/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 21:06:00,595 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 21:06:00,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 21:06:00,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 21:06:00,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 21:06:00,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 21:06:00,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 21:06:00,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 21:06:00,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 21:06:00,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 21:06:00,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 21:06:00,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 21:06:00,624 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 21:06:00,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 21:06:00,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 21:06:00,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 21:06:00,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 21:06:00,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 21:06:00,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 21:06:00,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 21:06:00,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 21:06:00,659 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 21:06:00,665 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 21:06:00,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 21:06:00,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 21:06:00,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 21:06:00,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 21:06:00,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 21:06:00,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 21:06:00,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 21:06:00,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 21:06:00,666 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 21:06:00,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 21:06:00,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 21:06:00,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 21:06:00,667 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 21:06:00,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 21:06:00,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 21:06:00,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 21:06:00,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 21:06:00,668 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 21:06:00,668 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 21:06:00,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 21:06:00,668 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 21:06:00,668 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 21:06:00,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 21:06:00,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 21:06:00,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 21:06:00,874 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 21:06:00,878 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 21:06:00,879 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2022-03-20 21:06:00,926 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/742ebc3a4/6337acc1a759432abe242da3cec7a0df/FLAG1e8de97e9 [2022-03-20 21:06:01,243 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 21:06:01,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2022-03-20 21:06:01,247 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/742ebc3a4/6337acc1a759432abe242da3cec7a0df/FLAG1e8de97e9 [2022-03-20 21:06:01,665 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/742ebc3a4/6337acc1a759432abe242da3cec7a0df [2022-03-20 21:06:01,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 21:06:01,667 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 21:06:01,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 21:06:01,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 21:06:01,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 21:06:01,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:06:01" (1/1) ... [2022-03-20 21:06:01,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe4a65c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:06:01, skipping insertion in model container [2022-03-20 21:06:01,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:06:01" (1/1) ... [2022-03-20 21:06:01,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 21:06:01,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 21:06:01,792 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_unwindbound50.c[535,548] [2022-03-20 21:06:01,828 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 21:06:01,839 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 21:06:01,850 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_unwindbound50.c[535,548] [2022-03-20 21:06:01,875 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 21:06:01,889 INFO L208 MainTranslator]: Completed translation [2022-03-20 21:06:01,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:06:01 WrapperNode [2022-03-20 21:06:01,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 21:06:01,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 21:06:01,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 21:06:01,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 21:06:01,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:06:01" (1/1) ... [2022-03-20 21:06:01,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:06:01" (1/1) ... [2022-03-20 21:06:01,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:06:01" (1/1) ... [2022-03-20 21:06:01,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:06:01" (1/1) ... [2022-03-20 21:06:01,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:06:01" (1/1) ... [2022-03-20 21:06:01,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:06:01" (1/1) ... [2022-03-20 21:06:01,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:06:01" (1/1) ... [2022-03-20 21:06:01,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 21:06:01,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 21:06:01,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 21:06:01,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 21:06:01,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:06:01" (1/1) ... [2022-03-20 21:06:01,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 21:06:01,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:01,978 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 21:06:01,994 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 21:06:02,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 21:06:02,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 21:06:02,004 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 21:06:02,005 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 21:06:02,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 21:06:02,005 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 21:06:02,005 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 21:06:02,005 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 21:06:02,005 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 21:06:02,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 21:06:02,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 21:06:02,006 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 21:06:02,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 21:06:02,006 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 21:06:02,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 21:06:02,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 21:06:02,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 21:06:02,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 21:06:02,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 21:06:02,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 21:06:02,050 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 21:06:02,051 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 21:06:02,150 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 21:06:02,154 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 21:06:02,154 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 21:06:02,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:06:02 BoogieIcfgContainer [2022-03-20 21:06:02,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 21:06:02,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 21:06:02,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 21:06:02,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 21:06:02,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 09:06:01" (1/3) ... [2022-03-20 21:06:02,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c6d1e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:06:02, skipping insertion in model container [2022-03-20 21:06:02,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:06:01" (2/3) ... [2022-03-20 21:06:02,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c6d1e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:06:02, skipping insertion in model container [2022-03-20 21:06:02,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:06:02" (3/3) ... [2022-03-20 21:06:02,160 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound50.c [2022-03-20 21:06:02,163 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 21:06:02,163 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 21:06:02,190 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 21:06:02,194 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 21:06:02,194 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 21:06:02,205 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 21:06:02,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 21:06:02,213 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:02,213 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 21:06:02,214 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:02,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:02,217 INFO L85 PathProgramCache]: Analyzing trace with hash 928708300, now seen corresponding path program 1 times [2022-03-20 21:06:02,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:02,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [169443061] [2022-03-20 21:06:02,229 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:02,229 INFO L85 PathProgramCache]: Analyzing trace with hash 928708300, now seen corresponding path program 2 times [2022-03-20 21:06:02,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:02,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460791281] [2022-03-20 21:06:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:02,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:02,295 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:02,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305735744] [2022-03-20 21:06:02,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:02,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:02,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:02,297 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 21:06:02,298 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 21:06:02,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 21:06:02,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:02,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 1 conjunts are in the unsatisfiable core [2022-03-20 21:06:02,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:02,397 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 21:06:02,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:06:02,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:02,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460791281] [2022-03-20 21:06:02,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:02,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305735744] [2022-03-20 21:06:02,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305735744] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:02,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:02,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-20 21:06:02,400 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:02,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [169443061] [2022-03-20 21:06:02,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [169443061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:02,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:02,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-20 21:06:02,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301446551] [2022-03-20 21:06:02,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:02,404 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-03-20 21:06:02,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:02,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-03-20 21:06:02,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-20 21:06:02,423 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 21:06:02,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:02,442 INFO L93 Difference]: Finished difference Result 67 states and 100 transitions. [2022-03-20 21:06:02,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-03-20 21:06:02,444 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 21:06:02,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:02,448 INFO L225 Difference]: With dead ends: 67 [2022-03-20 21:06:02,448 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 21:06:02,451 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 21:06:02,453 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 21:06:02,453 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 21:06:02,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 21:06:02,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 21:06:02,475 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 21:06:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-20 21:06:02,477 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2022-03-20 21:06:02,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:02,477 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-20 21:06:02,477 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 21:06:02,477 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-20 21:06:02,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 21:06:02,478 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:02,478 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 21:06:02,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 21:06:02,691 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 21:06:02,692 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:02,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:02,693 INFO L85 PathProgramCache]: Analyzing trace with hash -155606603, now seen corresponding path program 1 times [2022-03-20 21:06:02,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:02,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1738555783] [2022-03-20 21:06:02,694 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:02,694 INFO L85 PathProgramCache]: Analyzing trace with hash -155606603, now seen corresponding path program 2 times [2022-03-20 21:06:02,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:02,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107160589] [2022-03-20 21:06:02,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:02,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:02,705 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:02,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817906035] [2022-03-20 21:06:02,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:02,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:02,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:02,707 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 21:06:02,723 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 21:06:02,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 21:06:02,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:02,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 21:06:02,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:02,829 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 21:06:02,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:06:02,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:02,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107160589] [2022-03-20 21:06:02,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:02,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817906035] [2022-03-20 21:06:02,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817906035] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:02,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:02,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 21:06:02,831 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:02,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1738555783] [2022-03-20 21:06:02,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1738555783] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:02,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:02,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 21:06:02,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632494386] [2022-03-20 21:06:02,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:02,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 21:06:02,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:02,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 21:06:02,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 21:06:02,833 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 21:06:02,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:02,845 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-03-20 21:06:02,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 21:06:02,846 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 21:06:02,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:02,847 INFO L225 Difference]: With dead ends: 41 [2022-03-20 21:06:02,847 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 21:06:02,847 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 21:06:02,848 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 21:06:02,848 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 21:06:02,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 21:06:02,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-20 21:06:02,853 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 21:06:02,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-03-20 21:06:02,854 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2022-03-20 21:06:02,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:02,855 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-03-20 21:06:02,855 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 21:06:02,855 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-03-20 21:06:02,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 21:06:02,856 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:02,856 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 21:06:02,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 21:06:03,074 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 21:06:03,075 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:03,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:03,076 INFO L85 PathProgramCache]: Analyzing trace with hash -153938307, now seen corresponding path program 1 times [2022-03-20 21:06:03,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:03,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [75596158] [2022-03-20 21:06:03,076 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:03,077 INFO L85 PathProgramCache]: Analyzing trace with hash -153938307, now seen corresponding path program 2 times [2022-03-20 21:06:03,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:03,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653843259] [2022-03-20 21:06:03,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:03,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:03,088 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:03,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032430434] [2022-03-20 21:06:03,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:03,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:03,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:03,090 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 21:06:03,107 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 21:06:03,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 21:06:03,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:03,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 21:06:03,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:03,350 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 21:06:03,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:06:03,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:03,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653843259] [2022-03-20 21:06:03,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:03,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032430434] [2022-03-20 21:06:03,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032430434] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:03,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:03,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:06:03,351 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:03,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [75596158] [2022-03-20 21:06:03,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [75596158] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:03,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:03,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:06:03,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828317476] [2022-03-20 21:06:03,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:03,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 21:06:03,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:03,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 21:06:03,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 21:06:03,353 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 21:06:05,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:06:07,897 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 21:06:07,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:07,907 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-03-20 21:06:07,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 21:06:07,908 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 21:06:07,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:07,909 INFO L225 Difference]: With dead ends: 53 [2022-03-20 21:06:07,909 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 21:06:07,909 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 21:06:07,910 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s 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, 4.5s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:07,910 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 126 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-03-20 21:06:07,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 21:06:07,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-20 21:06:07,924 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 21:06:07,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2022-03-20 21:06:07,925 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2022-03-20 21:06:07,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:07,925 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2022-03-20 21:06:07,926 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 21:06:07,926 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2022-03-20 21:06:07,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 21:06:07,926 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:07,926 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 21:06:07,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-20 21:06:08,127 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 21:06:08,127 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:08,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:08,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1676885497, now seen corresponding path program 1 times [2022-03-20 21:06:08,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:08,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1849054870] [2022-03-20 21:06:08,129 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:08,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1676885497, now seen corresponding path program 2 times [2022-03-20 21:06:08,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:08,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450506011] [2022-03-20 21:06:08,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:08,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:08,144 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:08,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399169773] [2022-03-20 21:06:08,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:08,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:08,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:08,149 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 21:06:08,150 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 21:06:08,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:08,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:08,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 21:06:08,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:08,289 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 21:06:08,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:08,408 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 21:06:08,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:08,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450506011] [2022-03-20 21:06:08,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:08,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399169773] [2022-03-20 21:06:08,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399169773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:08,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:08,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 21:06:08,410 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:08,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1849054870] [2022-03-20 21:06:08,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1849054870] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:08,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:08,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 21:06:08,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489212980] [2022-03-20 21:06:08,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:08,410 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 21:06:08,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:08,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 21:06:08,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 21:06:08,411 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 21:06:08,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:08,491 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-03-20 21:06:08,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 21:06:08,492 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 21:06:08,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:08,493 INFO L225 Difference]: With dead ends: 57 [2022-03-20 21:06:08,493 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 21:06:08,493 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 21:06:08,494 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 21:06:08,494 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 21:06:08,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 21:06:08,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2022-03-20 21:06:08,501 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 21:06:08,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-03-20 21:06:08,502 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 29 [2022-03-20 21:06:08,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:08,502 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-03-20 21:06:08,503 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 21:06:08,503 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-03-20 21:06:08,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 21:06:08,503 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:08,503 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 21:06:08,526 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 21:06:08,735 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 21:06:08,735 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:08,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:08,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1154059858, now seen corresponding path program 1 times [2022-03-20 21:06:08,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:08,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1216278320] [2022-03-20 21:06:08,737 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:08,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1154059858, now seen corresponding path program 2 times [2022-03-20 21:06:08,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:08,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136962588] [2022-03-20 21:06:08,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:08,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:08,750 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:08,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998339868] [2022-03-20 21:06:08,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:08,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:08,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:08,766 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:06:08,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 21:06:08,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:08,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:08,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 21:06:08,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:09,027 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 21:06:09,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:06:09,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:09,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136962588] [2022-03-20 21:06:09,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:09,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998339868] [2022-03-20 21:06:09,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998339868] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:09,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:09,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:06:09,029 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:09,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1216278320] [2022-03-20 21:06:09,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1216278320] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:09,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:09,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:06:09,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986331758] [2022-03-20 21:06:09,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:09,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 21:06:09,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:09,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 21:06:09,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 21:06:09,031 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 21:06:09,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:09,062 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2022-03-20 21:06:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 21:06:09,062 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 21:06:09,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:09,063 INFO L225 Difference]: With dead ends: 65 [2022-03-20 21:06:09,063 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 21:06:09,064 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 21:06:09,064 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 21:06:09,065 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 21:06:09,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 21:06:09,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-20 21:06:09,075 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 21:06:09,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-03-20 21:06:09,076 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 35 [2022-03-20 21:06:09,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:09,076 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-03-20 21:06:09,076 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 21:06:09,076 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-03-20 21:06:09,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 21:06:09,077 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:09,077 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 21:06:09,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 21:06:09,295 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 21:06:09,296 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:09,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:09,296 INFO L85 PathProgramCache]: Analyzing trace with hash -174895632, now seen corresponding path program 1 times [2022-03-20 21:06:09,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:09,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1315357991] [2022-03-20 21:06:09,297 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:09,297 INFO L85 PathProgramCache]: Analyzing trace with hash -174895632, now seen corresponding path program 2 times [2022-03-20 21:06:09,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:09,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318708377] [2022-03-20 21:06:09,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:09,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:09,306 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:09,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301529815] [2022-03-20 21:06:09,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:09,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:09,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:09,317 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 21:06:09,318 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 21:06:09,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:09,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:09,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 21:06:09,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:09,441 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 21:06:09,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:09,534 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 21:06:09,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:09,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318708377] [2022-03-20 21:06:09,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:09,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301529815] [2022-03-20 21:06:09,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301529815] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 21:06:09,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:06:09,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-03-20 21:06:09,535 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:09,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1315357991] [2022-03-20 21:06:09,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1315357991] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:09,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:09,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 21:06:09,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894469787] [2022-03-20 21:06:09,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:09,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 21:06:09,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:09,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 21:06:09,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 21:06:09,536 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 21:06:09,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:09,575 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-03-20 21:06:09,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 21:06:09,576 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 21:06:09,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:09,576 INFO L225 Difference]: With dead ends: 74 [2022-03-20 21:06:09,576 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 21:06:09,577 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 21:06:09,577 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 21:06:09,577 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 21:06:09,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 21:06:09,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-03-20 21:06:09,586 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 21:06:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-03-20 21:06:09,586 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 41 [2022-03-20 21:06:09,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:09,586 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-03-20 21:06:09,586 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 21:06:09,587 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-03-20 21:06:09,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 21:06:09,587 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:09,587 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 21:06:09,609 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 21:06:09,803 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 21:06:09,803 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:09,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:09,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1292932747, now seen corresponding path program 1 times [2022-03-20 21:06:09,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:09,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [244644726] [2022-03-20 21:06:09,804 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:09,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1292932747, now seen corresponding path program 2 times [2022-03-20 21:06:09,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:09,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603130779] [2022-03-20 21:06:09,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:09,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:09,812 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:09,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065670356] [2022-03-20 21:06:09,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:09,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:09,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:09,813 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 21:06:09,814 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 21:06:09,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:09,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:09,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 21:06:09,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:09,934 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 