/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/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 15:16:15,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 15:16:15,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 15:16:15,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 15:16:15,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 15:16:15,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 15:16:15,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 15:16:15,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 15:16:15,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 15:16:15,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 15:16:15,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 15:16:15,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 15:16:15,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 15:16:15,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 15:16:15,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 15:16:15,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 15:16:15,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 15:16:15,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 15:16:15,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 15:16:15,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 15:16:15,943 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 15:16:15,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 15:16:15,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 15:16:15,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 15:16:15,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 15:16:15,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 15:16:15,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 15:16:15,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 15:16:15,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 15:16:15,969 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 15:16:15,974 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 15:16:15,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 15:16:15,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 15:16:15,975 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 15:16:15,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 15:16:15,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 15:16:15,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 15:16:15,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 15:16:15,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 15:16:15,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 15:16:15,976 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 15:16:15,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 15:16:15,976 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 15:16:15,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 15:16:15,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 15:16:15,976 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 15:16:15,977 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 15:16:15,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 15:16:15,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 15:16:15,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 15:16:15,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 15:16:15,977 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 15:16:15,977 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 15:16:15,977 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 15:16:15,977 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 15:16:15,977 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 15:16:16,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 15:16:16,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 15:16:16,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 15:16:16,178 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 15:16:16,179 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 15:16:16,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2022-03-20 15:16:16,229 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a2bdaad2/654d9731fead4cd592b023d4de89de2f/FLAG28c28154b [2022-03-20 15:16:16,560 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 15:16:16,560 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2022-03-20 15:16:16,565 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a2bdaad2/654d9731fead4cd592b023d4de89de2f/FLAG28c28154b [2022-03-20 15:16:16,573 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a2bdaad2/654d9731fead4cd592b023d4de89de2f [2022-03-20 15:16:16,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 15:16:16,575 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 15:16:16,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 15:16:16,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 15:16:16,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 15:16:16,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:16:16" (1/1) ... [2022-03-20 15:16:16,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a50d96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:16:16, skipping insertion in model container [2022-03-20 15:16:16,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:16:16" (1/1) ... [2022-03-20 15:16:16,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 15:16:16,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 15:16:16,729 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/fermat1-ll_unwindbound20.c[535,548] [2022-03-20 15:16:16,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 15:16:16,766 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 15:16:16,775 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/fermat1-ll_unwindbound20.c[535,548] [2022-03-20 15:16:16,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 15:16:16,797 INFO L208 MainTranslator]: Completed translation [2022-03-20 15:16:16,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:16:16 WrapperNode [2022-03-20 15:16:16,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 15:16:16,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 15:16:16,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 15:16:16,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 15:16:16,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:16:16" (1/1) ... [2022-03-20 15:16:16,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:16:16" (1/1) ... [2022-03-20 15:16:16,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:16:16" (1/1) ... [2022-03-20 15:16:16,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:16:16" (1/1) ... [2022-03-20 15:16:16,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:16:16" (1/1) ... [2022-03-20 15:16:16,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:16:16" (1/1) ... [2022-03-20 15:16:16,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:16:16" (1/1) ... [2022-03-20 15:16:16,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 15:16:16,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 15:16:16,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 15:16:16,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 15:16:16,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:16:16" (1/1) ... [2022-03-20 15:16:16,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 15:16:16,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:16,870 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 15:16:16,872 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 15:16:16,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 15:16:16,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 15:16:16,903 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 15:16:16,903 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 15:16:16,903 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 15:16:16,903 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 15:16:16,903 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 15:16:16,903 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 15:16:16,904 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 15:16:16,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 15:16:16,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 15:16:16,905 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 15:16:16,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 15:16:16,906 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 15:16:16,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 15:16:16,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 15:16:16,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 15:16:16,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 15:16:16,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 15:16:16,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 15:16:16,952 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 15:16:16,954 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 15:16:17,044 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 15:16:17,048 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 15:16:17,048 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 15:16:17,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:16:17 BoogieIcfgContainer [2022-03-20 15:16:17,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 15:16:17,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 15:16:17,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 15:16:17,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 15:16:17,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:16:16" (1/3) ... [2022-03-20 15:16:17,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13aa1dd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:16:17, skipping insertion in model container [2022-03-20 15:16:17,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:16:16" (2/3) ... [2022-03-20 15:16:17,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13aa1dd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:16:17, skipping insertion in model container [2022-03-20 15:16:17,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:16:17" (3/3) ... [2022-03-20 15:16:17,055 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound20.c [2022-03-20 15:16:17,058 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 15:16:17,058 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 15:16:17,084 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 15:16:17,089 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 15:16:17,089 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 15:16:17,098 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 15:16:17,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 15:16:17,119 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:17,120 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:17,120 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:17,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:17,124 INFO L85 PathProgramCache]: Analyzing trace with hash 928708300, now seen corresponding path program 1 times [2022-03-20 15:16:17,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:17,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [111971213] [2022-03-20 15:16:17,147 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:17,147 INFO L85 PathProgramCache]: Analyzing trace with hash 928708300, now seen corresponding path program 2 times [2022-03-20 15:16:17,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:17,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000812265] [2022-03-20 15:16:17,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:17,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:17,220 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:17,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235541996] [2022-03-20 15:16:17,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:17,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:17,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:17,235 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 15:16:17,241 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 15:16:17,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 15:16:17,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:17,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 1 conjunts are in the unsatisfiable core [2022-03-20 15:16:17,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:17,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 15:16:17,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:16:17,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:17,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000812265] [2022-03-20 15:16:17,358 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:17,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235541996] [2022-03-20 15:16:17,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235541996] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:17,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:17,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-20 15:16:17,361 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:17,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [111971213] [2022-03-20 15:16:17,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [111971213] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:17,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:17,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-20 15:16:17,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093078013] [2022-03-20 15:16:17,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:17,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-03-20 15:16:17,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:17,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-03-20 15:16:17,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-20 15:16:17,407 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 15:16:17,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:17,432 INFO L93 Difference]: Finished difference Result 67 states and 100 transitions. [2022-03-20 15:16:17,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-03-20 15:16:17,435 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-20 15:16:17,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:17,439 INFO L225 Difference]: With dead ends: 67 [2022-03-20 15:16:17,439 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 15:16:17,442 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-20 15:16:17,445 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:17,446 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:16:17,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 15:16:17,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 15:16:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 15:16:17,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-20 15:16:17,470 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2022-03-20 15:16:17,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:17,471 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-20 15:16:17,471 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 15:16:17,471 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-20 15:16:17,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 15:16:17,472 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:17,474 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:17,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:17,677 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-03-20 15:16:17,677 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:17,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:17,678 INFO L85 PathProgramCache]: Analyzing trace with hash -155606603, now seen corresponding path program 1 times [2022-03-20 15:16:17,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:17,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [973829404] [2022-03-20 15:16:17,679 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:17,679 INFO L85 PathProgramCache]: Analyzing trace with hash -155606603, now seen corresponding path program 2 times [2022-03-20 15:16:17,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:17,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621179357] [2022-03-20 15:16:17,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:17,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:17,692 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:17,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074250734] [2022-03-20 15:16:17,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:17,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:17,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:17,694 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 15:16:17,695 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 15:16:17,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 15:16:17,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:17,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 15:16:17,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:17,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:16:17,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:17,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621179357] [2022-03-20 15:16:17,809 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:17,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074250734] [2022-03-20 15:16:17,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074250734] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:17,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:17,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 15:16:17,810 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:17,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [973829404] [2022-03-20 15:16:17,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [973829404] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:17,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:17,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 15:16:17,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786980235] [2022-03-20 15:16:17,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:17,811 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 15:16:17,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:17,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 15:16:17,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 15:16:17,812 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 15:16:17,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:17,825 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-03-20 15:16:17,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 15:16:17,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 15:16:17,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:17,826 INFO L225 Difference]: With dead ends: 41 [2022-03-20 15:16:17,826 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 15:16:17,826 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 15:16:17,827 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:17,827 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:16:17,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 15:16:17,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-20 15:16:17,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 15:16:17,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-03-20 15:16:17,833 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2022-03-20 15:16:17,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:17,834 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-03-20 15:16:17,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 15:16:17,834 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-03-20 15:16:17,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 15:16:17,835 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:17,835 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:17,855 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 15:16:18,056 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,SelfDestructingSolverStorable1 [2022-03-20 15:16:18,057 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:18,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:18,057 INFO L85 PathProgramCache]: Analyzing trace with hash -153938307, now seen corresponding path program 1 times [2022-03-20 15:16:18,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:18,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2038323028] [2022-03-20 15:16:18,058 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:18,058 INFO L85 PathProgramCache]: Analyzing trace with hash -153938307, now seen corresponding path program 2 times [2022-03-20 15:16:18,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:18,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095981187] [2022-03-20 15:16:18,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:18,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:18,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:18,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757360267] [2022-03-20 15:16:18,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:18,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:18,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:18,069 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 15:16:18,070 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 15:16:18,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 15:16:18,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:18,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 15:16:18,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:18,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:16:18,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:18,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095981187] [2022-03-20 15:16:18,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:18,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757360267] [2022-03-20 15:16:18,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757360267] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:18,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:18,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:16:18,323 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:18,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2038323028] [2022-03-20 15:16:18,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2038323028] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:18,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:18,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:16:18,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556276534] [2022-03-20 15:16:18,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:18,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:16:18,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:18,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:16:18,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:16:18,324 INFO L87 Difference]: Start difference. First operand 34 states and 43 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 15:16:20,899 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:16:22,927 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 15:16:22,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:22,944 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-03-20 15:16:22,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:16:22,944 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-20 15:16:22,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:22,945 INFO L225 Difference]: With dead ends: 53 [2022-03-20 15:16:22,945 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 15:16:22,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 15:16:22,946 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:22,947 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 126 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-03-20 15:16:22,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 15:16:22,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-20 15:16:22,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 15:16:22,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2022-03-20 15:16:22,956 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2022-03-20 15:16:22,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:22,956 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2022-03-20 15:16:22,957 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 15:16:22,957 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2022-03-20 15:16:22,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 15:16:22,959 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:22,959 INFO L499 BasicCegarLoop]: trace histogram [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 15:16:22,984 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 15:16:23,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:23,176 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:23,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:23,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1676885497, now seen corresponding path program 1 times [2022-03-20 15:16:23,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:23,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1719917122] [2022-03-20 15:16:23,177 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:23,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1676885497, now seen corresponding path program 2 times [2022-03-20 15:16:23,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:23,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293968558] [2022-03-20 15:16:23,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:23,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:23,191 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:23,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485264443] [2022-03-20 15:16:23,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:23,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:23,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:23,193 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 15:16:23,194 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 15:16:23,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:16:23,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:23,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 15:16:23,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:23,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:23,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:23,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293968558] [2022-03-20 15:16:23,450 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:23,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485264443] [2022-03-20 15:16:23,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485264443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:23,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:23,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 15:16:23,451 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:23,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1719917122] [2022-03-20 15:16:23,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1719917122] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:23,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:23,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 15:16:23,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80662144] [2022-03-20 15:16:23,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:23,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 15:16:23,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:23,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 15:16:23,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:16:23,452 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 15:16:23,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:23,560 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-03-20 15:16:23,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 15:16:23,560 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-03-20 15:16:23,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:23,563 INFO L225 Difference]: With dead ends: 57 [2022-03-20 15:16:23,563 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 15:16:23,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-20 15:16:23,566 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 24 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:23,567 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 175 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:16:23,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 15:16:23,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2022-03-20 15:16:23,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 15:16:23,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-03-20 15:16:23,596 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 29 [2022-03-20 15:16:23,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:23,597 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-03-20 15:16:23,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 15:16:23,597 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-03-20 15:16:23,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 15:16:23,598 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:23,598 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:23,629 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 15:16:23,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:23,811 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:23,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:23,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1154059858, now seen corresponding path program 1 times [2022-03-20 15:16:23,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:23,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1890247630] [2022-03-20 15:16:23,812 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:23,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1154059858, now seen corresponding path program 2 times [2022-03-20 15:16:23,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:23,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476748688] [2022-03-20 15:16:23,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:23,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:23,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:23,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848087332] [2022-03-20 15:16:23,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:23,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:23,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:23,843 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 15:16:23,846 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 15:16:24,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:16:24,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:24,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 15:16:24,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:24,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:16:24,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:24,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476748688] [2022-03-20 15:16:24,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:24,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848087332] [2022-03-20 15:16:24,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848087332] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:24,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:24,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:16:24,109 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:24,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1890247630] [2022-03-20 15:16:24,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1890247630] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:24,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:24,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:16:24,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133541145] [2022-03-20 15:16:24,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:24,109 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:16:24,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:24,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:16:24,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:16:24,110 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 15:16:24,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:24,145 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2022-03-20 15:16:24,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:16:24,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2022-03-20 15:16:24,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:24,147 INFO L225 Difference]: With dead ends: 65 [2022-03-20 15:16:24,147 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 15:16:24,147 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:16:24,148 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:24,148 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 120 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:16:24,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 15:16:24,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-20 15:16:24,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 15:16:24,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-03-20 15:16:24,165 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 35 [2022-03-20 15:16:24,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:24,166 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-03-20 15:16:24,166 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 15:16:24,166 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-03-20 15:16:24,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 15:16:24,168 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:24,168 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:24,188 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 15:16:24,373 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:24,373 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:24,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:24,375 INFO L85 PathProgramCache]: Analyzing trace with hash -174895632, now seen corresponding path program 1 times [2022-03-20 15:16:24,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:24,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [922689134] [2022-03-20 15:16:24,376 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:24,377 INFO L85 PathProgramCache]: Analyzing trace with hash -174895632, now seen corresponding path program 2 times [2022-03-20 15:16:24,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:24,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419313439] [2022-03-20 15:16:24,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:24,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:24,387 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:24,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245282719] [2022-03-20 15:16:24,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:24,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:24,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:24,388 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 15:16:24,390 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 15:16:24,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:16:24,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:24,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 15:16:24,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:24,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 15:16:24,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:24,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419313439] [2022-03-20 15:16:24,612 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:24,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245282719] [2022-03-20 15:16:24,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245282719] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 15:16:24,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:16:24,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-03-20 15:16:24,613 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:24,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [922689134] [2022-03-20 15:16:24,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [922689134] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:24,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:24,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:16:24,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825024448] [2022-03-20 15:16:24,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:24,614 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 15:16:24,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:24,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 15:16:24,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:16:24,615 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 15:16:24,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:24,663 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-03-20 15:16:24,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 15:16:24,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-03-20 15:16:24,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:24,676 INFO L225 Difference]: With dead ends: 74 [2022-03-20 15:16:24,676 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 15:16:24,677 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:16:24,677 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 22 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:24,678 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 125 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:16:24,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 15:16:24,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-03-20 15:16:24,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 15:16:24,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-03-20 15:16:24,717 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 41 [2022-03-20 15:16:24,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:24,718 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-03-20 15:16:24,718 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 15:16:24,718 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-03-20 15:16:24,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 15:16:24,720 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:24,720 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:24,773 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 15:16:24,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:24,956 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:24,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:24,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1292932747, now seen corresponding path program 1 times [2022-03-20 15:16:24,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:24,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [417650929] [2022-03-20 15:16:24,957 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:24,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1292932747, now seen corresponding path program 2 times [2022-03-20 15:16:24,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:24,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868999806] [2022-03-20 15:16:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:24,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:24,963 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:24,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633407274] [2022-03-20 15:16:24,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:24,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:24,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:24,967 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 15:16:24,977 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 15:16:25,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:16:25,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:25,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 15:16:25,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:25,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:25,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 15:16:25,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:25,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868999806] [2022-03-20 15:16:25,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:25,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633407274] [2022-03-20 15:16:25,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633407274] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:25,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:25,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 15:16:25,194 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:25,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [417650929] [2022-03-20 15:16:25,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [417650929] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:25,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:25,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:16:25,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27586149] [2022-03-20 15:16:25,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:25,194 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 15:16:25,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:25,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 15:16:25,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:16:25,195 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 15:16:25,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:25,232 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-03-20 15:16:25,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 15:16:25,232 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 43 [2022-03-20 15:16:25,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:25,233 INFO L225 Difference]: With dead ends: 75 [2022-03-20 15:16:25,233 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 15:16:25,233 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-03-20 15:16:25,234 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:25,234 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 125 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:16:25,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 15:16:25,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-20 15:16:25,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 15:16:25,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-03-20 15:16:25,254 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 43 [2022-03-20 15:16:25,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:25,255 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-03-20 15:16:25,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 15:16:25,255 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-03-20 15:16:25,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 15:16:25,256 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:25,256 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:25,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:25,473 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:25,474 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:25,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:25,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1407897436, now seen corresponding path program 1 times [2022-03-20 15:16:25,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:25,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [830399221] [2022-03-20 15:16:25,475 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:25,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1407897436, now seen corresponding path program 2 times [2022-03-20 15:16:25,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:25,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117750186] [2022-03-20 15:16:25,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:25,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:25,487 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:25,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101337745] [2022-03-20 15:16:25,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:25,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:25,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:25,503 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 15:16:25,531 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 15:16:25,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:16:25,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:25,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 