/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/prodbin-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 01:59:22,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 01:59:22,662 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 01:59:22,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 01:59:22,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 01:59:22,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 01:59:22,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 01:59:22,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 01:59:22,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 01:59:22,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 01:59:22,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 01:59:22,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 01:59:22,744 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 01:59:22,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 01:59:22,749 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 01:59:22,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 01:59:22,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 01:59:22,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 01:59:22,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 01:59:22,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 01:59:22,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 01:59:22,767 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-20 01:59:22,797 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 01:59:22,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 01:59:22,798 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-20 01:59:22,798 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-20 01:59:22,798 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 01:59:22,798 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 01:59:22,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 01:59:22,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 01:59:22,799 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 01:59:22,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 01:59:22,800 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 01:59:22,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 01:59:22,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 01:59:22,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 01:59:22,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 01:59:22,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 01:59:22,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 01:59:22,802 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 01:59:22,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 01:59:22,802 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 01:59:22,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 01:59:22,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 01:59:22,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 01:59:22,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 01:59:22,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 01:59:22,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 01:59:22,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 01:59:22,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 01:59:22,804 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 01:59:22,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 01:59:22,804 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-20 01:59:22,804 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-20 01:59:22,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 01:59:22,804 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 01:59:23,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 01:59:23,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 01:59:23,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 01:59:23,093 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 01:59:23,094 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 01:59:23,095 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound50.c [2022-03-20 01:59:23,155 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c77c9a12/0bf83d80f310448a863a678307631418/FLAG6914f5236 [2022-03-20 01:59:23,525 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 01:59:23,526 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound50.c [2022-03-20 01:59:23,531 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c77c9a12/0bf83d80f310448a863a678307631418/FLAG6914f5236 [2022-03-20 01:59:23,545 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c77c9a12/0bf83d80f310448a863a678307631418 [2022-03-20 01:59:23,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 01:59:23,548 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 01:59:23,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 01:59:23,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 01:59:23,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 01:59:23,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:59:23" (1/1) ... [2022-03-20 01:59:23,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49e85ae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:59:23, skipping insertion in model container [2022-03-20 01:59:23,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:59:23" (1/1) ... [2022-03-20 01:59:23,564 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 01:59:23,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 01:59:23,729 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/prodbin-ll_valuebound50.c[537,550] [2022-03-20 01:59:23,748 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 01:59:23,755 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 01:59:23,767 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/prodbin-ll_valuebound50.c[537,550] [2022-03-20 01:59:23,783 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 01:59:23,794 INFO L208 MainTranslator]: Completed translation [2022-03-20 01:59:23,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:59:23 WrapperNode [2022-03-20 01:59:23,795 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 01:59:23,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 01:59:23,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 01:59:23,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 01:59:23,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:59:23" (1/1) ... [2022-03-20 01:59:23,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:59:23" (1/1) ... [2022-03-20 01:59:23,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:59:23" (1/1) ... [2022-03-20 01:59:23,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:59:23" (1/1) ... [2022-03-20 01:59:23,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:59:23" (1/1) ... [2022-03-20 01:59:23,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:59:23" (1/1) ... [2022-03-20 01:59:23,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:59:23" (1/1) ... [2022-03-20 01:59:23,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 01:59:23,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 01:59:23,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 01:59:23,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 01:59:23,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:59:23" (1/1) ... [2022-03-20 01:59:23,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 01:59:23,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:59:23,864 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 01:59:23,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 01:59:23,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 01:59:23,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 01:59:23,905 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 01:59:23,905 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 01:59:23,906 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 01:59:23,906 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 01:59:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 01:59:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 01:59:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 01:59:23,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 01:59:23,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 01:59:23,907 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 01:59:23,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 01:59:23,907 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 01:59:23,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 01:59:23,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 01:59:23,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 01:59:23,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 01:59:23,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 01:59:23,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 01:59:23,967 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 01:59:23,969 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 01:59:24,109 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 01:59:24,114 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 01:59:24,114 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 01:59:24,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:59:24 BoogieIcfgContainer [2022-03-20 01:59:24,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 01:59:24,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 01:59:24,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 01:59:24,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 01:59:24,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 01:59:23" (1/3) ... [2022-03-20 01:59:24,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f94827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:59:24, skipping insertion in model container [2022-03-20 01:59:24,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:59:23" (2/3) ... [2022-03-20 01:59:24,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f94827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:59:24, skipping