21:06:09,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:10,013 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 21:06:10,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:10,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603130779] [2022-03-20 21:06:10,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:10,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065670356] [2022-03-20 21:06:10,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065670356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:10,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:10,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 21:06:10,014 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:10,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [244644726] [2022-03-20 21:06:10,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [244644726] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:10,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:10,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 21:06:10,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709616577] [2022-03-20 21:06:10,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:10,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 21:06:10,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:10,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 21:06:10,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 21:06:10,015 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 21:06:10,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:10,060 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-03-20 21:06:10,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 21:06:10,060 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 21:06:10,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:10,061 INFO L225 Difference]: With dead ends: 75 [2022-03-20 21:06:10,061 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 21:06:10,061 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 21:06:10,061 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 21:06:10,062 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 21:06:10,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 21:06:10,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-20 21:06:10,070 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 21:06:10,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-03-20 21:06:10,070 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 43 [2022-03-20 21:06:10,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:10,071 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-03-20 21:06:10,071 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 21:06:10,071 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-03-20 21:06:10,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 21:06:10,072 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:10,072 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 21:06:10,112 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 21:06:10,287 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 21:06:10,288 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:10,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:10,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1407897436, now seen corresponding path program 1 times [2022-03-20 21:06:10,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:10,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1725647248] [2022-03-20 21:06:10,289 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:10,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1407897436, now seen corresponding path program 2 times [2022-03-20 21:06:10,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:10,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34741995] [2022-03-20 21:06:10,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:10,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:10,295 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:10,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021994432] [2022-03-20 21:06:10,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:10,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:10,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:10,296 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 21:06:10,319 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 21:06:10,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:10,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:10,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 21:06:10,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:10,413 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 21:06:10,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:06:10,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:10,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34741995] [2022-03-20 21:06:10,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:10,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021994432] [2022-03-20 21:06:10,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021994432] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:10,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:10,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 21:06:10,414 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:10,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1725647248] [2022-03-20 21:06:10,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1725647248] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:10,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:10,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 21:06:10,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097456382] [2022-03-20 21:06:10,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:10,415 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 21:06:10,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:10,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 21:06:10,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-20 21:06:10,416 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 21:06:10,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:10,450 INFO L93 Difference]: Finished difference Result 101 states and 131 transitions. [2022-03-20 21:06:10,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 21:06:10,450 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 21:06:10,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:10,452 INFO L225 Difference]: With dead ends: 101 [2022-03-20 21:06:10,452 INFO L226 Difference]: Without dead ends: 80 [2022-03-20 21:06:10,452 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 21:06:10,453 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 21:06:10,453 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 21:06:10,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-20 21:06:10,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2022-03-20 21:06:10,476 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 21:06:10,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2022-03-20 21:06:10,478 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 47 [2022-03-20 21:06:10,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:10,479 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2022-03-20 21:06:10,479 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 21:06:10,479 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2022-03-20 21:06:10,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 21:06:10,482 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:10,482 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 21:06:10,498 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 21:06:10,697 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 21:06:10,697 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:10,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:10,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1915058849, now seen corresponding path program 1 times [2022-03-20 21:06:10,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:10,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1043440944] [2022-03-20 21:06:10,698 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:10,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1915058849, now seen corresponding path program 2 times [2022-03-20 21:06:10,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:10,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440085742] [2022-03-20 21:06:10,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:10,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:10,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:10,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732587577] [2022-03-20 21:06:10,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:10,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:10,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:10,709 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 21:06:10,710 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 21:06:10,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:10,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:10,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 21:06:10,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:10,845 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 21:06:10,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:10,941 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 21:06:10,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:10,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440085742] [2022-03-20 21:06:10,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:10,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732587577] [2022-03-20 21:06:10,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732587577] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:10,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:10,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 21:06:10,943 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:10,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1043440944] [2022-03-20 21:06:10,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1043440944] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:10,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:10,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 21:06:10,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192169056] [2022-03-20 21:06:10,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:10,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 21:06:10,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:10,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 21:06:10,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-20 21:06:10,945 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 21:06:10,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:10,998 INFO L93 Difference]: Finished difference Result 118 states and 153 transitions. [2022-03-20 21:06:10,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 21:06:10,998 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 21:06:10,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:11,000 INFO L225 Difference]: With dead ends: 118 [2022-03-20 21:06:11,000 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 21:06:11,002 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 21:06:11,004 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 21:06:11,004 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 21:06:11,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 21:06:11,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-03-20 21:06:11,026 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 21:06:11,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2022-03-20 21:06:11,028 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 49 [2022-03-20 21:06:11,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:11,028 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2022-03-20 21:06:11,028 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 21:06:11,028 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2022-03-20 21:06:11,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 21:06:11,029 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:11,030 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 21:06:11,059 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 21:06:11,260 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 21:06:11,260 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:11,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:11,262 INFO L85 PathProgramCache]: Analyzing trace with hash -60460648, now seen corresponding path program 3 times [2022-03-20 21:06:11,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:11,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [392190348] [2022-03-20 21:06:11,262 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:11,262 INFO L85 PathProgramCache]: Analyzing trace with hash -60460648, now seen corresponding path program 4 times [2022-03-20 21:06:11,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:11,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237071216] [2022-03-20 21:06:11,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:11,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:11,288 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:11,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297675660] [2022-03-20 21:06:11,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:06:11,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:11,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:11,293 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 21:06:11,317 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 21:06:11,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:06:11,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:11,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 21:06:11,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:11,448 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 21:06:11,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:11,543 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 21:06:11,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:11,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237071216] [2022-03-20 21:06:11,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:11,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297675660] [2022-03-20 21:06:11,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297675660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:11,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:11,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 21:06:11,545 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:11,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [392190348] [2022-03-20 21:06:11,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [392190348] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:11,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:11,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 21:06:11,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324374419] [2022-03-20 21:06:11,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:11,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 21:06:11,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:11,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 21:06:11,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-20 21:06:11,546 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 21:06:11,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:11,596 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2022-03-20 21:06:11,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 21:06:11,596 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 21:06:11,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:11,597 INFO L225 Difference]: With dead ends: 119 [2022-03-20 21:06:11,597 INFO L226 Difference]: Without dead ends: 82 [2022-03-20 21:06:11,597 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2022-03-20 21:06:11,598 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 21:06:11,599 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 21:06:11,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-20 21:06:11,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-03-20 21:06:11,613 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 21:06:11,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-03-20 21:06:11,614 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 51 [2022-03-20 21:06:11,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:11,615 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-03-20 21:06:11,615 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 21:06:11,615 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-03-20 21:06:11,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 21:06:11,636 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:11,636 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 21:06:11,654 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 21:06:11,847 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 21:06:11,847 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:11,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:11,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1067781299, now seen corresponding path program 1 times [2022-03-20 21:06:11,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:11,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [932913829] [2022-03-20 21:06:11,848 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:11,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1067781299, now seen corresponding path program 2 times [2022-03-20 21:06:11,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:11,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270965093] [2022-03-20 21:06:11,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:11,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:11,854 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:11,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112588475] [2022-03-20 21:06:11,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:11,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:11,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:11,855 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 21:06:11,856 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 21:06:11,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:11,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:11,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 21:06:11,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:12,033 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 21:06:12,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:12,179 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 21:06:12,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:12,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270965093] [2022-03-20 21:06:12,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:12,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112588475] [2022-03-20 21:06:12,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112588475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:12,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:12,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 21:06:12,180 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:12,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [932913829] [2022-03-20 21:06:12,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [932913829] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:12,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:12,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 21:06:12,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765303741] [2022-03-20 21:06:12,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:12,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 21:06:12,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:12,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 21:06:12,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 21:06:12,181 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 21:06:12,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:12,241 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2022-03-20 21:06:12,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 21:06:12,241 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 21:06:12,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:12,241 INFO L225 Difference]: With dead ends: 99 [2022-03-20 21:06:12,242 INFO L226 Difference]: Without dead ends: 94 [2022-03-20 21:06:12,242 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 21:06:12,242 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 21:06:12,242 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 21:06:12,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-20 21:06:12,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2022-03-20 21:06:12,253 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 21:06:12,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2022-03-20 21:06:12,254 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 55 [2022-03-20 21:06:12,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:12,254 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2022-03-20 21:06:12,254 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 21:06:12,254 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2022-03-20 21:06:12,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 21:06:12,254 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:12,255 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 21:06:12,273 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 21:06:12,470 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 21:06:12,470 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:12,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:12,471 INFO L85 PathProgramCache]: Analyzing trace with hash -2095290798, now seen corresponding path program 3 times [2022-03-20 21:06:12,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:12,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1885167471] [2022-03-20 21:06:12,471 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:12,471 INFO L85 PathProgramCache]: Analyzing trace with hash -2095290798, now seen corresponding path program 4 times [2022-03-20 21:06:12,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:12,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321516213] [2022-03-20 21:06:12,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:12,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:12,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:12,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889846719] [2022-03-20 21:06:12,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:06:12,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:12,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:12,478 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 21:06:12,479 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 21:06:12,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:06:12,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:12,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 21:06:12,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:12,680 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 21:06:12,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:12,812 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 21:06:12,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:12,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321516213] [2022-03-20 21:06:12,812 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:12,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889846719] [2022-03-20 21:06:12,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889846719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:12,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:12,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 21:06:12,813 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:12,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1885167471] [2022-03-20 21:06:12,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1885167471] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:12,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:12,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 21:06:12,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331481857] [2022-03-20 21:06:12,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:12,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 21:06:12,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:12,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 21:06:12,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 21:06:12,814 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 21:06:12,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:12,872 INFO L93 Difference]: Finished difference Result 132 states and 170 transitions. [2022-03-20 21:06:12,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 21:06:12,872 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 21:06:12,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:12,873 INFO L225 Difference]: With dead ends: 132 [2022-03-20 21:06:12,873 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 21:06:12,873 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 21:06:12,873 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 21:06:12,874 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 21:06:12,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 21:06:12,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-03-20 21:06:12,884 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 21:06:12,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2022-03-20 21:06:12,885 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 57 [2022-03-20 21:06:12,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:12,885 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2022-03-20 21:06:12,885 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 21:06:12,885 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2022-03-20 21:06:12,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 21:06:12,885 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:12,886 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 21:06:12,903 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 21:06:13,103 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 21:06:13,104 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:13,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:13,104 INFO L85 PathProgramCache]: Analyzing trace with hash -659642693, now seen corresponding path program 5 times [2022-03-20 21:06:13,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:13,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [173776917] [2022-03-20 21:06:13,104 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:13,105 INFO L85 PathProgramCache]: Analyzing trace with hash -659642693, now seen corresponding path program 6 times [2022-03-20 21:06:13,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:13,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984921358] [2022-03-20 21:06:13,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:13,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:13,113 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:13,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21770976] [2022-03-20 21:06:13,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:06:13,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:13,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:13,114 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 21:06:13,115 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 21:06:13,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 21:06:13,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:13,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 21:06:13,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:13,293 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 21:06:13,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:13,410 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 21:06:13,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:13,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984921358] [2022-03-20 21:06:13,411 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:13,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21770976] [2022-03-20 21:06:13,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21770976] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:13,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:13,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 21:06:13,420 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:13,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [173776917] [2022-03-20 21:06:13,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [173776917] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:13,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:13,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 21:06:13,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920844996] [2022-03-20 21:06:13,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:13,420 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 21:06:13,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:13,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 21:06:13,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 21:06:13,421 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 21:06:13,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:13,495 INFO L93 Difference]: Finished difference Result 133 states and 171 transitions. [2022-03-20 21:06:13,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 21:06:13,495 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 21:06:13,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:13,496 INFO L225 Difference]: With dead ends: 133 [2022-03-20 21:06:13,496 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 21:06:13,496 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 21:06:13,497 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:13,497 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 138 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:06:13,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 21:06:13,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-03-20 21:06:13,508 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 21:06:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2022-03-20 21:06:13,508 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 59 [2022-03-20 21:06:13,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:13,509 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2022-03-20 21:06:13,509 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 21:06:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2022-03-20 21:06:13,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 21:06:13,509 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:13,509 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 21:06:13,515 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 21:06:13,713 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 21:06:13,714 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:13,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:13,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1402694082, now seen corresponding path program 3 times [2022-03-20 21:06:13,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:13,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [646847946] [2022-03-20 21:06:13,714 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:13,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1402694082, now seen corresponding path program 4 times [2022-03-20 21:06:13,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:13,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818508845] [2022-03-20 21:06:13,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:13,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:13,720 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:13,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865659967] [2022-03-20 21:06:13,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:06:13,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:13,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:13,721 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 21:06:13,745 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 21:06:13,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:06:13,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:13,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 21:06:13,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:13,918 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 21:06:13,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:14,072 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 21:06:14,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:14,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818508845] [2022-03-20 21:06:14,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:14,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865659967] [2022-03-20 21:06:14,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865659967] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:14,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:14,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-20 21:06:14,073 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:14,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [646847946] [2022-03-20 21:06:14,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [646847946] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:14,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:14,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 21:06:14,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606394282] [2022-03-20 21:06:14,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:14,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 21:06:14,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:14,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 21:06:14,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-20 21:06:14,074 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 21:06:14,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:14,149 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2022-03-20 21:06:14,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 21:06:14,149 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 21:06:14,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:14,150 INFO L225 Difference]: With dead ends: 116 [2022-03-20 21:06:14,150 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 21:06:14,150 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 21:06:14,150 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 21:06:14,150 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 21:06:14,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 21:06:14,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2022-03-20 21:06:14,162 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 21:06:14,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 131 transitions. [2022-03-20 21:06:14,162 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 131 transitions. Word has length 63 [2022-03-20 21:06:14,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:14,163 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 131 transitions. [2022-03-20 21:06:14,163 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 21:06:14,163 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 131 transitions. [2022-03-20 21:06:14,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 21:06:14,163 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:14,163 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 21:06:14,182 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 21:06:14,379 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 21:06:14,379 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:14,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:14,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1823928061, now seen corresponding path program 5 times [2022-03-20 21:06:14,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:14,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [735427598] [2022-03-20 21:06:14,380 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:14,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1823928061, now seen corresponding path program 6 times [2022-03-20 21:06:14,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:14,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755717333] [2022-03-20 21:06:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:14,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:14,385 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:14,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734670873] [2022-03-20 21:06:14,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:06:14,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:14,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:14,394 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 21:06:14,422 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 21:06:14,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-20 21:06:14,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:14,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 21:06:14,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:14,578 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 21:06:14,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:14,716 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 21:06:14,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:14,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755717333] [2022-03-20 21:06:14,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:14,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734670873] [2022-03-20 21:06:14,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734670873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:14,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:14,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-20 21:06:14,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:14,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [735427598] [2022-03-20 21:06:14,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [735427598] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:14,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:14,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 21:06:14,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45360845] [2022-03-20 21:06:14,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:14,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 21:06:14,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:14,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 21:06:14,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-20 21:06:14,718 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 21:06:14,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:14,817 INFO L93 Difference]: Finished difference Result 149 states and 191 transitions. [2022-03-20 21:06:14,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 21:06:14,818 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 21:06:14,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:14,818 INFO L225 Difference]: With dead ends: 149 [2022-03-20 21:06:14,819 