/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_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 14:22:54,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 14:22:54,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 14:22:55,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 14:22:55,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 14:22:55,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 14:22:55,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 14:22:55,027 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 14:22:55,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 14:22:55,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 14:22:55,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 14:22:55,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 14:22:55,033 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 14:22:55,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 14:22:55,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 14:22:55,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 14:22:55,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 14:22:55,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 14:22:55,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 14:22:55,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 14:22:55,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 14:22:55,064 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 [2022-03-18 14:22:55,095 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 14:22:55,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 14:22:55,095 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 14:22:55,095 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 14:22:55,096 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 14:22:55,096 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 14:22:55,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 14:22:55,097 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 14:22:55,097 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 14:22:55,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 14:22:55,098 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 14:22:55,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 14:22:55,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 14:22:55,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 14:22:55,098 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 14:22:55,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 14:22:55,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 14:22:55,100 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 14:22:55,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 14:22:55,100 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 14:22:55,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 14:22:55,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 14:22:55,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 14:22:55,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 14:22:55,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 14:22:55,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 14:22:55,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 14:22:55,101 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 14:22:55,101 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 14:22:55,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 14:22:55,102 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 14:22:55,102 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 14:22:55,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 14:22:55,102 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 14:22:55,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 14:22:55,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 14:22:55,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 14:22:55,384 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 14:22:55,385 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 14:22:55,386 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound2.c [2022-03-18 14:22:55,437 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a35a947b/e42796acaed149c29f14c58a521b2e34/FLAG4f9fdc691 [2022-03-18 14:22:55,824 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 14:22:55,824 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound2.c [2022-03-18 14:22:55,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a35a947b/e42796acaed149c29f14c58a521b2e34/FLAG4f9fdc691 [2022-03-18 14:22:56,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a35a947b/e42796acaed149c29f14c58a521b2e34 [2022-03-18 14:22:56,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 14:22:56,222 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 14:22:56,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 14:22:56,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 14:22:56,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 14:22:56,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:22:56" (1/1) ... [2022-03-18 14:22:56,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a4b4ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:22:56, skipping insertion in model container [2022-03-18 14:22:56,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:22:56" (1/1) ... [2022-03-18 14:22:56,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 14:22:56,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 14:22:56,402 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_valuebound2.c[490,503] [2022-03-18 14:22:56,419 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 14:22:56,424 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 14:22:56,434 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_valuebound2.c[490,503] [2022-03-18 14:22:56,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 14:22:56,451 INFO L208 MainTranslator]: Completed translation [2022-03-18 14:22:56,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:22:56 WrapperNode [2022-03-18 14:22:56,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 14:22:56,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 14:22:56,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 14:22:56,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 14:22:56,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:22:56" (1/1) ... [2022-03-18 14:22:56,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:22:56" (1/1) ... [2022-03-18 14:22:56,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:22:56" (1/1) ... [2022-03-18 14:22:56,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:22:56" (1/1) ... [2022-03-18 14:22:56,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:22:56" (1/1) ... [2022-03-18 14:22:56,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:22:56" (1/1) ... [2022-03-18 14:22:56,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:22:56" (1/1) ... [2022-03-18 14:22:56,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 14:22:56,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 14:22:56,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 14:22:56,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 14:22:56,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:22:56" (1/1) ... [2022-03-18 14:22:56,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 14:22:56,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:22:56,505 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) [2022-03-18 14:22:56,515 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 [2022-03-18 14:22:56,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 14:22:56,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 14:22:56,541 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 14:22:56,541 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 14:22:56,543 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 14:22:56,543 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 14:22:56,543 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 14:22:56,543 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 14:22:56,543 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 14:22:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 14:22:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 14:22:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 14:22:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 14:22:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 14:22:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 14:22:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 14:22:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 14:22:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 14:22:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 14:22:56,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 14:22:56,603 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 14:22:56,605 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 14:22:56,785 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 14:22:56,790 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 14:22:56,791 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-18 14:22:56,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:22:56 BoogieIcfgContainer [2022-03-18 14:22:56,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 14:22:56,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 14:22:56,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 14:22:56,810 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 14:22:56,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 02:22:56" (1/3) ... [2022-03-18 14:22:56,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@717102fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:22:56, skipping insertion in model container [2022-03-18 14:22:56,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:22:56" (2/3) ... [2022-03-18 14:22:56,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@717102fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:22:56, skipping insertion in model container [2022-03-18 14:22:56,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:22:56" (3/3) ... [2022-03-18 14:22:56,812 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound2.c [2022-03-18 14:22:56,816 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 14:22:56,816 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 14:22:56,887 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 14:22:56,896 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 [2022-03-18 14:22:56,897 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 14:22:56,922 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) [2022-03-18 14:22:56,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 14:22:56,927 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:22:56,927 INFO L500 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] [2022-03-18 14:22:56,929 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:22:56,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:22:56,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2022-03-18 14:22:56,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:22:56,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954881173] [2022-03-18 14:22:56,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:22:56,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:22:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:22:57,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 14:22:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:22:57,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 14:22:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:22:57,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 14:22:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:22:57,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 14:22:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:22:57,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 14:22:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:22:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 14:22:57,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:22:57,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954881173] [2022-03-18 14:22:57,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954881173] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 14:22:57,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 14:22:57,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 14:22:57,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110501348] [2022-03-18 14:22:57,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:22:57,189 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 14:22:57,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:22:57,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 14:22:57,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 14:22:57,221 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) [2022-03-18 14:22:57,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:22:57,309 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-03-18 14:22:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 14:22:57,315 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 [2022-03-18 14:22:57,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:22:57,321 INFO L225 Difference]: With dead ends: 73 [2022-03-18 14:22:57,322 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 14:22:57,324 INFO L911 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 [2022-03-18 14:22:57,327 INFO L912 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 [2022-03-18 14:22:57,330 INFO L913 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] [2022-03-18 14:22:57,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 14:22:57,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-18 14:22:57,359 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) [2022-03-18 14:22:57,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-18 14:22:57,364 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-03-18 14:22:57,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:22:57,364 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-18 14:22:57,364 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) [2022-03-18 14:22:57,364 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-18 14:22:57,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 14:22:57,366 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:22:57,366 INFO L500 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] [2022-03-18 14:22:57,366 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 14:22:57,367 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:22:57,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:22:57,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2022-03-18 14:22:57,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:22:57,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086992086] [2022-03-18 14:22:57,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:22:57,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:22:57,392 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:22:57,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984384541] [2022-03-18 14:22:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:22:57,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:22:57,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:22:57,400 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) [2022-03-18 14:22:57,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 14:22:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:22:57,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 14:22:57,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:22:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 14:22:57,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 14:22:57,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:22:57,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086992086] [2022-03-18 14:22:57,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:22:57,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984384541] [2022-03-18 14:22:57,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984384541] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 14:22:57,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 14:22:57,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 14:22:57,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062328059] [2022-03-18 14:22:57,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:22:57,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 14:22:57,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:22:57,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 14:22:57,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 14:22:57,672 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) [2022-03-18 14:22:57,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:22:57,746 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-03-18 14:22:57,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 14:22:57,747 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 [2022-03-18 14:22:57,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:22:57,748 INFO L225 Difference]: With dead ends: 54 [2022-03-18 14:22:57,748 INFO L226 Difference]: Without