:45,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 34 states have internal predecessors, (80), 13 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) [2022-03-20 00:52:45,559 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 5452 transitions. [2022-03-20 00:52:45,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-03-20 00:52:45,565 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:52:45,566 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:52:45,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 00:52:45,788 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 00:52:45,788 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:52:45,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:52:45,789 INFO L85 PathProgramCache]: Analyzing trace with hash -2144593086, now seen corresponding path program 10 times [2022-03-20 00:52:45,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:52:45,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460695401] [2022-03-20 00:52:45,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:52:45,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:52:45,797 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:52:45,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733686444] [2022-03-20 00:52:45,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 00:52:45,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:52:45,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:52:45,800 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:52:45,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 00:52:45,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 00:52:45,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:52:45,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 00:52:45,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:52:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 77 proven. 200 refuted. 0 times theorem prover too weak. 1999 trivial. 0 not checked. [2022-03-20 00:52:46,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:52:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 81 proven. 196 refuted. 0 times theorem prover too weak. 1999 trivial. 0 not checked. [2022-03-20 00:52:56,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:52:56,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460695401] [2022-03-20 00:52:56,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:52:56,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733686444] [2022-03-20 00:52:56,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733686444] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:52:56,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:52:56,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2022-03-20 00:52:56,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297468460] [2022-03-20 00:52:56,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:52:56,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 00:52:56,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:52:56,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 00:52:56,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 00:52:56,477 INFO L87 Difference]: Start difference. First operand 3315 states and 5452 transitions. Second operand has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 35 states have internal predecessors, (95), 20 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (72), 19 states have call predecessors, (72), 19 states have call successors, (72) [2022-03-20 00:53:09,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:53:09,835 INFO L93 Difference]: Finished difference Result 7088 states and 11858 transitions. [2022-03-20 00:53:09,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 00:53:09,838 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 35 states have internal predecessors, (95), 20 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (72), 19 states have call predecessors, (72), 19 states have call successors, (72) Word has length 231 [2022-03-20 00:53:09,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:53:09,859 INFO L225 Difference]: With dead ends: 7088 [2022-03-20 00:53:09,859 INFO L226 Difference]: Without dead ends: 6391 [2022-03-20 00:53:09,864 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2224, Invalid=7088, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 00:53:09,865 INFO L913 BasicCegarLoop]: 201 mSDtfsCounter, 157 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 1773 mSolverCounterSat, 999 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1992 SdHoareTripleChecker+Invalid, 2772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 999 IncrementalHoareTripleChecker+Valid, 1773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-20 00:53:09,865 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 1992 Invalid, 2772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [999 Valid, 1773 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-03-20 00:53:09,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6391 states. [2022-03-20 00:53:14,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6391 to 4841. [2022-03-20 00:53:14,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4841 states, 2178 states have (on average 1.3140495867768596) internal successors, (2862), 2199 states have internal predecessors, (2862), 2595 states have call successors, (2595), 69 states have call predecessors, (2595), 67 states have return successors, (2593), 2572 states have call predecessors, (2593), 2593 states have call successors, (2593) [2022-03-20 00:53:14,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4841 states to 4841 states and 8050 transitions. [2022-03-20 00:53:14,444 INFO L78 Accepts]: Start accepts. Automaton has 4841 states and 8050 transitions. Word has length 231 [2022-03-20 00:53:14,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:53:14,445 INFO L478 AbstractCegarLoop]: Abstraction has 4841 states and 8050 transitions. [2022-03-20 00:53:14,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 35 states have