INFO L226 Difference]: Without dead ends: 112 [2022-03-20 21:06:14,819 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 21:06:14,819 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 21:06:14,819 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 21:06:14,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-20 21:06:14,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-03-20 21:06:14,831 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 21:06:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2022-03-20 21:06:14,831 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 65 [2022-03-20 21:06:14,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:14,832 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2022-03-20 21:06:14,832 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 21:06:14,832 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2022-03-20 21:06:14,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 21:06:14,832 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:14,832 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 21:06:14,850 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 21:06:15,048 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 21:06:15,049 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:15,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:15,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1211810838, now seen corresponding path program 1 times [2022-03-20 21:06:15,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:15,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1749835515] [2022-03-20 21:06:15,049 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:15,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1211810838, now seen corresponding path program 2 times [2022-03-20 21:06:15,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:15,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943883896] [2022-03-20 21:06:15,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:15,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:15,059 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:15,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151526372] [2022-03-20 21:06:15,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:15,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:15,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:15,060 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 21:06:15,061 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 21:06:15,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:15,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:15,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 21:06:15,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:15,211 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 21:06:15,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:15,358 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 21:06:15,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:15,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943883896] [2022-03-20 21:06:15,359 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:15,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151526372] [2022-03-20 21:06:15,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151526372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:15,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:15,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-20 21:06:15,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:15,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1749835515] [2022-03-20 21:06:15,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1749835515] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:15,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:15,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 21:06:15,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140849652] [2022-03-20 21:06:15,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:15,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 21:06:15,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:15,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 21:06:15,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-20 21:06:15,360 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 21:06:15,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:15,449 INFO L93 Difference]: Finished difference Result 151 states and 194 transitions. [2022-03-20 21:06:15,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 21:06:15,449 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 21:06:15,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:15,450 INFO L225 Difference]: With dead ends: 151 [2022-03-20 21:06:15,450 INFO L226 Difference]: Without dead ends: 114 [2022-03-20 21:06:15,450 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 21:06:15,450 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 21:06:15,451 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 21:06:15,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-20 21:06:15,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-03-20 21:06:15,462 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 21:06:15,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 140 transitions. [2022-03-20 21:06:15,463 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 140 transitions. Word has length 67 [2022-03-20 21:06:15,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:15,463 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 140 transitions. [2022-03-20 21:06:15,463 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 21:06:15,463 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 140 transitions. [2022-03-20 21:06:15,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 21:06:15,464 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:15,464 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 21:06:15,482 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 21:06:15,680 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 21:06:15,680 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:15,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:15,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1645787183, now seen corresponding path program 5 times [2022-03-20 21:06:15,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:15,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1497860215] [2022-03-20 21:06:15,681 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:15,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1645787183, now seen corresponding path program 6 times [2022-03-20 21:06:15,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:15,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814048678] [2022-03-20 21:06:15,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:15,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:15,686 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:15,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380471975] [2022-03-20 21:06:15,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:06:15,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:15,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:15,689 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 21:06:15,690 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 21:06:15,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 21:06:15,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:15,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 21:06:15,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:15,930 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 21:06:15,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:16,081 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 21:06:16,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:16,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814048678] [2022-03-20 21:06:16,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:16,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380471975] [2022-03-20 21:06:16,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380471975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:16,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:16,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 21:06:16,082 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:16,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1497860215] [2022-03-20 21:06:16,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1497860215] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:16,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:16,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 21:06:16,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809249943] [2022-03-20 21:06:16,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:16,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 21:06:16,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:16,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 21:06:16,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 21:06:16,083 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 21:06:16,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:16,180 INFO L93 Difference]: Finished difference Result 137 states and 169 transitions. [2022-03-20 21:06:16,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 21:06:16,195 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 21:06:16,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:16,197 INFO L225 Difference]: With dead ends: 137 [2022-03-20 21:06:16,197 INFO L226 Difference]: Without dead ends: 132 [2022-03-20 21:06:16,198 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 21:06:16,198 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 21:06:16,198 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 21:06:16,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-20 21:06:16,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2022-03-20 21:06:16,214 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 21:06:16,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 155 transitions. [2022-03-20 21:06:16,215 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 155 transitions. Word has length 71 [2022-03-20 21:06:16,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:16,215 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 155 transitions. [2022-03-20 21:06:16,215 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 21:06:16,216 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 155 transitions. [2022-03-20 21:06:16,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 21:06:16,216 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:16,216 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 21:06:16,235 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 21:06:16,433 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 21:06:16,433 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:16,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:16,434 INFO L85 PathProgramCache]: Analyzing trace with hash -15963768, now seen corresponding path program 1 times [2022-03-20 21:06:16,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:16,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [234569679] [2022-03-20 21:06:16,434 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:16,434 INFO L85 PathProgramCache]: Analyzing trace with hash -15963768, now seen corresponding path program 2 times [2022-03-20 21:06:16,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:16,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462024966] [2022-03-20 21:06:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:16,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:16,450 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:16,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305198354] [2022-03-20 21:06:16,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:16,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:16,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:16,452 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 21:06:16,454 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 21:06:16,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:16,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:16,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 21:06:16,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:16,578 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 21:06:16,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:06:16,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:16,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462024966] [2022-03-20 21:06:16,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:16,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305198354] [2022-03-20 21:06:16,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305198354] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:16,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:16,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 21:06:16,579 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:16,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [234569679] [2022-03-20 21:06:16,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [234569679] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:16,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:16,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 21:06:16,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094353764] [2022-03-20 21:06:16,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:16,579 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 21:06:16,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:16,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 21:06:16,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-20 21:06:16,580 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 21:06:16,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:16,609 INFO L93 Difference]: Finished difference Result 180 states and 235 transitions. [2022-03-20 21:06:16,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 21:06:16,609 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 21:06:16,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:16,611 INFO L225 Difference]: With dead ends: 180 [2022-03-20 21:06:16,611 INFO L226 Difference]: Without dead ends: 143 [2022-03-20 21:06:16,611 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 21:06:16,611 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 21:06:16,611 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 21:06:16,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-20 21:06:16,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2022-03-20 21:06:16,627 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 21:06:16,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2022-03-20 21:06:16,627 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 73 [2022-03-20 21:06:16,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:16,628 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2022-03-20 21:06:16,628 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 21:06:16,628 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2022-03-20 21:06:16,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 21:06:16,628 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:16,628 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 21:06:16,647 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 21:06:16,847 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 21:06:16,847 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:16,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:16,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1401128268, now seen corresponding path program 7 times [2022-03-20 21:06:16,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:16,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1357153880] [2022-03-20 21:06:16,848 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:16,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1401128268, now seen corresponding path program 8 times [2022-03-20 21:06:16,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:16,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176151625] [2022-03-20 21:06:16,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:16,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:16,853 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:16,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765217196] [2022-03-20 21:06:16,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:16,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:16,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:16,854 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 21:06:16,893 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 21:06:16,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:16,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:16,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 21:06:16,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:17,046 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 21:06:17,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:17,189 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 21:06:17,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:17,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176151625] [2022-03-20 21:06:17,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:17,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765217196] [2022-03-20 21:06:17,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765217196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:17,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:17,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 21:06:17,190 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:17,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1357153880] [2022-03-20 21:06:17,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1357153880] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:17,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:17,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 21:06:17,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422659237] [2022-03-20 21:06:17,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:17,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 21:06:17,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:17,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 21:06:17,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 21:06:17,191 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 21:06:17,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:17,301 INFO L93 Difference]: Finished difference Result 193 states and 252 transitions. [2022-03-20 21:06:17,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 21:06:17,301 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 21:06:17,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:17,302 INFO L225 Difference]: With dead ends: 193 [2022-03-20 21:06:17,302 INFO L226 Difference]: Without dead ends: 144 [2022-03-20 21:06:17,302 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 21:06:17,303 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 21:06:17,303 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 21:06:17,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-20 21:06:17,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2022-03-20 21:06:17,329 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 21:06:17,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 177 transitions. [2022-03-20 21:06:17,329 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 177 transitions. Word has length 73 [2022-03-20 21:06:17,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:17,330 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 177 transitions. [2022-03-20 21:06:17,330 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 21:06:17,330 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 177 transitions. [2022-03-20 21:06:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 21:06:17,330 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:17,331 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 21:06:17,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 21:06:17,544 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 21:06:17,545 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:17,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:17,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1116733197, now seen corresponding path program 1 times [2022-03-20 21:06:17,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:17,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [101362319] [2022-03-20 21:06:17,545 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:17,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1116733197, now seen corresponding path program 2 times [2022-03-20 21:06:17,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:17,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193837068] [2022-03-20 21:06:17,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:17,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:17,551 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:17,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540702218] [2022-03-20 21:06:17,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:17,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:17,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:17,554 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 21:06:17,555 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 21:06:17,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:17,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:17,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 21:06:17,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:17,729 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 21:06:17,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:17,866 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 21:06:17,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:17,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193837068] [2022-03-20 21:06:17,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:17,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540702218] [2022-03-20 21:06:17,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540702218] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:17,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:17,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 21:06:17,867 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:17,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [101362319] [2022-03-20 21:06:17,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [101362319] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:17,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:17,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 21:06:17,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099051254] [2022-03-20 21:06:17,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:17,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 21:06:17,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:17,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 21:06:17,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 21:06:17,868 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 21:06:18,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:18,006 INFO L93 Difference]: Finished difference Result 195 states and 255 transitions. [2022-03-20 21:06:18,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 21:06:18,007 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 21:06:18,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:18,008 INFO L225 Difference]: With dead ends: 195 [2022-03-20 21:06:18,008 INFO L226 Difference]: Without dead ends: 146 [2022-03-20 21:06:18,009 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 21:06:18,010 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 66 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 21:06:18,010 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 21:06:18,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-20 21:06:18,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-03-20 21:06:18,048 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 21:06:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 183 transitions. [2022-03-20 21:06:18,049 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 183 transitions. Word has length 75 [2022-03-20 21:06:18,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:18,049 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 183 transitions. [2022-03-20 21:06:18,049 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 21:06:18,049 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 183 transitions. [2022-03-20 21:06:18,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 21:06:18,050 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:18,050 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 21:06:18,079 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 21:06:18,266 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 21:06:18,266 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:18,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:18,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1970775776, now seen corresponding path program 7 times [2022-03-20 21:06:18,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:18,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1716229353] [2022-03-20 21:06:18,267 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:18,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1970775776, now seen corresponding path program 8 times [2022-03-20 21:06:18,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:18,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686017755] [2022-03-20 21:06:18,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:18,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:18,271 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:18,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946847694] [2022-03-20 21:06:18,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:18,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:18,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:18,274 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 21:06:18,274 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 21:06:18,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:18,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:18,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 21:06:18,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:18,479 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 21:06:18,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:18,672 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 21:06:18,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:18,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686017755] [2022-03-20 21:06:18,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:18,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946847694] [2022-03-20 21:06:18,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946847694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:18,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:18,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-20 21:06:18,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:18,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1716229353] [2022-03-20 21:06:18,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1716229353] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:18,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:18,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 21:06:18,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878977193] [2022-03-20 21:06:18,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:18,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 21:06:18,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:18,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 21:06:18,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-20 21:06:18,675 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 21:06:18,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:18,839 INFO L93 Difference]: Finished difference Result 168 states and 210 transitions. [2022-03-20 21:06:18,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 21:06:18,840 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 21:06:18,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:18,841 INFO L225 Difference]: With dead ends: 168 [2022-03-20 21:06:18,841 INFO L226 Difference]: Without dead ends: 163 [2022-03-20 21:06:18,841 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 21:06:18,841 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 21:06:18,841 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 21:06:18,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-20 21:06:18,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2022-03-20 21:06:18,859 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 21:06:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 198 transitions. [2022-03-20 21:06:18,859 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 198 transitions. Word has length 79 [2022-03-20 21:06:18,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:18,860 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 198 transitions. [2022-03-20 21:06:18,860 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 21:06:18,860 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 198 transitions. [2022-03-20 21:06:18,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 21:06:18,860 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:18,861 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 21:06:18,881 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 21:06:19,076 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 21:06:19,077 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:19,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:19,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1693648491, now seen corresponding path program 1 times [2022-03-20 21:06:19,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:19,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1248347550] [2022-03-20 21:06:19,078 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:19,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1693648491, now seen corresponding path program 2 times [2022-03-20 21:06:19,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:19,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727531810] [2022-03-20 21:06:19,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:19,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:19,083 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:19,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517778942] [2022-03-20 21:06:19,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:19,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:19,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:19,085 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 21:06:19,086 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 21:06:19,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:19,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:19,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 21:06:19,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:19,275 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 21:06:19,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:19,470 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 21:06:19,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:19,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727531810] [2022-03-20 21:06:19,470 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:19,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517778942] [2022-03-20 21:06:19,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517778942] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:19,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:19,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-20 21:06:19,471 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:19,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1248347550] [2022-03-20 21:06:19,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1248347550] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:19,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:19,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 21:06:19,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073111807] [2022-03-20 21:06:19,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:19,471 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 21:06:19,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:19,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 21:06:19,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-20 21:06:19,472 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 21:06:19,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:19,603 INFO L93 Difference]: Finished difference Result 213 states and 277 transitions. [2022-03-20 21:06:19,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 21:06:19,603 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 21:06:19,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:19,604 INFO L225 Difference]: With dead ends: 213 [2022-03-20 21:06:19,604 INFO L226 Difference]: Without dead ends: 164 [2022-03-20 21:06:19,605 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 21:06:19,605 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 21:06:19,605 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 21:06:19,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-20 21:06:19,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2022-03-20 21:06:19,622 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 21:06:19,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2022-03-20 21:06:19,623 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 81 [2022-03-20 21:06:19,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:19,623 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2022-03-20 21:06:19,623 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 21:06:19,623 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2022-03-20 21:06:19,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 21:06:19,624 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:19,624 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 21:06:19,643 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 21:06:19,840 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 21:06:19,841 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:19,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:19,841 INFO L85 PathProgramCache]: Analyzing trace with hash -918360272, now seen corresponding path program 3 times [2022-03-20 21:06:19,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:19,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1954853872] [2022-03-20 21:06:19,842 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:19,842 INFO L85 PathProgramCache]: Analyzing trace with hash -918360272, now seen corresponding path program 4 times [2022-03-20 21:06:19,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:19,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486574850] [2022-03-20 21:06:19,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:19,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:19,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:19,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120938991] [2022-03-20 21:06:19,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:06:19,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:19,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:19,852 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 21:06:19,880 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 21:06:19,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:06:19,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:19,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 21:06:19,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:20,116 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 21:06:20,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:20,305 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 21:06:20,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:20,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486574850] [2022-03-20 21:06:20,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:20,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120938991] [2022-03-20 21:06:20,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120938991] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:20,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:20,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-20 21:06:20,306 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:20,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1954853872] [2022-03-20 21:06:20,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1954853872] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:20,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:20,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 21:06:20,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511667547] [2022-03-20 21:06:20,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:20,306 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 21:06:20,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:20,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 21:06:20,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-20 21:06:20,308 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 21:06:20,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:20,410 INFO L93 Difference]: Finished difference Result 215 states and 280 transitions. [2022-03-20 21:06:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 21:06:20,410 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 21:06:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:20,411 INFO L225 Difference]: With dead ends: 215 [2022-03-20 21:06:20,411 INFO L226 Difference]: Without dead ends: 166 [2022-03-20 21:06:20,412 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 21:06:20,415 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 87 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 21:06:20,416 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 21:06:20,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-03-20 21:06:20,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-03-20 21:06:20,434 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 21:06:20,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 208 transitions. [2022-03-20 21:06:20,435 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 208 transitions. Word has length 83 [2022-03-20 21:06:20,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:20,435 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 208 transitions. [2022-03-20 21:06:20,435 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 21:06:20,435 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 208 transitions. [2022-03-20 21:06:20,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 21:06:20,436 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:20,436 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 21:06:20,453 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 21:06:20,652 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 21:06:20,653 