dead ends: 47 [2022-03-18 14:22:57,749 INFO L911 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 [2022-03-18 14:22:57,750 INFO L912 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 14:22:57,750 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 155 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 14:22:57,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-18 14:22:57,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-03-18 14:22:57,758 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) [2022-03-18 14:22:57,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-18 14:22:57,759 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-03-18 14:22:57,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:22:57,760 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-18 14:22:57,760 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) [2022-03-18 14:22:57,760 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-18 14:22:57,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 14:22:57,761 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:22:57,761 INFO L500 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] [2022-03-18 14:22:57,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 14:22:57,979 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 [2022-03-18 14:22:57,980 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:22:57,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:22:57,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1443363578, now seen corresponding path program 1 times [2022-03-18 14:22:57,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:22:57,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645444136] [2022-03-18 14:22:57,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:22:57,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:22:57,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:22:57,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664230513] [2022-03-18 14:22:57,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:22:57,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:22:57,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:22:57,998 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) [2022-03-18 14:22:58,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 14:22:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:22:58,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 14:22:58,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:22:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 14:22:58,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:22:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 14:22:58,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:22:58,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645444136] [2022-03-18 14:22:58,634 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:22:58,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664230513] [2022-03-18 14:22:58,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664230513] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 14:22:58,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 14:22:58,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-03-18 14:22:58,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087005322] [2022-03-18 14:22:58,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:22:58,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 14:22:58,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:22:58,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 14:22:58,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-03-18 14:22:58,637 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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) [2022-03-18 14:22:58,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:22:58,712 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2022-03-18 14:22:58,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 14:22:58,712 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 [2022-03-18 14:22:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:22:58,713 INFO L225 Difference]: With dead ends: 53 [2022-03-18 14:22:58,714 INFO L226 Difference]: Without dead ends: 51 [2022-03-18 14:22:58,714 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-18 14:22:58,715 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 16 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:22:58,715 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 226 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 14:22:58,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-18 14:22:58,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-18 14:22:58,723 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) [2022-03-18 14:22:58,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-18 14:22:58,725 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-03-18 14:22:58,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:22:58,725 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-18 14:22:58,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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) [2022-03-18 14:22:58,726 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-18 14:22:58,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 14:22:58,727 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:22:58,727 INFO L500 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] [2022-03-18 14:22:58,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 14:22:58,950 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 [2022-03-18 14:22:58,950 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:22:58,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:22:58,951 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2022-03-18 14:22:58,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:22:58,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768806540] [2022-03-18 14:22:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:22:58,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:22:58,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:22:58,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342046676] [2022-03-18 14:22:58,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:22:58,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:22:58,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:22:58,967 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) [2022-03-18 14:22:58,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 14:22:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:22:59,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 14:22:59,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:22:59,098 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 14:22:59,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:22:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 14:22:59,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:22:59,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768806540] [2022-03-18 14:22:59,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:22:59,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342046676] [2022-03-18 14:22:59,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342046676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:22:59,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:22:59,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 14:22:59,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379425021] [2022-03-18 14:22:59,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:22:59,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 14:22:59,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:22:59,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 14:22:59,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 14:22:59,214 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) [2022-03-18 14:22:59,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:22:59,420 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-03-18 14:22:59,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 14:22:59,421 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 [2022-03-18 14:22:59,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:22:59,423 INFO L225 Difference]: With dead ends: 103 [2022-03-18 14:22:59,423 INFO L226 Difference]: Without dead ends: 96 [2022-03-18 14:22:59,423 INFO L911 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 [2022-03-18 14:22:59,424 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 55 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:22:59,425 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 341 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 14:22:59,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-18 14:22:59,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-03-18 14:22:59,440 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) [2022-03-18 14:22:59,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-03-18 14:22:59,442 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-03-18 14:22:59,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:22:59,442 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-03-18 14:22:59,442 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) [2022-03-18 14:22:59,442 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-03-18 14:22:59,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 14:22:59,443 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:22:59,443 INFO L500 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] [2022-03-18 14:22:59,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 14:22:59,663 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 [2022-03-18 14:22:59,663 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:22:59,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:22:59,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1286298951, now seen corresponding path program 1 times [2022-03-18 14:22:59,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:22:59,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661996651] [2022-03-18 14:22:59,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:22:59,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:22:59,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:22:59,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159864626] [2022-03-18 14:22:59,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:22:59,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:22:59,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:22:59,686 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) [2022-03-18 14:22:59,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 14:22:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:22:59,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 14:22:59,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:22:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 14:22:59,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:23:00,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:23:00,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661996651] [2022-03-18 14:23:00,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:23:00,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159864626] [2022-03-18 14:23:00,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159864626] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 14:23:00,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 14:23:00,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-18 14:23:00,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532490893] [2022-03-18 14:23:00,017 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 14:23:00,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 14:23:00,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:23:00,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 14:23:00,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-18 14:23:00,018 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-18 14:23:00,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:23:00,111 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2022-03-18 14:23:00,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 14:23:00,111 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-03-18 14:23:00,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:23:00,112 INFO L225 Difference]: With dead ends: 79 [2022-03-18 14:23:00,112 INFO L226 Difference]: Without dead ends: 77 [2022-03-18 14:23:00,113 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-18 14:23:00,114 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 36 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:23:00,114 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 201 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 14:23:00,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-18 14:23:00,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-03-18 14:23:00,126 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) [2022-03-18 14:23:00,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-03-18 14:23:00,127 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-03-18 14:23:00,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:23:00,128 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-03-18 14:23:00,128 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-18 14:23:00,128 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-03-18 14:23:00,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 14:23:00,129 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:23:00,129 INFO L500 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] [2022-03-18 14:23:00,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 14:23:00,347 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 [2022-03-18 14:23:00,348 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:23:00,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:23:00,348 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2022-03-18 14:23:00,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:23:00,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812463684] [2022-03-18 14:23:00,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:00,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:23:00,370 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:23:00,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188569247] [2022-03-18 14:23:00,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:00,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:23:00,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:23:00,377 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) [2022-03-18 14:23:00,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 14:23:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:23:00,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 14:23:00,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:23:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 14:23:00,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:23:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 14:23:00,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:23:00,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812463684] [2022-03-18 14:23:00,982 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:23:00,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188569247] [2022-03-18 14:23:00,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188569247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:23:00,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:23:00,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-03-18 14:23:00,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757257710] [2022-03-18 14:23:00,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:23:00,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 14:23:00,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:23:00,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 14:23:00,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-18 14:23:00,985 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) [2022-03-18 14:23:01,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:23:01,460 INFO L93 Difference]: Finished difference Result 118 states and 159 transitions. [2022-03-18 14:23:01,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 14:23:01,460 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 [2022-03-18 14:23:01,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:23:01,462 INFO L225 Difference]: With dead ends: 118 [2022-03-18 14:23:01,462 INFO L226 Difference]: Without dead ends: 116 [2022-03-18 14:23:01,462 INFO L911 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 [2022-03-18 14:23:01,463 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 103 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 14:23:01,463 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 347 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 14:23:01,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-18 14:23:01,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-03-18 14:23:01,485 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) [2022-03-18 14:23:01,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2022-03-18 