insertion in model container [2022-03-20 01:59:24,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:59:24" (3/3) ... [2022-03-20 01:59:24,140 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound50.c [2022-03-20 01:59:24,145 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 01:59:24,145 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 01:59:24,190 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 01:59:24,196 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 01:59:24,196 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 01:59:24,217 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 01:59:24,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 01:59:24,222 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:59:24,222 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:59:24,223 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:59:24,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:59:24,227 INFO L85 PathProgramCache]: Analyzing trace with hash -589322634, now seen corresponding path program 1 times [2022-03-20 01:59:24,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:59:24,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336364663] [2022-03-20 01:59:24,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:59:24,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:59:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:59:24,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 01:59:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:59:24,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 01:59:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:59:24,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 01:59:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:59:24,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 01:59:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:59:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 01:59:24,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:59:24,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336364663] [2022-03-20 01:59:24,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336364663] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 01:59:24,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 01:59:24,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 01:59:24,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245942772] [2022-03-20 01:59:24,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:59:24,436 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 01:59:24,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:59:24,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 01:59:24,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 01:59:24,465 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 01:59:24,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:59:24,523 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2022-03-20 01:59:24,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 01:59:24,525 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-20 01:59:24,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:59:24,531 INFO L225 Difference]: With dead ends: 57 [2022-03-20 01:59:24,532 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 01:59:24,534 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 01:59:24,537 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 01:59:24,538 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 01:59:24,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 01:59:24,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 01:59:24,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 01:59:24,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-03-20 01:59:24,577 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2022-03-20 01:59:24,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:59:24,577 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-03-20 01:59:24,577 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 01:59:24,577 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-03-20 01:59:24,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 01:59:24,579 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:59:24,579 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:59:24,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 01:59:24,579 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:59:24,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:59:24,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1736242504, now seen corresponding path program 1 times [2022-03-20 01:59:24,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:59:24,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372492278] [2022-03-20 01:59:24,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:59:24,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:59:24,605 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:59:24,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326423506] [2022-03-20 01:59:24,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:59:24,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:59:24,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:59:24,608 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:59:24,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 01:59:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:59:24,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 01:59:24,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:59:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 01:59:24,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 01:59:24,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:59:24,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372492278] [2022-03-20 01:59:24,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:59:24,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326423506] [2022-03-20 01:59:24,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326423506] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 01:59:24,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 01:59:24,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 01:59:24,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249776153] [2022-03-20 01:59:24,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:59:24,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 01:59:24,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:59:24,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 01:59:24,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 01:59:24,790 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 01:59:24,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:59:24,877 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-03-20 01:59:24,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 01:59:24,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-20 01:59:24,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:59:24,880 INFO L225 Difference]: With dead ends: 39 [2022-03-20 01:59:24,880 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 01:59:24,880 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 01:59:24,881 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 01:59:24,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 94 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 01:59:24,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 01:59:24,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-03-20 01:59:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 01:59:24,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-03-20 01:59:24,889 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2022-03-20 01:59:24,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:59:24,890 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-03-20 01:59:24,891 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 01:59:24,891 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-03-20 01:59:24,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 01:59:24,894 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:59:24,895 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:59:24,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 01:59:25,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:59:25,104 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:59:25,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:59:25,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1911690432, now seen corresponding path program 1 times [2022-03-20 01:59:25,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:59:25,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898131256] [2022-03-20 01:59:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:59:25,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:59:25,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:59:25,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382634371] [2022-03-20 01:59:25,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:59:25,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:59:25,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:59:25,122 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:59:25,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 01:59:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:59:25,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 01:59:25,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:59:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 01:59:25,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 01:59:25,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:59:25,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898131256] [2022-03-20 01:59:25,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:59:25,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382634371] [2022-03-20 01:59:25,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382634371] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 