15:16:25,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 15:16:25,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:16:25,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:25,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117750186] [2022-03-20 15:16:25,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:25,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101337745] [2022-03-20 15:16:25,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101337745] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:25,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:25,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 15:16:25,652 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:25,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [830399221] [2022-03-20 15:16:25,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [830399221] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:25,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:25,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 15:16:25,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540586184] [2022-03-20 15:16:25,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:25,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 15:16:25,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:25,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 15:16:25,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-20 15:16:25,653 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 15:16:25,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:25,680 INFO L93 Difference]: Finished difference Result 101 states and 131 transitions. [2022-03-20 15:16:25,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 15:16:25,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-03-20 15:16:25,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:25,681 INFO L225 Difference]: With dead ends: 101 [2022-03-20 15:16:25,682 INFO L226 Difference]: Without dead ends: 80 [2022-03-20 15:16:25,682 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-20 15:16:25,682 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 19 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:25,682 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 107 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:16:25,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-20 15:16:25,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2022-03-20 15:16:25,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 14 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 15:16:25,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2022-03-20 15:16:25,693 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 47 [2022-03-20 15:16:25,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:25,694 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2022-03-20 15:16:25,694 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 15:16:25,694 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2022-03-20 15:16:25,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 15:16:25,694 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:25,694 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:25,711 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 15:16:25,907 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,SelfDestructingSolverStorable7 [2022-03-20 15:16:25,908 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:25,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1915058849, now seen corresponding path program 1 times [2022-03-20 15:16:25,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:25,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1481843733] [2022-03-20 15:16:25,908 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:25,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1915058849, now seen corresponding path program 2 times [2022-03-20 15:16:25,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:25,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528208191] [2022-03-20 15:16:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:25,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:25,915 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:25,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328201392] [2022-03-20 15:16:25,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:25,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:25,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:25,916 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 15:16:25,944 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 15:16:25,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:16:25,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:25,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 15:16:25,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:26,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:26,184 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 15:16:26,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:26,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528208191] [2022-03-20 15:16:26,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:26,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328201392] [2022-03-20 15:16:26,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328201392] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:26,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:26,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 15:16:26,184 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:26,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1481843733] [2022-03-20 15:16:26,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1481843733] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:26,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:26,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 15:16:26,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4025901] [2022-03-20 15:16:26,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:26,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 15:16:26,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:26,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 15:16:26,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-20 15:16:26,186 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 15:16:26,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:26,232 INFO L93 Difference]: Finished difference Result 118 states and 153 transitions. [2022-03-20 15:16:26,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 15:16:26,232 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 49 [2022-03-20 15:16:26,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:26,233 INFO L225 Difference]: With dead ends: 118 [2022-03-20 15:16:26,233 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 15:16:26,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-03-20 15:16:26,234 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 22 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:26,234 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 134 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:16:26,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 15:16:26,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-03-20 15:16:26,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 states have internal predecessors, (69), 16 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 15:16:26,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2022-03-20 15:16:26,247 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 49 [2022-03-20 15:16:26,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:26,247 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2022-03-20 15:16:26,248 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 15:16:26,248 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2022-03-20 15:16:26,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 15:16:26,248 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:26,248 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:26,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:26,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:26,463 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:26,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:26,464 INFO L85 PathProgramCache]: Analyzing trace with hash -60460648, now seen corresponding path program 3 times [2022-03-20 15:16:26,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:26,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [42208169] [2022-03-20 15:16:26,464 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:26,464 INFO L85 PathProgramCache]: Analyzing trace with hash -60460648, now seen corresponding path program 4 times [2022-03-20 15:16:26,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:26,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158737863] [2022-03-20 15:16:26,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:26,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:26,470 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:26,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337813570] [2022-03-20 15:16:26,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:16:26,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:26,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:26,472 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:26,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 15:16:26,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:16:26,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:26,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 15:16:26,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:26,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 15:16:26,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:26,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158737863] [2022-03-20 15:16:26,762 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:26,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337813570] [2022-03-20 15:16:26,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337813570] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:26,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:26,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 15:16:26,762 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:26,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [42208169] [2022-03-20 15:16:26,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [42208169] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:26,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:26,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 15:16:26,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135069479] [2022-03-20 15:16:26,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:26,763 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 15:16:26,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:26,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 15:16:26,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-20 15:16:26,763 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 15:16:26,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:26,814 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2022-03-20 15:16:26,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 15:16:26,814 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2022-03-20 15:16:26,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:26,815 INFO L225 Difference]: With dead ends: 119 [2022-03-20 15:16:26,815 INFO L226 Difference]: Without dead ends: 82 [2022-03-20 15:16:26,815 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:16:26,816 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 23 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:26,816 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 121 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:16:26,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-20 15:16:26,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-03-20 15:16:26,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 states have internal predecessors, (71), 16 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 15:16:26,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-03-20 15:16:26,826 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 51 [2022-03-20 15:16:26,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:26,826 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-03-20 15:16:26,826 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 15:16:26,826 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-03-20 15:16:26,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 15:16:26,827 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:26,827 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:26,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:27,044 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 15:16:27,044 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:27,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:27,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1067781299, now seen corresponding path program 1 times [2022-03-20 15:16:27,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:27,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [933810409] [2022-03-20 15:16:27,045 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:27,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1067781299, now seen corresponding path program 2 times [2022-03-20 15:16:27,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:27,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468864885] [2022-03-20 15:16:27,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:27,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:27,051 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:27,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215376313] [2022-03-20 15:16:27,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:27,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:27,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:27,052 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:27,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 15:16:27,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:16:27,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:27,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 15:16:27,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:27,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 15:16:27,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:27,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468864885] [2022-03-20 15:16:27,357 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:27,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215376313] [2022-03-20 15:16:27,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215376313] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:27,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:27,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 15:16:27,357 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:27,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [933810409] [2022-03-20 15:16:27,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [933810409] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:27,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:27,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 15:16:27,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271336440] [2022-03-20 15:16:27,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:27,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 15:16:27,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:27,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 15:16:27,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:16:27,359 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 15:16:27,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:27,426 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2022-03-20 15:16:27,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 15:16:27,426 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 55 [2022-03-20 15:16:27,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:27,428 INFO L225 Difference]: With dead ends: 99 [2022-03-20 15:16:27,428 INFO L226 Difference]: Without dead ends: 94 [2022-03-20 15:16:27,428 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-03-20 15:16:27,429 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 33 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:27,429 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 162 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:16:27,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-20 15:16:27,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2022-03-20 15:16:27,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 65 states have (on average 1.2) internal successors, (78), 66 states have internal predecessors, (78), 18 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 15:16:27,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2022-03-20 15:16:27,443 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 55 [2022-03-20 15:16:27,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:27,443 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2022-03-20 15:16:27,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 15:16:27,444 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2022-03-20 15:16:27,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 15:16:27,444 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:27,444 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:27,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:27,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 15:16:27,667 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:27,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:27,668 INFO L85 PathProgramCache]: Analyzing trace with hash -2095290798, now seen corresponding path program 3 times [2022-03-20 15:16:27,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:27,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2073535812] [2022-03-20 15:16:27,669 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:27,669 INFO L85 PathProgramCache]: Analyzing trace with hash -2095290798, now seen corresponding path program 4 times [2022-03-20 15:16:27,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:27,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6860707] [2022-03-20 15:16:27,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:27,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:27,675 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:27,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040163784] [2022-03-20 15:16:27,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:16:27,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:27,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:27,691 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:27,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 15:16:27,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:16:27,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:27,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 15:16:27,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:27,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:27,971 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 15:16:27,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:27,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6860707] [2022-03-20 15:16:27,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:27,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040163784] [2022-03-20 15:16:27,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040163784] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:27,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:27,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 15:16:27,972 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:27,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2073535812] [2022-03-20 15:16:27,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2073535812] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:27,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:27,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 15:16:27,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370268162] [2022-03-20 15:16:27,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:27,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 15:16:27,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:27,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 15:16:27,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:16:27,974 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 15:16:28,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:28,041 INFO L93 Difference]: Finished difference Result 132 states and 170 transitions. [2022-03-20 15:16:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 15:16:28,041 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 57 [2022-03-20 15:16:28,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:28,042 INFO L225 Difference]: With dead ends: 132 [2022-03-20 15:16:28,042 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 15:16:28,042 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-20 15:16:28,043 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 31 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:28,043 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 146 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:16:28,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 15:16:28,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-03-20 15:16:28,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 68 states have internal predecessors, (82), 18 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 15:16:28,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2022-03-20 15:16:28,055 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 57 [2022-03-20 15:16:28,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:28,055 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2022-03-20 15:16:28,055 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 15:16:28,055 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2022-03-20 15:16:28,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 15:16:28,056 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:28,056 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:28,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:28,269 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 15:16:28,269 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:28,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:28,270 INFO L85 PathProgramCache]: Analyzing trace with hash -659642693, now seen corresponding path program 5 times [2022-03-20 15:16:28,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:28,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1163132270] [2022-03-20 15:16:28,270 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:28,270 INFO L85 PathProgramCache]: Analyzing trace with hash -659642693, now seen corresponding path program 6 times [2022-03-20 15:16:28,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:28,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660086363] [2022-03-20 15:16:28,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:28,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:28,277 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:28,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [275952977] [2022-03-20 15:16:28,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:16:28,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:28,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:28,295 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:28,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 15:16:28,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 15:16:28,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:28,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 15:16:28,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:28,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 15:16:28,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:28,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660086363] [2022-03-20 15:16:28,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:28,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275952977] [2022-03-20 15:16:28,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275952977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:28,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:28,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 15:16:28,651 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:28,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1163132270] [2022-03-20 15:16:28,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1163132270] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:28,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:28,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 15:16:28,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308668631] [2022-03-20 15:16:28,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:28,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 15:16:28,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:28,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 15:16:28,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:16:28,652 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 15:16:28,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:28,743 INFO L93 Difference]: Finished difference Result 133 states and 171 transitions. [2022-03-20 15:16:28,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 15:16:28,744 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2022-03-20 15:16:28,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:28,745 INFO L225 Difference]: With dead ends: 133 [2022-03-20 15:16:28,745 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 15:16:28,745 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2022-03-20 15:16:28,745 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 41 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:28,746 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 138 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:28,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 15:16:28,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-03-20 15:16:28,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 70 states have (on average 1.2) internal successors, (84), 70 states have internal predecessors, (84), 18 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 15:16:28,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2022-03-20 15:16:28,760 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 59 [2022-03-20 15:16:28,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:28,760 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2022-03-20 15:16:28,760 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 15:16:28,760 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2022-03-20 15:16:28,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 15:16:28,761 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:28,761 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:28,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:28,965 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 15:16:28,966 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:28,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:28,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1402694082, now seen corresponding path program 3 times [2022-03-20 15:16:28,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:28,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [420826419] [2022-03-20 15:16:28,967 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:28,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1402694082, now seen corresponding path program 4 times [2022-03-20 15:16:28,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:28,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494686640] [2022-03-20 15:16:28,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:28,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:28,973 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:28,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570873389] [2022-03-20 15:16:28,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:16:28,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:28,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:28,975 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:28,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 15:16:29,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:16:29,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:29,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 15:16:29,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:29,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-20 15:16:29,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:29,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494686640] [2022-03-20 15:16:29,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:29,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570873389] [2022-03-20 15:16:29,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570873389] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:29,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:29,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-20 15:16:29,309 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:29,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [420826419] [2022-03-20 15:16:29,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [420826419] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:29,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:29,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 15:16:29,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329512358] [2022-03-20 15:16:29,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:29,309 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 15:16:29,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:29,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 15:16:29,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-20 15:16:29,310 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 15:16:29,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:29,385 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2022-03-20 15:16:29,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 15:16:29,386 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 63 [2022-03-20 15:16:29,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:29,386 INFO L225 Difference]: With dead ends: 116 [2022-03-20 15:16:29,386 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 15:16:29,387 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-03-20 15:16:29,387 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 34 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:29,387 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 184 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:29,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 15:16:29,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2022-03-20 15:16:29,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 78 states have internal predecessors, (91), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 15:16:29,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 131 transitions. [2022-03-20 15:16:29,398 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 131 transitions. Word has length 63 [2022-03-20 15:16:29,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:29,398 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 131 transitions. [2022-03-20 15:16:29,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 15:16:29,398 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 131 transitions. [2022-03-20 15:16:29,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 15:16:29,399 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:29,399 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:29,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:29,616 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:29,616 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:29,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:29,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1823928061, now seen corresponding path program 5 times [2022-03-20 15:16:29,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:29,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1173589328] [2022-03-20 15:16:29,617 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:29,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1823928061, now seen corresponding path program 6 times [2022-03-20 15:16:29,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:29,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136640583] [2022-03-20 15:16:29,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:29,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:29,622 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:29,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703793833] [2022-03-20 15:16:29,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:16:29,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:29,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:29,623 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:29,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 15:16:29,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-20 15:16:29,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:29,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 15:16:29,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:29,790 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 58 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:29,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-20 15:16:29,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:29,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136640583] [2022-03-20 15:16:29,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:29,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703793833] [2022-03-20 15:16:29,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703793833] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:29,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:29,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-20 15:16:29,926 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:29,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1173589328] [2022-03-20 15:16:29,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1173589328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:29,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:29,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 15:16:29,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349721909] [2022-03-20 15:16:29,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:29,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 15:16:29,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:29,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 15:16:29,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-20 15:16:29,927 INFO L87 Difference]: Start difference. First operand 106 states and 131 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 15:16:30,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:30,008 INFO L93 Difference]: Finished difference Result 149 states and 191 transitions. [2022-03-20 15:16:30,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 15:16:30,009 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 65 [2022-03-20 15:16:30,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:30,010 INFO L225 Difference]: With dead ends: 149 [2022-03-20 15:16:30,010 INFO L226 Difference]: Without dead ends: 112 [2022-03-20 15:16:30,010 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-03-20 15:16:30,011 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 47 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:30,011 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 173 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:30,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-20 15:16:30,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-03-20 15:16:30,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 80 states have internal predecessors, (95), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 15:16:30,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2022-03-20 15:16:30,041 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 65 [2022-03-20 15:16:30,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:30,042 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2022-03-20 15:16:30,042 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 15:16:30,042 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2022-03-20 15:16:30,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 15:16:30,042 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:30,042 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:30,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:30,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 15:16:30,259 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:30,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:30,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1211810838, now seen corresponding path program 1 times [2022-03-20 15:16:30,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:30,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [171798869] [2022-03-20 15:16:30,260 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:30,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1211810838, now seen corresponding path program 2 times [2022-03-20 15:16:30,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:30,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190383530] [2022-03-20 15:16:30,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:30,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:30,265 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:30,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780007083] [2022-03-20 15:16:30,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:30,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:30,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:30,279 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:30,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 15:16:30,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:16:30,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:30,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 15:16:30,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:30,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:30,580 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-20 15:16:30,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:30,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190383530] [2022-03-20 15:16:30,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:30,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780007083] [2022-03-20 15:16:30,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780007083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:30,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:30,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-20 15:16:30,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:30,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [171798869] [2022-03-20 15:16:30,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [171798869] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:30,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:30,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 15:16:30,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492463395] [2022-03-20 15:16:30,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:30,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 15:16:30,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:30,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 15:16:30,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-20 15:16:30,582 INFO L87 Difference]: Start difference. First operand 109 states and 135 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 15:16:30,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:30,666 INFO L93 Difference]: Finished difference Result 151 states and 194 transitions. [2022-03-20 15:16:30,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 15:16:30,667 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 67 [2022-03-20 15:16:30,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:30,667 INFO L225 Difference]: With dead ends: 151 [2022-03-20 15:16:30,667 INFO L226 Difference]: Without dead ends: 114 [2022-03-20 15:16:30,668 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=228, Unknown=0, NotChecked=0, Total=380 [2022-03-20 15:16:30,668 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 47 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:30,668 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 160 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:30,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-20 15:16:30,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-03-20 15:16:30,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 15:16:30,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 140 transitions. [2022-03-20 15:16:30,682 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 140 transitions. Word has length 67 [2022-03-20 15:16:30,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:30,682 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 140 transitions. [2022-03-20 15:16:30,682 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 15:16:30,682 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 140 transitions. [2022-03-20 15:16:30,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 15:16:30,683 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:30,683 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:30,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:30,906 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 15:16:30,906 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:30,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:30,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1645787183, now seen corresponding path program 5 times [2022-03-20 15:16:30,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:30,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2010870169] [2022-03-20 15:16:30,907 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:30,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1645787183, now seen corresponding path program 6 times [2022-03-20 15:16:30,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:30,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446353835] [2022-03-20 15:16:30,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:30,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:30,912 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:30,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227324108] [2022-03-20 15:16:30,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:16:30,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:30,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:30,918 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:30,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 15:16:30,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 15:16:30,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:30,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 15:16:30,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:31,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 15:16:31,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:31,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446353835] [2022-03-20 15:16:31,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:31,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227324108] [2022-03-20 15:16:31,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227324108] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:31,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:31,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 15:16:31,266 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:31,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2010870169] [2022-03-20 15:16:31,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2010870169] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:31,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:31,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 