14:23:01,486 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2022-03-18 14:23:01,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:23:01,486 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2022-03-18 14:23:01,487 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) [2022-03-18 14:23:01,487 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2022-03-18 14:23:01,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 14:23:01,488 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:23:01,488 INFO L500 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] [2022-03-18 14:23:01,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-18 14:23:01,711 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 [2022-03-18 14:23:01,711 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:23:01,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:23:01,712 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2022-03-18 14:23:01,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:23:01,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092424118] [2022-03-18 14:23:01,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:01,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:23:01,729 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:23:01,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1309016657] [2022-03-18 14:23:01,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:01,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:23:01,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:23:01,731 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) [2022-03-18 14:23:01,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 14:23:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:23:01,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 14:23:01,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:23:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 14:23:01,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 14:23:01,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:23:01,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092424118] [2022-03-18 14:23:01,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:23:01,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309016657] [2022-03-18 14:23:01,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309016657] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 14:23:01,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 14:23:01,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 14:23:01,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183126880] [2022-03-18 14:23:01,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:23:01,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 14:23:01,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:23:01,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 14:23:01,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 14:23:01,858 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) [2022-03-18 14:23:01,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:23:01,905 INFO L93 Difference]: Finished difference Result 151 states and 213 transitions. [2022-03-18 14:23:01,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 14:23:01,905 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, (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 [2022-03-18 14:23:01,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:23:01,907 INFO L225 Difference]: With dead ends: 151 [2022-03-18 14:23:01,907 INFO L226 Difference]: Without dead ends: 149 [2022-03-18 14:23:01,907 INFO L911 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 [2022-03-18 14:23:01,908 INFO L912 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 [2022-03-18 14:23:01,908 INFO L913 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] [2022-03-18 14:23:01,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-18 14:23:01,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2022-03-18 14:23:01,957 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) [2022-03-18 14:23:01,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2022-03-18 14:23:01,958 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 47 [2022-03-18 14:23:01,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:23:01,959 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2022-03-18 14:23:01,959 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) [2022-03-18 14:23:01,959 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2022-03-18 14:23:01,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 14:23:01,960 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:23:01,960 INFO L500 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] [2022-03-18 14:23:01,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 14:23:02,161 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 [2022-03-18 14:23:02,161 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:23:02,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:23:02,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 1 times [2022-03-18 14:23:02,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:23:02,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927095984] [2022-03-18 14:23:02,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:02,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:23:02,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:23:02,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473908653] [2022-03-18 14:23:02,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:02,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:23:02,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:23:02,174 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) [2022-03-18 14:23:02,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 14:23:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:23:02,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-18 14:23:02,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:23:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 14:23:02,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:23:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 14:23:02,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:23:02,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927095984] [2022-03-18 14:23:02,888 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:23:02,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473908653] [2022-03-18 14:23:02,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473908653] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:23:02,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:23:02,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 18 [2022-03-18 14:23:02,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763807609] [2022-03-18 14:23:02,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:23:02,889 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 14:23:02,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:23:02,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 14:23:02,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-03-18 14:23:02,890 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-18 14:23:05,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:23:05,501 INFO L93 Difference]: Finished difference Result 190 states and 265 transitions. [2022-03-18 14:23:05,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 14:23:05,501 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 47 [2022-03-18 14:23:05,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:23:05,504 INFO L225 Difference]: With dead ends: 190 [2022-03-18 14:23:05,504 INFO L226 Difference]: Without dead ends: 188 [2022-03-18 14:23:05,505 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 14:23:05,506 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 130 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-18 14:23:05,506 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 358 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-18 14:23:05,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-18 14:23:05,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 179. [2022-03-18 14:23:05,542 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) [2022-03-18 14:23:05,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 252 transitions. [2022-03-18 14:23:05,544 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 252 transitions. Word has length 47 [2022-03-18 14:23:05,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:23:05,544 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 252 transitions. [2022-03-18 14:23:05,544 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-18 14:23:05,544 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 252 transitions. [2022-03-18 14:23:05,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 14:23:05,545 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:23:05,546 INFO L500 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] [2022-03-18 14:23:05,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 14:23:05,767 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 [2022-03-18 14:23:05,767 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:23:05,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:23:05,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 2 times [2022-03-18 14:23:05,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:23:05,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926864390] [2022-03-18 14:23:05,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:05,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:23:05,783 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:23:05,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853418299] [2022-03-18 14:23:05,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 14:23:05,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:23:05,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:23:05,789 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) [2022-03-18 14:23:05,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 14:23:05,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 14:23:05,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 14:23:05,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 14:23:05,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:23:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 14:23:05,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 14:23:05,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:23:05,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926864390] [2022-03-18 14:23:05,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:23:05,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853418299] [2022-03-18 14:23:05,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853418299] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 14:23:05,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 14:23:05,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 14:23:05,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006930853] [2022-03-18 14:23:05,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:23:05,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 14:23:05,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:23:05,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 14:23:05,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 14:23:05,903 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) [2022-03-18 14:23:05,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:23:05,982 INFO L93 Difference]: Finished difference Result 225 states and 312 transitions. [2022-03-18 14:23:05,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 14:23:05,983 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 [2022-03-18 14:23:05,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:23:05,984 INFO L225 Difference]: With dead ends: 225 [2022-03-18 14:23:05,984 INFO L226 Difference]: Without dead ends: 144 [2022-03-18 14:23:05,985 INFO L911 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 [2022-03-18 14:23:05,986 INFO L912 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 [2022-03-18 14:23:05,986 INFO L913 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] [2022-03-18 14:23:05,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-18 14:23:06,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 121. [2022-03-18 14:23:06,008 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) [2022-03-18 14:23:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 160 transitions. [2022-03-18 14:23:06,009 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 160 transitions. Word has length 47 [2022-03-18 14:23:06,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:23:06,009 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 160 transitions. [2022-03-18 14:23:06,009 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) [2022-03-18 14:23:06,009 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 160 transitions. [2022-03-18 14:23:06,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-18 14:23:06,010 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:23:06,010 INFO L500 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] [2022-03-18 14:23:06,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 14:23:06,223 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 [2022-03-18 14:23:06,224 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:23:06,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:23:06,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2022-03-18 14:23:06,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:23:06,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275959130] [2022-03-18 14:23:06,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:06,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:23:06,234 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:23:06,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702205151] [2022-03-18 14:23:06,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:06,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:23:06,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:23:06,236 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) [2022-03-18 14:23:06,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 14:23:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:23:06,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 14:23:06,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:23:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 14:23:06,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 14:23:06,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:23:06,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275959130] [2022-03-18 14:23:06,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:23:06,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702205151] [2022-03-18 14:23:06,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702205151] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 14:23:06,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 14:23:06,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 14:23:06,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908258031] [2022-03-18 14:23:06,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:23:06,395 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 14:23:06,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:23:06,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 14:23:06,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 14:23:06,395 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) [2022-03-18 14:23:06,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:23:06,481 INFO L93 Difference]: Finished difference Result 167 states and 233 transitions. [2022-03-18 14:23:06,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 14:23:06,482 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 [2022-03-18 14:23:06,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:23:06,483 INFO L225 Difference]: With dead ends: 167 [2022-03-18 14:23:06,483 INFO L226 Difference]: Without dead ends: 165 [2022-03-18 14:23:06,483 INFO L911 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 [2022-03-18 14:23:06,484 INFO L912 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 [2022-03-18 14:23:06,484 INFO L913 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] [2022-03-18 14:23:06,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-18 14:23:06,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2022-03-18 14:23:06,514 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) [2022-03-18 14:23:06,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 205 transitions. [2022-03-18 14:23:06,515 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 205 transitions. Word has length 52 [2022-03-18 14:23:06,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:23:06,515 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 205 transitions. [2022-03-18 14:23:06,515 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) [2022-03-18 14:23:06,515 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 205 transitions. [2022-03-18 14:23:06,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-18 14:23:06,517 