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:20,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:20,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1698627479, now seen corresponding path program 1 times [2022-03-20 21:06:20,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:20,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [354737289] [2022-03-20 21:06:20,653 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:20,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1698627479, now seen corresponding path program 2 times [2022-03-20 21:06:20,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:20,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373398467] [2022-03-20 21:06:20,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:20,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:20,658 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:20,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317296363] [2022-03-20 21:06:20,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:20,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:20,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:20,659 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 21:06:20,660 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 21:06:20,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:20,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:20,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 21:06:20,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:20,802 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 21:06:20,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:20,939 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 21:06:20,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:20,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373398467] [2022-03-20 21:06:20,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:20,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317296363] [2022-03-20 21:06:20,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317296363] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:20,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:20,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-20 21:06:20,940 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:20,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [354737289] [2022-03-20 21:06:20,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [354737289] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:20,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:20,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 21:06:20,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731868936] [2022-03-20 21:06:20,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:20,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 21:06:20,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:20,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 21:06:20,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-20 21:06:20,954 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 21:06:21,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:21,136 INFO L93 Difference]: Finished difference Result 188 states and 235 transitions. [2022-03-20 21:06:21,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 21:06:21,137 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 21:06:21,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:21,139 INFO L225 Difference]: With dead ends: 188 [2022-03-20 21:06:21,139 INFO L226 Difference]: Without dead ends: 183 [2022-03-20 21:06:21,140 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 21:06:21,140 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 21:06:21,140 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 21:06:21,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-20 21:06:21,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 177. [2022-03-20 21:06:21,189 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 21:06:21,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 223 transitions. [2022-03-20 21:06:21,191 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 223 transitions. Word has length 87 [2022-03-20 21:06:21,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:21,191 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 223 transitions. [2022-03-20 21:06:21,191 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 21:06:21,191 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 223 transitions. [2022-03-20 21:06:21,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 21:06:21,194 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:21,194 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 21:06:21,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-20 21:06:21,407 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 21:06:21,407 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:21,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:21,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2133755932, now seen corresponding path program 3 times [2022-03-20 21:06:21,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:21,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [159734514] [2022-03-20 21:06:21,408 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:21,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2133755932, now seen corresponding path program 4 times [2022-03-20 21:06:21,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:21,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053170661] [2022-03-20 21:06:21,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:21,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:21,413 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:21,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380792383] [2022-03-20 21:06:21,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:06:21,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:21,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:21,415 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 21:06:21,416 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 21:06:21,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:06:21,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:21,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 21:06:21,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:21,549 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 21:06:21,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:21,696 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 21:06:21,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:21,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053170661] [2022-03-20 21:06:21,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:21,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380792383] [2022-03-20 21:06:21,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380792383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:21,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:21,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-03-20 21:06:21,697 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:21,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [159734514] [2022-03-20 21:06:21,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [159734514] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:21,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:21,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 21:06:21,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482506732] [2022-03-20 21:06:21,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:21,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 21:06:21,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:21,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 21:06:21,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 21:06:21,698 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 21:06:21,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:21,753 INFO L93 Difference]: Finished difference Result 407 states and 543 transitions. [2022-03-20 21:06:21,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 21:06:21,753 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 21:06:21,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:21,755 INFO L225 Difference]: With dead ends: 407 [2022-03-20 21:06:21,755 INFO L226 Difference]: Without dead ends: 301 [2022-03-20 21:06:21,755 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 21:06:21,756 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 21:06:21,756 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 21:06:21,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-03-20 21:06:21,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 296. [2022-03-20 21:06:21,826 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 21:06:21,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 395 transitions. [2022-03-20 21:06:21,827 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 395 transitions. Word has length 89 [2022-03-20 21:06:21,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:21,827 INFO L478 AbstractCegarLoop]: Abstraction has 296 states and 395 transitions. [2022-03-20 21:06:21,828 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 21:06:21,828 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 395 transitions. [2022-03-20 21:06:21,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 21:06:21,829 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:21,829 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 21:06:21,845 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 21:06:22,045 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 21:06:22,045 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:22,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:22,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1322512306, now seen corresponding path program 5 times [2022-03-20 21:06:22,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:22,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1128575127] [2022-03-20 21:06:22,046 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:22,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1322512306, now seen corresponding path program 6 times [2022-03-20 21:06:22,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:22,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054217617] [2022-03-20 21:06:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:22,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:22,051 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:22,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619064786] [2022-03-20 21:06:22,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:06:22,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:22,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:22,055 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 21:06:22,056 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 21:06:22,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-20 21:06:22,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:22,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 21:06:22,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:22,349 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 21:06:22,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:22,582 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 21:06:22,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:22,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054217617] [2022-03-20 21:06:22,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:22,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619064786] [2022-03-20 21:06:22,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619064786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:22,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:22,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-20 21:06:22,582 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:22,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1128575127] [2022-03-20 21:06:22,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1128575127] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:22,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:22,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 21:06:22,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635680013] [2022-03-20 21:06:22,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:22,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 21:06:22,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:22,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 21:06:22,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 21:06:22,584 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 21:06:22,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:22,818 INFO L93 Difference]: Finished difference Result 362 states and 486 transitions. [2022-03-20 21:06:22,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 21:06:22,818 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 21:06:22,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:22,820 INFO L225 Difference]: With dead ends: 362 [2022-03-20 21:06:22,820 INFO L226 Difference]: Without dead ends: 357 [2022-03-20 21:06:22,821 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 21:06:22,821 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 21:06:22,821 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 21:06:22,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-03-20 21:06:22,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 342. [2022-03-20 21:06:22,873 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 21:06:22,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 460 transitions. [2022-03-20 21:06:22,874 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 460 transitions. Word has length 89 [2022-03-20 21:06:22,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:22,874 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 460 transitions. [2022-03-20 21:06:22,874 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 21:06:22,874 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 460 transitions. [2022-03-20 21:06:22,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 21:06:22,875 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:22,875 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 21:06:22,892 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 21:06:23,079 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 21:06:23,080 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:23,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:23,080 INFO L85 PathProgramCache]: Analyzing trace with hash -345961389, now seen corresponding path program 5 times [2022-03-20 21:06:23,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:23,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1719272984] [2022-03-20 21:06:23,080 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:23,081 INFO L85 PathProgramCache]: Analyzing trace with hash -345961389, now seen corresponding path program 6 times [2022-03-20 21:06:23,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:23,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568696797] [2022-03-20 21:06:23,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:23,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:23,086 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:23,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657095847] [2022-03-20 21:06:23,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:06:23,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:23,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:23,087 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 21:06:23,088 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 21:06:23,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-20 21:06:23,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:23,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 21:06:23,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:23,335 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 21:06:23,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:23,475 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 21:06:23,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:23,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568696797] [2022-03-20 21:06:23,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:23,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657095847] [2022-03-20 21:06:23,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657095847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:23,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:23,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-20 21:06:23,476 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:23,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1719272984] [2022-03-20 21:06:23,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1719272984] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:23,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:23,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 21:06:23,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213088332] [2022-03-20 21:06:23,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:23,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 21:06:23,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:23,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 21:06:23,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-20 21:06:23,477 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 21:06:23,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:23,735 INFO L93 Difference]: Finished difference Result 427 states and 585 transitions. [2022-03-20 21:06:23,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 21:06:23,747 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 21:06:23,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:23,749 INFO L225 Difference]: With dead ends: 427 [2022-03-20 21:06:23,749 INFO L226 Difference]: Without dead ends: 342 [2022-03-20 21:06:23,749 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=335, Invalid=477, Unknown=0, NotChecked=0, Total=812 [2022-03-20 21:06:23,749 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 21:06:23,750 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 21:06:23,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-03-20 21:06:23,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2022-03-20 21:06:23,831 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 21:06:23,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 456 transitions. [2022-03-20 21:06:23,834 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 456 transitions. Word has length 91 [2022-03-20 21:06:23,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:23,834 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 456 transitions. [2022-03-20 21:06:23,834 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 21:06:23,834 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 456 transitions. [2022-03-20 21:06:23,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 21:06:23,839 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:23,839 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 21:06:23,847 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 21:06:24,047 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 21:06:24,047 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:24,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:24,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1660747519, now seen corresponding path program 7 times [2022-03-20 21:06:24,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:24,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [377296129] [2022-03-20 21:06:24,048 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:24,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1660747519, now seen corresponding path program 8 times [2022-03-20 21:06:24,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:24,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450037298] [2022-03-20 21:06:24,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:24,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:24,054 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:24,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407820537] [2022-03-20 21:06:24,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:24,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:24,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:24,062 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 21:06:24,063 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 21:06:24,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:24,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:24,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 21:06:24,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:24,286 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 21:06:24,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:24,504 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 21:06:24,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:24,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450037298] [2022-03-20 21:06:24,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:24,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407820537] [2022-03-20 21:06:24,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407820537] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:24,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:24,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-20 21:06:24,505 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:24,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [377296129] [2022-03-20 21:06:24,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [377296129] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:24,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:24,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 21:06:24,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101512446] [2022-03-20 21:06:24,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:24,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 21:06:24,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:24,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 21:06:24,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 21:06:24,506 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 21:06:24,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:24,724 INFO L93 Difference]: Finished difference Result 467 states and 640 transitions. [2022-03-20 21:06:24,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 21:06:24,759 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 21:06:24,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:24,761 INFO L225 Difference]: With dead ends: 467 [2022-03-20 21:06:24,761 INFO L226 Difference]: Without dead ends: 352 [2022-03-20 21:06:24,761 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=383, Invalid=547, Unknown=0, NotChecked=0, Total=930 [2022-03-20 21:06:24,762 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 21:06:24,762 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 21:06:24,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-03-20 21:06:24,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 344. [2022-03-20 21:06:24,821 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 21:06:24,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 457 transitions. [2022-03-20 21:06:24,823 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 457 transitions. Word has length 97 [2022-03-20 21:06:24,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:24,824 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 457 transitions. [2022-03-20 21:06:24,825 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 21:06:24,825 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 457 transitions. [2022-03-20 21:06:24,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 21:06:24,827 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:24,827 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 21:06:24,862 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 21:06:25,040 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 21:06:25,040 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:25,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:25,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1020733748, now seen corresponding path program 7 times [2022-03-20 21:06:25,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:25,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1214162655] [2022-03-20 21:06:25,041 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:25,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1020733748, now seen corresponding path program 8 times [2022-03-20 21:06:25,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:25,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864359901] [2022-03-20 21:06:25,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:25,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:25,045 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:25,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800802937] [2022-03-20 21:06:25,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:25,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:25,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:25,049 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 21:06:25,050 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 21:06:25,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:25,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:25,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 21:06:25,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:25,215 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 21:06:25,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:06:25,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:25,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864359901] [2022-03-20 21:06:25,215 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:25,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800802937] [2022-03-20 21:06:25,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800802937] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:25,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:25,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 21:06:25,215 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:25,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1214162655] [2022-03-20 21:06:25,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1214162655] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:25,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:25,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 21:06:25,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401053753] [2022-03-20 21:06:25,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:25,216 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 21:06:25,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:25,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 21:06:25,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-20 21:06:25,216 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 21:06:25,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:25,276 INFO L93 Difference]: Finished difference Result 504 states and 675 transitions. [2022-03-20 21:06:25,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 21:06:25,276 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 21:06:25,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:25,278 INFO L225 Difference]: With dead ends: 504 [2022-03-20 21:06:25,278 INFO L226 Difference]: Without dead ends: 362 [2022-03-20 21:06:25,278 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 21:06:25,279 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 21:06:25,279 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 21:06:25,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-03-20 21:06:25,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 352. [2022-03-20 21:06:25,347 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 21:06:25,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 468 transitions. [2022-03-20 21:06:25,349 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 468 transitions. Word has length 99 [2022-03-20 21:06:25,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:25,349 INFO L478 AbstractCegarLoop]: Abstraction has 352 states and 468 transitions. [2022-03-20 21:06:25,349 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 21:06:25,349 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 468 transitions. [2022-03-20 21:06:25,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 21:06:25,350 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:25,350 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 21:06:25,366 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 21:06:25,564 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 21:06:25,565 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:25,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:25,565 INFO L85 PathProgramCache]: Analyzing trace with hash 359487094, now seen corresponding path program 9 times [2022-03-20 21:06:25,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:25,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [430295714] [2022-03-20 21:06:25,565 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:25,566 INFO L85 PathProgramCache]: Analyzing trace with hash 359487094, now seen corresponding path program 10 times [2022-03-20 21:06:25,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:25,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074597943] [2022-03-20 21:06:25,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:25,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:25,570 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:25,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673670178] [2022-03-20 21:06:25,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:06:25,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:25,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:25,572 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 21:06:25,594 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 21:06:25,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:06:25,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:25,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 21:06:25,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:25,897 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 21:06:25,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:26,148 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 21:06:26,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:26,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074597943] [2022-03-20 21:06:26,149 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:26,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673670178] [2022-03-20 21:06:26,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673670178] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:26,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:26,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-20 21:06:26,149 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:26,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [430295714] [2022-03-20 21:06:26,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [430295714] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:26,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:26,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 21:06:26,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562327323] [2022-03-20 21:06:26,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:26,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 21:06:26,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:26,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 21:06:26,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 21:06:26,150 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 21:06:26,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:26,375 INFO L93 Difference]: Finished difference Result 471 states and 642 transitions. [2022-03-20 21:06:26,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 21:06:26,375 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 21:06:26,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:26,376 INFO L225 Difference]: With dead ends: 471 [2022-03-20 21:06:26,376 INFO L226 Difference]: Without dead ends: 364 [2022-03-20 21:06:26,377 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 21:06:26,378 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 21:06:26,378 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 21:06:26,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-03-20 21:06:26,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2022-03-20 21:06:26,458 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 21:06:26,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 480 transitions. [2022-03-20 21:06:26,459 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 480 transitions. Word has length 99 [2022-03-20 21:06:26,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:26,460 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 480 transitions. [2022-03-20 21:06:26,460 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 21:06:26,460 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 480 transitions. [2022-03-20 21:06:26,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 21:06:26,461 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:26,462 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 21:06:26,477 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 21:06:26,677 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 21:06:26,677 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:26,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:26,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1761003221, now seen corresponding path program 3 times [2022-03-20 21:06:26,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:26,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [425874799] [2022-03-20 21:06:26,678 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:26,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1761003221, now seen corresponding path program 4 times [2022-03-20 21:06:26,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:26,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594077791] [2022-03-20 21:06:26,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:26,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:26,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:26,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322329580] [2022-03-20 21:06:26,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:06:26,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:26,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:26,685 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 21:06:26,686 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 21:06:26,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:06:26,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:26,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 21:06:26,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:26,973 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 21:06:26,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:27,209 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 21:06:27,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:27,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594077791] [2022-03-20 21:06:27,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:27,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322329580] [2022-03-20 21:06:27,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322329580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:27,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:27,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-20 21:06:27,211 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:27,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [425874799] [2022-03-20 21:06:27,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [425874799] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:27,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:27,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 21:06:27,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579520110] [2022-03-20 21:06:27,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:27,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 21:06:27,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:27,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 21:06:27,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-20 21:06:27,213 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 21:06:27,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:27,426 INFO L93 Difference]: Finished difference Result 407 states and 538 transitions. [2022-03-20 21:06:27,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 21:06:27,426 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 21:06:27,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:27,428 INFO L225 Difference]: With dead ends: 407 [2022-03-20 21:06:27,428 INFO L226 Difference]: Without dead ends: 396 [2022-03-20 21:06:27,429 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=438, Invalid=618, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 21:06:27,429 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 21:06:27,429 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 21:06:27,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-03-20 21:06:27,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 377. [2022-03-20 21:06:27,483 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 21:06:27,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 501 transitions. [2022-03-20 21:06:27,484 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 501 transitions. Word has length 103 [2022-03-20 21:06:27,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:27,485 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 501 transitions. [2022-03-20 21:06:27,485 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 21:06:27,485 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 501 transitions. [2022-03-20 21:06:27,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 21:06:27,487 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:27,487 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 21:06:27,514 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 21:06:27,703 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 21:06:27,703 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:27,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:27,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1733340336, now seen corresponding path program 9 times [2022-03-20 21:06:27,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:27,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [434737392] [2022-03-20 21:06:27,704 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:27,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1733340336, now seen corresponding path program 10 times [2022-03-20 21:06:27,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:27,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971479250] [2022-03-20 21:06:27,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:27,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:27,713 