internal predecessors, (95), 20 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (72), 19 states have call predecessors, (72), 19 states have call successors, (72) [2022-03-20 00:53:14,445 INFO L276 IsEmpty]: Start isEmpty. Operand 4841 states and 8050 transitions. [2022-03-20 00:53:14,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-03-20 00:53:14,451 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:53:14,451 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 4, 4, 4, 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] [2022-03-20 00:53:14,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 00:53:14,652 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:53:14,652 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:53:14,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:53:14,653 INFO L85 PathProgramCache]: Analyzing trace with hash 96057407, now seen corresponding path program 11 times [2022-03-20 00:53:14,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:53:14,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040757985] [2022-03-20 00:53:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:53:14,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:53:14,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:53:14,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324473942] [2022-03-20 00:53:14,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 00:53:14,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:53:14,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:53:14,663 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:53:14,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 00:53:14,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-03-20 00:53:14,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:53:14,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 00:53:14,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:53:33,318 WARN L855 $PredicateComparison]: unable to prove that (exists ((aux_div_aux_div_aux_mod_aux_mod_v_main_~c~0_108_86_222_148_58 Int) (aux_mod_aux_div_v_main_~c~0_108_86_54 Int) (aux_div_aux_div_aux_mod_v_main_~c~0_108_86_222_50 Int) (aux_mod_aux_div_aux_mod_aux_mod_v_main_~c~0_108_86_222_148_58 Int) (aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_main_~v~0_28_59_141_177_213_249_87 Int) (aux_mod_aux_div_aux_div_aux_mod_aux_mod_main_~v~0_28_59_141_51_103 Int) (aux_div_aux_div_v_main_~c~0_108_86_54 Int) (aux_div_aux_div_aux_div_main_~b~0_54_28_39 Int) (aux_mod_aux_div_aux_mod_v_main_~c~0_108_86_222_50 Int) (aux_div_aux_div_aux_div_aux_mod_aux_mod_main_~v~0_28_59_141_51_103 Int) (aux_div_aux_div_aux_mod_main_~v~0_28_59_39 Int)) (let ((.cse0 (* 2 aux_div_aux_div_aux_div_main_~b~0_54_28_39)) (.cse9 (* 2 aux_div_aux_div_aux_mod_main_~v~0_28_59_39)) (.cse8 (* aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_main_~v~0_28_59_141_177_213_249_87 2)) (.cse11 (* 2 aux_mod_aux_div_aux_div_aux_mod_aux_mod_main_~v~0_28_59_141_51_103)) (.cse12 (* 2 c_main_~c~0)) (.cse10 (* (- 1) c_main_~c~0)) (.cse13 (* aux_div_aux_div_aux_div_aux_mod_aux_mod_main_~v~0_28_59_141_51_103 4)) (.cse2 (* 2 aux_mod_aux_div_aux_mod_aux_mod_v_main_~c~0_108_86_222_148_58)) (.cse4 (* aux_div_aux_div_aux_mod_aux_mod_v_main_~c~0_108_86_222_148_58 4)) (.cse6 (* aux_div_aux_div_v_main_~c~0_108_86_54 4)) (.cse7 (* 9 aux_div_aux_div_aux_div_main_~b~0_54_28_39)) (.cse3 (* 2 aux_mod_aux_div_aux_mod_v_main_~c~0_108_86_222_50)) (.cse14 (* aux_div_aux_div_aux_div_aux_mod_aux_mod_main_~v~0_28_59_141_51_103 2)) (.cse5 (* aux_mod_aux_div_v_main_~c~0_108_86_54 2)) (.cse1 (* aux_div_aux_div_aux_mod_v_main_~c~0_108_86_222_50 4))) (and (<= 0 aux_mod_aux_div_aux_mod_aux_mod_v_main_~c~0_108_86_222_148_58) (< aux_div_aux_div_aux_mod_v_main_~c~0_108_86_222_50 (+ .cse0 2)) (< (+ aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_main_~v~0_28_59_141_177_213_249_87 .cse1 6) (+ .cse2 .cse3 .cse4)) (<= 0 aux_mod_aux_div_aux_div_aux_mod_aux_mod_main_~v~0_28_59_141_51_103) (< aux_mod_aux_div_aux_mod_aux_mod_v_main_~c~0_108_86_222_148_58 2) (< (+ .cse5 5 .cse1 aux_div_aux_div_aux_mod_main_~v~0_28_59_39) (+ .cse6 .cse7 .cse3)) (< aux_mod_aux_div_aux_div_aux_mod_aux_mod_main_~v~0_28_59_141_51_103 2) (< .cse8 (+ .cse9 2)) (< .cse0 (+ aux_div_aux_div_aux_mod_aux_mod_v_main_~c~0_108_86_222_148_58 1)) (<= 0 aux_mod_aux_div_v_main_~c~0_108_86_54) (< aux_mod_aux_div_aux_mod_v_main_~c~0_108_86_222_50 2) (< (+ .cse9 (* aux_div_aux_div_aux_mod_aux_mod_v_main_~c~0_108_86_222_148_58 2) aux_mod_aux_div_aux_mod_aux_mod_v_main_~c~0_108_86_222_148_58) (+ (div (+ .cse10 (- 19)) 2) 1)) (< (+ .cse8 (* 2 aux_div_aux_div_aux_mod_v_main_~c~0_108_86_222_50)) (+ aux_div_aux_div_aux_div_aux_mod_aux_mod_main_~v~0_28_59_141_51_103 aux_mod_aux_div_aux_mod_v_main_~c~0_108_86_222_50 1)) (< 0 (+ .cse11 56 .cse8 .cse12 .cse13)) (< (+ c_main_~c~0 aux_mod_aux_div_aux_div_aux_mod_aux_mod_main_~v~0_28_59_141_51_103 aux_div_aux_div_aux_mod_main_~v~0_28_59_39 .cse14 26) 0) (< 0 aux_div_aux_div_aux_div_main_~b~0_54_28_39) (<= (+ .cse2 .cse5 .cse4) (+ .cse6 .cse7 2)) (< (+ c_main_~c~0 aux_mod_aux_div_aux_div_aux_mod_aux_mod_main_~v~0_28_59_141_51_103 20 .cse14) 0) (< (+ .cse6 .cse7) (+ .cse2 .cse5 .cse4 1)) (<= 0 aux_mod_aux_div_aux_mod_v_main_~c~0_108_86_222_50) (< (* aux_div_aux_div_v_main_~c~0_108_86_54 2) (+ .cse11 aux_mod_aux_div_v_main_~c~0_108_86_54 .cse12 (div (+ (- 20) (* (- 9) aux_div_aux_div_aux_div_main_~b~0_54_28_39) .cse10) 2) 55 .cse13)) (< aux_mod_aux_div_v_main_~c~0_108_86_54 2) (< (+ .cse2 c_main_~c~0 aux_mod_aux_div_aux_div_aux_mod_aux_mod_main_~v~0_28_59_141_51_103 .cse3 .cse4 17 .cse14) .cse1) (< (+ .cse6 .cse7 c_main_~c~0 aux_mod_aux_div_aux_div_aux_mod_aux_mod_main_~v~0_28_59_141_51_103 .cse3 18 .cse14) (+ .cse5 .cse1)) (< aux_div_aux_div_v_main_~c~0_108_86_54 2)))) is different from true [2022-03-20 00:56:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2288 backedges. 131 proven. 146 refuted. 0 times theorem prover too weak. 1999 trivial. 12 not checked. [2022-03-20 00:56:22,777 INFO L328 TraceCheckSpWp]: Computing backward predicates...