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:23:06,517 INFO L500 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] [2022-03-18 14:23:06,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 14:23:06,740 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 [2022-03-18 14:23:06,740 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:23:06,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:23:06,741 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2022-03-18 14:23:06,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:23:06,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042312989] [2022-03-18 14:23:06,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:06,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:23:06,757 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:23:06,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435762081] [2022-03-18 14:23:06,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:06,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:23:06,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:23:06,760 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) [2022-03-18 14:23:06,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 14:23:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:23:06,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 14:23:06,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:23:07,296 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-18 14:23:07,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:23:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-18 14:23:07,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:23:07,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042312989] [2022-03-18 14:23:07,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:23:07,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435762081] [2022-03-18 14:23:07,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435762081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:23:07,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:23:07,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-18 14:23:07,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020736368] [2022-03-18 14:23:07,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:23:07,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 14:23:07,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:23:07,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 14:23:07,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-18 14:23:07,670 INFO L87 Difference]: Start difference. First operand 148 states and 205 transitions. Second operand has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-18 14:23:10,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:23:10,406 INFO L93 Difference]: Finished difference Result 331 states and 487 transitions. [2022-03-18 14:23:10,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 14:23:10,406 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 64 [2022-03-18 14:23:10,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:23:10,409 INFO L225 Difference]: With dead ends: 331 [2022-03-18 14:23:10,409 INFO L226 Difference]: Without dead ends: 326 [2022-03-18 14:23:10,410 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 14:23:10,411 INFO L912 BasicCegarLoop]: 79 mSDtfsCounter, 143 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-18 14:23:10,411 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 586 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-18 14:23:10,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-03-18 14:23:10,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 250. [2022-03-18 14:23:10,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 146 states have (on average 1.1986301369863013) internal successors, (175), 153 states have internal predecessors, (175), 89 states have call successors, (89), 15 states have call predecessors, (89), 14 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-18 14:23:10,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 351 transitions. [2022-03-18 14:23:10,477 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 351 transitions. Word has length 64 [2022-03-18 14:23:10,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:23:10,477 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 351 transitions. [2022-03-18 14:23:10,477 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-18 14:23:10,478 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 351 transitions. [2022-03-18 14:23:10,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-18 14:23:10,478 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:23:10,479 INFO L500 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] [2022-03-18 14:23:10,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 14:23:10,699 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 [2022-03-18 14:23:10,700 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:23:10,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:23:10,700 INFO L85 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 1 times [2022-03-18 14:23:10,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:23:10,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225630575] [2022-03-18 14:23:10,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:10,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:23:10,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:23:10,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631116897] [2022-03-18 14:23:10,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:10,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:23:10,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:23:10,731 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) [2022-03-18 14:23:10,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 14:23:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:23:10,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 14:23:10,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:23:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-03-18 14:23:11,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:23:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-18 14:23:11,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:23:11,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225630575] [2022-03-18 14:23:11,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:23:11,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631116897] [2022-03-18 14:23:11,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631116897] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 14:23:11,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 14:23:11,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 14 [2022-03-18 14:23:11,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3857942] [2022-03-18 14:23:11,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:23:11,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 14:23:11,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:23:11,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 14:23:11,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-03-18 14:23:11,341 INFO L87 Difference]: Start difference. First operand 250 states and 351 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-03-18 14:23:11,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:23:11,483 INFO L93 Difference]: Finished difference Result 256 states and 356 transitions. [2022-03-18 14:23:11,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 14:23:11,483 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2022-03-18 14:23:11,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:23:11,485 INFO L225 Difference]: With dead ends: 256 [2022-03-18 14:23:11,485 INFO L226 Difference]: Without dead ends: 254 [2022-03-18 14:23:11,485 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-03-18 14:23:11,486 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 13 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 14:23:11,486 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 145 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 14:23:11,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-18 14:23:11,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-03-18 14:23:11,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 149 states have (on average 1.1946308724832215) internal successors, (178), 156 states have internal predecessors, (178), 89 states have call successors, (89), 16 states have call predecessors, (89), 15 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-18 14:23:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 354 transitions. [2022-03-18 14:23:11,571 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 354 transitions. Word has length 74 [2022-03-18 14:23:11,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:23:11,572 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 354 transitions. [2022-03-18 14:23:11,572 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-03-18 14:23:11,572 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 354 transitions. [2022-03-18 14:23:11,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-18 14:23:11,573 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:23:11,573 INFO L500 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] [2022-03-18 14:23:11,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 14:23:11,786 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 [2022-03-18 14:23:11,787 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:23:11,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:23:11,787 INFO L85 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 1 times [2022-03-18 14:23:11,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:23:11,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435017471] [2022-03-18 14:23:11,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:11,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:23:11,796 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:23:11,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1450200161] [2022-03-18 14:23:11,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:11,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:23:11,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:23:11,798 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) [2022-03-18 14:23:11,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 14:23:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:23:11,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 14:23:11,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:23:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-18 14:23:12,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:23:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-18 14:23:12,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:23:12,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435017471] [2022-03-18 14:23:12,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:23:12,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450200161] [2022-03-18 14:23:12,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450200161] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:23:12,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:23:12,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-18 14:23:12,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392495832] [2022-03-18 14:23:12,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:23:12,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 14:23:12,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:23:12,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 14:23:12,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-03-18 14:23:12,234 INFO L87 Difference]: Start difference. First operand 254 states and 354 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-18 14:23:12,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:23:12,587 INFO L93 Difference]: Finished difference Result 363 states and 502 transitions. [2022-03-18 14:23:12,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 14:23:12,588 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 72 [2022-03-18 14:23:12,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:23:12,589 INFO L225 Difference]: With dead ends: 363 [2022-03-18 14:23:12,589 INFO L226 Difference]: Without dead ends: 244 [2022-03-18 14:23:12,590 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-03-18 14:23:12,591 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 77 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 14:23:12,591 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 355 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 14:23:12,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-18 14:23:12,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 229. [2022-03-18 14:23:12,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 128 states have (on average 1.171875) internal successors, (150), 134 states have internal predecessors, (150), 85 states have call successors, (85), 16 states have call predecessors, (85), 15 states have return successors, (83), 78 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-18 14:23:12,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 318 transitions. [2022-03-18 14:23:12,659 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 318 transitions. Word has length 72 [2022-03-18 14:23:12,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:23:12,659 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 318 transitions. [2022-03-18 14:23:12,659 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-18 14:23:12,659 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 318 transitions. [2022-03-18 14:23:12,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 14:23:12,660 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:23:12,660 INFO L500 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] [2022-03-18 14:23:12,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 14:23:12,873 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 [2022-03-18 14:23:12,873 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:23:12,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:23:12,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 1 times [2022-03-18 14:23:12,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:23:12,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385482026] [2022-03-18 14:23:12,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:12,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:23:12,882 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:23:12,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984186432] [2022-03-18 14:23:12,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:12,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:23:12,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:23:12,883 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) [2022-03-18 14:23:12,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 14:23:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:23:12,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-18 14:23:12,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:23:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-18 14:23:13,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:23:15,264 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-18 14:23:15,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:23:15,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385482026] [2022-03-18 14:23:15,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:23:15,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984186432] [2022-03-18 14:23:15,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984186432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:23:15,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:23:15,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2022-03-18 14:23:15,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68786705] [2022-03-18 14:23:15,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:23:15,265 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 14:23:15,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:23:15,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 14:23:15,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-03-18 14:23:15,266 INFO L87 Difference]: Start difference. First operand 229 states and 318 transitions. Second operand has 28 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-18 14:23:21,397 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 [] [2022-03-18 14:23:34,121 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:23:40,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:23:42,528 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:23:50,266 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:23:50,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:23:50,890 INFO L93 Difference]: Finished difference Result 424 states and 618 transitions. [2022-03-18 14:23:50,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-18 14:23:50,891 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 91 [2022-03-18 14:23:50,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:23:50,893 