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:27,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119980994] [2022-03-20 21:06:27,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:06:27,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:27,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:27,715 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 21:06:27,716 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 21:06:27,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:06:27,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:27,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 21:06:27,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:27,877 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 21:06:27,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:27,974 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 21:06:27,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:27,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971479250] [2022-03-20 21:06:27,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:27,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119980994] [2022-03-20 21:06:27,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119980994] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:27,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:27,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 21:06:27,975 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:27,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [434737392] [2022-03-20 21:06:27,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [434737392] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:27,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:27,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 21:06:27,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200117570] [2022-03-20 21:06:27,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:27,975 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 21:06:27,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:27,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 21:06:27,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 21:06:27,976 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 21:06:28,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:28,243 INFO L93 Difference]: Finished difference Result 649 states and 907 transitions. [2022-03-20 21:06:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 21:06:28,244 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 21:06:28,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:28,246 INFO L225 Difference]: With dead ends: 649 [2022-03-20 21:06:28,247 INFO L226 Difference]: Without dead ends: 588 [2022-03-20 21:06:28,248 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 21:06:28,248 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 38 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:28,248 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 344 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:06:28,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-03-20 21:06:28,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 504. [2022-03-20 21:06:28,385 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 21:06:28,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 695 transitions. [2022-03-20 21:06:28,387 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 695 transitions. Word has length 105 [2022-03-20 21:06:28,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:28,387 INFO L478 AbstractCegarLoop]: Abstraction has 504 states and 695 transitions. [2022-03-20 21:06:28,387 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 21:06:28,387 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 695 transitions. [2022-03-20 21:06:28,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 21:06:28,389 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:28,389 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 21:06:28,424 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 21:06:28,603 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 21:06:28,603 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:28,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:28,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1666981150, now seen corresponding path program 11 times [2022-03-20 21:06:28,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:28,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2019586819] [2022-03-20 21:06:28,604 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:28,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1666981150, now seen corresponding path program 12 times [2022-03-20 21:06:28,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:28,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624583650] [2022-03-20 21:06:28,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:28,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:28,610 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:28,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878223227] [2022-03-20 21:06:28,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:06:28,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:28,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:28,612 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 21:06:28,613 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 21:06:28,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 21:06:28,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:28,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 21:06:28,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:28,856 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 21:06:28,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:29,023 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 21:06:29,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:29,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624583650] [2022-03-20 21:06:29,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:29,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878223227] [2022-03-20 21:06:29,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878223227] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:29,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:29,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-20 21:06:29,024 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:29,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2019586819] [2022-03-20 21:06:29,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2019586819] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:29,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:29,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 21:06:29,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343631385] [2022-03-20 21:06:29,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:29,025 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 21:06:29,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:29,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 21:06:29,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-20 21:06:29,025 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 21:06:29,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:29,287 INFO L93 Difference]: Finished difference Result 753 states and 1073 transitions. [2022-03-20 21:06:29,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 21:06:29,288 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 21:06:29,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:29,289 INFO L225 Difference]: With dead ends: 753 [2022-03-20 21:06:29,289 INFO L226 Difference]: Without dead ends: 532 [2022-03-20 21:06:29,290 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=465, Invalid=657, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 21:06:29,291 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 129 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:29,291 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 264 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:06:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-03-20 21:06:29,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 522. [2022-03-20 21:06:29,369 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 21:06:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 717 transitions. [2022-03-20 21:06:29,370 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 717 transitions. Word has length 105 [2022-03-20 21:06:29,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:29,370 INFO L478 AbstractCegarLoop]: Abstraction has 522 states and 717 transitions. [2022-03-20 21:06:29,370 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 21:06:29,370 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 717 transitions. [2022-03-20 21:06:29,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 21:06:29,372 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:29,372 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 21:06:29,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-20 21:06:29,588 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 21:06:29,588 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:29,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:29,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2132095591, now seen corresponding path program 11 times [2022-03-20 21:06:29,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:29,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [39421918] [2022-03-20 21:06:29,589 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:29,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2132095591, now seen corresponding path program 12 times [2022-03-20 21:06:29,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:29,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394273098] [2022-03-20 21:06:29,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:29,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:29,593 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:29,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942230618] [2022-03-20 21:06:29,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:06:29,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:29,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:29,594 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 21:06:29,595 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 21:06:29,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 21:06:29,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:29,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 21:06:29,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:29,840 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 21:06:29,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:30,021 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 21:06:30,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:30,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394273098] [2022-03-20 21:06:30,022 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:30,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942230618] [2022-03-20 21:06:30,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942230618] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:30,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:30,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-20 21:06:30,022 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:30,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [39421918] [2022-03-20 21:06:30,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [39421918] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:30,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:30,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 21:06:30,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366849317] [2022-03-20 21:06:30,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:30,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 21:06:30,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:30,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 21:06:30,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-20 21:06:30,024 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 21:06:30,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:30,271 INFO L93 Difference]: Finished difference Result 735 states and 1041 transitions. [2022-03-20 21:06:30,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 21:06:30,271 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 21:06:30,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:30,288 INFO L225 Difference]: With dead ends: 735 [2022-03-20 21:06:30,288 INFO L226 Difference]: Without dead ends: 538 [2022-03-20 21:06:30,289 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=497, Invalid=693, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 21:06:30,292 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 156 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:30,292 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 250 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:06:30,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-03-20 21:06:30,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2022-03-20 21:06:30,385 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 21:06:30,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 733 transitions. [2022-03-20 21:06:30,387 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 733 transitions. Word has length 107 [2022-03-20 21:06:30,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:30,387 INFO L478 AbstractCegarLoop]: Abstraction has 538 states and 733 transitions. [2022-03-20 21:06:30,387 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 21:06:30,387 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 733 transitions. [2022-03-20 21:06:30,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 21:06:30,388 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:30,388 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 21:06:30,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-20 21:06:30,593 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 21:06:30,593 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:30,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:30,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1965005106, now seen corresponding path program 5 times [2022-03-20 21:06:30,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:30,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1476294845] [2022-03-20 21:06:30,594 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:30,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1965005106, now seen corresponding path program 6 times [2022-03-20 21:06:30,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:30,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167077260] [2022-03-20 21:06:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:30,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:30,598 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:30,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627475466] [2022-03-20 21:06:30,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:06:30,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:30,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:30,599 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 21:06:30,600 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 21:06:30,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 21:06:30,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:30,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 21:06:30,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:30,879 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 21:06:30,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:31,070 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 21:06:31,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:31,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167077260] [2022-03-20 21:06:31,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:31,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627475466] [2022-03-20 21:06:31,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627475466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:31,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:31,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-20 21:06:31,071 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:31,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1476294845] [2022-03-20 21:06:31,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1476294845] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:31,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:31,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 21:06:31,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065905843] [2022-03-20 21:06:31,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:31,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 21:06:31,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:31,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 21:06:31,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-20 21:06:31,072 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 21:06:31,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:31,326 INFO L93 Difference]: Finished difference Result 593 states and 810 transitions. [2022-03-20 21:06:31,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 21:06:31,326 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 21:06:31,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:31,328 INFO L225 Difference]: With dead ends: 593 [2022-03-20 21:06:31,328 INFO L226 Difference]: Without dead ends: 582 [2022-03-20 21:06:31,329 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=525, Invalid=735, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 21:06:31,329 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 201 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:31,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 265 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:06:31,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-03-20 21:06:31,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 560. [2022-03-20 21:06:31,458 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 21:06:31,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 768 transitions. [2022-03-20 21:06:31,460 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 768 transitions. Word has length 111 [2022-03-20 21:06:31,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:31,460 INFO L478 AbstractCegarLoop]: Abstraction has 560 states and 768 transitions. [2022-03-20 21:06:31,460 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 21:06:31,460 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 768 transitions. [2022-03-20 21:06:31,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 21:06:31,461 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:31,461 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 21:06:31,484 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 21:06:31,666 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 21:06:31,666 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:31,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:31,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1038942829, now seen corresponding path program 13 times [2022-03-20 21:06:31,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:31,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1447403225] [2022-03-20 21:06:31,667 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:31,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1038942829, now seen corresponding path program 14 times [2022-03-20 21:06:31,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:31,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257931015] [2022-03-20 21:06:31,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:31,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:31,672 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:31,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212946456] [2022-03-20 21:06:31,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:31,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:31,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:31,696 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 21:06:31,733 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 21:06:31,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:31,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:31,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 21:06:31,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:31,963 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 21:06:31,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:32,185 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 21:06:32,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:32,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257931015] [2022-03-20 21:06:32,185 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:32,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212946456] [2022-03-20 21:06:32,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212946456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:32,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:32,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 21:06:32,186 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:32,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1447403225] [2022-03-20 21:06:32,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1447403225] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:32,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:32,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 21:06:32,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199584727] [2022-03-20 21:06:32,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:32,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 21:06:32,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:32,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 21:06:32,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-20 21:06:32,187 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 21:06:32,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:32,476 INFO L93 Difference]: Finished difference Result 862 states and 1224 transitions. [2022-03-20 21:06:32,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 21:06:32,476 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 21:06:32,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:32,479 INFO L225 Difference]: With dead ends: 862 [2022-03-20 21:06:32,479 INFO L226 Difference]: Without dead ends: 711 [2022-03-20 21:06:32,480 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 21:06:32,480 INFO L913 BasicCegarLoop]: 113 mSDtfsCounter, 70 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:32,481 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 465 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:06:32,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-03-20 21:06:32,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 560. [2022-03-20 21:06:32,660 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 21:06:32,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 768 transitions. [2022-03-20 21:06:32,661 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 768 transitions. Word has length 113 [2022-03-20 21:06:32,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:32,661 INFO L478 AbstractCegarLoop]: Abstraction has 560 states and 768 transitions. [2022-03-20 21:06:32,661 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 21:06:32,662 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 768 transitions. [2022-03-20 21:06:32,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 21:06:32,663 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:32,663 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 21:06:32,688 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 21:06:32,863 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 21:06:32,863 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:32,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:32,864 INFO L85 PathProgramCache]: Analyzing trace with hash -144297019, now seen corresponding path program 15 times [2022-03-20 21:06:32,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:32,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1578501042] [2022-03-20 21:06:32,864 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:32,864 INFO L85 PathProgramCache]: Analyzing trace with hash -144297019, now seen corresponding path program 16 times [2022-03-20 21:06:32,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:32,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940717434] [2022-03-20 21:06:32,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:32,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:32,868 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:32,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581929191] [2022-03-20 21:06:32,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:06:32,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:32,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:32,872 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 21:06:32,892 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 21:06:33,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:06:33,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:33,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 21:06:33,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:33,477 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 21:06:33,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:33,798 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 21:06:33,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:33,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940717434] [2022-03-20 21:06:33,799 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:33,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581929191] [2022-03-20 21:06:33,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581929191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:33,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:33,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-20 21:06:33,799 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:33,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1578501042] [2022-03-20 21:06:33,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1578501042] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:33,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:33,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 21:06:33,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106258930] [2022-03-20 21:06:33,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:33,800 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 21:06:33,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:33,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 21:06:33,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-20 21:06:33,800 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 21:06:34,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:34,120 INFO L93 Difference]: Finished difference Result 781 states and 1101 transitions. [2022-03-20 21:06:34,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 21:06:34,121 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 21:06:34,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:34,123 INFO L225 Difference]: With dead ends: 781 [2022-03-20 21:06:34,123 INFO L226 Difference]: Without dead ends: 588 [2022-03-20 21:06:34,124 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=555, Invalid=777, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 21:06:34,124 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 181 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:34,124 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 267 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:06:34,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-03-20 21:06:34,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 578. [2022-03-20 21:06:34,299 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 21:06:34,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 790 transitions. [2022-03-20 21:06:34,303 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 790 transitions. Word has length 113 [2022-03-20 21:06:34,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:34,303 INFO L478 AbstractCegarLoop]: Abstraction has 578 states and 790 transitions. [2022-03-20 21:06:34,304 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 21:06:34,304 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 790 transitions. [2022-03-20 21:06:34,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 21:06:34,324 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:34,324 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 21:06:34,343 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 21:06:34,527 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 21:06:34,527 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:34,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:34,528 INFO L85 PathProgramCache]: Analyzing trace with hash 533963976, now seen corresponding path program 13 times [2022-03-20 21:06:34,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:34,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [407829110] [2022-03-20 21:06:34,528 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:34,528 INFO L85 PathProgramCache]: Analyzing trace with hash 533963976, now seen corresponding path program 14 times [2022-03-20 21:06:34,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:34,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444655162] [2022-03-20 21:06:34,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:34,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:34,532 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:34,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407548610] [2022-03-20 21:06:34,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:34,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:34,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:34,564 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 21:06:34,565 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 21:06:34,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:34,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:34,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 21:06:34,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:34,852 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 21:06:34,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:35,162 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 21:06:35,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:35,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444655162] [2022-03-20 21:06:35,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:35,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407548610] [2022-03-20 21:06:35,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407548610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:35,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:35,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-20 21:06:35,162 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:35,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [407829110] [2022-03-20 21:06:35,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [407829110] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:35,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:35,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 21:06:35,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954491639] [2022-03-20 21:06:35,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:35,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 21:06:35,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:35,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 21:06:35,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-20 21:06:35,164 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 21:06:35,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:35,443 INFO L93 Difference]: Finished difference Result 791 states and 1114 transitions. [2022-03-20 21:06:35,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 21:06:35,444 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 21:06:35,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:35,446 INFO L225 Difference]: With dead ends: 791 [2022-03-20 21:06:35,446 INFO L226 Difference]: Without dead ends: 594 [2022-03-20 21:06:35,449 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=590, Invalid=816, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 21:06:35,450 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 130 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:35,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 288 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:06:35,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-03-20 21:06:35,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 594. [2022-03-20 21:06:35,586 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 21:06:35,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 806 transitions. [2022-03-20 21:06:35,588 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 806 transitions. Word has length 115 [2022-03-20 21:06:35,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:35,588 INFO L478 AbstractCegarLoop]: Abstraction has 594 states and 806 transitions. [2022-03-20 21:06:35,588 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 21:06:35,588 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 806 transitions. [2022-03-20 21:06:35,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-20 21:06:35,601 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:35,601 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 21:06:35,607 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 21:06:35,805 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 21:06:35,805 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:35,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:35,806 INFO L85 PathProgramCache]: Analyzing trace with hash 650985841, now seen corresponding path program 7 times [2022-03-20 21:06:35,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:35,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [303592517] [2022-03-20 21:06:35,806 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:35,806 INFO L85 PathProgramCache]: Analyzing trace with hash 650985841, now seen corresponding path program 8 times [2022-03-20 21:06:35,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:35,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202837532] [2022-03-20 21:06:35,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:35,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:35,812 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:35,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318407849] [2022-03-20 21:06:35,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:35,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:35,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:35,813 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 21:06:35,817 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 21:06:35,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:35,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:35,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 21:06:35,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:36,110 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 21:06:36,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:36,431 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 21:06:36,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:36,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202837532] [2022-03-20 21:06:36,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:36,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318407849] [2022-03-20 21:06:36,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318407849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:36,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:36,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-20 21:06:36,433 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:36,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [303592517] [2022-03-20 21:06:36,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [303592517] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:36,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:36,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 21:06:36,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119246122] [2022-03-20 21:06:36,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:36,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 21:06:36,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:36,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 21:06:36,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-20 21:06:36,434 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 21:06:36,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:36,763 INFO L93 Difference]: Finished difference Result 649 states and 883 transitions. [2022-03-20 21:06:36,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 21:06:36,763 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 21:06:36,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:36,765 INFO L225 Difference]: With dead ends: 649 [2022-03-20 21:06:36,765 INFO L226 Difference]: Without dead ends: 638 [2022-03-20 21:06:36,766 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=620, Invalid=862, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 21:06:36,766 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 162 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:36,766 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 302 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:06:36,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-03-20 21:06:36,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 616. [2022-03-20 21:06:36,872 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 21:06:36,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 841 transitions. [2022-03-20 21:06:36,873 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 841 transitions. Word has length 119 [2022-03-20 21:06:36,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:36,874 INFO L478 AbstractCegarLoop]: Abstraction has 616 states and 841 transitions. [2022-03-20 21:06:36,874 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 21:06:36,874 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 841 transitions. [2022-03-20 21:06:36,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 21:06:36,875 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:36,875 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 21:06:36,891 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 21:06:37,091 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 21:06:37,091 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:37,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:37,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1267134888, now seen corresponding path program 17 times [2022-03-20 21:06:37,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:37,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1126838682] [2022-03-20 21:06:37,092 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:37,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1267134888, now seen corresponding path