15:16:31,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127114373] [2022-03-20 15:16:31,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:31,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 15:16:31,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:31,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 15:16:31,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 15:16:31,267 INFO L87 Difference]: Start difference. First operand 114 states and 140 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 15:16:31,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:31,375 INFO L93 Difference]: Finished difference Result 137 states and 169 transitions. [2022-03-20 15:16:31,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 15:16:31,376 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 71 [2022-03-20 15:16:31,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:31,376 INFO L225 Difference]: With dead ends: 137 [2022-03-20 15:16:31,376 INFO L226 Difference]: Without dead ends: 132 [2022-03-20 15:16:31,377 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=250, Unknown=0, NotChecked=0, Total=420 [2022-03-20 15:16:31,377 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 63 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:31,377 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 192 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:31,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-20 15:16:31,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2022-03-20 15:16:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 93 states have internal predecessors, (107), 25 states have call successors, (25), 11 states have call predecessors, (25), 9 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 15:16:31,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 155 transitions. [2022-03-20 15:16:31,391 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 155 transitions. Word has length 71 [2022-03-20 15:16:31,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:31,391 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 155 transitions. [2022-03-20 15:16:31,391 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 15:16:31,391 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 155 transitions. [2022-03-20 15:16:31,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 15:16:31,392 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:31,392 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:31,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:31,608 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 15:16:31,609 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:31,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:31,609 INFO L85 PathProgramCache]: Analyzing trace with hash -15963768, now seen corresponding path program 1 times [2022-03-20 15:16:31,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:31,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [228697747] [2022-03-20 15:16:31,610 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:31,610 INFO L85 PathProgramCache]: Analyzing trace with hash -15963768, now seen corresponding path program 2 times [2022-03-20 15:16:31,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:31,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206134742] [2022-03-20 15:16:31,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:31,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:31,614 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:31,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711407991] [2022-03-20 15:16:31,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:31,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:31,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:31,621 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:31,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 15:16:31,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:16:31,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:31,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 15:16:31,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-03-20 15:16:31,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:16:31,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:31,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206134742] [2022-03-20 15:16:31,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:31,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711407991] [2022-03-20 15:16:31,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711407991] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:31,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:31,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 15:16:31,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:31,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [228697747] [2022-03-20 15:16:31,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [228697747] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:31,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:31,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 15:16:31,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832858045] [2022-03-20 15:16:31,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:31,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 15:16:31,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:31,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 15:16:31,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-20 15:16:31,791 INFO L87 Difference]: Start difference. First operand 125 states and 155 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 15:16:31,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:31,854 INFO L93 Difference]: Finished difference Result 180 states and 235 transitions. [2022-03-20 15:16:31,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 15:16:31,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 73 [2022-03-20 15:16:31,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:31,856 INFO L225 Difference]: With dead ends: 180 [2022-03-20 15:16:31,856 INFO L226 Difference]: Without dead ends: 143 [2022-03-20 15:16:31,856 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-20 15:16:31,857 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 12 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:31,857 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 138 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:16:31,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-20 15:16:31,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2022-03-20 15:16:31,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 99 states have (on average 1.202020202020202) internal successors, (119), 102 states have internal predecessors, (119), 28 states have call successors, (28), 11 states have call predecessors, (28), 9 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 15:16:31,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2022-03-20 15:16:31,876 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 73 [2022-03-20 15:16:31,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:31,876 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2022-03-20 15:16:31,876 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 15:16:31,877 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2022-03-20 15:16:31,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 15:16:31,878 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:31,878 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:31,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:32,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 15:16:32,095 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:32,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:32,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1401128268, now seen corresponding path program 7 times [2022-03-20 15:16:32,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:32,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [530453595] [2022-03-20 15:16:32,096 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:32,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1401128268, now seen corresponding path program 8 times [2022-03-20 15:16:32,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:32,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498505710] [2022-03-20 15:16:32,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:32,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:32,106 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:32,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303702593] [2022-03-20 15:16:32,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:32,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:32,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:32,109 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:32,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 15:16:32,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:16:32,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:32,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 15:16:32,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:32,280 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 14 proven. 92 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:32,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 15:16:32,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:32,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498505710] [2022-03-20 15:16:32,465 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:32,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303702593] [2022-03-20 15:16:32,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303702593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:32,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:32,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 15:16:32,465 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:32,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [530453595] [2022-03-20 15:16:32,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [530453595] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:32,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:32,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 15:16:32,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056741163] [2022-03-20 15:16:32,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:32,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 15:16:32,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:32,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 15:16:32,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 15:16:32,466 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 15:16:32,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:32,584 INFO L93 Difference]: Finished difference Result 193 states and 252 transitions. [2022-03-20 15:16:32,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 15:16:32,585 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 73 [2022-03-20 15:16:32,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:32,586 INFO L225 Difference]: With dead ends: 193 [2022-03-20 15:16:32,586 INFO L226 Difference]: Without dead ends: 144 [2022-03-20 15:16:32,586 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=277, Unknown=0, NotChecked=0, Total=462 [2022-03-20 15:16:32,586 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 57 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:32,587 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 193 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:32,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-20 15:16:32,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2022-03-20 15:16:32,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 102 states have (on average 1.2058823529411764) internal successors, (123), 104 states have internal predecessors, (123), 28 states have call successors, (28), 11 states have call predecessors, (28), 9 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 15:16:32,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 177 transitions. [2022-03-20 15:16:32,602 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 177 transitions. Word has length 73 [2022-03-20 15:16:32,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:32,602 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 177 transitions. [2022-03-20 15:16:32,602 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 15:16:32,602 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 177 transitions. [2022-03-20 15:16:32,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 15:16:32,603 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:32,603 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:32,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-20 15:16:32,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:32,820 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:32,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:32,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1116733197, now seen corresponding path program 1 times [2022-03-20 15:16:32,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:32,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1505469620] [2022-03-20 15:16:32,820 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:32,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1116733197, now seen corresponding path program 2 times [2022-03-20 15:16:32,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:32,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245891987] [2022-03-20 15:16:32,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:32,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:32,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:32,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807241015] [2022-03-20 15:16:32,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:32,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:32,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:32,831 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:32,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 15:16:32,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:16:32,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:32,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 15:16:32,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 76 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:33,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 15:16:33,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:33,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245891987] [2022-03-20 15:16:33,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:33,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807241015] [2022-03-20 15:16:33,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807241015] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:33,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:33,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 15:16:33,158 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:33,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1505469620] [2022-03-20 15:16:33,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1505469620] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:33,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:33,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 15:16:33,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161937544] [2022-03-20 15:16:33,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:33,158 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 15:16:33,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:33,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 15:16:33,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 15:16:33,159 INFO L87 Difference]: Start difference. First operand 140 states and 177 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 15:16:33,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:33,287 INFO L93 Difference]: Finished difference Result 195 states and 255 transitions. [2022-03-20 15:16:33,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 15:16:33,287 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 75 [2022-03-20 15:16:33,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:33,288 INFO L225 Difference]: With dead ends: 195 [2022-03-20 15:16:33,288 INFO L226 Difference]: Without dead ends: 146 [2022-03-20 15:16:33,289 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=205, Invalid=301, Unknown=0, NotChecked=0, Total=506 [2022-03-20 15:16:33,289 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 66 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:33,289 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 176 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:33,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-20 15:16:33,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-03-20 15:16:33,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 108 states have (on average 1.1944444444444444) internal successors, (129), 108 states have internal predecessors, (129), 28 states have call successors, (28), 11 states have call predecessors, (28), 9 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 15:16:33,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 183 transitions. [2022-03-20 15:16:33,304 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 183 transitions. Word has length 75 [2022-03-20 15:16:33,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:33,304 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 183 transitions. [2022-03-20 15:16:33,304 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 15:16:33,304 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 183 transitions. [2022-03-20 15:16:33,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 15:16:33,305 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:33,305 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 5, 5, 5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:33,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:33,521 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:33,521 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:33,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:33,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1970775776, now seen corresponding path program 7 times [2022-03-20 15:16:33,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:33,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [707124312] [2022-03-20 15:16:33,522 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:33,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1970775776, now seen corresponding path program 8 times [2022-03-20 15:16:33,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:33,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071288635] [2022-03-20 15:16:33,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:33,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:33,526 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:33,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1848424836] [2022-03-20 15:16:33,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:33,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:33,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:33,528 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:33,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 15:16:33,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:16:33,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:33,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 15:16:33,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 14 proven. 126 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:33,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 15:16:33,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:33,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071288635] [2022-03-20 15:16:33,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:33,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848424836] [2022-03-20 15:16:33,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848424836] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:33,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:33,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-20 15:16:33,828 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:33,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [707124312] [2022-03-20 15:16:33,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [707124312] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:33,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:33,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 15:16:33,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589282206] [2022-03-20 15:16:33,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:33,828 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 15:16:33,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:33,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 15:16:33,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-20 15:16:33,829 INFO L87 Difference]: Start difference. First operand 146 states and 183 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 15:16:33,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:33,931 INFO L93 Difference]: Finished difference Result 168 states and 210 transitions. [2022-03-20 15:16:33,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 15:16:33,931 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 79 [2022-03-20 15:16:33,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:33,932 INFO L225 Difference]: With dead ends: 168 [2022-03-20 15:16:33,932 INFO L226 Difference]: Without dead ends: 163 [2022-03-20 15:16:33,932 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=225, Invalid=327, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:16:33,933 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 68 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:33,933 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 233 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:33,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-20 15:16:33,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2022-03-20 15:16:33,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 114 states have (on average 1.1929824561403508) internal successors, (136), 117 states have internal predecessors, (136), 32 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-20 15:16:33,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 198 transitions. [2022-03-20 15:16:33,950 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 198 transitions. Word has length 79 [2022-03-20 15:16:33,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:33,951 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 198 transitions. [2022-03-20 15:16:33,951 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 15:16:33,951 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 198 transitions. [2022-03-20 15:16:33,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 15:16:33,955 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:33,955 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:33,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:34,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:34,171 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:34,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:34,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1693648491, now seen corresponding path program 1 times [2022-03-20 15:16:34,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:34,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [913768438] [2022-03-20 15:16:34,172 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:34,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1693648491, now seen corresponding path program 2 times [2022-03-20 15:16:34,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:34,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989726455] [2022-03-20 15:16:34,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:34,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:34,177 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:34,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608970805] [2022-03-20 15:16:34,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:34,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:34,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:34,180 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:34,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 15:16:34,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:16:34,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:34,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 15:16:34,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:34,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 15:16:34,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:34,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989726455] [2022-03-20 15:16:34,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:34,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608970805] [2022-03-20 15:16:34,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608970805] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:34,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:34,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-20 15:16:34,567 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:34,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [913768438] [2022-03-20 15:16:34,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [913768438] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:34,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:34,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 15:16:34,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900474170] [2022-03-20 15:16:34,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:34,567 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 15:16:34,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:34,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 15:16:34,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-20 15:16:34,568 INFO L87 Difference]: Start difference. First operand 157 states and 198 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 15:16:34,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:34,739 INFO L93 Difference]: Finished difference Result 213 states and 277 transitions. [2022-03-20 15:16:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 15:16:34,741 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 81 [2022-03-20 15:16:34,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:34,742 INFO L225 Difference]: With dead ends: 213 [2022-03-20 15:16:34,742 INFO L226 Difference]: Without dead ends: 164 [2022-03-20 15:16:34,742 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=243, Invalid=357, Unknown=0, NotChecked=0, Total=600 [2022-03-20 15:16:34,743 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 100 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:34,743 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 185 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:34,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-20 15:16:34,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2022-03-20 15:16:34,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 117 states have (on average 1.1965811965811965) internal successors, (140), 119 states have internal predecessors, (140), 32 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-20 15:16:34,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2022-03-20 15:16:34,760 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 81 [2022-03-20 15:16:34,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:34,760 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2022-03-20 15:16:34,760 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 15:16:34,760 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2022-03-20 15:16:34,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 15:16:34,761 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:34,761 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:34,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:34,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:34,975 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:34,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:34,976 INFO L85 PathProgramCache]: Analyzing trace with hash -918360272, now seen corresponding path program 3 times [2022-03-20 15:16:34,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:34,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1565271184] [2022-03-20 15:16:34,976 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:34,976 INFO L85 PathProgramCache]: Analyzing trace with hash -918360272, now seen corresponding path program 4 times [2022-03-20 15:16:34,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:34,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174766070] [2022-03-20 15:16:34,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:34,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:34,981 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:34,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768617858] [2022-03-20 15:16:34,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:16:34,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:34,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:34,990 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:34,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 15:16:35,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:16:35,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:35,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 15:16:35,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 22 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:35,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 15:16:35,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:35,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174766070] [2022-03-20 15:16:35,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:35,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768617858] [2022-03-20 15:16:35,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768617858] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:35,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:35,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-20 15:16:35,458 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:35,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1565271184] [2022-03-20 15:16:35,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1565271184] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:35,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:35,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 15:16:35,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099802892] [2022-03-20 15:16:35,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:35,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 15:16:35,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:35,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 15:16:35,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-20 15:16:35,459 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 15:16:35,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:35,605 INFO L93 Difference]: Finished difference Result 215 states and 280 transitions. [2022-03-20 15:16:35,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 15:16:35,605 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 83 [2022-03-20 15:16:35,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:35,606 INFO L225 Difference]: With dead ends: 215 [2022-03-20 15:16:35,606 INFO L226 Difference]: Without dead ends: 166 [2022-03-20 15:16:35,607 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=266, Invalid=384, Unknown=0, NotChecked=0, Total=650 [2022-03-20 15:16:35,607 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 87 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:35,607 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 209 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:35,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-03-20 15:16:35,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-03-20 15:16:35,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 123 states have internal predecessors, (146), 32 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-20 15:16:35,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 208 transitions. [2022-03-20 15:16:35,636 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 208 transitions. Word has length 83 [2022-03-20 15:16:35,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:35,639 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 208 transitions. [2022-03-20 15:16:35,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 15:16:35,639 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 208 transitions. [2022-03-20 15:16:35,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 15:16:35,640 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:35,640 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:35,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:35,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:35,856 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:35,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:35,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1698627479, now seen corresponding path program 1 times [2022-03-20 15:16:35,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:35,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2036114524] [2022-03-20 15:16:35,856 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:35,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1698627479, now seen corresponding path program 2 times [2022-03-20 15:16:35,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:35,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350704196] [2022-03-20 15:16:35,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:35,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:35,863 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:35,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328209151] [2022-03-20 15:16:35,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:35,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:35,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:35,865 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:35,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 15:16:35,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:16:35,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:35,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 15:16:35,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 16 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:36,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 15:16:36,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:36,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350704196] [2022-03-20 15:16:36,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:36,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328209151] [2022-03-20 15:16:36,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328209151] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:36,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:36,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-20 15:16:36,244 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:36,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2036114524] [2022-03-20 15:16:36,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2036114524] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:36,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:36,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 15:16:36,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20714355] [2022-03-20 15:16:36,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:36,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 15:16:36,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:36,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 15:16:36,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-20 15:16:36,245 INFO L87 Difference]: Start difference. First operand 166 states and 208 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 15:16:36,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:36,438 INFO L93 Difference]: Finished difference Result 188 states and 235 transitions. [2022-03-20 15:16:36,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 15:16:36,438 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 87 [2022-03-20 15:16:36,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:36,439 INFO L225 Difference]: With dead ends: 188 [2022-03-20 15:16:36,439 INFO L226 Difference]: Without dead ends: 183 [2022-03-20 15:16:36,440 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=288, Invalid=414, Unknown=0, NotChecked=0, Total=702 [2022-03-20 15:16:36,440 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 118 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:36,440 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 214 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:36,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-20 15:16:36,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 177. [2022-03-20 15:16:36,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 129 states have (on average 1.186046511627907) internal successors, (153), 132 states have internal predecessors, (153), 36 states have call successors, (36), 13 states have call predecessors, (36), 11 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 15:16:36,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 223 transitions. [2022-03-20 15:16:36,459 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 223 transitions. Word has length 87 [2022-03-20 15:16:36,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:36,459 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 223 transitions. [2022-03-20 15:16:36,459 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 15:16:36,459 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 223 transitions. [2022-03-20 15:16:36,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 15:16:36,460 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:36,460 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:36,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:36,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:36,675 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:36,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:36,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2133755932, now seen corresponding path program 3 times [2022-03-20 15:16:36,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:36,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2111972045] [2022-03-20 15:16:36,676 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:36,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2133755932, now seen corresponding path program 4 times [2022-03-20 15:16:36,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:36,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8813069] [2022-03-20 15:16:36,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:36,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:36,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:36,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223191619] [2022-03-20 15:16:36,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:16:36,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:36,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:36,687 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:36,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 15:16:36,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:16:36,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:36,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 15:16:36,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-20 15:16:36,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-20 15:16:36,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:36,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8813069] [2022-03-20 15:16:36,893 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:36,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223191619] [2022-03-20 15:16:36,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223191619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:36,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:36,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-03-20 15:16:36,893 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:36,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2111972045] [2022-03-20 15:16:36,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2111972045] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:36,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:36,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 15:16:36,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782066351] [2022-03-20 15:16:36,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:36,893 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 15:16:36,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:36,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 15:16:36,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 15:16:36,894 INFO L87 Difference]: Start difference. First operand 177 states and 223 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 15:16:36,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:36,956 INFO L93 Difference]: Finished difference Result 407 states and 543 transitions. [2022-03-20 15:16:36,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:16:36,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 89 [2022-03-20 15:16:36,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:36,957 INFO L225 Difference]: With dead ends: 407 [2022-03-20 15:16:36,957 INFO L226 Difference]: Without dead ends: 301 [2022-03-20 15:16:36,958 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:16:36,958 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 13 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:36,958 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 167 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:16:36,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-03-20 15:16:37,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 296. [2022-03-20 15:16:37,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 219 states have (on average 1.2191780821917808) internal successors, (267), 225 states have internal predecessors, (267), 65 states have call successors, (65), 13 states have call predecessors, (65), 11 states have return successors, (63), 57 states have call predecessors, (63), 63 states have call successors, (63) [2022-03-20 15:16:37,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 395 transitions. [2022-03-20 15:16:37,015 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 395 transitions. Word has length 89 [2022-03-20 15:16:37,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:37,015 INFO L478 AbstractCegarLoop]: Abstraction has 296 states and 395 transitions. [2022-03-20 15:16:37,015 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 15:16:37,015 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 395 transitions. [2022-03-20 15:16:37,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 15:16:37,016 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:37,016 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:37,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:37,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 15:16:37,231 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:37,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:37,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1322512306, now seen corresponding path program 5 times [2022-03-20 15:16:37,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:37,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [949450219] [2022-03-20 15:16:37,232 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:37,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1322512306, now seen corresponding path program 6 times [2022-03-20 15:16:37,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:37,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392390895] [2022-03-20 15:16:37,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:37,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:37,237 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:37,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14721561] [2022-03-20 15:16:37,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:16:37,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:37,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:37,241 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:37,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 15:16:37,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-20 15:16:37,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:37,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 15:16:37,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 16 proven. 