INFO L225 Difference]: With dead ends: 424 [2022-03-18 14:23:50,893 INFO L226 Difference]: Without dead ends: 419 [2022-03-18 14:23:50,895 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=1140, Invalid=4559, Unknown=1, NotChecked=0, Total=5700 [2022-03-18 14:23:50,895 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 212 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1627 mSolverCounterSat, 590 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 2218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 1627 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.5s IncrementalHoareTripleChecker+Time [2022-03-18 14:23:50,895 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 789 Invalid, 2218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 1627 Invalid, 1 Unknown, 0 Unchecked, 22.5s Time] [2022-03-18 14:23:50,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-03-18 14:23:51,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 351. [2022-03-18 14:23:51,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 191 states have (on average 1.1727748691099475) internal successors, (224), 200 states have internal predecessors, (224), 139 states have call successors, (139), 21 states have call predecessors, (139), 20 states have return successors, (137), 129 states have call predecessors, (137), 137 states have call successors, (137) [2022-03-18 14:23:51,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 500 transitions. [2022-03-18 14:23:51,042 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 500 transitions. Word has length 91 [2022-03-18 14:23:51,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:23:51,042 INFO L478 AbstractCegarLoop]: Abstraction has 351 states and 500 transitions. [2022-03-18 14:23:51,042 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-18 14:23:51,042 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 500 transitions. [2022-03-18 14:23:51,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-18 14:23:51,043 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:23:51,043 INFO L500 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] [2022-03-18 14:23:51,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 14:23:51,249 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 [2022-03-18 14:23:51,250 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:23:51,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:23:51,250 INFO L85 PathProgramCache]: Analyzing trace with hash -801999833, now seen corresponding path program 1 times [2022-03-18 14:23:51,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:23:51,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211286169] [2022-03-18 14:23:51,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:51,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:23:51,257 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:23:51,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22577596] [2022-03-18 14:23:51,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:51,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:23:51,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:23:51,259 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) [2022-03-18 14:23:51,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 14:23:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:23:51,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 14:23:51,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:23:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 90 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-03-18 14:23:51,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:23:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-18 14:23:51,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:23:51,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211286169] [2022-03-18 14:23:51,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:23:51,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22577596] [2022-03-18 14:23:51,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22577596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:23:51,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:23:51,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-03-18 14:23:51,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266409881] [2022-03-18 14:23:51,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:23:51,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 14:23:51,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:23:51,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 14:23:51,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-03-18 14:23:51,820 INFO L87 Difference]: Start difference. First operand 351 states and 500 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2022-03-18 14:23:52,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:23:52,318 INFO L93 Difference]: Finished difference Result 570 states and 802 transitions. [2022-03-18 14:23:52,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 14:23:52,319 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 94 [2022-03-18 14:23:52,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:23:52,321 INFO L225 Difference]: With dead ends: 570 [2022-03-18 14:23:52,321 INFO L226 Difference]: Without dead ends: 350 [2022-03-18 14:23:52,322 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=787, Unknown=0, NotChecked=0, Total=992 [2022-03-18 14:23:52,322 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 80 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 14:23:52,323 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 388 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 14:23:52,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-03-18 14:23:52,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 341. [2022-03-18 14:23:52,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 197 states have (on average 1.1776649746192893) internal successors, (232), 198 states have internal predecessors, (232), 123 states have call successors, (123), 21 states have call predecessors, (123), 20 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2022-03-18 14:23:52,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 476 transitions. [2022-03-18 14:23:52,488 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 476 transitions. Word has length 94 [2022-03-18 14:23:52,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:23:52,489 INFO L478 AbstractCegarLoop]: Abstraction has 341 states and 476 transitions. [2022-03-18 14:23:52,489 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2022-03-18 14:23:52,489 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 476 transitions. [2022-03-18 14:23:52,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-18 14:23:52,490 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:23:52,490 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-03-18 14:23:52,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-18 14:23:52,706 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 [2022-03-18 14:23:52,706 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:23:52,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:23:52,707 INFO L85 PathProgramCache]: Analyzing trace with hash 640779908, now seen corresponding path program 1 times [2022-03-18 14:23:52,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:23:52,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998567339] [2022-03-18 14:23:52,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:52,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:23:52,717 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:23:52,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472155596] [2022-03-18 14:23:52,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:52,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:23:52,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:23:52,719 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) [2022-03-18 14:23:52,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 14:23:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:23:52,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 14:23:52,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:23:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 58 proven. 19 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-03-18 14:23:53,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:23:53,661 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-03-18 14:23:53,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:23:53,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998567339] [2022-03-18 14:23:53,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:23:53,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472155596] [2022-03-18 14:23:53,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472155596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:23:53,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:23:53,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-18 14:23:53,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708849735] [2022-03-18 14:23:53,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:23:53,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 14:23:53,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:23:53,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 14:23:53,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-03-18 14:23:53,663 INFO L87 Difference]: Start difference. First operand 341 states and 476 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2022-03-18 14:23:54,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:23:54,330 INFO L93 Difference]: Finished difference Result 468 states and 654 transitions. [2022-03-18 14:23:54,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 14:23:54,330 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 94 [2022-03-18 14:23:54,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:23:54,332 INFO L225 Difference]: With dead ends: 468 [2022-03-18 14:23:54,332 INFO L226 Difference]: Without dead ends: 297 [2022-03-18 14:23:54,333 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=246, Invalid=944, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 14:23:54,334 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 66 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 14:23:54,334 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 385 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 194 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-03-18 14:23:54,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-03-18 14:23:54,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2022-03-18 14:23:54,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 168 states have (on average 1.1666666666666667) internal successors, (196), 169 states have internal predecessors, (196), 111 states have call successors, (111), 18 states have call predecessors, (111), 17 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2022-03-18 14:23:54,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 416 transitions. [2022-03-18 14:23:54,439 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 416 transitions. Word has length 94 [2022-03-18 14:23:54,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:23:54,439 INFO L478 AbstractCegarLoop]: Abstraction has 297 states and 416 transitions. [2022-03-18 14:23:54,440 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2022-03-18 14:23:54,440 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 416 transitions. [2022-03-18 14:23:54,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-18 14:23:54,441 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:23:54,441 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 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, 1] [2022-03-18 14:23:54,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 14:23:54,652 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 [2022-03-18 14:23:54,652 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:23:54,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:23:54,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1419000176, now seen corresponding path program 2 times [2022-03-18 14:23:54,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:23:54,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028812701] [2022-03-18 14:23:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:54,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:23:54,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:23:54,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558802441] [2022-03-18 14:23:54,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 14:23:54,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:23:54,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:23:54,667 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) [2022-03-18 14:23:54,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 14:23:54,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 14:23:54,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 14:23:54,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 14:23:54,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:23:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 46 proven. 30 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-03-18 14:23:55,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:23:56,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:23:56,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028812701] [2022-03-18 14:23:56,572 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:23:56,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558802441] [2022-03-18 14:23:56,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558802441] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 14:23:56,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 14:23:56,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-18 14:23:56,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011475543] [2022-03-18 14:23:56,572 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 14:23:56,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 14:23:56,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:23:56,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 14:23:56,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-03-18 14:23:56,573 INFO L87 Difference]: Start difference. First operand 297 states and 416 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-18 14:23:57,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:23:57,181 INFO L93 Difference]: Finished difference Result 458 states and 657 transitions. [2022-03-18 14:23:57,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 14:23:57,183 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 116 [2022-03-18 14:23:57,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:23:57,186 INFO L225 Difference]: With dead ends: 458 [2022-03-18 14:23:57,186 INFO L226 Difference]: Without dead ends: 377 [2022-03-18 14:23:57,187 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 183 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2022-03-18 14:23:57,187 INFO L912 BasicCegarLoop]: 74 mSDtfsCounter, 52 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 14:23:57,188 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 488 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 14:23:57,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-03-18 14:23:57,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 321. [2022-03-18 14:23:57,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 184 states have (on average 1.1630434782608696) internal successors, (214), 185 states have internal predecessors, (214), 119 states have call successors, (119), 18 states have call predecessors, (119), 17 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2022-03-18 14:23:57,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 450 transitions. [2022-03-18 14:23:57,346 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 450 transitions. Word has length 116 [2022-03-18 14:23:57,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:23:57,347 INFO L478 AbstractCegarLoop]: Abstraction has 321 states and 450 transitions. [2022-03-18 14:23:57,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-18 14:23:57,347 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 450 transitions. [2022-03-18 14:23:57,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-18 14:23:57,348 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:23:57,349 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 3, 3, 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] [2022-03-18 14:23:57,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 14:23:57,572 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 [2022-03-18 14:23:57,572 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:23:57,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:23:57,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2089528091, now seen corresponding path program 3 times [2022-03-18 14:23:57,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:23:57,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92997592] [2022-03-18 14:23:57,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:23:57,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:23:57,590 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:23:57,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237936556] [2022-03-18 14:23:57,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 14:23:57,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:23:57,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:23:57,602 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) [2022-03-18 14:23:57,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 14:23:57,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 14:23:57,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 14:23:57,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 14:23:57,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:23:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 41 proven. 