program 18 times [2022-03-20 21:06:37,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:37,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738046699] [2022-03-20 21:06:37,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:37,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:37,096 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:37,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658869753] [2022-03-20 21:06:37,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:06:37,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:37,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:37,097 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 21:06:37,098 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 21:06:37,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-20 21:06:37,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:37,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 21:06:37,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:37,871 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 21:06:37,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:38,079 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 21:06:38,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:38,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738046699] [2022-03-20 21:06:38,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:38,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658869753] [2022-03-20 21:06:38,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658869753] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:38,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:38,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-20 21:06:38,080 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:38,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1126838682] [2022-03-20 21:06:38,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1126838682] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:38,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:38,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 21:06:38,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594531594] [2022-03-20 21:06:38,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:38,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 21:06:38,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:38,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 21:06:38,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-20 21:06:38,082 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 21:06:38,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:38,415 INFO L93 Difference]: Finished difference Result 837 states and 1174 transitions. [2022-03-20 21:06:38,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 21:06:38,415 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 21:06:38,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:38,418 INFO L225 Difference]: With dead ends: 837 [2022-03-20 21:06:38,418 INFO L226 Difference]: Without dead ends: 644 [2022-03-20 21:06:38,422 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=653, Invalid=907, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 21:06:38,422 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 164 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:38,422 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 285 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:06:38,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-03-20 21:06:38,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 634. [2022-03-20 21:06:38,568 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 21:06:38,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 863 transitions. [2022-03-20 21:06:38,570 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 863 transitions. Word has length 121 [2022-03-20 21:06:38,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:38,571 INFO L478 AbstractCegarLoop]: Abstraction has 634 states and 863 transitions. [2022-03-20 21:06:38,571 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 21:06:38,571 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 863 transitions. [2022-03-20 21:06:38,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-20 21:06:38,572 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:38,573 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 21:06:38,580 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 21:06:38,783 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 21:06:38,783 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:38,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:38,784 INFO L85 PathProgramCache]: Analyzing trace with hash 487500267, now seen corresponding path program 15 times [2022-03-20 21:06:38,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:38,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1753608477] [2022-03-20 21:06:38,785 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:38,785 INFO L85 PathProgramCache]: Analyzing trace with hash 487500267, now seen corresponding path program 16 times [2022-03-20 21:06:38,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:38,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708915671] [2022-03-20 21:06:38,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:38,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:38,790 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:38,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874225201] [2022-03-20 21:06:38,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:06:38,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:38,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:38,792 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 21:06:38,842 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 21:06:38,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:06:38,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:38,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 21:06:38,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:39,264 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 21:06:39,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:39,612 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 21:06:39,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:39,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708915671] [2022-03-20 21:06:39,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:39,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874225201] [2022-03-20 21:06:39,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874225201] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:39,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:39,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-20 21:06:39,613 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:39,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1753608477] [2022-03-20 21:06:39,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1753608477] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:39,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:39,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 21:06:39,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773682408] [2022-03-20 21:06:39,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:39,614 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 21:06:39,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:39,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 21:06:39,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-20 21:06:39,615 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 21:06:39,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:39,985 INFO L93 Difference]: Finished difference Result 847 states and 1187 transitions. [2022-03-20 21:06:39,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 21:06:39,986 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 21:06:39,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:39,994 INFO L225 Difference]: With dead ends: 847 [2022-03-20 21:06:39,995 INFO L226 Difference]: Without dead ends: 650 [2022-03-20 21:06:39,996 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=691, Invalid=949, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 21:06:39,996 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 184 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:39,996 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 299 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:06:39,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-03-20 21:06:40,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 650. [2022-03-20 21:06:40,111 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 21:06:40,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 879 transitions. [2022-03-20 21:06:40,114 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 879 transitions. Word has length 123 [2022-03-20 21:06:40,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:40,114 INFO L478 AbstractCegarLoop]: Abstraction has 650 states and 879 transitions. [2022-03-20 21:06:40,115 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 21:06:40,115 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 879 transitions. [2022-03-20 21:06:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 21:06:40,116 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:40,116 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 21:06:40,132 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 21:06:40,331 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 21:06:40,331 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:40,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:40,332 INFO L85 PathProgramCache]: Analyzing trace with hash -992818924, now seen corresponding path program 9 times [2022-03-20 21:06:40,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:40,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [45373820] [2022-03-20 21:06:40,332 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:40,332 INFO L85 PathProgramCache]: Analyzing trace with hash -992818924, now seen corresponding path program 10 times [2022-03-20 21:06:40,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:40,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374137219] [2022-03-20 21:06:40,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:40,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:40,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:40,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13367497] [2022-03-20 21:06:40,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:06:40,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:40,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:40,343 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 21:06:40,345 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 21:06:40,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:06:40,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:40,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 21:06:40,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:40,637 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 21:06:40,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:40,980 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 21:06:40,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:40,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374137219] [2022-03-20 21:06:40,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:40,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13367497] [2022-03-20 21:06:40,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13367497] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:40,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:40,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-20 21:06:40,981 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:40,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [45373820] [2022-03-20 21:06:40,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [45373820] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:40,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:40,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 21:06:40,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528181388] [2022-03-20 21:06:40,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:40,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 21:06:40,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:40,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 21:06:40,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-20 21:06:40,982 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 21:06:41,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:41,356 INFO L93 Difference]: Finished difference Result 705 states and 956 transitions. [2022-03-20 21:06:41,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 21:06:41,357 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 21:06:41,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:41,360 INFO L225 Difference]: With dead ends: 705 [2022-03-20 21:06:41,360 INFO L226 Difference]: Without dead ends: 694 [2022-03-20 21:06:41,361 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=723, Invalid=999, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 21:06:41,362 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 220 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:41,363 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 296 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:06:41,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-03-20 21:06:41,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 672. [2022-03-20 21:06:41,502 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 21:06:41,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 914 transitions. [2022-03-20 21:06:41,504 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 914 transitions. Word has length 127 [2022-03-20 21:06:41,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:41,504 INFO L478 AbstractCegarLoop]: Abstraction has 672 states and 914 transitions. [2022-03-20 21:06:41,504 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 21:06:41,504 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 914 transitions. [2022-03-20 21:06:41,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 21:06:41,505 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:41,505 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 21:06:41,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-20 21:06:41,711 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 21:06:41,712 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:41,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:41,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1410231607, now seen corresponding path program 19 times [2022-03-20 21:06:41,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:41,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1263995030] [2022-03-20 21:06:41,723 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:41,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1410231607, now seen corresponding path program 20 times [2022-03-20 21:06:41,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:41,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004823228] [2022-03-20 21:06:41,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:41,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:41,728 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:41,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795435180] [2022-03-20 21:06:41,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:41,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:41,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:41,729 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 21:06:41,730 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 21:06:41,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:41,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:41,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 21:06:41,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:42,056 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 21:06:42,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:42,462 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 21:06:42,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:42,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004823228] [2022-03-20 21:06:42,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:42,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795435180] [2022-03-20 21:06:42,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795435180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:42,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:42,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-20 21:06:42,463 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:42,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1263995030] [2022-03-20 21:06:42,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1263995030] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:42,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:42,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 21:06:42,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981782073] [2022-03-20 21:06:42,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:42,464 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 21:06:42,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:42,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 21:06:42,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-20 21:06:42,465 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 21:06:42,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:42,843 INFO L93 Difference]: Finished difference Result 893 states and 1247 transitions. [2022-03-20 21:06:42,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 21:06:42,843 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 21:06:42,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:42,845 INFO L225 Difference]: With dead ends: 893 [2022-03-20 21:06:42,845 INFO L226 Difference]: Without dead ends: 700 [2022-03-20 21:06:42,846 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1047, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 21:06:42,850 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 199 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:42,850 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 297 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:06:42,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-03-20 21:06:42,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 690. [2022-03-20 21:06:42,975 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 21:06:42,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 936 transitions. [2022-03-20 21:06:42,976 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 936 transitions. Word has length 129 [2022-03-20 21:06:42,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:42,977 INFO L478 AbstractCegarLoop]: Abstraction has 690 states and 936 transitions. [2022-03-20 21:06:42,977 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 21:06:42,977 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 936 transitions. [2022-03-20 21:06:42,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 21:06:42,978 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:42,978 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 21:06:42,994 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 21:06:43,194 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 21:06:43,194 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:43,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:43,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1255136270, now seen corresponding path program 17 times [2022-03-20 21:06:43,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:43,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1836274757] [2022-03-20 21:06:43,195 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:43,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1255136270, now seen corresponding path program 18 times [2022-03-20 21:06:43,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:43,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174320459] [2022-03-20 21:06:43,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:43,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:43,199 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:43,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311192917] [2022-03-20 21:06:43,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:06:43,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:43,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:43,200 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 21:06:43,201 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 21:06:43,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 21:06:43,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:43,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 21:06:43,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:43,645 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 21:06:43,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:43,872 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 21:06:43,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:43,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174320459] [2022-03-20 21:06:43,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:43,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311192917] [2022-03-20 21:06:43,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311192917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:43,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:43,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-20 21:06:43,873 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:43,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1836274757] [2022-03-20 21:06:43,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1836274757] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:43,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:43,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 21:06:43,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858319905] [2022-03-20 21:06:43,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:43,873 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 21:06:43,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:43,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 21:06:43,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-20 21:06:43,874 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 21:06:44,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:44,223 INFO L93 Difference]: Finished difference Result 903 states and 1260 transitions. [2022-03-20 21:06:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 21:06:44,224 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 21:06:44,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:44,226 INFO L225 Difference]: With dead ends: 903 [2022-03-20 21:06:44,226 INFO L226 Difference]: Without dead ends: 706 [2022-03-20 21:06:44,227 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=800, Invalid=1092, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 21:06:44,227 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 187 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:44,227 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 318 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:06:44,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-03-20 21:06:44,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 706. [2022-03-20 21:06:44,364 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 21:06:44,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 952 transitions. [2022-03-20 21:06:44,365 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 952 transitions. Word has length 131 [2022-03-20 21:06:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:44,365 INFO L478 AbstractCegarLoop]: Abstraction has 706 states and 952 transitions. [2022-03-20 21:06:44,365 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 21:06:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 952 transitions. [2022-03-20 21:06:44,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 21:06:44,367 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:44,367 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 21:06:44,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-20 21:06:44,571 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 21:06:44,571 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:44,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:44,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1252937077, now seen corresponding path program 11 times [2022-03-20 21:06:44,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:44,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [3887795] [2022-03-20 21:06:44,572 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:44,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1252937077, now seen corresponding path program 12 times [2022-03-20 21:06:44,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:44,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115030969] [2022-03-20 21:06:44,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:44,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:44,576 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:44,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508557886] [2022-03-20 21:06:44,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:06:44,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:44,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:44,584 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 21:06:44,602 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 21:06:44,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 21:06:44,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:44,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 21:06:44,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:44,914 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 21:06:44,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:46,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:46,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115030969] [2022-03-20 21:06:46,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:46,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508557886] [2022-03-20 21:06:46,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508557886] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:06:46,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:06:46,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 21:06:46,828 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:46,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [3887795] [2022-03-20 21:06:46,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [3887795] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:46,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:46,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 21:06:46,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195658903] [2022-03-20 21:06:46,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:46,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 21:06:46,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:46,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 21:06:46,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=84, Unknown=1, NotChecked=0, Total=110 [2022-03-20 21:06:46,829 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 21:06:48,885 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 21:06:49,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:49,151 INFO L93 Difference]: Finished difference Result 758 states and 1028 transitions. [2022-03-20 21:06:49,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 21:06:49,152 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 21:06:49,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:49,154 INFO L225 Difference]: With dead ends: 758 [2022-03-20 21:06:49,154 INFO L226 Difference]: Without dead ends: 746 [2022-03-20 21:06:49,156 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=43, Invalid=138, Unknown=1, NotChecked=0, Total=182 [2022-03-20 21:06:49,157 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 28 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:49,157 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 285 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 118 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 21:06:49,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-03-20 21:06:49,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 683. [2022-03-20 21:06:49,290 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 21:06:49,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 912 transitions. [2022-03-20 21:06:49,291 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 912 transitions. Word has length 135 [2022-03-20 21:06:49,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:49,291 INFO L478 AbstractCegarLoop]: Abstraction has 683 states and 912 transitions. [2022-03-20 21:06:49,291 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 21:06:49,291 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 912 transitions. [2022-03-20 21:06:49,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 21:06:49,293 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:49,293 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 21:06:49,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-20 21:06:49,496 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 21:06:49,496 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:49,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:49,497 INFO L85 PathProgramCache]: Analyzing trace with hash 200539575, now seen corresponding path program 13 times [2022-03-20 21:06:49,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:49,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [417033789] [2022-03-20 21:06:49,497 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:49,497 INFO L85 PathProgramCache]: Analyzing trace with hash 200539575, now seen corresponding path program 14 times [2022-03-20 21:06:49,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:49,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498207013] [2022-03-20 21:06:49,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:49,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:49,504 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:49,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072220809] [2022-03-20 21:06:49,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:49,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:49,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:49,505 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 21:06:49,507 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 21:06:49,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:49,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:49,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 21:06:49,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:49,870 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 21:06:49,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:50,307 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 21:06:50,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:50,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498207013] [2022-03-20 21:06:50,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:50,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072220809] [2022-03-20 21:06:50,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072220809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:50,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:50,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-20 21:06:50,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:50,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [417033789] [2022-03-20 21:06:50,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [417033789] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:50,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:50,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 21:06:50,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540491976] [2022-03-20 21:06:50,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:50,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 21:06:50,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:50,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 21:06:50,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 21:06:50,309 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 21:06:50,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:50,742 INFO L93 Difference]: Finished difference Result 734 states and 982 transitions. [2022-03-20 21:06:50,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 21:06:50,742 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 21:06:50,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:50,744 INFO L225 Difference]: With dead ends: 734 [2022-03-20 21:06:50,744 INFO L226 Difference]: Without dead ends: 729 [2022-03-20 21:06:50,745 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=834, Invalid=1146, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 21:06:50,745 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 232 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:50,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 335 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:06:50,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-03-20 21:06:50,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 707. [2022-03-20 21:06:50,873 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 21:06:50,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 950 transitions. [2022-03-20 21:06:50,875 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 950 transitions. Word has length 135 [2022-03-20 21:06:50,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:50,875 INFO L478 AbstractCegarLoop]: Abstraction has 707 states and 950 transitions. [2022-03-20 21:06:50,875 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 21:06:50,875 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 950 transitions. [2022-03-20 21:06:50,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-20 21:06:50,876 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:50,877 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 21:06:50,892 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 21:06:51,086 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 21:06:51,086 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:51,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:51,087 INFO L85 PathProgramCache]: Analyzing trace with hash -972958086, now seen corresponding path program 21 times [2022-03-20 21:06:51,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:51,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [337404524] [2022-03-20 21:06:51,087 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:51,087 INFO L85 PathProgramCache]: Analyzing trace with hash -972958086, now seen corresponding path program 22 times [2022-03-20 21:06:51,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:51,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909933286] [2022-03-20 21:06:51,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:51,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:51,092 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:51,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746404991] [2022-03-20 21:06:51,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:06:51,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:51,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:51,093 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 21:06:51,094 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 21:06:51,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:06:51,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:51,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 21:06:51,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:52,483 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 21:06:52,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:53,118 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 21:06:53,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:53,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909933286] [2022-03-20 21:06:53,118 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:53,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746404991] [2022-03-20 21:06:53,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746404991] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:53,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:53,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-03-20 21:06:53,119 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:53,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [337404524] [2022-03-20 21:06:53,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [337404524] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:53,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:53,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 21:06:53,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688341076] [2022-03-20 21:06:53,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:53,119 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 21:06:53,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:53,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 21:06:53,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-03-20 21:06:53,120 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 21:06:55,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:06:55,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:55,693 INFO L93 Difference]: Finished difference Result 964 states and 1336 transitions. [2022-03-20 21:06:55,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 21:06:55,693 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 21:06:55,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:55,696 INFO L225 Difference]: With dead ends: 964 [2022-03-20 21:06:55,696 INFO L226 Difference]: Without dead ends: 851 [2022-03-20 21:06:55,697 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-03-20 21:06:55,697 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 29 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:55,697 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 629 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 1 Unknown, 188 Unchecked, 2.0s Time] [2022-03-20 21:06:55,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-03-20 21:06:55,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 707. [2022-03-20 21:06:55,837 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 21:06:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 950 transitions. [2022-03-20 21:06:55,839 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 950 transitions. Word has length 137 [2022-03-20 21:06:55,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:55,839 INFO L478 AbstractCegarLoop]: Abstraction has 707 states and 950 transitions. [2022-03-20 21:06:55,839 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 21:06:55,839 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 950 transitions. [2022-03-20 21:06:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-20 21:06:55,841 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:55,841 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 21:06:55,857 