152 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:37,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 16 proven. 40 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 15:16:37,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:37,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392390895] [2022-03-20 15:16:37,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:37,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14721561] [2022-03-20 15:16:37,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14721561] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:37,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:37,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-20 15:16:37,762 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:37,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [949450219] [2022-03-20 15:16:37,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [949450219] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:37,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:37,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 15:16:37,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125267049] [2022-03-20 15:16:37,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:37,763 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 15:16:37,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:37,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 15:16:37,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:16:37,764 INFO L87 Difference]: Start difference. First operand 296 states and 395 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 15:16:37,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:37,977 INFO L93 Difference]: Finished difference Result 362 states and 486 transitions. [2022-03-20 15:16:37,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 15:16:37,977 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 89 [2022-03-20 15:16:37,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:37,979 INFO L225 Difference]: With dead ends: 362 [2022-03-20 15:16:37,979 INFO L226 Difference]: Without dead ends: 357 [2022-03-20 15:16:37,979 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2022-03-20 15:16:37,980 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 162 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:37,980 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 233 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:37,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-03-20 15:16:38,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 342. [2022-03-20 15:16:38,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 255 states have (on average 1.231372549019608) internal successors, (314), 261 states have internal predecessors, (314), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-20 15:16:38,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 460 transitions. [2022-03-20 15:16:38,030 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 460 transitions. Word has length 89 [2022-03-20 15:16:38,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:38,030 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 460 transitions. [2022-03-20 15:16:38,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 15:16:38,030 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 460 transitions. [2022-03-20 15:16:38,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 15:16:38,031 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:38,032 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:38,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:38,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 15:16:38,236 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:38,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:38,236 INFO L85 PathProgramCache]: Analyzing trace with hash -345961389, now seen corresponding path program 5 times [2022-03-20 15:16:38,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:38,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [682577393] [2022-03-20 15:16:38,236 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:38,237 INFO L85 PathProgramCache]: Analyzing trace with hash -345961389, now seen corresponding path program 6 times [2022-03-20 15:16:38,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:38,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397528286] [2022-03-20 15:16:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:38,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:38,252 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:38,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005316263] [2022-03-20 15:16:38,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:16:38,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:38,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:38,268 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:38,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 15:16:38,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-20 15:16:38,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:38,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 15:16:38,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 24 proven. 152 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:38,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 15:16:38,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:38,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397528286] [2022-03-20 15:16:38,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:38,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005316263] [2022-03-20 15:16:38,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005316263] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:38,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:38,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-20 15:16:38,849 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:38,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [682577393] [2022-03-20 15:16:38,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [682577393] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:38,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:38,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 15:16:38,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405813919] [2022-03-20 15:16:38,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:38,850 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 15:16:38,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:38,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 15:16:38,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-20 15:16:38,850 INFO L87 Difference]: Start difference. First operand 342 states and 460 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 15:16:39,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:39,060 INFO L93 Difference]: Finished difference Result 427 states and 585 transitions. [2022-03-20 15:16:39,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 15:16:39,061 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 91 [2022-03-20 15:16:39,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:39,063 INFO L225 Difference]: With dead ends: 427 [2022-03-20 15:16:39,063 INFO L226 Difference]: Without dead ends: 342 [2022-03-20 15:16:39,064 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=335, Invalid=477, Unknown=0, NotChecked=0, Total=812 [2022-03-20 15:16:39,064 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 93 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:39,067 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 218 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:39,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-03-20 15:16:39,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2022-03-20 15:16:39,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 255 states have (on average 1.2156862745098038) internal successors, (310), 261 states have internal predecessors, (310), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-20 15:16:39,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 456 transitions. [2022-03-20 15:16:39,138 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 456 transitions. Word has length 91 [2022-03-20 15:16:39,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:39,138 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 456 transitions. [2022-03-20 15:16:39,138 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 15:16:39,138 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 456 transitions. [2022-03-20 15:16:39,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 15:16:39,140 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:39,140 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:39,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:39,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 15:16:39,345 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:39,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:39,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1660747519, now seen corresponding path program 7 times [2022-03-20 15:16:39,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:39,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1620273424] [2022-03-20 15:16:39,346 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:39,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1660747519, now seen corresponding path program 8 times [2022-03-20 15:16:39,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:39,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401105029] [2022-03-20 15:16:39,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:39,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:39,359 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:39,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405641063] [2022-03-20 15:16:39,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:39,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:39,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:39,376 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:39,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 15:16:39,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:16:39,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:39,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 15:16:39,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:39,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-20 15:16:39,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:39,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401105029] [2022-03-20 15:16:39,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:39,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405641063] [2022-03-20 15:16:39,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405641063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:39,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:39,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-20 15:16:39,787 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:39,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1620273424] [2022-03-20 15:16:39,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1620273424] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:39,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:39,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 15:16:39,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621436873] [2022-03-20 15:16:39,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:39,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 15:16:39,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:39,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 15:16:39,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:16:39,788 INFO L87 Difference]: Start difference. First operand 342 states and 456 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 15:16:39,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:39,987 INFO L93 Difference]: Finished difference Result 467 states and 640 transitions. [2022-03-20 15:16:39,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 15:16:39,987 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 97 [2022-03-20 15:16:39,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:39,989 INFO L225 Difference]: With dead ends: 467 [2022-03-20 15:16:39,989 INFO L226 Difference]: Without dead ends: 352 [2022-03-20 15:16:39,990 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=383, Invalid=547, Unknown=0, NotChecked=0, Total=930 [2022-03-20 15:16:39,990 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 118 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:39,990 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 238 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:39,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-03-20 15:16:40,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 344. [2022-03-20 15:16:40,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 257 states have (on average 1.2101167315175096) internal successors, (311), 261 states have internal predecessors, (311), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-20 15:16:40,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 457 transitions. [2022-03-20 15:16:40,033 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 457 transitions. Word has length 97 [2022-03-20 15:16:40,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:40,034 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 457 transitions. [2022-03-20 15:16:40,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 15:16:40,034 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 457 transitions. [2022-03-20 15:16:40,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 15:16:40,035 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:40,035 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:40,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:40,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 15:16:40,251 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:40,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:40,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1020733748, now seen corresponding path program 7 times [2022-03-20 15:16:40,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:40,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1905788787] [2022-03-20 15:16:40,253 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:40,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1020733748, now seen corresponding path program 8 times [2022-03-20 15:16:40,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:40,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229343545] [2022-03-20 15:16:40,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:40,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:40,267 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:40,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133444705] [2022-03-20 15:16:40,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:40,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:40,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:40,268 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:40,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 15:16:40,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:16:40,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:40,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 15:16:40,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:40,436 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-03-20 15:16:40,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:16:40,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:40,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229343545] [2022-03-20 15:16:40,436 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:40,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133444705] [2022-03-20 15:16:40,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133444705] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:40,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:40,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 15:16:40,437 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:40,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1905788787] [2022-03-20 15:16:40,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1905788787] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:40,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:40,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 15:16:40,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743847960] [2022-03-20 15:16:40,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:40,437 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 15:16:40,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:40,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 15:16:40,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-20 15:16:40,438 INFO L87 Difference]: Start difference. First operand 344 states and 457 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 15:16:40,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:40,498 INFO L93 Difference]: Finished difference Result 504 states and 675 transitions. [2022-03-20 15:16:40,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 15:16:40,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 99 [2022-03-20 15:16:40,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:40,500 INFO L225 Difference]: With dead ends: 504 [2022-03-20 15:16:40,500 INFO L226 Difference]: Without dead ends: 362 [2022-03-20 15:16:40,501 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-20 15:16:40,504 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 12 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:40,504 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:16:40,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-03-20 15:16:40,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 352. [2022-03-20 15:16:40,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 265 states have (on average 1.2150943396226415) internal successors, (322), 269 states have internal predecessors, (322), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-20 15:16:40,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 468 transitions. [2022-03-20 15:16:40,551 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 468 transitions. Word has length 99 [2022-03-20 15:16:40,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:40,552 INFO L478 AbstractCegarLoop]: Abstraction has 352 states and 468 transitions. [2022-03-20 15:16:40,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 15:16:40,552 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 468 transitions. [2022-03-20 15:16:40,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 15:16:40,553 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:40,553 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:40,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:40,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 15:16:40,759 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:40,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:40,760 INFO L85 PathProgramCache]: Analyzing trace with hash 359487094, now seen corresponding path program 9 times [2022-03-20 15:16:40,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:40,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [38548740] [2022-03-20 15:16:40,760 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:40,760 INFO L85 PathProgramCache]: Analyzing trace with hash 359487094, now seen corresponding path program 10 times [2022-03-20 15:16:40,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:40,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535871566] [2022-03-20 15:16:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:40,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:40,771 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:40,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037926691] [2022-03-20 15:16:40,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:16:40,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:40,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:40,773 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:40,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 15:16:40,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:16:40,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:40,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 15:16:40,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 26 proven. 202 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:41,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-20 15:16:41,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:41,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535871566] [2022-03-20 15:16:41,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:41,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037926691] [2022-03-20 15:16:41,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037926691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:41,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:41,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-20 15:16:41,248 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:41,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [38548740] [2022-03-20 15:16:41,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [38548740] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:41,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:41,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 15:16:41,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523924222] [2022-03-20 15:16:41,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:41,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 15:16:41,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:41,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 15:16:41,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:16:41,249 INFO L87 Difference]: Start difference. First operand 352 states and 468 transitions. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 states have internal predecessors, (70), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 15:16:41,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:41,465 INFO L93 Difference]: Finished difference Result 471 states and 642 transitions. [2022-03-20 15:16:41,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 15:16:41,466 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 states have internal predecessors, (70), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 99 [2022-03-20 15:16:41,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:41,467 INFO L225 Difference]: With dead ends: 471 [2022-03-20 15:16:41,467 INFO L226 Difference]: Without dead ends: 364 [2022-03-20 15:16:41,467 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2022-03-20 15:16:41,468 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 133 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:41,468 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 219 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:41,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-03-20 15:16:41,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2022-03-20 15:16:41,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 277 states have (on average 1.2057761732851986) internal successors, (334), 277 states have internal predecessors, (334), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-20 15:16:41,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 480 transitions. [2022-03-20 15:16:41,518 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 480 transitions. Word has length 99 [2022-03-20 15:16:41,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:41,519 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 480 transitions. [2022-03-20 15:16:41,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 states have internal predecessors, (70), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 15:16:41,519 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 480 transitions. [2022-03-20 15:16:41,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 15:16:41,520 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:41,520 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:41,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:41,736 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:41,736 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:41,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:41,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1761003221, now seen corresponding path program 3 times [2022-03-20 15:16:41,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:41,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [339545369] [2022-03-20 15:16:41,737 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:41,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1761003221, now seen corresponding path program 4 times [2022-03-20 15:16:41,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:41,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970243112] [2022-03-20 15:16:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:41,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:41,741 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:41,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221209434] [2022-03-20 15:16:41,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:16:41,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:41,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:41,743 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:41,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 15:16:41,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:16:41,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:41,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 15:16:41,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:41,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 15:16:42,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:42,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970243112] [2022-03-20 15:16:42,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:42,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221209434] [2022-03-20 15:16:42,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221209434] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:42,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:42,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-20 15:16:42,261 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:42,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [339545369] [2022-03-20 15:16:42,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [339545369] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:42,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:42,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 15:16:42,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575283184] [2022-03-20 15:16:42,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:42,261 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 15:16:42,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:42,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 15:16:42,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:16:42,262 INFO L87 Difference]: Start difference. First operand 364 states and 480 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-20 15:16:42,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:42,492 INFO L93 Difference]: Finished difference Result 407 states and 538 transitions. [2022-03-20 15:16:42,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 15:16:42,494 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 103 [2022-03-20 15:16:42,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:42,496 INFO L225 Difference]: With dead ends: 407 [2022-03-20 15:16:42,496 INFO L226 Difference]: Without dead ends: 396 [2022-03-20 15:16:42,497 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=379, Invalid=551, Unknown=0, NotChecked=0, Total=930 [2022-03-20 15:16:42,497 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 117 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:42,497 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 273 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:42,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-03-20 15:16:42,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 377. [2022-03-20 15:16:42,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 281 states have (on average 1.206405693950178) internal successors, (339), 288 states have internal predecessors, (339), 82 states have call successors, (82), 15 states have call predecessors, (82), 13 states have return successors, (80), 73 states have call predecessors, (80), 80 states have call successors, (80) [2022-03-20 15:16:42,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 501 transitions. [2022-03-20 15:16:42,544 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 501 transitions. Word has length 103 [2022-03-20 15:16:42,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:42,545 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 501 transitions. [2022-03-20 15:16:42,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-20 15:16:42,545 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 501 transitions. [2022-03-20 15:16:42,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 15:16:42,546 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:42,546 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:42,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:42,762 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:42,762 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:42,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:42,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1733340336, now seen corresponding path program 9 times [2022-03-20 15:16:42,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:42,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [337970917] [2022-03-20 15:16:42,763 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:42,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1733340336, now seen corresponding path program 10 times [2022-03-20 15:16:42,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:42,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691825270] [2022-03-20 15:16:42,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:42,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:42,768 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:42,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402319220] [2022-03-20 15:16:42,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:16:42,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:42,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:42,770 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:42,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 15:16:42,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:16:42,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:42,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 15:16:42,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 60 proven. 24 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 15:16:42,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 60 proven. 24 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 15:16:43,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:43,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691825270] [2022-03-20 15:16:43,081 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:43,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402319220] [2022-03-20 15:16:43,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402319220] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:43,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:43,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 15:16:43,082 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:43,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [337970917] [2022-03-20 15:16:43,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [337970917] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:43,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:43,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:16:43,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171325280] [2022-03-20 15:16:43,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:43,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 15:16:43,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:43,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 15:16:43,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:16:43,083 INFO L87 Difference]: Start difference. First operand 377 states and 501 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 15:16:43,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:43,276 INFO L93 Difference]: Finished difference Result 649 states and 907 transitions. [2022-03-20 15:16:43,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 15:16:43,277 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 105 [2022-03-20 15:16:43,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:43,279 INFO L225 Difference]: With dead ends: 649 [2022-03-20 15:16:43,279 INFO L226 Difference]: Without dead ends: 588 [2022-03-20 15:16:43,280 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 15:16:43,280 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 38 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:43,280 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 344 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:43,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-03-20 15:16:43,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 504. [2022-03-20 15:16:43,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 376 states have (on average 1.247340425531915) internal successors, (469), 386 states have internal predecessors, (469), 114 states have call successors, (114), 15 states have call predecessors, (114), 13 states have return successors, (112), 102 states have call predecessors, (112), 112 states have call successors, (112) [2022-03-20 15:16:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 695 transitions. [2022-03-20 15:16:43,371 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 695 transitions. Word has length 105 [2022-03-20 15:16:43,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:43,372 INFO L478 AbstractCegarLoop]: Abstraction has 504 states and 695 transitions. [2022-03-20 15:16:43,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 15:16:43,372 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 695 transitions. [2022-03-20 15:16:43,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 15:16:43,373 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:43,373 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:43,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:43,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:43,587 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:43,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:43,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1666981150, now seen corresponding path program 11 times [2022-03-20 15:16:43,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:43,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [497610886] [2022-03-20 15:16:43,588 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:43,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1666981150, now seen corresponding path program 12 times [2022-03-20 15:16:43,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:43,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140143159] [2022-03-20 15:16:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:43,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:43,595 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:43,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798009001] [2022-03-20 15:16:43,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:16:43,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:43,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:43,597 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:43,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 15:16:43,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 15:16:43,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:43,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 15:16:43,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 24 proven. 242 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:43,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 24 proven. 62 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 15:16:44,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:44,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140143159] [2022-03-20 15:16:44,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:44,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798009001] [2022-03-20 15:16:44,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798009001] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:44,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:44,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-20 15:16:44,187 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:44,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [497610886] [2022-03-20 15:16:44,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [497610886] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:44,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:44,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 15:16:44,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184662876] [2022-03-20 15:16:44,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:44,188 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 15:16:44,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:44,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 15:16:44,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:16:44,188 INFO L87 Difference]: Start difference. First operand 504 states and 695 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-20 15:16:44,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:44,429 INFO L93 Difference]: Finished difference Result 753 states and 1073 transitions. [2022-03-20 15:16:44,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 15:16:44,429 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 105 [2022-03-20 15:16:44,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:44,431 INFO L225 Difference]: With dead ends: 753 [2022-03-20 15:16:44,431 INFO L226 Difference]: Without dead ends: 532 [2022-03-20 15:16:44,432 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=404, Invalid=588, Unknown=0, NotChecked=0, Total=992 [2022-03-20 15:16:44,433 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 152 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:44,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 238 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:44,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-03-20 15:16:44,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 522. [2022-03-20 15:16:44,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 394 states have (on average 1.2461928934010151) internal successors, (491), 398 states have internal predecessors, (491), 114 states have call successors, (114), 15 states have call predecessors, (114), 13 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2022-03-20 15:16:44,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 717 transitions. [2022-03-20 15:16:44,523 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 717 transitions. Word has length 105 [2022-03-20 15:16:44,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:44,523 INFO L478 AbstractCegarLoop]: Abstraction has 522 states and 717 transitions. [2022-03-20 15:16:44,523 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-20 15:16:44,523 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 717 transitions. [2022-03-20 15:16:44,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 15:16:44,524 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:44,525 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 7, 6, 6, 6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:44,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:44,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-20 15:16:44,739 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:44,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:44,740 INFO L85 PathProgramCache]: Analyzing trace with hash -2132095591, now seen corresponding path program 11 times [2022-03-20 15:16:44,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:44,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1890699032] [2022-03-20 15:16:44,740 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:44,740 INFO L85 PathProgramCache]: Analyzing trace with hash -2132095591, now seen corresponding path program 12 times [2022-03-20 15:16:44,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:44,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508835073] [2022-03-20 15:16:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:44,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:44,744 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:44,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526788633] [2022-03-20 15:16:44,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:16:44,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:44,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:44,746 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:44,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 15:16:44,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 15:16:44,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:44,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 15:16:44,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 28 proven. 260 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:45,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 28 proven. 