01:59:25,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 01:59:25,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 01:59:25,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203476785] [2022-03-20 01:59:25,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:59:25,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 01:59:25,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:59:25,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 01:59:25,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 01:59:25,309 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 01:59:25,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:59:25,383 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-03-20 01:59:25,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 01:59:25,383 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-20 01:59:25,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:59:25,386 INFO L225 Difference]: With dead ends: 43 [2022-03-20 01:59:25,386 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 01:59:25,387 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 01:59:25,389 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 01:59:25,391 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 99 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 01:59:25,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 01:59:25,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-03-20 01:59:25,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 01:59:25,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-03-20 01:59:25,403 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2022-03-20 01:59:25,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:59:25,404 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-03-20 01:59:25,404 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 01:59:25,404 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-03-20 01:59:25,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 01:59:25,405 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:59:25,409 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:59:25,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 01:59:25,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 01:59:25,632 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:59:25,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:59:25,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2022075506, now seen corresponding path program 1 times [2022-03-20 01:59:25,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:59:25,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791006644] [2022-03-20 01:59:25,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:59:25,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:59:25,654 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:59:25,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115125568] [2022-03-20 01:59:25,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:59:25,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:59:25,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:59:25,658 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:59:25,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 01:59:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:59:25,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 01:59:25,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:59:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 01:59:26,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:59:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 01:59:33,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:59:33,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791006644] [2022-03-20 01:59:33,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:59:33,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115125568] [2022-03-20 01:59:33,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115125568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:59:33,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:59:33,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-20 01:59:33,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992141009] [2022-03-20 01:59:33,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:59:33,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 01:59:33,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:59:33,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 01:59:33,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-20 01:59:33,693 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 01:59:36,382 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:59:39,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:59:39,619 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-03-20 01:59:39,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 01:59:39,620 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2022-03-20 01:59:39,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:59:39,622 INFO L225 Difference]: With dead ends: 52 [2022-03-20 01:59:39,622 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 01:59:39,623 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-03-20 01:59:39,623 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-20 01:59:39,624 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 210 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-03-20 01:59:39,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 01:59:39,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-03-20 01:59:39,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 01:59:39,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-03-20 01:59:39,631 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 37 [2022-03-20 01:59:39,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:59:39,632 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-03-20 01:59:39,632 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 01:59:39,632 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-03-20 01:59:39,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 01:59:39,633 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:59:39,633 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:59:39,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 01:59:39,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:59:39,844 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:59:39,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:59:39,844 INFO L85 PathProgramCache]: Analyzing trace with hash -497884428, now seen corresponding path program 1 times [2022-03-20 01:59:39,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:59:39,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521740770] [2022-03-20 01:59:39,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:59:39,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:59:39,858 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:59:39,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350238439] [2022-03-20 01:59:39,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:59:39,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:59:39,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:59:39,864 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:59:39,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 01:59:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:59:39,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 01:59:39,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:59:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 01:59:40,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:59:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 01:59:42,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:59:42,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521740770] [2022-03-20 01:59:42,097 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:59:42,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350238439] [2022-03-20 01:59:42,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350238439] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:59:42,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:59:42,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2022-03-20 01:59:42,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801691966] [2022-03-20 01:59:42,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:59:42,098 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 01:59:42,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:59:42,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 01:59:42,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-20 01:59:42,099 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 01:59:43,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:59:43,141 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2022-03-20 01:59:43,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 01:59:43,141 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-03-20 01:59:43,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:59:43,143 INFO L225 Difference]: With dead ends: 78 [2022-03-20 01:59:43,143 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 01:59:43,144 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-03-20 01:59:43,145 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 01:59:43,145 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 164 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 01:59:43,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 01:59:43,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-20 01:59:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.183673469387755) internal successors, (58), 53 states have internal predecessors, (58), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 01:59:43,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2022-03-20 01:59:43,156 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 37 [2022-03-20 01:59:43,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:59:43,157 