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 21:06:56,056 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 21:06:56,057 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:56,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:56,057 INFO L85 PathProgramCache]: Analyzing trace with hash -134259028, now seen corresponding path program 23 times [2022-03-20 21:06:56,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:56,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1004239272] [2022-03-20 21:06:56,057 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:56,057 INFO L85 PathProgramCache]: Analyzing trace with hash -134259028, now seen corresponding path program 24 times [2022-03-20 21:06:56,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:56,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494646143] [2022-03-20 21:06:56,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:56,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:56,062 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:56,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898996757] [2022-03-20 21:06:56,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:06:56,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:56,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:56,063 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 21:06:56,064 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 21:06:56,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 21:06:56,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:56,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 21:06:56,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:56,533 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 21:06:56,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:57,001 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 21:06:57,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:57,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494646143] [2022-03-20 21:06:57,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:57,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898996757] [2022-03-20 21:06:57,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898996757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:57,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:57,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-03-20 21:06:57,001 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:57,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1004239272] [2022-03-20 21:06:57,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1004239272] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:57,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:57,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 21:06:57,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51897448] [2022-03-20 21:06:57,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:57,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 21:06:57,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:57,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 21:06:57,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 21:06:57,003 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 21:06:57,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:57,521 INFO L93 Difference]: Finished difference Result 807 states and 1089 transitions. [2022-03-20 21:06:57,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 21:06:57,522 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 21:06:57,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:57,524 INFO L225 Difference]: With dead ends: 807 [2022-03-20 21:06:57,524 INFO L226 Difference]: Without dead ends: 802 [2022-03-20 21:06:57,525 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=953, Invalid=1303, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 21:06:57,525 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 290 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:57,525 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 346 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:06:57,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-03-20 21:06:57,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 775. [2022-03-20 21:06:57,682 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 21:06:57,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1047 transitions. [2022-03-20 21:06:57,684 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1047 transitions. Word has length 137 [2022-03-20 21:06:57,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:57,684 INFO L478 AbstractCegarLoop]: Abstraction has 775 states and 1047 transitions. [2022-03-20 21:06:57,684 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 21:06:57,684 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1047 transitions. [2022-03-20 21:06:57,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-20 21:06:57,686 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:57,686 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 21:06:57,708 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 21:06:57,890 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 21:06:57,890 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:57,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:57,890 INFO L85 PathProgramCache]: Analyzing trace with hash -895861967, now seen corresponding path program 19 times [2022-03-20 21:06:57,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:57,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1118892335] [2022-03-20 21:06:57,891 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:57,891 INFO L85 PathProgramCache]: Analyzing trace with hash -895861967, now seen corresponding path program 20 times [2022-03-20 21:06:57,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:57,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785987897] [2022-03-20 21:06:57,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:57,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:57,895 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:57,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993345228] [2022-03-20 21:06:57,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:57,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:57,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:57,897 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 21:06:57,898 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 21:06:57,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:57,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:57,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 21:06:57,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:58,129 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 21:06:58,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:58,560 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 21:06:58,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:58,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785987897] [2022-03-20 21:06:58,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:58,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993345228] [2022-03-20 21:06:58,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993345228] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:58,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:58,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-20 21:06:58,561 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:58,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1118892335] [2022-03-20 21:06:58,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1118892335] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:58,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:58,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 21:06:58,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141850141] [2022-03-20 21:06:58,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:58,562 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 21:06:58,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:58,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 21:06:58,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 21:06:58,563 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 21:06:59,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:59,012 INFO L93 Difference]: Finished difference Result 945 states and 1302 transitions. [2022-03-20 21:06:59,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 21:06:59,012 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 21:06:59,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:59,016 INFO L225 Difference]: With dead ends: 945 [2022-03-20 21:06:59,016 INFO L226 Difference]: Without dead ends: 775 [2022-03-20 21:06:59,017 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=917, Invalid=1245, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 21:06:59,018 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 189 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:59,018 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 347 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:06:59,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-03-20 21:06:59,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 775. [2022-03-20 21:06:59,190 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 21:06:59,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1041 transitions. [2022-03-20 21:06:59,192 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1041 transitions. Word has length 139 [2022-03-20 21:06:59,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:59,192 INFO L478 AbstractCegarLoop]: Abstraction has 775 states and 1041 transitions. [2022-03-20 21:06:59,192 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 21:06:59,192 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1041 transitions. [2022-03-20 21:06:59,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-20 21:06:59,194 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:59,194 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 21:06:59,220 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 21:06:59,409 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 21:06:59,411 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:59,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:59,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1908608861, now seen corresponding path program 25 times [2022-03-20 21:06:59,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:59,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2024143337] [2022-03-20 21:06:59,411 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:59,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1908608861, now seen corresponding path program 26 times [2022-03-20 21:06:59,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:59,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870437666] [2022-03-20 21:06:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:59,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:59,417 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:59,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [955686977] [2022-03-20 21:06:59,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:59,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:59,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:59,418 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 21:06:59,419 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 21:06:59,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:59,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:59,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 21:06:59,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:59,796 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 21:06:59,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:00,272 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 21:07:00,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:00,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870437666] [2022-03-20 21:07:00,272 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:00,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955686977] [2022-03-20 21:07:00,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955686977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:00,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:00,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-03-20 21:07:00,272 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:00,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2024143337] [2022-03-20 21:07:00,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2024143337] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:00,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:00,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 21:07:00,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493099432] [2022-03-20 21:07:00,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:00,273 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 21:07:00,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:00,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 21:07:00,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 21:07:00,274 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 21:07:00,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:00,714 INFO L93 Difference]: Finished difference Result 981 states and 1345 transitions. [2022-03-20 21:07:00,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 21:07:00,714 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 21:07:00,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:00,717 INFO L225 Difference]: With dead ends: 981 [2022-03-20 21:07:00,717 INFO L226 Difference]: Without dead ends: 789 [2022-03-20 21:07:00,718 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=995, Invalid=1357, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 21:07:00,718 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 208 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:00,718 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 364 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:07:00,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-03-20 21:07:00,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 778. [2022-03-20 21:07:00,884 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 21:07:00,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1041 transitions. [2022-03-20 21:07:00,887 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1041 transitions. Word has length 145 [2022-03-20 21:07:00,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:00,887 INFO L478 AbstractCegarLoop]: Abstraction has 778 states and 1041 transitions. [2022-03-20 21:07:00,887 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 21:07:00,887 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1041 transitions. [2022-03-20 21:07:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-20 21:07:00,889 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:00,889 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 21:07:00,905 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 21:07:01,104 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 21:07:01,105 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:01,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:01,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1963931820, now seen corresponding path program 21 times [2022-03-20 21:07:01,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:01,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1153806889] [2022-03-20 21:07:01,105 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:01,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1963931820, now seen corresponding path program 22 times [2022-03-20 21:07:01,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:01,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733114378] [2022-03-20 21:07:01,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:01,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:01,110 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:01,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672120464] [2022-03-20 21:07:01,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:07:01,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:01,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:01,111 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 21:07:01,112 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 21:07:01,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:07:01,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:01,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 21:07:01,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:01,487 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 21:07:01,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:01,957 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 21:07:01,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:01,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733114378] [2022-03-20 21:07:01,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:01,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672120464] [2022-03-20 21:07:01,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672120464] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:01,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:01,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-03-20 21:07:01,958 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:01,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1153806889] [2022-03-20 21:07:01,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1153806889] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:01,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:01,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 21:07:01,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577789707] [2022-03-20 21:07:01,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:01,958 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 21:07:01,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:01,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 21:07:01,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 21:07:01,959 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 21:07:02,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:02,467 INFO L93 Difference]: Finished difference Result 965 states and 1319 transitions. [2022-03-20 21:07:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 21:07:02,468 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 21:07:02,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:02,470 INFO L225 Difference]: With dead ends: 965 [2022-03-20 21:07:02,470 INFO L226 Difference]: Without dead ends: 795 [2022-03-20 21:07:02,471 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1042, Invalid=1408, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 21:07:02,471 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 222 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:02,471 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 356 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:07:02,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-03-20 21:07:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 795. [2022-03-20 21:07:02,638 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 21:07:02,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1058 transitions. [2022-03-20 21:07:02,639 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1058 transitions. Word has length 147 [2022-03-20 21:07:02,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:02,640 INFO L478 AbstractCegarLoop]: Abstraction has 795 states and 1058 transitions. [2022-03-20 21:07:02,640 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 21:07:02,640 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1058 transitions. [2022-03-20 21:07:02,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-20 21:07:02,641 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:02,641 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 21:07:02,658 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 21:07:02,855 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 21:07:02,855 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:02,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:02,856 INFO L85 PathProgramCache]: Analyzing trace with hash -913503479, now seen corresponding path program 15 times [2022-03-20 21:07:02,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:02,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1873540731] [2022-03-20 21:07:02,856 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:02,856 INFO L85 PathProgramCache]: Analyzing trace with hash -913503479, now seen corresponding path program 16 times [2022-03-20 21:07:02,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:02,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540531011] [2022-03-20 21:07:02,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:02,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:02,861 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:02,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871635946] [2022-03-20 21:07:02,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:07:02,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:02,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:02,864 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 21:07:02,865 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 21:07:02,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:07:02,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:02,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 21:07:02,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:03,283 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 21:07:03,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:03,764 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 21:07:03,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:03,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540531011] [2022-03-20 21:07:03,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:03,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871635946] [2022-03-20 21:07:03,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871635946] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:03,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:03,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-03-20 21:07:03,765 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:03,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1873540731] [2022-03-20 21:07:03,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1873540731] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:03,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:03,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 21:07:03,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635921127] [2022-03-20 21:07:03,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:03,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 21:07:03,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:03,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 21:07:03,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 21:07:03,766 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 21:07:04,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:04,295 INFO L93 Difference]: Finished difference Result 846 states and 1128 transitions. [2022-03-20 21:07:04,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 21:07:04,295 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 21:07:04,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:04,298 INFO L225 Difference]: With dead ends: 846 [2022-03-20 21:07:04,298 INFO L226 Difference]: Without dead ends: 841 [2022-03-20 21:07:04,298 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1080, Invalid=1470, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 21:07:04,298 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 245 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:04,298 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 382 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:07:04,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-03-20 21:07:04,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 819. [2022-03-20 21:07:04,467 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 21:07:04,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1096 transitions. [2022-03-20 21:07:04,468 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1096 transitions. Word has length 151 [2022-03-20 21:07:04,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:04,469 INFO L478 AbstractCegarLoop]: Abstraction has 819 states and 1096 transitions. [2022-03-20 21:07:04,469 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 21:07:04,469 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1096 transitions. [2022-03-20 21:07:04,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-20 21:07:04,470 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:04,470 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 21:07:04,486 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 21:07:04,679 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 21:07:04,679 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:04,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:04,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1031451968, now seen corresponding path program 27 times [2022-03-20 21:07:04,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:04,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [811845324] [2022-03-20 21:07:04,680 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:04,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1031451968, now seen corresponding path program 28 times [2022-03-20 21:07:04,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:04,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807933100] [2022-03-20 21:07:04,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:04,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:04,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:04,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858424033] [2022-03-20 21:07:04,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:07:04,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:04,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:04,720 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 21:07:04,735 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 21:07:04,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:07:04,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:04,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 21:07:04,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:05,119 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 21:07:05,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:05,630 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 21:07:05,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:05,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807933100] [2022-03-20 21:07:05,630 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:05,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858424033] [2022-03-20 21:07:05,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858424033] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:05,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:05,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-03-20 21:07:05,631 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:05,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [811845324] [2022-03-20 21:07:05,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [811845324] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:05,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:05,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 21:07:05,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362427468] [2022-03-20 21:07:05,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:05,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 21:07:05,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:05,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 21:07:05,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 21:07:05,632 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 21:07:06,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:06,166 INFO L93 Difference]: Finished difference Result 1023 states and 1398 transitions. [2022-03-20 21:07:06,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 21:07:06,166 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 21:07:06,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:06,169 INFO L225 Difference]: With dead ends: 1023 [2022-03-20 21:07:06,169 INFO L226 Difference]: Without dead ends: 845 [2022-03-20 21:07:06,170 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1125, Invalid=1527, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 21:07:06,170 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 289 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:06,170 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 339 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:07:06,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-03-20 21:07:06,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 834. [2022-03-20 21:07:06,346 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 21:07:06,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1114 transitions. [2022-03-20 21:07:06,348 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1114 transitions. Word has length 153 [2022-03-20 21:07:06,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:06,348 INFO L478 AbstractCegarLoop]: Abstraction has 834 states and 1114 transitions. [2022-03-20 21:07:06,348 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 21:07:06,348 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1114 transitions. [2022-03-20 21:07:06,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 21:07:06,350 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:06,350 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 21:07:06,379 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 21:07:06,563 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 21:07:06,563 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:06,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:06,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1196851319, now seen corresponding path program 23 times [2022-03-20 21:07:06,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:06,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [821249207] [2022-03-20 21:07:06,564 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:06,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1196851319, now seen corresponding path program 24 times [2022-03-20 21:07:06,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:06,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705357796] [2022-03-20 21:07:06,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:06,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:06,570 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:06,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1000388648] [2022-03-20 21:07:06,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:07:06,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:06,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:06,572 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 21:07:06,573 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 21:07:06,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 21:07:06,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:06,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 21:07:06,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:07,145 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 21:07:07,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:07,706 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 21:07:07,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:07,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705357796] [2022-03-20 21:07:07,707 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:07,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000388648] [2022-03-20 21:07:07,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000388648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:07,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:07,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-03-20 21:07:07,707 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:07,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [821249207] [2022-03-20 21:07:07,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [821249207] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:07,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:07,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 21:07:07,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365840555] [2022-03-20 21:07:07,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:07,708 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 21:07:07,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:07,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 21:07:07,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 21:07:07,709 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 21:07:08,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:08,214 INFO L93 Difference]: Finished difference Result 1021 states and 1392 transitions. [2022-03-20 21:07:08,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 21:07:08,215 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 21:07:08,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:08,218 INFO L225 Difference]: With dead ends: 1021 [2022-03-20 21:07:08,218 INFO L226 Difference]: Without dead ends: 851 [2022-03-20 21:07:08,219 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1175, Invalid=1581, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 21:07:08,219 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 240 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:08,219 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 393 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:07:08,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-03-20 21:07:08,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 851. [2022-03-20 21:07:08,416 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 21:07:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1131 transitions. [2022-03-20 21:07:08,417 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1131 transitions. Word has length 155 [2022-03-20 21:07:08,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:08,418 INFO L478 AbstractCegarLoop]: Abstraction has 851 states and 1131 transitions. [2022-03-20 21:07:08,418 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 21:07:08,418 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1131 transitions. [2022-03-20 21:07:08,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-20 21:07:08,419 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:08,420 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 21:07:08,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-20 21:07:08,623 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 21:07:08,624 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:08,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:08,624 INFO L85 PathProgramCache]: Analyzing trace with hash -61113684, now seen corresponding path program 17 times [2022-03-20 21:07:08,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:08,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [524869050] [2022-03-20 21:07:08,625 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:08,625 INFO L85 PathProgramCache]: Analyzing trace with hash -61113684, now seen corresponding path program 18 times [2022-03-20 21:07:08,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:08,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982683517] [2022-03-20 21:07:08,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:08,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:08,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:08,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437970117] [2022-03-20 21:07:08,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:07:08,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:08,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:08,639 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 21:07:08,640 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 21:07:09,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 21:07:09,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:09,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 21:07:09,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:09,868 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 21:07:09,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:10,197 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 21:07:10,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:10,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982683517] [2022-03-20 21:07:10,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:10,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437970117] [2022-03-20 21:07:10,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437970117] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:10,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:10,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-03-20 21:07:10,198 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:10,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [524869050] [2022-03-20 21:07:10,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [524869050] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:10,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:10,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 21:07:10,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344967073] [2022-03-20 21:07:10,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:10,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 21:07:10,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:10,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 21:07:10,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 21:07:10,212 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 21:07:10,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:10,754 INFO L93 Difference]: Finished difference Result 902 states and 1201 transitions. [2022-03-20 21:07:10,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 21:07:10,755 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 21:07:10,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:10,757 INFO L225 Difference]: With dead ends: 902 [2022-03-20 21:07:10,757 INFO L226 Difference]: Without dead ends: 897 [2022-03-20 21:07:10,758 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1215, Invalid=1647, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:07:10,758 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 276 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:10,758 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 372 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:07:10,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-03-20 21:07:10,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 875. [2022-03-20 21:07:10,952 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 21:07:10,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1169 transitions. [2022-03-20 21:07:10,954 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1169 