36 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-03-18 14:23:58,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:23:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-03-18 14:23:59,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:23:59,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92997592] [2022-03-18 14:23:59,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:23:59,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237936556] [2022-03-18 14:23:59,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237936556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:23:59,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:23:59,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2022-03-18 14:23:59,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542373206] [2022-03-18 14:23:59,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:23:59,442 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 14:23:59,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:23:59,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 14:23:59,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-03-18 14:23:59,442 INFO L87 Difference]: Start difference. First operand 321 states and 450 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) [2022-03-18 14:24:07,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:24:07,170 INFO L93 Difference]: Finished difference Result 503 states and 717 transitions. [2022-03-18 14:24:07,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 14:24:07,171 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) Word has length 119 [2022-03-18 14:24:07,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:24:07,173 INFO L225 Difference]: With dead ends: 503 [2022-03-18 14:24:07,174 INFO L226 Difference]: Without dead ends: 501 [2022-03-18 14:24:07,175 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=719, Invalid=2703, Unknown=0, NotChecked=0, Total=3422 [2022-03-18 14:24:07,175 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 238 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-18 14:24:07,175 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 763 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-18 14:24:07,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-03-18 14:24:07,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 494. [2022-03-18 14:24:07,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 286 states have (on average 1.1748251748251748) internal successors, (336), 287 states have internal predecessors, (336), 187 states have call successors, (187), 21 states have call predecessors, (187), 20 states have return successors, (185), 185 states have call predecessors, (185), 185 states have call successors, (185) [2022-03-18 14:24:07,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 708 transitions. [2022-03-18 14:24:07,458 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 708 transitions. Word has length 119 [2022-03-18 14:24:07,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:24:07,458 INFO L478 AbstractCegarLoop]: Abstraction has 494 states and 708 transitions. [2022-03-18 14:24:07,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) [2022-03-18 14:24:07,459 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 708 transitions. [2022-03-18 14:24:07,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-18 14:24:07,461 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:24:07,461 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1] [2022-03-18 14:24:07,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 14:24:07,683 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 [2022-03-18 14:24:07,684 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:24:07,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:24:07,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1435472518, now seen corresponding path program 4 times [2022-03-18 14:24:07,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:24:07,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941479548] [2022-03-18 14:24:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:24:07,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:24:07,694 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:24:07,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060932949] [2022-03-18 14:24:07,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 14:24:07,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:24:07,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:24:07,696 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) [2022-03-18 14:24:07,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 14:24:07,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 14:24:07,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 14:24:07,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 14:24:07,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:24:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 139 proven. 28 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-03-18 14:24:08,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:24:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-03-18 14:24:08,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:24:08,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941479548] [2022-03-18 14:24:08,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:24:08,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060932949] [2022-03-18 14:24:08,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060932949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:24:08,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:24:08,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2022-03-18 14:24:08,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260950540] [2022-03-18 14:24:08,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:24:08,545 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 14:24:08,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:24:08,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 14:24:08,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-18 14:24:08,546 INFO L87 Difference]: Start difference. First operand 494 states and 708 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 19 states have internal predecessors, (59), 10 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36) [2022-03-18 14:24:09,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:24:09,019 INFO L93 Difference]: Finished difference Result 603 states and 837 transitions. [2022-03-18 14:24:09,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 14:24:09,019 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 19 states have internal predecessors, (59), 10 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36) Word has length 121 [2022-03-18 14:24:09,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:24:09,020 INFO L225 Difference]: With dead ends: 603 [2022-03-18 14:24:09,020 INFO L226 Difference]: Without dead ends: 231 [2022-03-18 14:24:09,022 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 14:24:09,023 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 44 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 14:24:09,023 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 584 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 14:24:09,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-03-18 14:24:09,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 204. [2022-03-18 14:24:09,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 125 states have (on average 1.04) internal successors, (130), 126 states have internal predecessors, (130), 59 states have call successors, (59), 20 states have call predecessors, (59), 19 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2022-03-18 14:24:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 246 transitions. [2022-03-18 14:24:09,085 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 246 transitions. Word has length 121 [2022-03-18 14:24:09,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:24:09,085 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 246 transitions. [2022-03-18 14:24:09,086 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 19 states have internal predecessors, (59), 10 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36) [2022-03-18 14:24:09,086 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 246 transitions. [2022-03-18 14:24:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-18 14:24:09,087 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:24:09,087 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1] [2022-03-18 14:24:09,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 14:24:09,297 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 [2022-03-18 14:24:09,298 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:24:09,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:24:09,298 INFO L85 PathProgramCache]: Analyzing trace with hash -592245754, now seen corresponding path program 5 times [2022-03-18 14:24:09,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:24:09,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699007305] [2022-03-18 14:24:09,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:24:09,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:24:09,306 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:24:09,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054464560] [2022-03-18 14:24:09,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 14:24:09,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:24:09,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:24:09,308 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) [2022-03-18 14:24:09,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 14:24:09,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-18 14:24:09,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 14:24:09,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 14:24:09,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:24:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 114 proven. 47 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2022-03-18 14:24:09,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:24:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 52 proven. 47 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2022-03-18 14:24:10,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:24:10,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699007305] [2022-03-18 14:24:10,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:24:10,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054464560] [2022-03-18 14:24:10,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054464560] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:24:10,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:24:10,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 23 [2022-03-18 14:24:10,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801299781] [2022-03-18 14:24:10,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:24:10,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 14:24:10,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:24:10,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 14:24:10,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-03-18 14:24:10,540 INFO L87 Difference]: Start difference. First operand 204 states and 246 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 12 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (43), 12 states have call predecessors, (43), 12 states have call successors, (43) [2022-03-18 14:24:11,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:24:11,547 INFO L93 Difference]: Finished difference Result 295 states and 358 transitions. [2022-03-18 14:24:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 14:24:11,547 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 12 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (43), 12 states have call predecessors, (43), 12 states have call successors, (43) Word has length 138 [2022-03-18 14:24:11,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:24:11,548 INFO L225 Difference]: With dead ends: 295 [2022-03-18 14:24:11,548 INFO L226 Difference]: Without dead ends: 164 [2022-03-18 14:24:11,549 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 14:24:11,550 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 66 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 14:24:11,550 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 551 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 14:24:11,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-18 14:24:11,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-03-18 14:24:11,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 106 states have internal predecessors, (108), 43 states have call successors, (43), 16 states have call predecessors, (43), 15 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-18 14:24:11,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 192 transitions. [2022-03-18 14:24:11,614 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 192 transitions. Word has length 138 [2022-03-18 14:24:11,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:24:11,614 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 192 transitions. [2022-03-18 14:24:11,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 12 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (43), 12 states have call predecessors, (43), 12 states have call successors, (43) [2022-03-18 14:24:11,615 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 192 transitions. [2022-03-18 14:24:11,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-18 14:24:11,615 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:24:11,616 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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] [2022-03-18 14:24:11,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 14:24:11,817 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 [2022-03-18 14:24:11,817 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:24:11,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:24:11,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1839651187, now seen corresponding path program 6 times [2022-03-18 14:24:11,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:24:11,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79895573] [2022-03-18 14:24:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:24:11,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:24:11,840 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:24:11,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276134161] [2022-03-18 14:24:11,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 14:24:11,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:24:11,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:24:11,842 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) [2022-03-18 14:24:11,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 14:24:12,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 14:24:12,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 14:24:12,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-18 14:24:12,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:24:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 159 proven. 