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2022-03-20 01:59:43,157 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 01:59:43,157 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2022-03-20 01:59:43,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 01:59:43,158 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:59:43,158 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-03-20 01:59:43,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 01:59:43,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:59:43,367 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:59:43,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:59:43,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1351630086, now seen corresponding path program 1 times [2022-03-20 01:59:43,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:59:43,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219001177] [2022-03-20 01:59:43,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:59:43,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:59:43,384 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:59:43,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132459430] [2022-03-20 01:59:43,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:59:43,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:59:43,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:59:43,389 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:59:43,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 01:59:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:59:43,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 01:59:43,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:59:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 01:59:43,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:59:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 01:59:43,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:59:43,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219001177] [2022-03-20 01:59:43,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:59:43,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132459430] [2022-03-20 01:59:43,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132459430] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:59:43,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:59:43,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 01:59:43,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612217263] [2022-03-20 01:59:43,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:59:43,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 01:59:43,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:59:43,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 01:59:43,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 01:59:43,689 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 01:59:45,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:59:45,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:59:45,834 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2022-03-20 01:59:45,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 01:59:45,835 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-03-20 01:59:45,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:59:45,836 INFO L225 Difference]: With dead ends: 77 [2022-03-20 01:59:45,836 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 01:59:45,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-20 01:59:45,837 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 01:59:45,838 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 132 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 01:59:45,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 01:59:45,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-20 01:59:45,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 52 states have internal predecessors, (55), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 01:59:45,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2022-03-20 01:59:45,848 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 43 [2022-03-20 01:59:45,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:59:45,848 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2022-03-20 01:59:45,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 01:59:45,848 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2022-03-20 01:59:45,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 01:59:45,850 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:59:45,850 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:59:45,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 01:59:46,053 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:59:46,054 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:59:46,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:59:46,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1459553868, now seen corresponding path program 1 times [2022-03-20 01:59:46,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:59:46,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347718615] [2022-03-20 01:59:46,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:59:46,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:59:46,065 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:59:46,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833734861] [2022-03-20 01:59:46,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:59:46,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:59:46,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:59:46,068 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:59:46,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 01:59:46,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:59:46,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 01:59:46,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:59:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 01:59:53,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:59:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-20 01:59:58,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:59:58,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347718615] [2022-03-20 01:59:58,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:59:58,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833734861] [2022-03-20 01:59:58,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833734861] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:59:58,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:59:58,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-03-20 01:59:58,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546812226] [2022-03-20 01:59:58,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:59:58,345 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 01:59:58,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:59:58,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 01:59:58,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-03-20 01:59:58,346 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-20 02:00:07,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:00:07,654 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2022-03-20 02:00:07,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 02:00:07,655 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 55 [2022-03-20 02:00:07,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:00:07,656 INFO L225 Difference]: With dead ends: 94 [2022-03-20 02:00:07,656 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 02:00:07,656 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2022-03-20 02:00:07,657 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 32 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-20 02:00:07,657 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 335 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 381 Invalid, 0 Unknown, 27 Unchecked, 3.1s Time] [2022-03-20 02:00:07,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 02:00:07,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 75. [2022-03-20 02:00:07,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 56 states have internal predecessors, (60), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 02:00:07,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2022-03-20 02:00:07,668 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 55 [2022-03-20 02:00:07,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:00:07,669 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2022-03-20 02:00:07,669 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-20 02:00:07,669 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2022-03-20 02:00:07,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 02:00:07,671 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:00:07,671 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:00:07,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 02:00:07,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:00:07,888 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:00:07,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:00:07,888 INFO L85 PathProgramCache]: Analyzing trace with hash -699618950, now seen corresponding path program 2 times [2022-03-20 02:00:07,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:00:07,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085195733] [2022-03-20 02:00:07,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:00:07,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:00:07,898 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:00:07,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480425499] [2022-03-20 02:00:07,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 02:00:07,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:00:07,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:00:07,903 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:00:07,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 