80 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 15:16:45,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:45,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508835073] [2022-03-20 15:16:45,349 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:45,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526788633] [2022-03-20 15:16:45,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526788633] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:45,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:45,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-20 15:16:45,349 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:45,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1890699032] [2022-03-20 15:16:45,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1890699032] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:45,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:45,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 15:16:45,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143246228] [2022-03-20 15:16:45,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:45,349 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 15:16:45,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:45,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 15:16:45,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:16:45,350 INFO L87 Difference]: Start difference. First operand 522 states and 717 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-20 15:16:45,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:45,621 INFO L93 Difference]: Finished difference Result 735 states and 1041 transitions. [2022-03-20 15:16:45,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 15:16:45,621 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 107 [2022-03-20 15:16:45,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:45,623 INFO L225 Difference]: With dead ends: 735 [2022-03-20 15:16:45,623 INFO L226 Difference]: Without dead ends: 538 [2022-03-20 15:16:45,624 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=434, Invalid=622, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 15:16:45,625 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 140 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:45,625 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 240 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:45,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-03-20 15:16:45,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2022-03-20 15:16:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 410 states have (on average 1.2365853658536585) internal successors, (507), 410 states have internal predecessors, (507), 114 states have call successors, (114), 15 states have call predecessors, (114), 13 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2022-03-20 15:16:45,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 733 transitions. [2022-03-20 15:16:45,715 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 733 transitions. Word has length 107 [2022-03-20 15:16:45,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:45,716 INFO L478 AbstractCegarLoop]: Abstraction has 538 states and 733 transitions. [2022-03-20 15:16:45,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-20 15:16:45,716 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 733 transitions. [2022-03-20 15:16:45,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 15:16:45,717 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:45,717 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:45,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:45,921 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:45,921 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:45,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:45,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1965005106, now seen corresponding path program 5 times [2022-03-20 15:16:45,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:45,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [334357737] [2022-03-20 15:16:45,922 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:45,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1965005106, now seen corresponding path program 6 times [2022-03-20 15:16:45,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:45,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277656427] [2022-03-20 15:16:45,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:45,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:45,927 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:45,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467079161] [2022-03-20 15:16:45,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:16:45,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:45,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:45,928 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:45,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 15:16:46,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 15:16:46,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:46,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 15:16:46,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 22 proven. 292 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:46,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 22 proven. 72 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 15:16:46,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:46,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277656427] [2022-03-20 15:16:46,443 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:46,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467079161] [2022-03-20 15:16:46,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467079161] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:46,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:46,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2022-03-20 15:16:46,443 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:46,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [334357737] [2022-03-20 15:16:46,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [334357737] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:46,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:46,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 15:16:46,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884074370] [2022-03-20 15:16:46,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:46,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 15:16:46,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:46,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 15:16:46,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:16:46,444 INFO L87 Difference]: Start difference. First operand 538 states and 733 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 14 states have internal predecessors, (78), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 15:16:46,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:46,716 INFO L93 Difference]: Finished difference Result 593 states and 810 transitions. [2022-03-20 15:16:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 15:16:46,717 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 14 states have internal predecessors, (78), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 111 [2022-03-20 15:16:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:46,719 INFO L225 Difference]: With dead ends: 593 [2022-03-20 15:16:46,719 INFO L226 Difference]: Without dead ends: 582 [2022-03-20 15:16:46,719 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=399, Invalid=593, Unknown=0, NotChecked=0, Total=992 [2022-03-20 15:16:46,719 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 172 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:46,720 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 266 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:46,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-03-20 15:16:46,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 560. [2022-03-20 15:16:46,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 418 states have (on average 1.2344497607655502) internal successors, (516), 428 states have internal predecessors, (516), 127 states have call successors, (127), 16 states have call predecessors, (127), 14 states have return successors, (125), 115 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-20 15:16:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 768 transitions. [2022-03-20 15:16:46,806 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 768 transitions. Word has length 111 [2022-03-20 15:16:46,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:46,806 INFO L478 AbstractCegarLoop]: Abstraction has 560 states and 768 transitions. [2022-03-20 15:16:46,806 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 14 states have internal predecessors, (78), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 15:16:46,807 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 768 transitions. [2022-03-20 15:16:46,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 15:16:46,808 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:46,808 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:46,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:47,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 15:16:47,012 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:47,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:47,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1038942829, now seen corresponding path program 13 times [2022-03-20 15:16:47,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:47,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [404075158] [2022-03-20 15:16:47,012 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:47,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1038942829, now seen corresponding path program 14 times [2022-03-20 15:16:47,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:47,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403398982] [2022-03-20 15:16:47,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:47,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:47,017 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:47,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503992482] [2022-03-20 15:16:47,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:47,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:47,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:47,018 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:47,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 15:16:47,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:16:47,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:47,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 15:16:47,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 46 proven. 56 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 15:16:47,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 34 proven. 68 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 15:16:47,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:47,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403398982] [2022-03-20 15:16:47,480 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:47,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503992482] [2022-03-20 15:16:47,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503992482] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:47,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:47,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 15:16:47,480 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:47,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [404075158] [2022-03-20 15:16:47,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [404075158] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:47,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:47,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 15:16:47,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487779081] [2022-03-20 15:16:47,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:47,481 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 15:16:47,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:47,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 15:16:47,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:16:47,481 INFO L87 Difference]: Start difference. First operand 560 states and 768 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 8 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-20 15:16:47,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:47,737 INFO L93 Difference]: Finished difference Result 862 states and 1224 transitions. [2022-03-20 15:16:47,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 15:16:47,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 8 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 113 [2022-03-20 15:16:47,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:47,740 INFO L225 Difference]: With dead ends: 862 [2022-03-20 15:16:47,740 INFO L226 Difference]: Without dead ends: 711 [2022-03-20 15:16:47,740 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2022-03-20 15:16:47,741 INFO L913 BasicCegarLoop]: 106 mSDtfsCounter, 76 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:47,741 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 435 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:47,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-03-20 15:16:47,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 560. [2022-03-20 15:16:47,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 418 states have (on average 1.2344497607655502) internal successors, (516), 428 states have internal predecessors, (516), 127 states have call successors, (127), 16 states have call predecessors, (127), 14 states have return successors, (125), 115 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-20 15:16:47,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 768 transitions. [2022-03-20 15:16:47,848 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 768 transitions. Word has length 113 [2022-03-20 15:16:47,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:47,848 INFO L478 AbstractCegarLoop]: Abstraction has 560 states and 768 transitions. [2022-03-20 15:16:47,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 8 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-20 15:16:47,848 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 768 transitions. [2022-03-20 15:16:47,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 15:16:47,850 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:47,850 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:47,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:48,065 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:48,066 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:48,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:48,066 INFO L85 PathProgramCache]: Analyzing trace with hash -144297019, now seen corresponding path program 15 times [2022-03-20 15:16:48,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:48,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1362537264] [2022-03-20 15:16:48,066 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:48,066 INFO L85 PathProgramCache]: Analyzing trace with hash -144297019, now seen corresponding path program 16 times [2022-03-20 15:16:48,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:48,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343064053] [2022-03-20 15:16:48,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:48,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:48,071 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:48,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45388919] [2022-03-20 15:16:48,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:16:48,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:48,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:48,073 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:48,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 15:16:48,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:16:48,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:48,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 15:16:48,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 26 proven. 302 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:48,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 26 proven. 82 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 15:16:48,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:48,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343064053] [2022-03-20 15:16:48,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:48,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45388919] [2022-03-20 15:16:48,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45388919] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:48,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:48,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2022-03-20 15:16:48,740 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:48,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1362537264] [2022-03-20 15:16:48,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1362537264] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:48,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:48,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 15:16:48,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760252259] [2022-03-20 15:16:48,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:48,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 15:16:48,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:48,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 15:16:48,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:16:48,741 INFO L87 Difference]: Start difference. First operand 560 states and 768 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 15:16:49,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:49,058 INFO L93 Difference]: Finished difference Result 781 states and 1101 transitions. [2022-03-20 15:16:49,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 15:16:49,058 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 113 [2022-03-20 15:16:49,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:49,060 INFO L225 Difference]: With dead ends: 781 [2022-03-20 15:16:49,061 INFO L226 Difference]: Without dead ends: 588 [2022-03-20 15:16:49,061 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=425, Invalid=631, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 15:16:49,064 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 180 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:49,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 262 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:16:49,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-03-20 15:16:49,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 578. [2022-03-20 15:16:49,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 436 states have (on average 1.2339449541284404) internal successors, (538), 440 states have internal predecessors, (538), 127 states have call successors, (127), 16 states have call predecessors, (127), 14 states have return successors, (125), 121 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-20 15:16:49,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 790 transitions. [2022-03-20 15:16:49,168 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 790 transitions. Word has length 113 [2022-03-20 15:16:49,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:49,168 INFO L478 AbstractCegarLoop]: Abstraction has 578 states and 790 transitions. [2022-03-20 15:16:49,168 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 15:16:49,168 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 790 transitions. [2022-03-20 15:16:49,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 15:16:49,169 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:49,169 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:49,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:49,374 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-20 15:16:49,374 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:49,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:49,375 INFO L85 PathProgramCache]: Analyzing trace with hash 533963976, now seen corresponding path program 13 times [2022-03-20 15:16:49,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:49,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [21389566] [2022-03-20 15:16:49,375 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:49,375 INFO L85 PathProgramCache]: Analyzing trace with hash 533963976, now seen corresponding path program 14 times [2022-03-20 15:16:49,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:49,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233916970] [2022-03-20 15:16:49,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:49,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:49,380 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:49,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719176279] [2022-03-20 15:16:49,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:49,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:49,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:49,386 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:49,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 15:16:49,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:16:49,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:49,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 15:16:49,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 36 proven. 288 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:49,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 36 proven. 68 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 15:16:49,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:49,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233916970] [2022-03-20 15:16:49,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:49,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719176279] [2022-03-20 15:16:49,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719176279] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:49,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:49,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2022-03-20 15:16:49,935 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:49,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [21389566] [2022-03-20 15:16:49,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [21389566] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:49,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:49,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 15:16:49,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946043690] [2022-03-20 15:16:49,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:49,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 15:16:49,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:49,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 15:16:49,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:16:49,937 INFO L87 Difference]: Start difference. First operand 578 states and 790 transitions. Second operand has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 15:16:50,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:50,358 INFO L93 Difference]: Finished difference Result 791 states and 1114 transitions. [2022-03-20 15:16:50,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 15:16:50,359 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 115 [2022-03-20 15:16:50,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:50,368 INFO L225 Difference]: With dead ends: 791 [2022-03-20 15:16:50,368 INFO L226 Difference]: Without dead ends: 594 [2022-03-20 15:16:50,369 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=456, Invalid=666, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 15:16:50,369 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 138 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:50,370 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 286 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:16:50,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-03-20 15:16:50,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 594. [2022-03-20 15:16:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 452 states have (on average 1.2256637168141593) internal successors, (554), 452 states have internal predecessors, (554), 127 states have call successors, (127), 16 states have call predecessors, (127), 14 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-20 15:16:50,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 806 transitions. [2022-03-20 15:16:50,579 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 806 transitions. Word has length 115 [2022-03-20 15:16:50,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:50,579 INFO L478 AbstractCegarLoop]: Abstraction has 594 states and 806 transitions. [2022-03-20 15:16:50,579 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 15:16:50,579 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 806 transitions. [2022-03-20 15:16:50,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-20 15:16:50,593 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:50,593 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:50,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:50,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-20 15:16:50,797 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:50,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:50,797 INFO L85 PathProgramCache]: Analyzing trace with hash 650985841, now seen corresponding path program 7 times [2022-03-20 15:16:50,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:50,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [145460353] [2022-03-20 15:16:50,797 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:50,797 INFO L85 PathProgramCache]: Analyzing trace with hash 650985841, now seen corresponding path program 8 times [2022-03-20 15:16:50,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:50,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072046758] [2022-03-20 15:16:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:50,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:50,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:50,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069378598] [2022-03-20 15:16:50,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:50,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:50,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:50,815 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:50,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 15:16:50,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:16:50,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:50,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 15:16:50,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 24 proven. 356 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:51,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 24 proven. 92 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 15:16:51,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:51,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072046758] [2022-03-20 15:16:51,531 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:51,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069378598] [2022-03-20 15:16:51,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069378598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:51,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:51,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2022-03-20 15:16:51,532 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:51,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [145460353] [2022-03-20 15:16:51,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [145460353] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:51,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:51,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 15:16:51,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101901548] [2022-03-20 15:16:51,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:51,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 15:16:51,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:51,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 15:16:51,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:16:51,533 INFO L87 Difference]: Start difference. First operand 594 states and 806 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 15:16:52,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:52,124 INFO L93 Difference]: Finished difference Result 649 states and 883 transitions. [2022-03-20 15:16:52,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 15:16:52,124 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 119 [2022-03-20 15:16:52,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:52,127 INFO L225 Difference]: With dead ends: 649 [2022-03-20 15:16:52,127 INFO L226 Difference]: Without dead ends: 638 [2022-03-20 15:16:52,143 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=419, Invalid=637, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 15:16:52,144 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 243 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:52,144 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 279 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 15:16:52,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-03-20 15:16:52,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 616. [2022-03-20 15:16:52,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 460 states have (on average 1.2239130434782608) internal successors, (563), 470 states have internal predecessors, (563), 140 states have call successors, (140), 17 states have call predecessors, (140), 15 states have return successors, (138), 128 states have call predecessors, (138), 138 states have call successors, (138) [2022-03-20 15:16:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 841 transitions. [2022-03-20 15:16:52,313 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 841 transitions. Word has length 119 [2022-03-20 15:16:52,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:52,313 INFO L478 AbstractCegarLoop]: Abstraction has 616 states and 841 transitions. [2022-03-20 15:16:52,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 15:16:52,313 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 841 transitions. [2022-03-20 15:16:52,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 15:16:52,314 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:52,314 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 7, 7, 7, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:52,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:52,530 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 15:16:52,531 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:52,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:52,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1267134888, now seen corresponding path program 17 times [2022-03-20 15:16:52,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:52,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1925840897] [2022-03-20 15:16:52,531 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:52,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1267134888, now seen corresponding path program 18 times [2022-03-20 15:16:52,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:52,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323697813] [2022-03-20 15:16:52,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:52,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:52,536 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:52,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433157382] [2022-03-20 15:16:52,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:16:52,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:52,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:52,546 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:52,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 15:16:53,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-20 15:16:53,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:53,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 15:16:53,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:53,427 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 28 proven. 370 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:53,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 28 proven. 106 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 15:16:53,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:53,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323697813] [2022-03-20 15:16:53,666 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:53,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433157382] [2022-03-20 15:16:53,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433157382] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:53,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:53,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2022-03-20 15:16:53,667 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:53,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1925840897] [2022-03-20 15:16:53,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1925840897] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:53,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:53,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 15:16:53,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602229216] [2022-03-20 15:16:53,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:53,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 15:16:53,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:53,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 15:16:53,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:16:53,668 INFO L87 Difference]: Start difference. First operand 616 states and 841 transitions. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 15:16:54,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:54,025 INFO L93 Difference]: Finished difference Result 837 states and 1174 transitions. [2022-03-20 15:16:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 15:16:54,026 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 121 [2022-03-20 15:16:54,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:54,028 INFO L225 Difference]: With dead ends: 837 [2022-03-20 15:16:54,028 INFO L226 Difference]: Without dead ends: 644 [2022-03-20 15:16:54,029 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=446, Invalid=676, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 15:16:54,029 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 224 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:54,029 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 271 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:16:54,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-03-20 15:16:54,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 634. [2022-03-20 15:16:54,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 478 states have (on average 1.2238493723849373) internal successors, (585), 482 states have internal predecessors, (585), 140 states have call successors, (140), 17 states have call predecessors, (140), 15 states have return successors, (138), 134 states have call predecessors, (138), 138 states have call successors, (138) [2022-03-20 15:16:54,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 863 transitions. [2022-03-20 15:16:54,208 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 863 transitions. Word has length 121 [2022-03-20 15:16:54,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:54,208 INFO L478 AbstractCegarLoop]: Abstraction has 634 states and 863 transitions. [2022-03-20 15:16:54,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 15:16:54,209 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 863 transitions. [2022-03-20 15:16:54,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-20 15:16:54,210 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:54,210 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:54,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:54,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 15:16:54,415 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:54,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:54,416 INFO L85 PathProgramCache]: Analyzing trace with hash 487500267, now seen corresponding path program 15 times [2022-03-20 15:16:54,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:54,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [719698478] [2022-03-20 15:16:54,417 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:54,417 INFO L85 PathProgramCache]: Analyzing trace with hash 487500267, now seen corresponding path program 16 times [2022-03-20 15:16:54,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:54,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285920024] [2022-03-20 15:16:54,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:54,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:54,422 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:54,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37243199] [2022-03-20 15:16:54,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:16:54,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:54,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:54,436 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:54,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 15:16:54,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:16:54,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:54,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 15:16:54,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 38 proven. 350 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:54,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:55,038 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 38 proven. 86 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 15:16:55,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:55,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285920024] [2022-03-20 15:16:55,038 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:55,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37243199] [2022-03-20 15:16:55,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37243199] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:55,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:55,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2022-03-20 15:16:55,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:55,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [719698478] [2022-03-20 15:16:55,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [719698478] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:55,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:55,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 15:16:55,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513287165] [2022-03-20 15:16:55,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:55,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 15:16:55,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:55,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 15:16:55,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:16:55,040 INFO L87 Difference]: Start difference. First operand 634 states and 863 transitions. Second operand has 16 states, 16 states have (on average 5.5) internal successors, (88), 15 states have internal predecessors, (88), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 15:16:55,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:55,434 INFO L93 Difference]: Finished difference Result 847 states and 1187 transitions. [2022-03-20 15:16:55,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 15:16:55,435 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 15 states have internal predecessors, (88), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 123 [2022-03-20 15:16:55,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:55,437 INFO L225 Difference]: With dead ends: 847 [2022-03-20 15:16:55,437 INFO L226 Difference]: Without dead ends: 650 [2022-03-20 15:16:55,438 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=478, Invalid=712, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 15:16:55,438 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 173 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:55,438 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 292 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:16:55,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-03-20 15:16:55,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 650. [2022-03-20 15:16:55,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 494 states have (on average 1.2165991902834008) internal successors, (601), 494 states have internal predecessors, (601), 140 states have call successors, (140), 17 states have call predecessors, (140), 15 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2022-03-20 15:16:55,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 879 transitions. [2022-03-20 15:16:55,552 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 879 transitions. Word has length 123 [2022-03-20 15:16:55,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:55,552 INFO L478 AbstractCegarLoop]: Abstraction has 650 states and 879 transitions. [2022-03-20 15:16:55,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 15 states have internal predecessors, (88), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 15:16:55,552 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 879 transitions. [2022-03-20 15:16:55,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 15:16:55,554 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:55,554 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 7, 7, 7, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:55,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:55,770 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:55,770 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:55,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:55,770 INFO L85 PathProgramCache]: Analyzing trace with hash -992818924, now seen corresponding path program 9 times [2022-03-20 15:16:55,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:55,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [802768384] [2022-03-20 15:16:55,771 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:55,771 INFO L85 PathProgramCache]: Analyzing trace with hash -992818924, now seen corresponding path program 10 times [2022-03-20 15:16:55,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:55,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367906538] [2022-03-20 15:16:55,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:55,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:55,775 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:55,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917783768] [2022-03-20 15:16:55,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:16:55,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:55,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:55,777 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:55,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 15:16:55,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:16:55,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:55,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 15:16:55,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 26 proven. 428 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:56,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:56,358 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 26 proven. 