98 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2022-03-18 14:24:14,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:24:15,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:24:15,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79895573] [2022-03-18 14:24:15,068 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:24:15,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276134161] [2022-03-18 14:24:15,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276134161] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 14:24:15,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 14:24:15,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-18 14:24:15,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582313033] [2022-03-18 14:24:15,068 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 14:24:15,068 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 14:24:15,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:24:15,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 14:24:15,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-03-18 14:24:15,069 INFO L87 Difference]: Start difference. First operand 164 states and 192 transitions. Second operand has 21 states, 20 states have (on average 2.65) internal successors, (53), 17 states have internal predecessors, (53), 10 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2022-03-18 14:24:16,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:24:16,326 INFO L93 Difference]: Finished difference Result 174 states and 200 transitions. [2022-03-18 14:24:16,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 14:24:16,327 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 17 states have internal predecessors, (53), 10 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) Word has length 151 [2022-03-18 14:24:16,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:24:16,328 INFO L225 Difference]: With dead ends: 174 [2022-03-18 14:24:16,328 INFO L226 Difference]: Without dead ends: 160 [2022-03-18 14:24:16,328 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 14:24:16,329 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 42 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 14:24:16,330 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 314 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 14:24:16,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-18 14:24:16,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-03-18 14:24:16,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 105 states have internal predecessors, (106), 39 states have call successors, (39), 17 states have call predecessors, (39), 15 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-18 14:24:16,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 182 transitions. [2022-03-18 14:24:16,374 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 182 transitions. Word has length 151 [2022-03-18 14:24:16,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:24:16,375 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 182 transitions. [2022-03-18 14:24:16,375 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 17 states have internal predecessors, (53), 10 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2022-03-18 14:24:16,375 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 182 transitions. [2022-03-18 14:24:16,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-03-18 14:24:16,378 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:24:16,378 INFO L500 BasicCegarLoop]: trace histogram [33, 32, 32, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:24:16,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 14:24:16,584 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 [2022-03-18 14:24:16,584 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:24:16,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:24:16,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1359562900, now seen corresponding path program 2 times [2022-03-18 14:24:16,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:24:16,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827036119] [2022-03-18 14:24:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:24:16,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:24:16,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:24:16,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714380651] [2022-03-18 14:24:16,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 14:24:16,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:24:16,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:24:16,603 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) [2022-03-18 14:24:16,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 14:24:16,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 14:24:16,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 14:24:16,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-18 14:24:16,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:24:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 123 proven. 224 refuted. 0 times theorem prover too weak. 2011 trivial. 0 not checked. [2022-03-18 14:24:18,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:24:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 82 proven. 265 refuted. 0 times theorem prover too weak. 2011 trivial. 0 not checked. [2022-03-18 14:24:19,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:24:19,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827036119] [2022-03-18 14:24:19,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:24:19,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714380651] [2022-03-18 14:24:19,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714380651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:24:19,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:24:19,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2022-03-18 14:24:19,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269033445] [2022-03-18 14:24:19,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:24:19,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-18 14:24:19,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:24:19,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-18 14:24:19,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1430, Unknown=0, NotChecked=0, Total=1640 [2022-03-18 14:24:19,880 INFO L87 Difference]: Start difference. First operand 160 states and 182 transitions. Second operand has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 18 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (65), 17 states have call predecessors, (65), 17 states have call successors, (65) [2022-03-18 14:24:21,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:24:21,074 INFO L93 Difference]: Finished difference Result 180 states and 197 transitions. [2022-03-18 14:24:21,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 14:24:21,074 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 18 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (65), 17 states have call predecessors, (65), 17 states have call successors, (65) Word has length 247 [2022-03-18 14:24:21,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:24:21,074 INFO L225 Difference]: With dead ends: 180 [2022-03-18 14:24:21,075 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 14:24:21,076 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 453 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=684, Invalid=3098, Unknown=0, NotChecked=0, Total=3782 [2022-03-18 14:24:21,076 INFO L912 BasicCegarLoop]: 67 mSDtfsCounter, 102 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 14:24:21,077 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1037 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 622 Invalid, 0 Unknown, 81 Unchecked, 0.4s Time] [2022-03-18 14:24:21,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 14:24:21,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 14:24:21,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 14:24:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 14:24:21,078 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 247 [2022-03-18 14:24:21,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:24:21,078 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 14:24:21,078 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 18 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (65), 17 states have call predecessors, (65), 17 states have call successors, (65) [2022-03-18 14:24:21,078 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 14:24:21,078 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 14:24:21,080 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 14:24:21,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-18 14:24:21,295 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 [2022-03-18 14:24:21,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 14:24:38,285 WARN L232 SmtUtils]: Spent 8.76s on a formula simplification. DAG size of input: 263 DAG size of output: 76 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 14:24:48,726 WARN L232 SmtUtils]: Spent 10.43s on a formula simplification. DAG size of input: 268 DAG size of output: 77 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 14:24:55,028 WARN L232 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 280 DAG size of output: 95 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 14:25:04,737 WARN L232 SmtUtils]: Spent 9.71s on a formula simplification. DAG size of input: 266 DAG size of output: 77 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 14:25:16,813 WARN L232 SmtUtils]: Spent 12.07s on a formula simplification. DAG size of input: 269 DAG size of output: 82 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 14:25:29,406 WARN L232 SmtUtils]: Spent 12.58s on a formula simplification. DAG size of input: 269 DAG size of output: 82 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 14:25:29,409 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2022-03-18 14:25:29,409 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2022-03-18 14:25:29,410 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2022-03-18 14:25:29,410 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2022-03-18 14:25:29,410 INFO L882 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2022-03-18 14:25:29,410 INFO L882 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2022-03-18 14:25:29,410 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2022-03-18 14:25:29,410 INFO L878 garLoopResultBuilder]: At program point L35-2(lines 35 73) the Hoare annotation is: (let ((.cse27 (* main_~y~0 main_~r~0)) (.cse26 (* main_~p~0 main_~x~0))) (let ((.cse22 (* main_~q~0 main_~x~0)) (.cse25 (* main_~y~0 main_~s~0)) (.cse5 (= main_~b~0 0)) (.cse28 (+ .cse27 .cse26))) (let ((.cse1 (= main_~a~0 .cse28)) (.cse2 (<= main_~c~0 2)) (.cse15 (<= 0 main_~c~0)) (.cse10 (< main_~b~0 main_~a~0)) (.cse12 (<= 1 main_~x~0)) (.cse8 (<= main_~y~0 2)) (.cse14 (or (= (+ .cse22 main_~a~0 .cse25) .cse28) (not .cse5))) (.cse4 (<= main_~a~0 2)) (.cse9 (<= 1 main_~y~0)) (.cse0 (= main_~b~0 (+ .cse22 .cse25))) (.cse3 (<= main_~b~0 main_~c~0))) (let ((.cse13 (* (- 1) main_~c~0)) (.cse6 (let ((.cse23 (* main_~k~0 main_~y~0 main_~s~0)) (.cse24 (* main_~q~0 main_~k~0 main_~x~0))) (let ((.cse21 (= .cse28 (+ .cse23 main_~c~0 .cse24)))) (let ((.cse16 (or .cse21 .cse3)) (.cse17 (or (not .cse21) (not (= main_~b~0 (* main_~c~0 2))) (= (+ .cse22 (* .cse23 3) (* 3 .cse24) main_~c~0 .cse25) (+ (* 3 .cse26) (* .cse27 3))))) (.cse20 (or .cse0 .cse3))) (or (and .cse10 .cse12 .cse8 .cse14 .cse1 .cse16 .cse17 .cse2 (let ((.cse19 (div main_~c~0 2)) (.cse18 (* main_~v~0 2))) (or (<= .cse18 .cse19) (<= main_~c~0 (+ main_~b~0 .cse19)) (not (<= .cse18 main_~c~0)))) .cse4 (or .cse15 .cse3) .cse20 .cse9) (and .cse10 .cse12 .cse8 .cse14 .cse5 .cse16 .cse17 .cse4 (<= main_~c~0 (+ (div (+ main_~b~0 (- 4)) 2) 2)) .cse20 .cse9)))))) (.cse11 (div (+ 2 (* (- 1) main_~b~0)) 2)) (.cse7 (<= main_~x~0 2))) (or (and .cse0 (= main_~k~0 0) .cse1 (= main_~r~0 1) (= main_~a~0 main_~y~0) (= main_~b~0 main_~x~0) .cse2 .cse3 (< main_~x~0 main_~a~0) .cse4 (<= 1 main_~b~0) (= main_~q~0 1)) (and .cse5 .cse6 (= main_~c~0 0) .cse7) (and .cse8 (= main_~s~0 1) .cse1 (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse9 (= main_~a~0 main_~x~0) .cse7 (= main_~p~0 1)) (and .cse10 (< main_~b~0 .cse11) .cse12 .cse8 (< main_~c~0 (div (+ .cse13 2) 2)) .cse14 .cse1 .cse15 (<= 0 main_~b~0) .cse9 .cse7) (and .cse0 (<= main_~c~0 (+ 2 (div (+ .cse13 main_~b~0 (- 4)) 2))) .cse6 (<= main_~a~0 .cse11) .cse7)))))) [2022-03-18 14:25:29,410 INFO L878 garLoopResultBuilder]: At program point L35-3(lines 35 73) the Hoare annotation is: (let ((.cse0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (and (< main_~b~0 main_~a~0) (<= 1 main_~x~0) (<= main_~y~0 2) (= (+ (* main_~q~0 main_~x~0) main_~a~0 (* main_~y~0 main_~s~0)) .cse0) (<= main_~b~0 main_~c~0) (or (= main_~b~0 0) (= main_~a~0 .cse0)) (<= 1 main_~y~0))) [2022-03-18 14:25:29,410 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 18 76) no Hoare annotation was computed. [2022-03-18 14:25:29,411 INFO L878 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (let ((.cse20 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse11 (= main_~d~0 1)) (.cse14 (<= main_~a~0 2)) (.cse16 (= main_~c~0 .cse20)) (.cse17 (<= main_~c~0 (div (+ 2 (* (- 1) main_~b~0)) 2))) (.cse0 (= main_~v~0 (* main_~d~0 main_~b~0))) (.cse15 (<= main_~x~0 2)) (.cse1 (= main_~c~0 main_~a~0)) (.cse2 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0)))) (.cse18 (= main_~v~0 (* main_~b~0 2))) (.cse3 (<= 1 main_~x~0)) (.cse4 (<= main_~y~0 2)) (.cse5 (= main_~k~0 0)) (.cse6 (= main_~a~0 .cse20)) (.cse7 (= main_~r~0 1)) (.cse8 (= main_~a~0 main_~y~0)) (.cse9 (< main_~b~0 main_~c~0)) (.cse10 (= main_~b~0 main_~x~0)) (.cse19 (= main_~d~0 2)) (.cse12 (= main_~q~0 1)) (.cse13 (<= 1 main_~y~0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse9 (<= main_~v~0 (* main_~b~0 4)) .cse14 .cse13 (<= main_~b~0 (div (div main_~c~0 2) 2)) .cse15) (and .cse0 .cse2 .cse3 .cse4 .cse5 .cse6 .cse11 .cse14 .cse13 .cse16 (< main_~v~0 main_~c~0) .cse17 .cse15) (and .cse2 .cse18 .cse3 .cse4 .cse5 .cse6 .cse9 .cse19 .cse14 .cse13 .cse16 .cse17 .cse15) (and .cse0 (or (<= (+ main_~b~0 main_~v~0) main_~c~0) (= main_~c~0 main_~v~0)) .cse5 (= main_~s~0 1) .cse6 (= main_~b~0 main_~y~0) (<= main_~b~0 main_~c~0) (= main_~q~0 0) .cse13 (= main_~a~0 main_~x~0) (= main_~c~0 main_~x~0) .cse15 (= main_~p~0 1)) (and .cse1 .cse2 .cse18 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse19 .cse12 .cse13)))) [2022-03-18 14:25:29,411 INFO L882 garLoopResultBuilder]: For program point L36(lines 36 37) no Hoare annotation was computed. [2022-03-18 14:25:29,411 INFO L878 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 2)) [2022-03-18 14:25:29,411 INFO L878 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~y~0) (<= main_~y~0 2) (<= 0 main_~x~0) (<= main_~x~0 2)) [2022-03-18 14:25:29,411 INFO L882 garLoopResultBuilder]: For program point L53(lines 49 59) no Hoare annotation was computed. [2022-03-18 14:25:29,411 INFO L878 garLoopResultBuilder]: At program point L49-2(lines 49 59) the Hoare annotation is: (let ((.cse21 (<= main_~b~0 main_~c~0)) (.cse22 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse19 (= main_~d~0 1)) (.cse11 (= main_~c~0 .cse22)) (.cse12 (<= main_~c~0 (div (+ 2 (* (- 1) main_~b~0)) 2))) (.cse7 (or (= .cse22 (+ (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0))) .cse21)) (.cse9 (<= main_~a~0 2)) (.cse14 (= main_~v~0 (* main_~d~0 main_~b~0))) (.cse13 (<= main_~x~0 2)) (.cse0 (= main_~c~0 main_~a~0)) (.cse1 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0)))) (.cse2 (= main_~v~0 (* main_~b~0 2))) (.cse3 (<= 1 main_~x~0)) (.cse4 (<= main_~y~0 2)) (.cse5 (= main_~k~0 0)) (.cse15 (= main_~a~0 .cse22)) (.cse16 (= main_~r~0 1)) (.cse17 (= main_~a~0 main_~y~0)) (.cse6 (< main_~b~0 main_~c~0)) (.cse18 (= main_~b~0 main_~x~0)) (.cse8 (= main_~d~0 2)) (.cse20 (= main_~q~0 1)) (.cse10 (<= 1 main_~y~0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13) (and .cse14 .cse0 .cse1 .cse3 .cse4 .cse5 .cse15 .cse16 .cse17 .cse6 .cse18 .cse19 .cse20 .cse10) (and .cse14 .cse1 .cse3 .cse4 .cse5 .cse15 .cse19 .cse9 .cse10 .cse11 (< main_~v~0 main_~c~0) .cse12 .cse13) (and .cse14 .cse0 .cse1 .cse3 .cse4 .cse5 .cse15 .cse6 .cse7 (<= main_~v~0 (* main_~b~0 4)) .cse9 .cse10 (<= main_~b~0 (div (div main_~c~0 2) 2)) .cse13) (and .cse14 (or (<= (+ main_~b~0 main_~v~0) main_~c~0) (= main_~c~0 main_~v~0)) .cse5 (= main_~s~0 1) .cse15 (= main_~b~0 main_~y~0) .cse21 (= main_~q~0 0) .cse10 (= main_~a~0 main_~x~0) (= main_~c~0 main_~x~0) .cse13 (= main_~p~0 1)) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse15 .cse16 .cse17 .cse6 .cse18 .cse8 .cse20 .cse10)))) [2022-03-18 14:25:29,411 INFO L882 garLoopResultBuilder]: For program point L49-3(lines 49 59) no Hoare annotation was computed. [2022-03-18 14:25:29,411 INFO L882 garLoopResultBuilder]: For program point L74(line 74) no Hoare annotation was computed. [2022-03-18 14:25:29,411 INFO L878 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 0 main_~y~0) (<= 1 main_~x~0) (<= main_~y~0 2) (<= main_~x~0 2)) [2022-03-18 14:25:29,412 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse21 (<= main_~b~0 main_~c~0)) (.cse22 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse19 (= main_~d~0 1)) (.cse11 (= main_~c~0 .cse22)) (.cse12 (<= main_~c~0 (div (+ 2 (* (- 1) main_~b~0)) 2))) (.cse7 (or (= .cse22 (+ (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0))) .cse21)) (.cse9 (<= main_~a~0 2)) (.cse14 (= main_~v~0 (* main_~d~0 main_~b~0))) (.cse13 (<= main_~x~0 2)) (.cse0 (= main_~c~0 main_~a~0)) (.cse1 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0)))) (.cse2 (= main_~v~0 (* main_~b~0 2))) (.cse3 (<= 1 main_~x~0)) (.cse4 (<= main_~y~0 2)) (.cse5 (= main_~k~0 0)) (.cse15 (= main_~a~0 .cse22)) (.cse16 (= main_~r~0 1)) (.cse17 (= main_~a~0 main_~y~0)) (.cse6 (< main_~b~0 main_~c~0)) (.cse18 (= main_~b~0 main_~x~0)) (.cse8 (= main_~d~0 2)) (.cse20 (= main_~q~0 1)) (.cse10 (<= 1 