02:00:07,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 02:00:07,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:00:07,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-20 02:00:07,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:01:06,561 WARN L232 SmtUtils]: Spent 5.77s on a formula simplification. DAG size of input: 11 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-20 02:02:42,489 WARN L232 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 13 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-20 02:06:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 02:06:03,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:06:29,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:06:29,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085195733] [2022-03-20 02:06:29,803 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:06:29,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480425499] [2022-03-20 02:06:29,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480425499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:06:29,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:06:29,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 02:06:29,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337238101] [2022-03-20 02:06:29,804 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 02:06:29,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 02:06:29,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:06:29,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 02:06:29,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=562, Unknown=8, NotChecked=0, Total=702 [2022-03-20 02:06:29,805 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-20 02:06:31,101 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 02:06:32,532 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 02:06:38,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 02:06:41,710 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 02:06:43,481 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 02:06:45,484 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 02:06:48,005 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 02:06:52,572 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 02:06:55,580 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 02:06:56,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:06:56,976 INFO L93 Difference]: Finished difference Result 103 states and 117 transitions. [2022-03-20 02:06:56,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 02:06:56,977 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 64 [2022-03-20 02:06:56,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:06:56,978 INFO L225 Difference]: With dead ends: 103 [2022-03-20 02:06:56,978 INFO L226 Difference]: Without dead ends: 101 [2022-03-20 02:06:56,978 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=145, Invalid=659, Unknown=8, NotChecked=0, Total=812 [2022-03-20 02:06:56,979 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 23 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:06:56,979 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 309 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 367 Invalid, 2 Unknown, 0 Unchecked, 27.0s Time] [2022-03-20 02:06:56,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-20 02:06:56,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2022-03-20 02:06:56,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 73 states have internal predecessors, (79), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 02:06:56,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2022-03-20 02:06:56,991 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 64 [2022-03-20 02:06:56,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:06:56,991 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2022-03-20 02:06:56,991 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-20 02:06:56,991 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2022-03-20 02:06:56,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 02:06:56,993 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:06:56,993 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:06:57,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 02:06:57,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:06:57,208 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:06:57,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:06:57,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1210816438, now seen corresponding path program 3 times [2022-03-20 02:06:57,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:06:57,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671216972] [2022-03-20 02:06:57,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:06:57,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:06:57,219 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:06:57,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865570325] [2022-03-20 02:06:57,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 02:06:57,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:06:57,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:06:57,227 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:06:57,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 02:06:57,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 02:06:57,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:06:57,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 02:06:57,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:07:00,553 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 02:07:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-03-20 02:07:04,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:07:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-20 02:07:09,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:07:09,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671216972] [2022-03-20 02:07:09,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:07:09,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865570325] [2022-03-20 02:07:09,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865570325] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 02:07:09,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 02:07:09,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-20 02:07:09,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592115136] [2022-03-20 02:07:09,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 02:07:09,144 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 02:07:09,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:07:09,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 02:07:09,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=268, Unknown=3, NotChecked=0, Total=342 [2022-03-20 02:07:09,145 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 02:07:18,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:07:18,710 INFO L93 Difference]: Finished difference Result 125 states and 143 transitions. [2022-03-20 02:07:18,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 02:07:18,710 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 64 [2022-03-20 02:07:18,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:07:18,711 INFO L225 Difference]: With dead ends: 125 [2022-03-20 02:07:18,711 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 02:07:18,712 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=127, Invalid=470, Unknown=3, NotChecked=0, Total=600 [2022-03-20 02:07:18,712 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 23 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:07:18,713 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 220 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 130 Invalid, 0 Unknown, 7 Unchecked, 1.0s Time] [2022-03-20 02:07:18,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 02:07:18,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-20 02:07:18,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 02:07:18,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-03-20 02:07:18,720 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 64 [2022-03-20 02:07:18,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:07:18,720 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-03-20 02:07:18,720 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 02:07:18,720 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-03-20 02:07:18,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 02:07:18,721 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:07:18,721 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:07:18,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 02:07:18,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 02:07:18,935 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:07:18,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:07:18,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1351365048, now seen corresponding path program 2 times [2022-03-20 02:07:18,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:07:18,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41469227] [2022-03-20 02:07:18,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:07:18,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:07:18,946 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:07:18,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399924946] [2022-03-20 02:07:18,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 02:07:18,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:07:18,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:07:18,948 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:07:18,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 02:07:18,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 02:07:18,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:07:18,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 02:07:19,001 INFO L286 TraceCheckSpWp]: Computing forward predicates...