116 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 15:16:56,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:56,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367906538] [2022-03-20 15:16:56,358 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:56,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917783768] [2022-03-20 15:16:56,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917783768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:56,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:56,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-03-20 15:16:56,358 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:56,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [802768384] [2022-03-20 15:16:56,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [802768384] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:56,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:56,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 15:16:56,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005300872] [2022-03-20 15:16:56,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:56,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 15:16:56,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:56,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 15:16:56,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:16:56,359 INFO L87 Difference]: Start difference. First operand 650 states and 879 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 16 states have internal predecessors, (90), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-20 15:16:56,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:56,698 INFO L93 Difference]: Finished difference Result 705 states and 956 transitions. [2022-03-20 15:16:56,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 15:16:56,698 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 16 states have internal predecessors, (90), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 127 [2022-03-20 15:16:56,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:56,701 INFO L225 Difference]: With dead ends: 705 [2022-03-20 15:16:56,701 INFO L226 Difference]: Without dead ends: 694 [2022-03-20 15:16:56,701 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=439, Invalid=683, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 15:16:56,701 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 212 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:56,702 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 297 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:56,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-03-20 15:16:56,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 672. [2022-03-20 15:16:56,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 502 states have (on average 1.2151394422310757) internal successors, (610), 512 states have internal predecessors, (610), 153 states have call successors, (153), 18 states have call predecessors, (153), 16 states have return successors, (151), 141 states have call predecessors, (151), 151 states have call successors, (151) [2022-03-20 15:16:56,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 914 transitions. [2022-03-20 15:16:56,820 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 914 transitions. Word has length 127 [2022-03-20 15:16:56,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:56,820 INFO L478 AbstractCegarLoop]: Abstraction has 672 states and 914 transitions. [2022-03-20 15:16:56,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 16 states have internal predecessors, (90), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-20 15:16:56,820 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 914 transitions. [2022-03-20 15:16:56,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 15:16:56,821 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:56,821 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:56,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:57,037 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:57,037 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:57,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:57,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1410231607, now seen corresponding path program 19 times [2022-03-20 15:16:57,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:57,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1204262593] [2022-03-20 15:16:57,038 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:57,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1410231607, now seen corresponding path program 20 times [2022-03-20 15:16:57,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:57,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686288485] [2022-03-20 15:16:57,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:57,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:57,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:57,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355288818] [2022-03-20 15:16:57,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:57,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:57,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:57,045 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:57,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 15:16:57,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:16:57,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:57,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 15:16:57,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 32 proven. 416 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:57,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 32 proven. 104 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 15:16:57,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:57,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686288485] [2022-03-20 15:16:57,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:57,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355288818] [2022-03-20 15:16:57,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355288818] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:57,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:57,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-03-20 15:16:57,598 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:57,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1204262593] [2022-03-20 15:16:57,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1204262593] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:57,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:57,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 15:16:57,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600347461] [2022-03-20 15:16:57,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:57,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 15:16:57,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:57,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 15:16:57,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:16:57,600 INFO L87 Difference]: Start difference. First operand 672 states and 914 transitions. Second operand has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 16 states have internal predecessors, (92), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-20 15:16:57,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:57,959 INFO L93 Difference]: Finished difference Result 893 states and 1247 transitions. [2022-03-20 15:16:57,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 15:16:57,960 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 16 states have internal predecessors, (92), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 129 [2022-03-20 15:16:57,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:57,962 INFO L225 Difference]: With dead ends: 893 [2022-03-20 15:16:57,962 INFO L226 Difference]: Without dead ends: 700 [2022-03-20 15:16:57,963 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=467, Invalid=723, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 15:16:57,963 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 185 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:57,963 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 322 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:16:57,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-03-20 15:16:58,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 690. [2022-03-20 15:16:58,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 520 states have (on average 1.2153846153846153) internal successors, (632), 524 states have internal predecessors, (632), 153 states have call successors, (153), 18 states have call predecessors, (153), 16 states have return successors, (151), 147 states have call predecessors, (151), 151 states have call successors, (151) [2022-03-20 15:16:58,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 936 transitions. [2022-03-20 15:16:58,093 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 936 transitions. Word has length 129 [2022-03-20 15:16:58,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:58,094 INFO L478 AbstractCegarLoop]: Abstraction has 690 states and 936 transitions. [2022-03-20 15:16:58,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 16 states have internal predecessors, (92), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-20 15:16:58,094 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 936 transitions. [2022-03-20 15:16:58,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 15:16:58,095 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:58,095 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:58,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:58,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-20 15:16:58,311 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:58,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:58,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1255136270, now seen corresponding path program 17 times [2022-03-20 15:16:58,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:58,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1101233244] [2022-03-20 15:16:58,312 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:58,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1255136270, now seen corresponding path program 18 times [2022-03-20 15:16:58,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:58,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015360889] [2022-03-20 15:16:58,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:58,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:58,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:58,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817156381] [2022-03-20 15:16:58,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:16:58,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:58,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:58,317 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:58,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 15:16:58,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 15:16:58,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:58,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 15:16:58,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 40 proven. 420 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:16:58,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 40 proven. 108 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 15:16:58,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:58,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015360889] [2022-03-20 15:16:58,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:58,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817156381] [2022-03-20 15:16:58,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817156381] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:58,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:58,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-03-20 15:16:58,905 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:58,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1101233244] [2022-03-20 15:16:58,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1101233244] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:58,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:58,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 15:16:58,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246571232] [2022-03-20 15:16:58,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:58,906 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 15:16:58,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:58,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 15:16:58,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:16:58,906 INFO L87 Difference]: Start difference. First operand 690 states and 936 transitions. Second operand has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 16 states have internal predecessors, (94), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-20 15:16:59,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:59,261 INFO L93 Difference]: Finished difference Result 903 states and 1260 transitions. [2022-03-20 15:16:59,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 15:16:59,261 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 16 states have internal predecessors, (94), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 131 [2022-03-20 15:16:59,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:59,264 INFO L225 Difference]: With dead ends: 903 [2022-03-20 15:16:59,264 INFO L226 Difference]: Without dead ends: 706 [2022-03-20 15:16:59,265 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=500, Invalid=760, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 15:16:59,265 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 230 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:59,274 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 302 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:16:59,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-03-20 15:16:59,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 706. [2022-03-20 15:16:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 536 states have (on average 1.208955223880597) internal successors, (648), 536 states have internal predecessors, (648), 153 states have call successors, (153), 18 states have call predecessors, (153), 16 states have return successors, (151), 151 states have call predecessors, (151), 151 states have call successors, (151) [2022-03-20 15:16:59,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 952 transitions. [2022-03-20 15:16:59,400 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 952 transitions. Word has length 131 [2022-03-20 15:16:59,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:59,400 INFO L478 AbstractCegarLoop]: Abstraction has 706 states and 952 transitions. [2022-03-20 15:16:59,400 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 16 states have internal predecessors, (94), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-20 15:16:59,400 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 952 transitions. [2022-03-20 15:16:59,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 15:16:59,401 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:59,401 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:59,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:59,605 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:59,606 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:59,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:59,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1252937077, now seen corresponding path program 11 times [2022-03-20 15:16:59,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:59,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1162388480] [2022-03-20 15:16:59,606 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:59,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1252937077, now seen corresponding path program 12 times [2022-03-20 15:16:59,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:59,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579129255] [2022-03-20 15:16:59,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:59,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:59,611 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:59,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1064531858] [2022-03-20 15:16:59,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:16:59,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:59,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:59,612 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:59,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 15:16:59,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 15:16:59,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:59,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 15:16:59,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 88 proven. 1 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2022-03-20 15:16:59,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:17:01,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:17:01,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579129255] [2022-03-20 15:17:01,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:17:01,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064531858] [2022-03-20 15:17:01,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064531858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:17:01,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:17:01,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 15:17:01,792 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:17:01,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1162388480] [2022-03-20 15:17:01,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1162388480] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:17:01,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:17:01,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 15:17:01,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261195652] [2022-03-20 15:17:01,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:17:01,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 15:17:01,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:01,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 15:17:01,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=84, Unknown=1, NotChecked=0, Total=110 [2022-03-20 15:17:01,793 INFO L87 Difference]: Start difference. First operand 706 states and 952 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 15:17:02,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:17:02,047 INFO L93 Difference]: Finished difference Result 758 states and 1028 transitions. [2022-03-20 15:17:02,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 15:17:02,047 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 135 [2022-03-20 15:17:02,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:17:02,050 INFO L225 Difference]: With dead ends: 758 [2022-03-20 15:17:02,050 INFO L226 Difference]: Without dead ends: 746 [2022-03-20 15:17:02,050 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=43, Invalid=138, Unknown=1, NotChecked=0, Total=182 [2022-03-20 15:17:02,053 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 28 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:17:02,053 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 300 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:17:02,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-03-20 15:17:02,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 683. [2022-03-20 15:17:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 515 states have (on average 1.192233009708738) internal successors, (614), 522 states have internal predecessors, (614), 150 states have call successors, (150), 19 states have call predecessors, (150), 17 states have return successors, (148), 141 states have call predecessors, (148), 148 states have call successors, (148) [2022-03-20 15:17:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 912 transitions. [2022-03-20 15:17:02,187 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 912 transitions. Word has length 135 [2022-03-20 15:17:02,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:17:02,187 INFO L478 AbstractCegarLoop]: Abstraction has 683 states and 912 transitions. [2022-03-20 15:17:02,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 15:17:02,187 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 912 transitions. [2022-03-20 15:17:02,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 15:17:02,189 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:17:02,189 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 8, 8, 8, 8, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:17:02,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-20 15:17:02,394 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-20 15:17:02,394 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:17:02,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:17:02,394 INFO L85 PathProgramCache]: Analyzing trace with hash 200539575, now seen corresponding path program 13 times [2022-03-20 15:17:02,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:02,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1343799134] [2022-03-20 15:17:02,395 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:17:02,395 INFO L85 PathProgramCache]: Analyzing trace with hash 200539575, now seen corresponding path program 14 times [2022-03-20 15:17:02,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:17:02,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147451420] [2022-03-20 15:17:02,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:17:02,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:17:02,402 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:17:02,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364244841] [2022-03-20 15:17:02,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:17:02,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:02,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:17:02,420 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:17:02,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 15:17:02,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:17:02,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:17:02,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 15:17:02,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:17:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 28 proven. 508 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:17:02,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:17:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 28 proven. 144 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-20 15:17:03,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:17:03,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147451420] [2022-03-20 15:17:03,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:17:03,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364244841] [2022-03-20 15:17:03,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364244841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:17:03,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:17:03,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2022-03-20 15:17:03,131 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:17:03,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1343799134] [2022-03-20 15:17:03,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1343799134] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:17:03,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:17:03,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 15:17:03,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355010016] [2022-03-20 15:17:03,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:17:03,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 15:17:03,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:03,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 15:17:03,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:17:03,132 INFO L87 Difference]: Start difference. First operand 683 states and 912 transitions. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 17 states have internal predecessors, (96), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-20 15:17:03,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:17:03,615 INFO L93 Difference]: Finished difference Result 734 states and 982 transitions. [2022-03-20 15:17:03,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 15:17:03,615 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 17 states have internal predecessors, (96), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 135 [2022-03-20 15:17:03,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:17:03,618 INFO L225 Difference]: With dead ends: 734 [2022-03-20 15:17:03,618 INFO L226 Difference]: Without dead ends: 729 [2022-03-20 15:17:03,619 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 15:17:03,619 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 227 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:17:03,620 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 315 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 15:17:03,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-03-20 15:17:03,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 707. [2022-03-20 15:17:03,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 525 states have (on average 1.1923809523809523) internal successors, (626), 542 states have internal predecessors, (626), 163 states have call successors, (163), 20 states have call predecessors, (163), 18 states have return successors, (161), 144 states have call predecessors, (161), 161 states have call successors, (161) [2022-03-20 15:17:03,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 950 transitions. [2022-03-20 15:17:03,789 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 950 transitions. Word has length 135 [2022-03-20 15:17:03,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:17:03,789 INFO L478 AbstractCegarLoop]: Abstraction has 707 states and 950 transitions. [2022-03-20 15:17:03,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 17 states have internal predecessors, (96), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-20 15:17:03,790 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 950 transitions. [2022-03-20 15:17:03,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-20 15:17:03,791 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:17:03,791 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:17:03,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-20 15:17:04,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:04,007 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:17:04,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:17:04,007 INFO L85 PathProgramCache]: Analyzing trace with hash -972958086, now seen corresponding path program 21 times [2022-03-20 15:17:04,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:04,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [497074689] [2022-03-20 15:17:04,008 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:17:04,008 INFO L85 PathProgramCache]: Analyzing trace with hash -972958086, now seen corresponding path program 22 times [2022-03-20 15:17:04,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:17:04,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386799509] [2022-03-20 15:17:04,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:17:04,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:17:04,013 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:17:04,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318982985] [2022-03-20 15:17:04,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:17:04,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:04,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:17:04,014 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:17:04,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-20 15:17:04,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:17:04,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:17:04,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 15:17:04,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:17:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 47 proven. 112 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2022-03-20 15:17:05,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:17:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 67 proven. 92 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2022-03-20 15:17:07,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:17:07,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386799509] [2022-03-20 15:17:07,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:17:07,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318982985] [2022-03-20 15:17:07,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318982985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:17:07,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:17:07,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-03-20 15:17:07,134 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:17:07,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [497074689] [2022-03-20 15:17:07,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [497074689] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:17:07,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:17:07,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 15:17:07,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804813437] [2022-03-20 15:17:07,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:17:07,135 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 15:17:07,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:07,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 15:17:07,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-03-20 15:17:07,135 INFO L87 Difference]: Start difference. First operand 707 states and 950 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-20 15:17:09,265 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 15:17:09,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:17:09,547 INFO L93 Difference]: Finished difference Result 964 states and 1336 transitions. [2022-03-20 15:17:09,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 15:17:09,547 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) Word has length 137 [2022-03-20 15:17:09,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:17:09,550 INFO L225 Difference]: With dead ends: 964 [2022-03-20 15:17:09,550 INFO L226 Difference]: Without dead ends: 851 [2022-03-20 15:17:09,551 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-03-20 15:17:09,551 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 28 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:17:09,552 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 599 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 1 Unknown, 171 Unchecked, 2.1s Time] [2022-03-20 15:17:09,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-03-20 15:17:09,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 707. [2022-03-20 15:17:09,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 525 states have (on average 1.1923809523809523) internal successors, (626), 542 states have internal predecessors, (626), 163 states have call successors, (163), 20 states have call predecessors, (163), 18 states have return successors, (161), 144 states have call predecessors, (161), 161 states have call successors, (161) [2022-03-20 15:17:09,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 950 transitions. [2022-03-20 15:17:09,755 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 950 transitions. Word has length 137 [2022-03-20 15:17:09,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:17:09,755 INFO L478 AbstractCegarLoop]: Abstraction has 707 states and 950 transitions. [2022-03-20 15:17:09,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-20 15:17:09,755 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 950 transitions. [2022-03-20 15:17:09,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-20 15:17:09,757 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:17:09,757 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:17:09,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-20 15:17:09,971 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:09,971 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:17:09,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:17:09,972 INFO L85 PathProgramCache]: Analyzing trace with hash -134259028, now seen corresponding path program 23 times [2022-03-20 15:17:09,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:09,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [241251360] [2022-03-20 15:17:09,972 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:17:09,972 INFO L85 PathProgramCache]: Analyzing trace with hash -134259028, now seen corresponding path program 24 times [2022-03-20 15:17:09,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:17:09,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549755461] [2022-03-20 15:17:09,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:17:09,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:17:09,978 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:17:09,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186021684] [2022-03-20 15:17:09,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:17:09,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:09,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:17:09,979 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:17:09,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-20 15:17:10,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 15:17:10,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:17:10,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 15:17:10,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:17:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 28 proven. 498 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:17:10,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:17:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-20 15:17:10,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:17:10,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549755461] [2022-03-20 15:17:10,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:17:10,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186021684] [2022-03-20 15:17:10,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186021684] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:17:10,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:17:10,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 24 [2022-03-20 15:17:10,734 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:17:10,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [241251360] [2022-03-20 15:17:10,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [241251360] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:17:10,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:17:10,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 15:17:10,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628306714] [2022-03-20 15:17:10,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:17:10,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 15:17:10,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:10,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 15:17:10,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:17:10,736 INFO L87 Difference]: Start difference. First operand 707 states and 950 transitions. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-20 15:17:11,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:17:11,243 INFO L93 Difference]: Finished difference Result 807 states and 1089 transitions. [2022-03-20 15:17:11,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 15:17:11,244 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 137 [2022-03-20 15:17:11,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:17:11,247 INFO L225 Difference]: With dead ends: 807 [2022-03-20 15:17:11,247 INFO L226 Difference]: Without dead ends: 802 [2022-03-20 15:17:11,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=479, Invalid=781, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 15:17:11,248 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 321 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:17:11,249 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 344 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:17:11,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-03-20 15:17:11,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 775. [2022-03-20 15:17:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 579 states have (on average 1.2037996545768566) internal successors, (697), 596 states have internal predecessors, (697), 176 states have call successors, (176), 21 states have call predecessors, (176), 19 states have return successors, (174), 157 states have call predecessors, (174), 174 states have call successors, (174) [2022-03-20 15:17:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1047 transitions. [2022-03-20 15:17:11,433 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1047 transitions. Word has length 137 [2022-03-20 15:17:11,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:17:11,433 INFO L478 AbstractCegarLoop]: Abstraction has 775 states and 1047 transitions. [2022-03-20 15:17:11,433 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-20 15:17:11,433 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1047 transitions. [2022-03-20 15:17:11,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-20 15:17:11,435 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:17:11,435 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 8, 7, 7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:17:11,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-20 15:17:11,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-20 15:17:11,639 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:17:11,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:17:11,639 INFO L85 PathProgramCache]: Analyzing trace with hash -895861967, now seen corresponding path program 19 times [2022-03-20 15:17:11,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:11,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [86644761] [2022-03-20 15:17:11,640 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:17:11,640 INFO L85 PathProgramCache]: Analyzing trace with hash -895861967, now seen corresponding path program 20 times [2022-03-20 15:17:11,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:17:11,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631778994] [2022-03-20 15:17:11,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:17:11,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:17:11,644 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:17:11,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648096709] [2022-03-20 15:17:11,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:17:11,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:11,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:17:11,645 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:17:11,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-20 15:17:11,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:17:11,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:17:11,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 15:17:11,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:17:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 42 proven. 498 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:17:11,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:17:12,267 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 42 proven. 134 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-20 15:17:12,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:17:12,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631778994] [2022-03-20 15:17:12,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:17:12,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648096709] [2022-03-20 15:17:12,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648096709] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:17:12,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:17:12,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2022-03-20 15:17:12,267 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:17:12,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [86644761] [2022-03-20 15:17:12,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [86644761] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:17:12,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:17:12,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 15:17:12,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783338198] [2022-03-20 15:17:12,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:17:12,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 15:17:12,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:12,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 15:17:12,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:17:12,268 INFO L87 Difference]: Start difference. First operand 775 states and 1047 transitions. Second operand has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 17 states have internal predecessors, (100), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-20 15:17:12,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:17:12,736 INFO L93 Difference]: Finished difference Result 945 states and 1302 transitions. [2022-03-20 15:17:12,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 15:17:12,736 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 17 states have internal predecessors, (100), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 139 [2022-03-20 15:17:12,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:17:12,747 INFO L225 Difference]: With dead ends: 945 [2022-03-20 15:17:12,747 INFO L226 Difference]: Without dead ends: 775 [2022-03-20 15:17:12,748 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=522, Invalid=810, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 15:17:12,748 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 276 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:17:12,748 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 311 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:17:12,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-03-20 15:17:12,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 775. [2022-03-20 15:17:12,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 579 states have (on average 1.1934369602763386) internal successors, (691), 596 states have internal predecessors, (691), 176 states have call successors, (176), 21 states have call predecessors, (176), 19 states have return successors, (174), 157 states have call predecessors, (174), 174 states have call successors, (174) [2022-03-20 15:17:12,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1041 transitions. [2022-03-20 15:17:12,905 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1041 transitions. Word has length 139 [2022-03-20 15:17:12,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:17:12,905 INFO L478 AbstractCegarLoop]: Abstraction has 775 states and 1041 transitions. [2022-03-20 15:17:12,905 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 17 states have internal predecessors, (100), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-20 15:17:12,905 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1041 transitions. [2022-03-20 15:17:12,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-20 15:17:12,907 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:17:12,907 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 7, 7, 7, 7, 6, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:17:12,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-20 15:17:13,122 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-20 15:17:13,123 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:17:13,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:17:13,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1908608861, now seen corresponding path program 25 times [2022-03-20 15:17:13,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:13,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [426007941] [2022-03-20 15:17:13,123 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:17:13,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1908608861, now seen corresponding path program 26 times [2022-03-20 15:17:13,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:17:13,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303694650] [2022-03-20 15:17:13,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:17:13,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:17:13,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:17:13,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299510045] [2022-03-20 15:17:13,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:17:13,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:13,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:17:13,129 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:17:13,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-20 15:17:13,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:17:13,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:17:13,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 15:17:13,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:17:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 36 proven. 566 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:17:13,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:17:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 36 proven. 146 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-20 15:17:13,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:17:13,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303694650] [2022-03-20 15:17:13,785 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:17:13,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299510045] [2022-03-20 15:17:13,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299510045] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:17:13,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:17:13,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 24 [2022-03-20 15:17:13,785 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:17:13,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [426007941] [2022-03-20 15:17:13,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [426007941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:17:13,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:17:13,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 15:17:13,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657361740] [2022-03-20 15:17:13,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:17:13,786 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 15:17:13,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:13,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 15:17:13,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:17:13,786 INFO L87 Difference]: Start difference. First operand 775 states and 1041 transitions. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-20 15:17:14,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:17:14,207 INFO L93 Difference]: Finished difference Result 981 states and 1345 transitions. [2022-03-20 15:17:14,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 15:17:14,208 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 145 [2022-03-20 15:17:14,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:17:14,210 INFO L225 Difference]: With dead ends: 981 [2022-03-20 15:17:14,210 INFO L226 Difference]: Without dead ends: 789 [2022-03-20 15:17:14,211 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=509, Invalid=823, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 15:17:14,211 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 235 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:17:14,211 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 341 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:17:14,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-03-20 15:17:14,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 778. [2022-03-20 15:17:14,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 582 states have (on average 1.1872852233676976) internal successors, (691), 594 states have internal predecessors, (691), 176 states have call successors, (176), 21 states have call predecessors, (176), 19 states have return successors, (174), 162 states have call predecessors, (174), 174 states have call successors, (174) [2022-03-20 15:17:14,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1041 transitions. [2022-03-20 15:17:14,373 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1041 transitions. Word has length 145 [2022-03-20 15:17:14,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:17:14,373 INFO L478 AbstractCegarLoop]: Abstraction has 778 states and 1041 transitions. [2022-03-20 15:17:14,373 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-20 15:17:14,373 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1041 transitions. [2022-03-20 15:17:14,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-20 15:17:14,375 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:17:14,375 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 9, 8, 8, 8, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:17:14,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-20 15:17:14,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-20 15:17:14,587 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:17:14,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:17:14,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1963931820, now seen corresponding path program 21 times [2022-03-20 15:17:14,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:14,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1692170221] [2022-03-20 15:17:14,588 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:17:14,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1963931820, now seen corresponding path program 22 times [2022-03-20 15:17:14,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:17:14,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845866434] [2022-03-20 15:17:14,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:17:14,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:17:14,592 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:17:14,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451217258] [2022-03-20 15:17:14,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:17:14,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:14,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:17:14,594 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:17:14,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-20 15:17:14,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:17:14,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:17:14,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 15:17:14,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:17:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 44 proven. 584 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:17:15,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:17:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 44 proven. 164 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-20 15:17:15,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:17:15,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845866434] [2022-03-20 15:17:15,219 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:17:15,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451217258] [2022-03-20 15:17:15,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451217258] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:17:15,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:17:15,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 24 [2022-03-20 15:17:15,220 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:17:15,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1692170221] [2022-03-20 15:17:15,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1692170221] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:17:15,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:17:15,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 15:17:15,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042079188] [2022-03-20 15:17:15,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:17:15,220 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 15:17:15,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:15,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 15:17:15,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:17:15,221 INFO L87 Difference]: Start difference. First operand 778 states and 1041 transitions. Second operand has 19 states, 19 states have (on average 5.578947368421052) internal successors, (106), 18 states have internal predecessors, (106), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-20 15:17:15,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:17:15,668 INFO L93 Difference]: Finished difference Result 965 states and 1319 transitions. [2022-03-20 15:17:15,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 15:17:15,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.578947368421052) internal successors, (106), 18 states have internal predecessors, (106), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 147 [2022-03-20 15:17:15,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:17:15,672 INFO L225 Difference]: With dead ends: 965 [2022-03-20 15:17:15,672 INFO L226 Difference]: Without dead ends: 795 [2022-03-20 15:17:15,673 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=544, Invalid=862, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 15:17:15,673 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 266 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:17:15,673 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 321 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:17:15,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-03-20 15:17:15,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 795. [2022-03-20 15:17:15,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 599 states have (on average 1.1819699499165275) internal successors, (708), 606 states have internal predecessors, (708), 176 states have call successors, (176), 21 states have call predecessors, (176), 19 states have return successors, (174), 167 states have call predecessors, (174), 174 states have call successors, (174) [2022-03-20 15:17:15,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1058 transitions. [2022-03-20 15:17:15,843 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1058 transitions. Word has length 147 [2022-03-20 15:17:15,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:17:15,843 INFO L478 AbstractCegarLoop]: Abstraction has 795 states and 1058 transitions. [2022-03-20 15:17:15,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.578947368421052) internal successors, (106), 18 states have internal predecessors, (106), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-20 15:17:15,844 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1058 transitions. [2022-03-20 15:17:15,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-20 15:17:15,845 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:17:15,845 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:17:15,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-20 15:17:16,061 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:16,062 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:17:16,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:17:16,062 INFO L85 PathProgramCache]: Analyzing trace with hash -913503479, now seen corresponding path program 15 times [2022-03-20 15:17:16,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:16,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1749443331] [2022-03-20 15:17:16,062 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:17:16,062 INFO L85 PathProgramCache]: Analyzing trace with hash -913503479, now seen corresponding path program 16 times [2022-03-20 15:17:16,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:17:16,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552878414] [2022-03-20 15:17:16,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:17:16,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:17:16,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:17:16,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802312401] [2022-03-20 15:17:16,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:17:16,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:16,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:17:16,069 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:17:16,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-20 15:17:16,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:17:16,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:17:16,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 15:17:16,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:17:16,539 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 32 proven. 642 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:17:16,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:17:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 32 proven. 162 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-20 15:17:16,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:17:16,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552878414] [2022-03-20 15:17:16,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:17:16,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802312401] [2022-03-20 15:17:16,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802312401] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:17:16,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:17:16,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 24 [2022-03-20 15:17:16,819 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:17:16,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1749443331] [2022-03-20 15:17:16,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1749443331] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:17:16,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:17:16,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 15:17:16,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540941486] [2022-03-20 15:17:16,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:17:16,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 15:17:16,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:16,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 15:17:16,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:17:16,820 INFO L87 Difference]: Start difference. First operand 795 states and 1058 transitions. Second operand has 20 states, 20 states have (on average 5.4) internal successors, (108), 19 states have internal predecessors, (108), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-20 15:17:17,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:17:17,384 INFO L93 Difference]: Finished difference Result 846 states and 1128 transitions. [2022-03-20 15:17:17,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 15:17:17,384 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.4) internal successors, (108), 19 states have internal predecessors, (108), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 151 [2022-03-20 15:17:17,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:17:17,387 INFO L225 Difference]: With dead ends: 846 [2022-03-20 15:17:17,387 INFO L226 Difference]: Without dead ends: 841 [2022-03-20 15:17:17,387 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=499, Invalid=833, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 15:17:17,387 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 278 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:17:17,387 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 357 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 15:17:17,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-03-20 15:17:17,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 819. [2022-03-20 15:17:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 609 states have (on average 1.1822660098522169) internal successors, (720), 626 states have internal predecessors, (720), 189 states have call successors, (189), 22 states have call predecessors, (189), 20 states have return successors, (187), 170 states have call predecessors, (187), 187 states have call successors, (187) [2022-03-20 15:17:17,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1096 transitions. [2022-03-20 15:17:17,570 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1096 transitions. Word has length 151 [2022-03-20 15:17:17,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:17:17,570 INFO L478 AbstractCegarLoop]: Abstraction has 819 states and 1096 transitions. [2022-03-20 15:17:17,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.4) internal successors, (108), 19 states have internal predecessors, (108), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-20 15:17:17,570 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1096 transitions. [2022-03-20 15:17:17,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-20 15:17:17,572 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:17:17,572 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 8, 8, 8, 8, 6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:17:17,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-20 15:17:17,788 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-20 15:17:17,788 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:17:17,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:17:17,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1031451968, now seen corresponding path program 27 times [2022-03-20 15:17:17,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:17,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [554249361] [2022-03-20 15:17:17,789 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:17:17,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1031451968, now seen corresponding path program 28 times [2022-03-20 15:17:17,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:17:17,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828168367] [2022-03-20 15:17:17,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:17:17,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:17:17,793 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:17:17,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288458967] [2022-03-20 15:17:17,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:17:17,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:17,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:17:17,810 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:17:17,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-20 15:17:17,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:17:17,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:17:17,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 15:17:17,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:17:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 38 proven. 654 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:17:18,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:17:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 38 proven. 174 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-20 15:17:18,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:17:18,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828168367] [2022-03-20 15:17:18,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:17:18,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288458967] [2022-03-20 15:17:18,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288458967] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:17:18,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:17:18,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 24 [2022-03-20 15:17:18,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:17:18,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [554249361] [2022-03-20 15:17:18,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [554249361] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:17:18,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:17:18,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 15:17:18,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188982948] [2022-03-20 15:17:18,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:17:18,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 15:17:18,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:18,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 15:17:18,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:17:18,407 INFO L87 Difference]: Start difference. First operand 819 states and 1096 transitions. Second operand has 20 states, 20 states have (on average 5.5) internal successors, (110), 19 states have internal predecessors, (110), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-20 15:17:18,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:17:18,921 INFO L93 Difference]: Finished difference Result 1023 states and 1398 transitions. [2022-03-20 15:17:18,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 15:17:18,922 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.5) internal successors, (110), 19 states have internal predecessors, (110), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 153 [2022-03-20 15:17:18,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:17:18,924 INFO L225 Difference]: With dead ends: 1023 [2022-03-20 15:17:18,924 INFO L226 Difference]: Without dead ends: 845 [2022-03-20 15:17:18,925 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 282 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=530, Invalid=876, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 15:17:18,925 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 272 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:17:18,925 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 359 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:17:18,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-03-20 15:17:19,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 834. [2022-03-20 15:17:19,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 624 states have (on average 1.1826923076923077) internal successors, (738), 636 states have internal predecessors, (738), 189 states have call successors, (189), 22 states have call predecessors, (189), 20 states have return successors, (187), 175 states have call predecessors, (187), 187 states have call successors, (187) [2022-03-20 15:17:19,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1114 transitions. [2022-03-20 15:17:19,105 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1114 transitions. Word has length 153 [2022-03-20 15:17:19,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:17:19,106 INFO L478 AbstractCegarLoop]: Abstraction has 834 states and 1114 transitions. [2022-03-20 15:17:19,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.5) internal successors, (110), 19 states have internal predecessors, (110), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-20 15:17:19,106 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1114 transitions. [2022-03-20 15:17:19,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 15:17:19,107 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:17:19,107 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 10, 9, 9, 9, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:17:19,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-20 15:17:19,321 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:19,321 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:17:19,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:17:19,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1196851319, now seen corresponding path program 23 times [2022-03-20 15:17:19,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:19,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [452569743] [2022-03-20 15:17:19,322 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:17:19,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1196851319, now seen corresponding path program 24 times [2022-03-20 15:17:19,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:17:19,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970441755] [2022-03-20 15:17:19,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:17:19,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:17:19,328 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:17:19,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582964496] [2022-03-20 15:17:19,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:17:19,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:19,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:17:19,329 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:17:19,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-20 15:17:19,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 15:17:19,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:17:19,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 15:17:19,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:17:19,889 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 46 proven. 678 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:17:19,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:17:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 46 proven. 198 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-20 15:17:20,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:17:20,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970441755] [2022-03-20 15:17:20,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:17:20,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582964496] [2022-03-20 15:17:20,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582964496] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:17:20,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:17:20,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 24 [2022-03-20 15:17:20,165 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:17:20,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [452569743] [2022-03-20 15:17:20,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [452569743] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:17:20,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:17:20,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 15:17:20,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319334390] [2022-03-20 15:17:20,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:17:20,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 15:17:20,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:20,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 15:17:20,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:17:20,166 INFO L87 Difference]: Start difference. First operand 834 states and 1114 transitions. Second operand has 20 states, 20 states have (on average 5.6) internal successors, (112), 19 states have internal predecessors, (112), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-20 15:17:20,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:17:20,712 INFO L93 Difference]: Finished difference Result 1021 states and 1392 transitions. [2022-03-20 15:17:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 15:17:20,712 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.6) internal successors, (112), 19 states have internal predecessors, (112), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 155 [2022-03-20 15:17:20,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:17:20,715 INFO L225 Difference]: With dead ends: 1021 [2022-03-20 15:17:20,715 INFO L226 Difference]: Without dead ends: 851 [2022-03-20 15:17:20,715 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=566, Invalid=916, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 15:17:20,716 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 267 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:17:20,716 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 368 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:17:20,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-03-20 15:17:20,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 851. [2022-03-20 15:17:20,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 641 states have (on average 1.1778471138845554) internal successors, (755), 648 states have internal predecessors, (755), 189 states have call successors, (189), 22 states have call predecessors, (189), 20 states have return successors, (187), 180 states have call predecessors, (187), 187 states have call successors, (187) [2022-03-20 15:17:20,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1131 transitions. [2022-03-20 15:17:20,893 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1131 transitions. Word has length 155 [2022-03-20 15:17:20,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:17:20,893 INFO L478 AbstractCegarLoop]: Abstraction has 851 states and 1131 transitions. [2022-03-20 15:17:20,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.6) internal successors, (112), 19 states have internal predecessors, (112), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-20 15:17:20,893 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1131 transitions. [2022-03-20 15:17:20,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-20 15:17:20,895 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:17:20,895 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 8, 8, 8, 8, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:17:20,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-20 15:17:21,097 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:21,097 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:17:21,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:17:21,097 INFO L85 PathProgramCache]: Analyzing trace with hash -61113684, now seen corresponding path program 17 times [2022-03-20 15:17:21,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:21,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1124296824] [2022-03-20 15:17:21,098 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:17:21,098 INFO L85 PathProgramCache]: Analyzing trace with hash -61113684, now seen corresponding path program 18 times [2022-03-20 15:17:21,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:17:21,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530941845] [2022-03-20 15:17:21,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:17:21,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:17:21,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:17:21,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66289106] [2022-03-20 15:17:21,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:17:21,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:21,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:17:21,104 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:17:21,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-20 15:17:21,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 15:17:21,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:17:21,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 15:17:21,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:17:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 34 proven. 734 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:17:22,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:17:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 34 proven. 190 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2022-03-20 15:17:22,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:17:22,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530941845] [2022-03-20 15:17:22,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:17:22,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66289106] [2022-03-20 15:17:22,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66289106] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:17:22,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:17:22,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 24 [2022-03-20 15:17:22,392 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:17:22,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1124296824] [2022-03-20 15:17:22,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1124296824] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:17:22,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:17:22,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 15:17:22,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055229670] [2022-03-20 15:17:22,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:17:22,393 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 15:17:22,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:22,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 15:17:22,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:17:22,393 INFO L87 Difference]: Start difference. First operand 851 states and 1131 transitions. Second operand has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 20 states have internal predecessors, (114), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-20 15:17:22,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:17:22,945 INFO L93 Difference]: Finished difference Result 902 states and 1201 transitions. [2022-03-20 15:17:22,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 15:17:22,945 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 20 states have internal predecessors, (114), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 159 [2022-03-20 15:17:22,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:17:22,948 INFO L225 Difference]: With dead ends: 902 [2022-03-20 15:17:22,948 INFO L226 Difference]: Without dead ends: 897 [2022-03-20 15:17:22,948 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=519, Invalid=887, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 15:17:22,948 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 274 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:17:22,948 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 389 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:17:22,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-03-20 15:17:23,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 875. [2022-03-20 15:17:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 651 states have (on average 1.1781874039938556) internal successors, (767), 668 states have internal predecessors, (767), 202 states have call successors, (202), 23 states have call predecessors, (202), 21 states have return successors, (200), 183 states have call predecessors, (200), 200 states have call successors, (200) [2022-03-20 15:17:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1169 transitions. [2022-03-20 15:17:23,137 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1169 transitions. Word has length 159 [2022-03-20 15:17:23,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:17:23,137 INFO L478 AbstractCegarLoop]: Abstraction has 875 states and 1169 transitions. [2022-03-20 15:17:23,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 20 states have internal predecessors, (114), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-20 15:17:23,137 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1169 transitions. [2022-03-20 15:17:23,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-20 15:17:23,139 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:17:23,139 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 9, 9, 9, 9, 6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:17:23,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-20 15:17:23,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:23,344 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:17:23,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:17:23,344 INFO L85 PathProgramCache]: Analyzing trace with hash -160708573, now seen corresponding path program 29 times [2022-03-20 15:17:23,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:23,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1923967564] [2022-03-20 15:17:23,344 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:17:23,344 INFO L85 PathProgramCache]: Analyzing trace with hash -160708573, now seen corresponding path program 30 times [2022-03-20 15:17:23,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:17:23,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336921532] [2022-03-20 15:17:23,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:17:23,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:17:23,349 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:17:23,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1005082944] [2022-03-20 15:17:23,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:17:23,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:23,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:17:23,352 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:17:23,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-20 15:17:24,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 15:17:24,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:17:24,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 15:17:24,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:17:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 40 proven. 750 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:17:24,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:17:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 40 proven. 206 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2022-03-20 15:17:25,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:17:25,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336921532] [2022-03-20 15:17:25,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:17:25,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005082944] [2022-03-20 15:17:25,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005082944] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:17:25,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:17:25,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 24 [2022-03-20 15:17:25,114 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:17:25,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1923967564] [2022-03-20 15:17:25,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1923967564] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:17:25,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:17:25,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 15:17:25,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076989814] [2022-03-20 15:17:25,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:17:25,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 15:17:25,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:25,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 15:17:25,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:17:25,115 INFO L87 Difference]: Start difference. First operand 875 states and 1169 transitions. Second operand has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 20 states have internal predecessors, (116), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-20 15:17:25,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:17:25,653 INFO L93 Difference]: Finished difference Result 1079 states and 1471 transitions. [2022-03-20 15:17:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 15:17:25,679 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 20 states have internal predecessors, (116), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 161 [2022-03-20 15:17:25,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:17:25,682 INFO L225 Difference]: With dead ends: 1079 [2022-03-20 15:17:25,682 INFO L226 Difference]: Without dead ends: 901 [2022-03-20 15:17:25,683 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=551, Invalid=931, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 15:17:25,683 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 306 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:17:25,684 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 366 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:17:25,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-03-20 15:17:25,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 890. [2022-03-20 15:17:25,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 666 states have (on average 1.1786786786786787) internal successors, (785), 678 states have internal predecessors, (785), 202 states have call successors, (202), 23 states have call predecessors, (202), 21 states have return successors, (200), 188 states have call predecessors, (200), 200 states have call successors, (200) [2022-03-20 15:17:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1187 transitions. [2022-03-20 15:17:25,880 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1187 transitions. Word has length 161 [2022-03-20 15:17:25,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:17:25,880 INFO L478 AbstractCegarLoop]: Abstraction has 890 states and 1187 transitions. [2022-03-20 15:17:25,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 20 states have internal predecessors, (116), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-20 15:17:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1187 transitions. [2022-03-20 15:17:25,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-20 15:17:25,882 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:17:25,882 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 8, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:17:25,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-20 15:17:26,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:26,088 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:17:26,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:17:26,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1942329766, now seen corresponding path program 25 times [2022-03-20 15:17:26,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:26,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [201855277] [2022-03-20 15:17:26,089 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:17:26,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1942329766, now seen corresponding path program 26 times [2022-03-20 15:17:26,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:17:26,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450654567] [2022-03-20 15:17:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:17:26,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:17:26,094 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:17:26,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129937683] [2022-03-20 15:17:26,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:17:26,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:26,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:17:26,095 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:17:26,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-20 15:17:26,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:17:26,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:17:26,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 15:17:26,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:17:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 54 proven. 726 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:17:26,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:17:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 54 proven. 182 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2022-03-20 15:17:26,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:17:26,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450654567] [2022-03-20 15:17:26,635 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:17:26,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129937683] [2022-03-20 15:17:26,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129937683] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:17:26,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:17:26,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 24 [2022-03-20 15:17:26,635 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:17:26,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [201855277] [2022-03-20 15:17:26,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [201855277] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:17:26,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:17:26,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 15:17:26,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680157931] [2022-03-20 15:17:26,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:17:26,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 15:17:26,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:26,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 15:17:26,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:17:26,636 INFO L87 Difference]: Start difference. First operand 890 states and 1187 transitions. Second operand has 21 states, 21 states have (on average 5.619047619047619) internal successors, (118), 20 states have internal predecessors, (118), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-20 15:17:27,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:17:27,265 INFO L93 Difference]: Finished difference Result 1077 states and 1465 transitions. [2022-03-20 15:17:27,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 15:17:27,265 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.619047619047619) internal successors, (118), 20 states have internal predecessors, (118), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 163 [2022-03-20 15:17:27,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:17:27,268 INFO L225 Difference]: With dead ends: 1077 [2022-03-20 15:17:27,268 INFO L226 Difference]: Without dead ends: 907 [2022-03-20 15:17:27,268 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=588, Invalid=972, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 15:17:27,269 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 324 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:17:27,269 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 365 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 15:17:27,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-03-20 15:17:27,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 907. [2022-03-20 15:17:27,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 683 states have (on average 1.1742313323572475) internal successors, (802), 690 states have internal predecessors, (802), 202 states have call successors, (202), 23 states have call predecessors, (202), 21 states have return successors, (200), 193 states have call predecessors, (200), 200 states have call successors, (200) [2022-03-20 15:17:27,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1204 transitions. [2022-03-20 15:17:27,499 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1204 transitions. Word has length 163 [2022-03-20 15:17:27,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:17:27,499 INFO L478 AbstractCegarLoop]: Abstraction has 907 states and 1204 transitions. [2022-03-20 15:17:27,499 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.619047619047619) internal successors, (118), 20 states have internal predecessors, (118), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-20 15:17:27,499 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1204 transitions. [2022-03-20 15:17:27,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-20 15:17:27,501 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:17:27,501 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 9, 9, 9, 9, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:17:27,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-20 15:17:27,716 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-20 15:17:27,716 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:17:27,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:17:27,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1797417137, now seen corresponding path program 19 times [2022-03-20 15:17:27,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:27,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1483006019] [2022-03-20 15:17:27,717 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:17:27,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1797417137, now seen corresponding path program 20 times [2022-03-20 15:17:27,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:17:27,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358439634] [2022-03-20 15:17:27,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:17:27,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:17:27,721 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:17:27,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965652530] [2022-03-20 15:17:27,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:17:27,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:27,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:17:27,722 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:17:27,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-20 15:17:27,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:17:27,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:17:27,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 15:17:27,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:17:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 36 proven. 