main_~y~0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13) (and .cse14 .cse0 .cse1 .cse3 .cse4 .cse5 .cse15 .cse16 .cse17 .cse6 .cse18 .cse19 .cse20 .cse10) (and .cse14 .cse1 .cse3 .cse4 .cse5 .cse15 .cse19 .cse9 .cse10 .cse11 (< main_~v~0 main_~c~0) .cse12 .cse13) (and .cse14 .cse0 .cse1 .cse3 .cse4 .cse5 .cse15 .cse6 .cse7 (<= main_~v~0 (* main_~b~0 4)) .cse9 .cse10 (<= main_~b~0 (div (div main_~c~0 2) 2)) .cse13) (and .cse14 (or (<= (+ main_~b~0 main_~v~0) main_~c~0) (= main_~c~0 main_~v~0)) .cse5 (= main_~s~0 1) .cse15 (= main_~b~0 main_~y~0) .cse21 (= main_~q~0 0) .cse10 (= main_~a~0 main_~x~0) (= main_~c~0 main_~x~0) .cse13 (= main_~p~0 1)) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse15 .cse16 .cse17 .cse6 .cse18 .cse8 .cse20 .cse10)))) [2022-03-18 14:25:29,412 INFO L878 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: (let ((.cse19 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse11 (= main_~d~0 1)) (.cse0 (= main_~v~0 (* main_~d~0 main_~b~0))) (.cse14 (<= main_~a~0 2)) (.cse16 (= main_~c~0 .cse19)) (.cse17 (<= main_~c~0 (div (+ 2 (* (- 1) main_~b~0)) 2))) (.cse15 (<= main_~x~0 2)) (.cse1 (= main_~c~0 main_~a~0)) (.cse2 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0)))) (.cse18 (= main_~v~0 (* main_~b~0 2))) (.cse3 (<= 1 main_~x~0)) (.cse4 (<= main_~y~0 2)) (.cse5 (= main_~k~0 0)) (.cse6 (= main_~a~0 .cse19)) (.cse7 (= main_~r~0 1)) (.cse8 (= main_~a~0 main_~y~0)) (.cse9 (< main_~b~0 main_~c~0)) (.cse10 (= main_~b~0 main_~x~0)) (.cse12 (= main_~q~0 1)) (.cse13 (<= 1 main_~y~0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse9 (<= main_~v~0 (* main_~b~0 4)) .cse14 .cse13 (<= main_~b~0 (div (div main_~c~0 2) 2)) .cse15) (and .cse0 .cse2 .cse3 .cse4 .cse5 .cse6 .cse11 .cse14 .cse13 .cse16 (< main_~v~0 main_~c~0) .cse17 .cse15) (and .cse0 (or (<= (+ main_~b~0 main_~v~0) main_~c~0) (= main_~c~0 main_~v~0)) .cse5 (= main_~s~0 1) .cse6 (= main_~b~0 main_~y~0) (<= main_~b~0 main_~c~0) (= main_~q~0 0) .cse13 (= main_~a~0 main_~x~0) (= main_~c~0 main_~x~0) .cse15 (= main_~p~0 1)) (and .cse0 .cse2 .cse18 .cse3 .cse4 .cse5 .cse6 .cse9 .cse14 .cse13 .cse16 .cse17 .cse15) (and .cse1 .cse2 .cse18 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 (= main_~d~0 2) .cse12 .cse13)))) [2022-03-18 14:25:29,412 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 18 76) no Hoare annotation was computed. [2022-03-18 14:25:29,412 INFO L878 garLoopResultBuilder]: At program point L42-2(lines 42 62) the Hoare annotation is: (let ((.cse2 (* main_~b~0 2)) (.cse23 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse3 (<= 1 main_~x~0)) (.cse0 (= main_~v~0 (* main_~d~0 main_~b~0))) (.cse5 (= main_~a~0 .cse23)) (.cse8 (= main_~k~0 2)) (.cse12 (= (+ main_~c~0 .cse2) .cse23)) (.cse4 (<= main_~y~0 2)) (.cse13 (= main_~s~0 1)) (.cse14 (<= 1 main_~a~0)) (.cse15 (= main_~b~0 main_~y~0)) (.cse16 (= main_~q~0 0)) (.cse10 (<= 1 main_~y~0)) (.cse17 (= main_~a~0 main_~x~0)) (.cse11 (<= main_~x~0 2)) (.cse18 (= main_~p~0 1)) (.cse1 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0)))) (.cse19 (= main_~k~0 0)) (.cse6 (= main_~r~0 1)) (.cse7 (= main_~a~0 main_~y~0)) (.cse20 (< main_~b~0 main_~c~0)) (.cse21 (<= main_~a~0 2)) (.cse9 (= main_~q~0 1)) (.cse22 (= main_~c~0 .cse23))) (or (and (< main_~b~0 main_~a~0) .cse0 .cse1 (= main_~v~0 .cse2) .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 (< main_~c~0 main_~b~0) .cse9 .cse10 .cse11 .cse12) (and .cse0 (= main_~x~0 (+ main_~c~0 main_~b~0)) .cse4 .cse13 .cse5 .cse14 (<= 0 main_~c~0) .cse15 (= main_~k~0 1) (not (<= main_~b~0 main_~c~0)) .cse16 .cse10 .cse17 .cse11 .cse18) (and (= main_~c~0 main_~a~0) .cse1 .cse3 .cse4 .cse19 .cse5 .cse20 .cse21 .cse10 (<= main_~c~0 (div (+ 2 (* (- 1) main_~b~0)) 2)) .cse11) (and .cse0 (or (<= main_~b~0 1) (<= main_~c~0 (+ (div (+ (* (- 1) main_~c~0) main_~b~0 (- 8)) 2) (* main_~v~0 3) 4))) .cse4 .cse13 .cse5 (<= (div (* (- 1) main_~v~0) (- 2)) main_~b~0) .cse14 .cse15 .cse8 .cse16 .cse10 .cse17 .cse11 .cse12 .cse18) (and .cse4 .cse19 .cse13 .cse14 .cse15 .cse16 .cse10 .cse22 .cse17 (= main_~c~0 main_~x~0) .cse11 .cse18) (and .cse1 .cse19 .cse6 .cse7 .cse20 (= main_~b~0 main_~x~0) (<= main_~c~0 2) (< main_~x~0 main_~a~0) .cse21 (<= 1 main_~b~0) .cse9 .cse22)))) [2022-03-18 14:25:29,412 INFO L882 garLoopResultBuilder]: For program point L42-3(lines 42 62) no Hoare annotation was computed. [2022-03-18 14:25:29,412 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 18 76) the Hoare annotation is: true [2022-03-18 14:25:29,412 INFO L882 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2022-03-18 14:25:29,412 INFO L885 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2022-03-18 14:25:29,412 INFO L882 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2022-03-18 14:25:29,413 INFO L878 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (let ((.cse20 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse11 (= main_~d~0 1)) (.cse14 (<= main_~a~0 2)) (.cse16 (= main_~c~0 .cse20)) (.cse17 (<= main_~c~0 (div (+ 2 (* (- 1) main_~b~0)) 2))) (.cse0 (= main_~v~0 (* main_~d~0 main_~b~0))) (.cse15 (<= main_~x~0 2)) (.cse1 (= main_~c~0 main_~a~0)) (.cse2 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0)))) (.cse18 (= main_~v~0 (* main_~b~0 2))) (.cse3 (<= 1 main_~x~0)) (.cse4 (<= main_~y~0 2)) (.cse5 (= main_~k~0 0)) (.cse6 (= main_~a~0 .cse20)) (.cse7 (= main_~r~0 1)) (.cse8 (= main_~a~0 main_~y~0)) (.cse9 (< main_~b~0 main_~c~0)) (.cse10 (= main_~b~0 main_~x~0)) (.cse19 (= main_~d~0 2)) (.cse12 (= main_~q~0 1)) (.cse13 (<= 1 main_~y~0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse9 (<= main_~v~0 (* main_~b~0 4)) .cse14 .cse13 (<= main_~b~0 (div (div main_~c~0 2) 2)) .cse15) (and .cse0 .cse2 .cse3 .cse4 .cse5 .cse6 .cse11 .cse14 .cse13 .cse16 (< main_~v~0 main_~c~0) .cse17 .cse15) (and .cse2 .cse18 .cse3 .cse4 .cse5 .cse6 .cse9 .cse19 .cse14 .cse13 .cse16 .cse17 .cse15) (and .cse0 (or (<= (+ main_~b~0 main_~v~0) main_~c~0) (= main_~c~0 main_~v~0)) .cse5 (= main_~s~0 1) .cse6 (= main_~b~0 main_~y~0) (<= main_~b~0 main_~c~0) (= main_~q~0 0) .cse13 (= main_~a~0 main_~x~0) (= main_~c~0 main_~x~0) .cse15 (= main_~p~0 1)) (and .cse1 .cse2 .cse18 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse19 .cse12 .cse13)))) [2022-03-18 14:25:29,413 INFO L882 garLoopResultBuilder]: For program point L43(lines 43 44) no Hoare annotation was computed. [2022-03-18 14:25:29,413 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-18 14:25:29,413 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-18 14:25:29,413 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-18 14:25:29,413 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-18 14:25:29,413 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-18 14:25:29,413 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 14:25:29,413 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-18 14:25:29,413 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2022-03-18 14:25:29,413 INFO L882 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2022-03-18 14:25:29,414 INFO L882 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2022-03-18 14:25:29,414 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2022-03-18 14:25:29,414 INFO L882 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2022-03-18 14:25:29,414 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2022-03-18 14:25:29,416 INFO L718 BasicCegarLoop]: Path program histogram: [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:25:29,417 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 14:25:29,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 02:25:29 BoogieIcfgContainer [2022-03-18 14:25:29,438 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 14:25:29,439 INFO L158 Benchmark]: Toolchain (without parser) took 153216.83ms. Allocated memory was 179.3MB in the beginning and 312.5MB in the end (delta: 133.2MB). Free memory was 129.5MB in the beginning and 232.4MB in the end (delta: -102.8MB). Peak memory consumption was 161.3MB. Max. memory is 8.0GB. [2022-03-18 14:25:29,439 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 179.3MB. Free memory was 146.2MB in the beginning and 146.1MB in the end (delta: 88.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 14:25:29,439 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.58ms. Allocated memory is still 179.3MB. Free memory was 129.4MB in the beginning and 158.1MB in the end (delta: -28.7MB). Peak memory consumption was 14.3MB. Max. memory is 8.0GB. [2022-03-18 14:25:29,440 INFO L158 Benchmark]: Boogie Preprocessor took 23.60ms. Allocated memory is still 179.3MB. Free memory was 158.1MB in the beginning and 156.8MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 14:25:29,440 INFO L158 Benchmark]: RCFGBuilder took 315.99ms. Allocated memory is still 179.3MB. Free memory was 156.8MB in the beginning and 145.0MB in the end (delta: 11.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 14:25:29,440 INFO L158 Benchmark]: TraceAbstraction took 152644.83ms. Allocated memory was 179.3MB in the beginning and 312.5MB in the end (delta: 133.2MB). Free memory was 144.2MB in the beginning and 232.4MB in the end (delta: -88.1MB). Peak memory consumption was 176.4MB. Max. memory is 8.0GB. [2022-03-18 14:25:29,441 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 179.3MB. Free memory was 146.2MB in the beginning and 146.1MB in the end (delta: 88.3kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 228.58ms. Allocated memory is still 179.3MB. Free memory was 129.4MB in the beginning and 158.1MB in the end (delta: -28.7MB). Peak memory consumption was 14.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.60ms. Allocated memory is still 179.3MB. Free memory was 158.1MB in the beginning and 156.8MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 315.99ms. Allocated memory is still 179.3MB. Free memory was 156.8MB in the beginning and 145.0MB in the end (delta: 11.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 152644.83ms. Allocated memory was 179.3MB in the beginning and 312.5MB in the end (delta: 133.2MB). Free memory was 144.2MB in the beginning and 232.4MB in the end (delta: -88.1MB). Peak memory consumption was 176.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 152.5s, OverallIterations: 22, TraceHistogramMax: 33, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 56.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 68.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 1622 SdHoareTripleChecker+Valid, 32.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1565 mSDsluCounter, 8549 SdHoareTripleChecker+Invalid, 31.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 117 IncrementalHoareTripleChecker+Unchecked, 7409 mSDsCounter, 2359 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7400 IncrementalHoareTripleChecker+Invalid, 9877 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2359 mSolverCounterUnsat, 1140 mSDtfsCounter, 7400 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3449 GetRequests, 2860 SyntacticMatches, 18 SemanticMatches, 571 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4786 ImplicationChecksByTransitivity, 28.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=494occurred in iteration=18, InterpolantAutomatonStates: 368, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 22 MinimizatonAttempts, 362 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 484 PreInvPairs, 593 NumberOfFragments, 3159 HoareAnnotationTreeSize, 484 FomulaSimplifications, 33377 FormulaSimplificationTreeSizeReduction, 2.2s HoareSimplificationTime, 18 FomulaSimplificationsInter, 53923 FormulaSimplificationTreeSizeReductionInter, 65.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 19.7s InterpolantComputationTime, 1801 NumberOfCodeBlocks, 1703 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 3044 ConstructedInterpolants, 21 QuantifiedInterpolants, 17266 SizeOfPredicates, 155 NumberOfNonLiveVariables, 4409 ConjunctsInSsa, 534 ConjunctsInUnsatCore, 36 InterpolantComputations, 7 PerfectInterpolantSequences, 9819/10882 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (((((((((((((((((c == a && b == q * x + y * s) && v == b * 2) && 1 <= x) && y <= 2) && k == 0) && b < c) && (y * r + p * x == k * y * s + c + q * k * x || b <= c)) && d == 2) && a <= 2) && 1 <= y) && c == y * r + p * x) && c <= (2 + -1 * b) / 2) && x <= 2) || (((((((((((((v == d * b && c == a) && b == q * x + y * s) && 1 <= x) && y <= 2) && k == 0) && a == y * r + p * x) && r == 1) && a == y) && b < c) && b == x) && d == 1) && q == 1) && 1 <= y)) || ((((((((((((v == d * b && b == q * x + y * s) && 1 <= x) && y <= 2) && k == 0) && a == y * r + p * x) && d == 1) && a <= 2) && 1 <= y) && c == y * r + p * x) && v < c) && c <= (2 + -1 * b) / 2) && x <= 2)) || (((((((((((((v == d * b && c == a) && b == q * x + y * s) && 1 <= x) && y <= 2) && k == 0) && a == y * r + p * x) && b < c) && (y * r + p * x == k * y * s + c + q * k * x || b <= c)) && v <= b * 4) && a <= 2) && 1 <= y) && b <= c / 2 / 2) && x <= 2)) || ((((((((((((v == d * b && (b + v <= c || c == v)) && k == 0) && s == 1) && a == y * r + p * x) && b == y) && b <= c) && q == 0) && 1 <= y) && a == x) && c == x) && x <= 2) && p == 1)) || (((((((((((((c == a && b == q * x + y * s) && v == b * 2) && 1 <= x) && y <= 2) && k == 0) && a == y * r + p * x) && r == 1) && a == y) && b < c) && b == x) && d == 2) && q == 1) && 1 <= y) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((((((((((((b == q * x + y * s && k == 0) && a == y * r + p * x) && r == 1) && a == y) && b == x) && c <= 2) && b <= c) && x < a) && a <= 2) && 1 <= b) && q == 1) || (((b == 0 && (((((((((((((b < a && 1 <= x) && y <= 2) && (q * x + a + y * s == y * r + p * x || !(b == 0))) && a == y * r + p * x) && (y * r + p * x == k * y * s + c + q * k * x || b <= c)) && ((!(y * r + p * x == k * y * s + c + q * k * x) || !(b == c * 2)) || q * x + k * y * s * 3 + 3 * (q * k * x) + c + y * s == 3 * (p * x) + y * r * 3)) && c <= 2) && ((v * 2 <= c / 2 || c <= b + c / 2) || !(v * 2 <= c))) && a <= 2) && (0 <= c || b <= c)) && (b == q * x + y * s || b <= c)) && 1 <= y) || ((((((((((b < a && 1 <= x) && y <= 2) && (q * x + a + y * s == y * r + p * x || !(b == 0))) && b == 0) && (y * r + p * x == k * y * s + c + q * k * x || b <= c)) && ((!(y * r + p * x == k * y * s + c + q * k * x) || !(b == c * 2)) || q * x + k * y * s * 3 + 3 * (q * k * x) + c + y * s == 3 * (p * x) + y * r * 3)) && a <= 2) && c <= (b + -4) / 2 + 2) && (b == q * x + y * s || b <= c)) && 1 <= y))) && c == 0) && x <= 2)) || (((((((((y <= 2 && s == 1) && a == y * r + p * x) && 1 <= a) && b == y) && q == 0) && 1 <= y) && a == x) && x <= 2) && p == 1)) || ((((((((((b < a && b < (2 + -1 * b) / 2) && 1 <= x) && y <= 2) && c < (-1 * c + 2) / 2) && (q * x + a + y * s == y * r + p * x || !(b == 0))) && a == y * r + p * x) && 0 <= c) && 0 <= b) && 1 <= y) && x <= 2)) || ((((b == q * x + y * s && c <= 2 + (-1 * c + b + -4) / 2) && (((((((((((((b < a && 1 <= x) && y <= 2) && (q * x + a + y * s == y * r + p * x || !(b == 0))) && a == y * r + p * x) && (y * r + p * x == k * y * s + c + q * k * x || b <= c)) && ((!(y * r + p * x == k * y * s + c + q * k * x) || !(b == c * 2)) || q * x + k * y * s * 3 + 3 * (q * k * x) + c + y * s == 3 * (p * x) + y * r * 3)) && c <= 2) && ((v * 2 <= c / 2 || c <= b + c / 2) || !(v * 2 <= c))) && a <= 2) && (0 <= c || b <= c)) && (b == q * x + y * s || b <= c)) && 1 <= y) || ((((((((((b < a && 1 <= x) && y <= 2) && (q * x + a + y * s == y * r + p * x || !(b == 0))) && b == 0) && (y * r + p * x == k * y * s + c + q * k * x || b <= c)) && ((!(y * r + p * x == k * y * s + c + q * k * x) || !(b == c * 2)) || q * x + k * y * s * 3 + 3 * (q * k * x) + c + y * s == 3 * (p * x) + y * r * 3)) && a <= 2) && c <= (b + -4) / 2 + 2) && (b == q * x + y * s || b <= c)) && 1 <= y))) && a <= (2 + -1 * b) / 2) && x <= 2) - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: ((((((((((((((((((b < a && v == d * b) && b == q * x + y * s) && v == b * 2) && 1 <= x) && y <= 2) && a == y * r + p * x) && r == 1) && a == y) && k == 2) && c < b) && q == 1) && 1 <= y) && x <= 2) && c + b * 2 == y * r + p * x) || ((((((((((((((v == d * b && x == c + b) && y <= 2) && s == 1) && a == y * r + p * x) && 1 <= a) && 0 <= c) && b == y) && k == 1) && !(b <= c)) && q == 0) && 1 <= y) && a == x) && x <= 2) && p == 1)) || ((((((((((c == a && b == q * x + y * s) && 1 <= x) && y <= 2) && k == 0) && a == y * r + p * x) && b < c) && a <= 2) && 1 <= y) && c <= (2 + -1 * b) / 2) && x <= 2)) || ((((((((((((((v == d * b && (b <= 1 || c <= (-1 * c + b + -8) / 2 + v * 3 + 4)) && y <= 2) && s == 1) && a == y * r + p * x) && -1 * v / -2 <= b) && 1 <= a) && b == y) && k == 2) && q == 0) && 1 <= y) && a == x) && x <= 2) && c + b * 2 == y * r + p * x) && p == 1)) || (((((((((((y <= 2 && k == 0) && s == 1) && 1 <= a) && b == y) && q == 0) && 1 <= y) && c == y * r + p * x) && a == x) && c == x) && x <= 2) && p == 1)) || (((((((((((b == q * x + y * s && k == 0) && r == 1) && a == y) && b < c) && b == x) && c <= 2) && x < a) && a <= 2) && 1 <= b) && q == 1) && c == y * r + p * x) RESULT: Ultimate proved your program to be correct! [2022-03-18 14:25:29,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...