834 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:17:28,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:17:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 36 proven. 222 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-20 15:17:28,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:17:28,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358439634] [2022-03-20 15:17:28,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:17:28,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965652530] [2022-03-20 15:17:28,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965652530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:17:28,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:17:28,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2022-03-20 15:17:28,432 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:17:28,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1483006019] [2022-03-20 15:17:28,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1483006019] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:17:28,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:17:28,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 15:17:28,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715303289] [2022-03-20 15:17:28,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:17:28,432 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 15:17:28,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:28,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 15:17:28,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:17:28,433 INFO L87 Difference]: Start difference. First operand 907 states and 1204 transitions. Second operand has 22 states, 22 states have (on average 5.454545454545454) internal successors, (120), 21 states have internal predecessors, (120), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-20 15:17:29,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:17:29,085 INFO L93 Difference]: Finished difference Result 958 states and 1274 transitions. [2022-03-20 15:17:29,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 15:17:29,085 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.454545454545454) internal successors, (120), 21 states have internal predecessors, (120), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 167 [2022-03-20 15:17:29,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:17:29,088 INFO L225 Difference]: With dead ends: 958 [2022-03-20 15:17:29,088 INFO L226 Difference]: Without dead ends: 953 [2022-03-20 15:17:29,088 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=539, Invalid=943, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 15:17:29,089 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 365 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:17:29,089 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 373 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 15:17:29,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-03-20 15:17:29,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 931. [2022-03-20 15:17:29,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 693 states have (on average 1.1746031746031746) internal successors, (814), 710 states have internal predecessors, (814), 215 states have call successors, (215), 24 states have call predecessors, (215), 22 states have return successors, (213), 196 states have call predecessors, (213), 213 states have call successors, (213) [2022-03-20 15:17:29,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1242 transitions. [2022-03-20 15:17:29,293 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1242 transitions. Word has length 167 [2022-03-20 15:17:29,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:17:29,293 INFO L478 AbstractCegarLoop]: Abstraction has 931 states and 1242 transitions. [2022-03-20 15:17:29,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.454545454545454) internal successors, (120), 21 states have internal predecessors, (120), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-20 15:17:29,293 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1242 transitions. [2022-03-20 15:17:29,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-20 15:17:29,295 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:17:29,295 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 10, 10, 10, 10, 7, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:17:29,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-20 15:17:29,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-20 15:17:29,500 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:17:29,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:17:29,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1993951238, now seen corresponding path program 31 times [2022-03-20 15:17:29,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:29,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [972173467] [2022-03-20 15:17:29,500 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:17:29,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1993951238, now seen corresponding path program 32 times [2022-03-20 15:17:29,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:17:29,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295274433] [2022-03-20 15:17:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:17:29,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:17:29,505 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:17:29,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280079933] [2022-03-20 15:17:29,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:17:29,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:29,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:17:29,506 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:17:29,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-20 15:17:29,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:17:29,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:17:29,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 15:17:29,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:17:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 42 proven. 854 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:17:29,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:17:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 42 proven. 242 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-20 15:17:30,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:17:30,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295274433] [2022-03-20 15:17:30,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:17:30,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280079933] [2022-03-20 15:17:30,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280079933] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:17:30,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:17:30,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2022-03-20 15:17:30,134 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:17:30,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [972173467] [2022-03-20 15:17:30,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [972173467] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:17:30,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:17:30,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 15:17:30,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032344730] [2022-03-20 15:17:30,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:17:30,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 15:17:30,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:30,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 15:17:30,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:17:30,135 INFO L87 Difference]: Start difference. First operand 931 states and 1242 transitions. Second operand has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 21 states have internal predecessors, (122), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-20 15:17:30,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:17:30,643 INFO L93 Difference]: Finished difference Result 1135 states and 1544 transitions. [2022-03-20 15:17:30,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 15:17:30,646 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 21 states have internal predecessors, (122), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 169 [2022-03-20 15:17:30,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:17:30,649 INFO L225 Difference]: With dead ends: 1135 [2022-03-20 15:17:30,649 INFO L226 Difference]: Without dead ends: 957 [2022-03-20 15:17:30,650 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 314 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 15:17:30,650 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 292 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:17:30,650 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 379 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:17:30,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-03-20 15:17:30,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 946. [2022-03-20 15:17:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 708 states have (on average 1.1751412429378532) internal successors, (832), 720 states have internal predecessors, (832), 215 states have call successors, (215), 24 states have call predecessors, (215), 22 states have return successors, (213), 201 states have call predecessors, (213), 213 states have call successors, (213) [2022-03-20 15:17:30,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1260 transitions. [2022-03-20 15:17:30,850 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1260 transitions. Word has length 169 [2022-03-20 15:17:30,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:17:30,850 INFO L478 AbstractCegarLoop]: Abstraction has 946 states and 1260 transitions. [2022-03-20 15:17:30,850 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 21 states have internal predecessors, (122), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-20 15:17:30,850 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1260 transitions. [2022-03-20 15:17:30,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-03-20 15:17:30,852 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:17:30,852 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 9, 8, 8, 8, 7, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:17:30,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-20 15:17:31,068 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-20 15:17:31,068 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:17:31,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:17:31,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1121656631, now seen corresponding path program 27 times [2022-03-20 15:17:31,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:31,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1464026716] [2022-03-20 15:17:31,068 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:17:31,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1121656631, now seen corresponding path program 28 times [2022-03-20 15:17:31,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:17:31,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267500782] [2022-03-20 15:17:31,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:17:31,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:17:31,073 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:17:31,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086490474] [2022-03-20 15:17:31,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:17:31,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:31,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:17:31,075 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:17:31,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-20 15:17:31,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:17:31,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:17:31,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 15:17:31,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:17:31,529 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 56 proven. 824 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:17:31,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:17:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 56 proven. 212 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-20 15:17:31,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:17:31,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267500782] [2022-03-20 15:17:31,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:17:31,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086490474] [2022-03-20 15:17:31,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086490474] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:17:31,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:17:31,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2022-03-20 15:17:31,807 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:17:31,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1464026716] [2022-03-20 15:17:31,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1464026716] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:17:31,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:17:31,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 15:17:31,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456929256] [2022-03-20 15:17:31,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:17:31,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 15:17:31,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:31,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 15:17:31,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:17:31,808 INFO L87 Difference]: Start difference. First operand 946 states and 1260 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 21 states have internal predecessors, (124), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-20 15:17:32,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:17:32,450 INFO L93 Difference]: Finished difference Result 1133 states and 1538 transitions. [2022-03-20 15:17:32,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 15:17:32,451 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 21 states have internal predecessors, (124), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 171 [2022-03-20 15:17:32,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:17:32,463 INFO L225 Difference]: With dead ends: 1133 [2022-03-20 15:17:32,463 INFO L226 Difference]: Without dead ends: 963 [2022-03-20 15:17:32,464 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 318 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=610, Invalid=1030, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 15:17:32,464 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 338 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:17:32,464 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 359 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 15:17:32,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-03-20 15:17:32,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2022-03-20 15:17:32,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 725 states have (on average 1.1710344827586208) internal successors, (849), 732 states have internal predecessors, (849), 215 states have call successors, (215), 24 states have call predecessors, (215), 22 states have return successors, (213), 206 states have call predecessors, (213), 213 states have call successors, (213) [2022-03-20 15:17:32,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1277 transitions. [2022-03-20 15:17:32,680 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1277 transitions. Word has length 171 [2022-03-20 15:17:32,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:17:32,680 INFO L478 AbstractCegarLoop]: Abstraction has 963 states and 1277 transitions. [2022-03-20 15:17:32,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 21 states have internal predecessors, (124), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-20 15:17:32,680 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1277 transitions. [2022-03-20 15:17:32,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-20 15:17:32,682 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:17:32,682 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 10, 10, 10, 10, 7, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:17:32,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-20 15:17:32,896 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:32,896 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:17:32,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:17:32,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1863737586, now seen corresponding path program 21 times [2022-03-20 15:17:32,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:32,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [913254198] [2022-03-20 15:17:32,897 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:17:32,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1863737586, now seen corresponding path program 22 times [2022-03-20 15:17:32,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:17:32,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840016200] [2022-03-20 15:17:32,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:17:32,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:17:32,902 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:17:32,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [692275343] [2022-03-20 15:17:32,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:17:32,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:32,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:17:32,904 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:17:32,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-20 15:17:32,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:17:32,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:17:32,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 15:17:32,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:17:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 38 proven. 942 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:17:33,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:17:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 38 proven. 258 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-03-20 15:17:33,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:17:33,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840016200] [2022-03-20 15:17:33,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:17:33,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692275343] [2022-03-20 15:17:33,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692275343] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:17:33,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:17:33,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2022-03-20 15:17:33,637 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:17:33,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [913254198] [2022-03-20 15:17:33,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [913254198] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:17:33,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:17:33,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 15:17:33,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980800553] [2022-03-20 15:17:33,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:17:33,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 15:17:33,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:33,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 15:17:33,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-03-20 15:17:33,638 INFO L87 Difference]: Start difference. First operand 963 states and 1277 transitions. Second operand has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 22 states have internal predecessors, (126), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-20 15:17:34,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:17:34,281 INFO L93 Difference]: Finished difference Result 1014 states and 1347 transitions. [2022-03-20 15:17:34,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 15:17:34,282 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 22 states have internal predecessors, (126), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 175 [2022-03-20 15:17:34,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:17:34,284 INFO L225 Difference]: With dead ends: 1014 [2022-03-20 15:17:34,284 INFO L226 Difference]: Without dead ends: 1009 [2022-03-20 15:17:34,285 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 327 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=540, Invalid=942, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 15:17:34,285 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 368 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:17:34,285 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 397 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 15:17:34,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-03-20 15:17:34,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 987. [2022-03-20 15:17:34,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 735 states have (on average 1.1714285714285715) internal successors, (861), 752 states have internal predecessors, (861), 228 states have call successors, (228), 25 states have call predecessors, (228), 23 states have return successors, (226), 209 states have call predecessors, (226), 226 states have call successors, (226) [2022-03-20 15:17:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 1315 transitions. [2022-03-20 15:17:34,505 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 1315 transitions. Word has length 175 [2022-03-20 15:17:34,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:17:34,505 INFO L478 AbstractCegarLoop]: Abstraction has 987 states and 1315 transitions. [2022-03-20 15:17:34,505 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 22 states have internal predecessors, (126), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-20 15:17:34,505 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 1315 transitions. [2022-03-20 15:17:34,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-20 15:17:34,507 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:17:34,507 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 9, 9, 9, 9, 7, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:17:34,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-20 15:17:34,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:34,723 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:17:34,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:17:34,723 INFO L85 PathProgramCache]: Analyzing trace with hash -743527641, now seen corresponding path program 33 times [2022-03-20 15:17:34,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:34,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [987883354] [2022-03-20 15:17:34,724 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:17:34,724 INFO L85 PathProgramCache]: Analyzing trace with hash -743527641, now seen corresponding path program 34 times [2022-03-20 15:17:34,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:17:34,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810099183] [2022-03-20 15:17:34,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:17:34,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:17:34,728 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:17:34,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089338445] [2022-03-20 15:17:34,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:17:34,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:34,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:17:34,729 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:17:34,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-20 15:17:34,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:17:34,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:17:34,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 15:17:34,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:17:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 46 proven. 924 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:17:35,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:17:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 46 proven. 240 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-03-20 15:17:35,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:17:35,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810099183] [2022-03-20 15:17:35,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:17:35,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089338445] [2022-03-20 15:17:35,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089338445] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:17:35,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:17:35,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2022-03-20 15:17:35,470 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:17:35,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [987883354] [2022-03-20 15:17:35,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [987883354] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:17:35,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:17:35,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 15:17:35,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142003588] [2022-03-20 15:17:35,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:17:35,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 15:17:35,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:35,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 15:17:35,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-03-20 15:17:35,471 INFO L87 Difference]: Start difference. First operand 987 states and 1315 transitions. Second operand has 23 states, 23 states have (on average 5.565217391304348) internal successors, (128), 22 states have internal predecessors, (128), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-20 15:17:36,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:17:36,096 INFO L93 Difference]: Finished difference Result 1191 states and 1617 transitions. [2022-03-20 15:17:36,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 15:17:36,097 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.565217391304348) internal successors, (128), 22 states have internal predecessors, (128), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 177 [2022-03-20 15:17:36,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:17:36,099 INFO L225 Difference]: With dead ends: 1191 [2022-03-20 15:17:36,099 INFO L226 Difference]: Without dead ends: 1013 [2022-03-20 15:17:36,100 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 331 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=573, Invalid=987, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 15:17:36,100 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 356 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:17:36,100 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 417 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:17:36,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-03-20 15:17:36,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1002. [2022-03-20 15:17:36,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 750 states have (on average 1.172) internal successors, (879), 762 states have internal predecessors, (879), 228 states have call successors, (228), 25 states have call predecessors, (228), 23 states have return successors, (226), 214 states have call predecessors, (226), 226 states have call successors, (226) [2022-03-20 15:17:36,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1333 transitions. [2022-03-20 15:17:36,336 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1333 transitions. Word has length 177 [2022-03-20 15:17:36,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:17:36,336 INFO L478 AbstractCegarLoop]: Abstraction has 1002 states and 1333 transitions. [2022-03-20 15:17:36,336 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.565217391304348) internal successors, (128), 22 states have internal predecessors, (128), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-20 15:17:36,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1333 transitions. [2022-03-20 15:17:36,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-20 15:17:36,338 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:17:36,338 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 10, 9, 9, 9, 7, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:17:36,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-20 15:17:36,542 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:36,543 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:17:36,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:17:36,543 INFO L85 PathProgramCache]: Analyzing trace with hash 2007520492, now seen corresponding path program 29 times [2022-03-20 15:17:36,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:36,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [760247592] [2022-03-20 15:17:36,543 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:17:36,543 INFO L85 PathProgramCache]: Analyzing trace with hash 2007520492, now seen corresponding path program 30 times [2022-03-20 15:17:36,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:17:36,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582833073] [2022-03-20 15:17:36,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:17:36,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:17:36,548 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:17:36,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676449488] [2022-03-20 15:17:36,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:17:36,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:36,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:17:36,549 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:17:36,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-20 15:17:37,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-20 15:17:37,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:17:37,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 15:17:37,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:17:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 58 proven. 930 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:17:37,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:17:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 58 proven. 246 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-03-20 15:17:38,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:17:38,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582833073] [2022-03-20 15:17:38,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:17:38,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676449488] [2022-03-20 15:17:38,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676449488] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:17:38,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:17:38,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2022-03-20 15:17:38,233 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:17:38,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [760247592] [2022-03-20 15:17:38,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [760247592] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:17:38,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:17:38,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 15:17:38,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583517309] [2022-03-20 15:17:38,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:17:38,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 15:17:38,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:38,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 15:17:38,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-03-20 15:17:38,235 INFO L87 Difference]: Start difference. First operand 1002 states and 1333 transitions. Second operand has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 22 states have internal predecessors, (130), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-20 15:17:38,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:17:38,845 INFO L93 Difference]: Finished difference Result 1189 states and 1611 transitions. [2022-03-20 15:17:38,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 15:17:38,846 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 22 states have internal predecessors, (130), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 179 [2022-03-20 15:17:38,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:17:38,848 INFO L225 Difference]: With dead ends: 1189 [2022-03-20 15:17:38,848 INFO L226 Difference]: Without dead ends: 1019 [2022-03-20 15:17:38,849 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 335 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=611, Invalid=1029, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 15:17:38,849 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 361 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:17:38,850 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 402 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:17:38,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2022-03-20 15:17:39,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 1019. [2022-03-20 15:17:39,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 767 states have (on average 1.1681877444589308) internal successors, (896), 774 states have internal predecessors, (896), 228 states have call successors, (228), 25 states have call predecessors, (228), 23 states have return successors, (226), 219 states have call predecessors, (226), 226 states have call successors, (226) [2022-03-20 15:17:39,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1350 transitions. [2022-03-20 15:17:39,099 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1350 transitions. Word has length 179 [2022-03-20 15:17:39,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:17:39,099 INFO L478 AbstractCegarLoop]: Abstraction has 1019 states and 1350 transitions. [2022-03-20 15:17:39,099 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 22 states have internal predecessors, (130), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-20 15:17:39,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1350 transitions. [2022-03-20 15:17:39,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-20 15:17:39,101 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:17:39,101 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 11, 11, 11, 8, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:17:39,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-20 15:17:39,306 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-03-20 15:17:39,306 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:17:39,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:17:39,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1274488939, now seen corresponding path program 23 times [2022-03-20 15:17:39,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:39,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1682553672] [2022-03-20 15:17:39,307 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:17:39,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1274488939, now seen corresponding path program 24 times [2022-03-20 15:17:39,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:17:39,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932838550] [2022-03-20 15:17:39,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:17:39,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:17:39,323 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:17:39,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415978554] [2022-03-20 15:17:39,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:17:39,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:39,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:17:39,327 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:17:39,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-20 15:17:40,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-20 15:17:40,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-20 15:17:40,583 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 15:17:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 15:17:40,852 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 15:17:40,853 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-20 15:17:40,853 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 15:17:40,862 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 15:17:40,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-20 15:17:41,073 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:17:41,075 INFO L719 BasicCegarLoop]: Path program histogram: [34, 30, 24, 8, 8, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2] [2022-03-20 15:17:41,077 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 15:17:41,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:17:41 BoogieIcfgContainer [2022-03-20 15:17:41,097 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 15:17:41,097 INFO L158 Benchmark]: Toolchain (without parser) took 84522.36ms. Allocated memory was 202.4MB in the beginning and 626.0MB in the end (delta: 423.6MB). Free memory was 146.0MB in the beginning and 269.7MB in the end (delta: -123.7MB). Peak memory consumption was 300.2MB. Max. memory is 8.0GB. [2022-03-20 15:17:41,097 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 202.4MB. Free memory is still 162.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 15:17:41,097 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.63ms. Allocated memory was 202.4MB in the beginning and 250.6MB in the end (delta: 48.2MB). Free memory was 145.8MB in the beginning and 218.5MB in the end (delta: -72.8MB). Peak memory consumption was 10.1MB. Max. memory is 8.0GB. [2022-03-20 15:17:41,097 INFO L158 Benchmark]: Boogie Preprocessor took 22.21ms. Allocated memory is still 250.6MB. Free memory was 218.5MB in the beginning and 217.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 15:17:41,097 INFO L158 Benchmark]: RCFGBuilder took 227.93ms. Allocated memory is still 250.6MB. Free memory was 217.0MB in the beginning and 206.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 15:17:41,098 INFO L158 Benchmark]: TraceAbstraction took 84046.13ms. Allocated memory was 250.6MB in the beginning and 626.0MB in the end (delta: 375.4MB). Free memory was 205.4MB in the beginning and 269.7MB in the end (delta: -64.3MB). Peak memory consumption was 312.2MB. Max. memory is 8.0GB. [2022-03-20 15:17:41,098 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 202.4MB. Free memory is still 162.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 222.63ms. Allocated memory was 202.4MB in the beginning and 250.6MB in the end (delta: 48.2MB). Free memory was 145.8MB in the beginning and 218.5MB in the end (delta: -72.8MB). Peak memory consumption was 10.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.21ms. Allocated memory is still 250.6MB. Free memory was 218.5MB in the beginning and 217.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 227.93ms. Allocated memory is still 250.6MB. Free memory was 217.0MB in the beginning and 206.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 84046.13ms. Allocated memory was 250.6MB in the beginning and 626.0MB in the end (delta: 375.4MB). Free memory was 205.4MB in the beginning and 269.7MB in the end (delta: -64.3MB). Peak memory consumption was 312.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) [L27] CALL assume_abort_if_not(A % 2 == 1) [L9] COND FALSE !(!cond) [L27] RET assume_abort_if_not(A % 2 == 1) [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND TRUE !(r > 0) [L47] EXPR counter++ [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 [L47] EXPR counter++ [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND TRUE !(r < 0) [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND TRUE !(r > 0) [L47] EXPR counter++ [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 [L47] EXPR counter++ [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND TRUE !(r < 0) [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND TRUE !(r > 0) [L47] EXPR counter++ [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 [L47] EXPR counter++ [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND TRUE !(r < 0) [L34] EXPR counter++ [L34] COND FALSE !(counter++<20) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 84.0s, OverallIterations: 64, TraceHistogramMax: 21, PathProgramHistogramMax: 34, EmptinessCheckTime: 0.1s, AutomataDifference: 24.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 8961 SdHoareTripleChecker+Valid, 14.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8938 mSDsluCounter, 16058 SdHoareTripleChecker+Invalid, 12.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 171 IncrementalHoareTripleChecker+Unchecked, 12173 mSDsCounter, 7610 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8313 IncrementalHoareTripleChecker+Invalid, 16096 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7610 mSolverCounterUnsat, 3885 mSDtfsCounter, 8313 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 12935 GetRequests, 11415 SyntacticMatches, 33 SemanticMatches, 1487 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3975 ImplicationChecksByTransitivity, 12.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1019occurred in iteration=63, InterpolantAutomatonStates: 1260, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.0s AutomataMinimizationTime, 63 MinimizatonAttempts, 871 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-20 15:17:41,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...