transitions. Word has length 159 [2022-03-20 21:07:10,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:10,954 INFO L478 AbstractCegarLoop]: Abstraction has 875 states and 1169 transitions. [2022-03-20 21:07:10,954 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 21:07:10,954 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1169 transitions. [2022-03-20 21:07:10,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-20 21:07:10,956 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:10,956 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 21:07:10,971 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 21:07:11,161 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 21:07:11,161 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:11,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:11,162 INFO L85 PathProgramCache]: Analyzing trace with hash -160708573, now seen corresponding path program 29 times [2022-03-20 21:07:11,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:11,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1741867587] [2022-03-20 21:07:11,162 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:11,162 INFO L85 PathProgramCache]: Analyzing trace with hash -160708573, now seen corresponding path program 30 times [2022-03-20 21:07:11,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:11,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026279690] [2022-03-20 21:07:11,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:11,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:11,167 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:11,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695633771] [2022-03-20 21:07:11,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:07:11,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:11,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:11,168 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 21:07:11,170 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 21:07:12,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 21:07:12,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:12,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 21:07:12,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:12,533 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 21:07:12,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:12,855 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 21:07:12,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:12,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026279690] [2022-03-20 21:07:12,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:12,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695633771] [2022-03-20 21:07:12,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695633771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:12,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:12,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-03-20 21:07:12,856 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:12,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1741867587] [2022-03-20 21:07:12,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1741867587] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:12,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:12,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 21:07:12,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813265384] [2022-03-20 21:07:12,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:12,856 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 21:07:12,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:12,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 21:07:12,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 21:07:12,857 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 21:07:13,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:13,460 INFO L93 Difference]: Finished difference Result 1079 states and 1471 transitions. [2022-03-20 21:07:13,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 21:07:13,460 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 21:07:13,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:13,463 INFO L225 Difference]: With dead ends: 1079 [2022-03-20 21:07:13,463 INFO L226 Difference]: Without dead ends: 901 [2022-03-20 21:07:13,464 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1263, Invalid=1707, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 21:07:13,465 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 347 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:13,465 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 365 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:07:13,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-03-20 21:07:13,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 890. [2022-03-20 21:07:13,724 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 21:07:13,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1187 transitions. [2022-03-20 21:07:13,725 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1187 transitions. Word has length 161 [2022-03-20 21:07:13,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:13,726 INFO L478 AbstractCegarLoop]: Abstraction has 890 states and 1187 transitions. [2022-03-20 21:07:13,726 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 21:07:13,726 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1187 transitions. [2022-03-20 21:07:13,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-20 21:07:13,727 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:13,728 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 21:07:13,742 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 21:07:13,932 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 21:07:13,933 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:13,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:13,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1942329766, now seen corresponding path program 25 times [2022-03-20 21:07:13,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:13,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1650490656] [2022-03-20 21:07:13,933 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:13,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1942329766, now seen corresponding path program 26 times [2022-03-20 21:07:13,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:13,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972319635] [2022-03-20 21:07:13,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:13,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:13,938 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:13,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526226146] [2022-03-20 21:07:13,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:07:13,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:13,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:13,939 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 21:07:13,940 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 21:07:14,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:07:14,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:14,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 21:07:14,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:14,383 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 21:07:14,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:14,762 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 21:07:14,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:14,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972319635] [2022-03-20 21:07:14,762 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:14,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526226146] [2022-03-20 21:07:14,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526226146] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:14,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:14,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-03-20 21:07:14,763 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:14,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1650490656] [2022-03-20 21:07:14,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1650490656] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:14,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:14,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 21:07:14,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673746736] [2022-03-20 21:07:14,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:14,775 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 21:07:14,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:14,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 21:07:14,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 21:07:14,776 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 21:07:15,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:15,281 INFO L93 Difference]: Finished difference Result 1077 states and 1465 transitions. [2022-03-20 21:07:15,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 21:07:15,281 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 21:07:15,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:15,284 INFO L225 Difference]: With dead ends: 1077 [2022-03-20 21:07:15,284 INFO L226 Difference]: Without dead ends: 907 [2022-03-20 21:07:15,285 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1316, Invalid=1764, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 21:07:15,285 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 416 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:15,285 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 353 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:07:15,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-03-20 21:07:15,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 907. [2022-03-20 21:07:15,483 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 21:07:15,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1204 transitions. [2022-03-20 21:07:15,484 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1204 transitions. Word has length 163 [2022-03-20 21:07:15,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:15,484 INFO L478 AbstractCegarLoop]: Abstraction has 907 states and 1204 transitions. [2022-03-20 21:07:15,484 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 21:07:15,484 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1204 transitions. [2022-03-20 21:07:15,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-20 21:07:15,486 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:15,486 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 21:07:15,502 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 21:07:15,702 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 21:07:15,702 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:15,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:15,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1797417137, now seen corresponding path program 19 times [2022-03-20 21:07:15,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:15,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [629779933] [2022-03-20 21:07:15,703 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:15,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1797417137, now seen corresponding path program 20 times [2022-03-20 21:07:15,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:15,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500974257] [2022-03-20 21:07:15,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:15,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:15,707 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:15,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898471200] [2022-03-20 21:07:15,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:07:15,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:15,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:15,709 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 21:07:15,709 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 21:07:15,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:07:15,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:15,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 21:07:15,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:16,119 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 21:07:16,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:16,509 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 21:07:16,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:16,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500974257] [2022-03-20 21:07:16,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:16,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898471200] [2022-03-20 21:07:16,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898471200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:16,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:16,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-03-20 21:07:16,510 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:16,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [629779933] [2022-03-20 21:07:16,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [629779933] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:16,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:16,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 21:07:16,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836637813] [2022-03-20 21:07:16,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:16,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 21:07:16,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:16,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 21:07:16,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 21:07:16,511 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 21:07:17,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:17,020 INFO L93 Difference]: Finished difference Result 958 states and 1274 transitions. [2022-03-20 21:07:17,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 21:07:17,020 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 21:07:17,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:17,029 INFO L225 Difference]: With dead ends: 958 [2022-03-20 21:07:17,029 INFO L226 Difference]: Without dead ends: 953 [2022-03-20 21:07:17,029 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1358, Invalid=1834, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 21:07:17,030 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 284 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:17,030 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 402 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:07:17,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-03-20 21:07:17,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 931. [2022-03-20 21:07:17,248 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 21:07:17,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1242 transitions. [2022-03-20 21:07:17,250 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1242 transitions. Word has length 167 [2022-03-20 21:07:17,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:17,250 INFO L478 AbstractCegarLoop]: Abstraction has 931 states and 1242 transitions. [2022-03-20 21:07:17,250 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 21:07:17,250 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1242 transitions. [2022-03-20 21:07:17,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-20 21:07:17,252 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:17,252 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 21:07:17,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-20 21:07:17,467 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 21:07:17,468 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:17,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:17,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1993951238, now seen corresponding path program 31 times [2022-03-20 21:07:17,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:17,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2093901848] [2022-03-20 21:07:17,468 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:17,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1993951238, now seen corresponding path program 32 times [2022-03-20 21:07:17,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:17,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626643734] [2022-03-20 21:07:17,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:17,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:17,473 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:17,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961022304] [2022-03-20 21:07:17,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:07:17,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:17,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:17,474 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 21:07:17,475 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 21:07:17,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:07:17,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:17,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 21:07:17,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:17,760 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 21:07:17,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:18,110 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 21:07:18,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:18,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626643734] [2022-03-20 21:07:18,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:18,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961022304] [2022-03-20 21:07:18,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961022304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:18,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:18,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-03-20 21:07:18,110 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:18,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2093901848] [2022-03-20 21:07:18,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2093901848] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:18,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:18,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 21:07:18,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570485951] [2022-03-20 21:07:18,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:18,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 21:07:18,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:18,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 21:07:18,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 21:07:18,112 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 21:07:18,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:18,611 INFO L93 Difference]: Finished difference Result 1135 states and 1544 transitions. [2022-03-20 21:07:18,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 21:07:18,611 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 21:07:18,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:18,614 INFO L225 Difference]: With dead ends: 1135 [2022-03-20 21:07:18,614 INFO L226 Difference]: Without dead ends: 957 [2022-03-20 21:07:18,615 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1409, Invalid=1897, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 21:07:18,615 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 307 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:18,615 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 391 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:07:18,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-03-20 21:07:18,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 946. [2022-03-20 21:07:18,842 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 21:07:18,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1260 transitions. [2022-03-20 21:07:18,843 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1260 transitions. Word has length 169 [2022-03-20 21:07:18,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:18,843 INFO L478 AbstractCegarLoop]: Abstraction has 946 states and 1260 transitions. [2022-03-20 21:07:18,843 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 21:07:18,843 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1260 transitions. [2022-03-20 21:07:18,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-03-20 21:07:18,845 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:18,845 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 21:07:18,862 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 21:07:19,059 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 21:07:19,059 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:19,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:19,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1121656631, now seen corresponding path program 27 times [2022-03-20 21:07:19,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:19,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1095523629] [2022-03-20 21:07:19,060 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:19,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1121656631, now seen corresponding path program 28 times [2022-03-20 21:07:19,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:19,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529302305] [2022-03-20 21:07:19,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:19,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:19,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:19,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [935971189] [2022-03-20 21:07:19,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:07:19,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:19,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:19,066 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 21:07:19,067 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 21:07:19,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:07:19,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:19,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 21:07:19,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:19,440 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 21:07:19,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:19,811 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 21:07:19,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:19,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529302305] [2022-03-20 21:07:19,811 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:19,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935971189] [2022-03-20 21:07:19,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935971189] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:19,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:19,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-03-20 21:07:19,812 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:19,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1095523629] [2022-03-20 21:07:19,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1095523629] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:19,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:19,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 21:07:19,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822886479] [2022-03-20 21:07:19,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:19,812 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 21:07:19,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:19,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 21:07:19,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 21:07:19,813 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 21:07:20,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:20,439 INFO L93 Difference]: Finished difference Result 1133 states and 1538 transitions. [2022-03-20 21:07:20,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 21:07:20,439 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 21:07:20,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:20,464 INFO L225 Difference]: With dead ends: 1133 [2022-03-20 21:07:20,464 INFO L226 Difference]: Without dead ends: 963 [2022-03-20 21:07:20,465 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1465, Invalid=1957, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 21:07:20,465 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 304 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:20,465 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 395 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:07:20,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-03-20 21:07:20,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2022-03-20 21:07:20,681 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 21:07:20,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1277 transitions. [2022-03-20 21:07:20,682 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1277 transitions. Word has length 171 [2022-03-20 21:07:20,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:20,683 INFO L478 AbstractCegarLoop]: Abstraction has 963 states and 1277 transitions. [2022-03-20 21:07:20,683 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 21:07:20,683 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1277 transitions. [2022-03-20 21:07:20,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-20 21:07:20,685 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:20,685 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 21:07:20,701 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 21:07:20,900 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 21:07:20,901 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:20,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:20,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1863737586, now seen corresponding path program 21 times [2022-03-20 21:07:20,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:20,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [136817718] [2022-03-20 21:07:20,901 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:20,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1863737586, now seen corresponding path program 22 times [2022-03-20 21:07:20,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:20,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147034945] [2022-03-20 21:07:20,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:20,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:20,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:20,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639601819] [2022-03-20 21:07:20,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:07:20,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:20,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:20,910 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 21:07:20,910 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 21:07:20,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:07:20,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:20,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 21:07:20,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:21,359 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 21:07:21,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:21,942 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 21:07:21,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:21,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147034945] [2022-03-20 21:07:21,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:21,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639601819] [2022-03-20 21:07:21,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639601819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:21,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:21,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-03-20 21:07:21,943 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:21,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [136817718] [2022-03-20 21:07:21,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [136817718] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:21,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:21,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 21:07:21,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274442188] [2022-03-20 21:07:21,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:21,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 21:07:21,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:21,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 21:07:21,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 21:07:21,944 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 21:07:22,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:22,703 INFO L93 Difference]: Finished difference Result 1014 states and 1347 transitions. [2022-03-20 21:07:22,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 21:07:22,704 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 21:07:22,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:22,711 INFO L225 Difference]: With dead ends: 1014 [2022-03-20 21:07:22,711 INFO L226 Difference]: Without dead ends: 1009 [2022-03-20 21:07:22,717 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1509, Invalid=2031, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 21:07:22,717 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 318 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:22,718 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 418 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 21:07:22,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-03-20 21:07:23,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 987. [2022-03-20 21:07:23,011 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 21:07:23,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 1315 transitions. [2022-03-20 21:07:23,012 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 1315 transitions. Word has length 175 [2022-03-20 21:07:23,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:23,013 INFO L478 AbstractCegarLoop]: Abstraction has 987 states and 1315 transitions. [2022-03-20 21:07:23,013 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 21:07:23,013 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 1315 transitions. [2022-03-20 21:07:23,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-20 21:07:23,015 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:23,015 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 21:07:23,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-20 21:07:23,228 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 21:07:23,228 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:23,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:23,228 INFO L85 PathProgramCache]: Analyzing trace with hash -743527641, now seen corresponding path program 33 times [2022-03-20 21:07:23,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:23,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1938299800] [2022-03-20 21:07:23,229 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:23,229 INFO L85 PathProgramCache]: Analyzing trace with hash -743527641, now seen corresponding path program 34 times [2022-03-20 21:07:23,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:23,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668943700] [2022-03-20 21:07:23,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:23,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:23,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:23,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247420675] [2022-03-20 21:07:23,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:07:23,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:23,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:23,235 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 21:07:23,267 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 21:07:23,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:07:23,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:23,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 21:07:23,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:23,748 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 21:07:23,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:24,406 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 21:07:24,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:24,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668943700] [2022-03-20 21:07:24,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:24,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247420675] [2022-03-20 21:07:24,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247420675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:24,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:24,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-03-20 21:07:24,407 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:24,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1938299800] [2022-03-20 21:07:24,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1938299800] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:24,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:24,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 21:07:24,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580594745] [2022-03-20 21:07:24,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:24,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 21:07:24,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:24,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 21:07:24,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 21:07:24,408 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 21:07:25,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:25,138 INFO L93 Difference]: Finished difference Result 1191 states and 1617 transitions. [2022-03-20 21:07:25,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 21:07:25,139 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 21:07:25,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:25,141 INFO L225 Difference]: With dead ends: 1191 [2022-03-20 21:07:25,141 INFO L226 Difference]: Without dead ends: 1013 [2022-03-20 21:07:25,142 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1563, Invalid=2097, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 21:07:25,142 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 312 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:25,142 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 423 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:07:25,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-03-20 21:07:25,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1002. [2022-03-20 21:07:25,397 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 21:07:25,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1333 transitions. [2022-03-20 21:07:25,398 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1333 transitions. Word has length 177 [2022-03-20 21:07:25,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:25,399 INFO L478 AbstractCegarLoop]: Abstraction has 1002 states and 1333 transitions. [2022-03-20 21:07:25,399 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 21:07:25,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1333 transitions. [2022-03-20 21:07:25,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-20 21:07:25,401 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:25,401 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 21:07:25,411 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 21:07:25,607 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 21:07:25,608 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:25,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:25,608 INFO L85 PathProgramCache]: Analyzing trace with hash 2007520492, now seen corresponding path program 29 times [2022-03-20 21:07:25,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:25,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1926866134] [2022-03-20 21:07:25,608 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:25,609 INFO L85 PathProgramCache]: Analyzing trace with hash 2007520492, now seen corresponding path program 30 times [2022-03-20 21:07:25,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:25,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120135668] [2022-03-20 21:07:25,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:25,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:25,613 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:25,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873684181] [2022-03-20 21:07:25,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:07:25,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:25,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:25,614 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 21:07:25,615 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 21:07:27,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-20 21:07:27,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:27,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 21:07:27,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:27,443 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 21:07:27,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:27,896 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 21:07:27,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:27,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120135668] [2022-03-20 21:07:27,897 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:27,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873684181] [2022-03-20 21:07:27,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873684181] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:27,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:27,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-03-20 21:07:27,897 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:27,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1926866134] [2022-03-20 21:07:27,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1926866134] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:27,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:27,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 21:07:27,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783507595] [2022-03-20 21:07:27,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:27,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 21:07:27,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:27,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 21:07:27,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 21:07:27,902 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 21:07:28,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:28,533 INFO L93 Difference]: Finished difference Result 1189 states and 1611 transitions. [2022-03-20 21:07:28,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 21:07:28,534 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 21:07:28,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:28,536 INFO L225 Difference]: With dead ends: 1189 [2022-03-20 21:07:28,536 INFO L226 Difference]: Without dead ends: 1019 [2022-03-20 21:07:28,556 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1622, Invalid=2160, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 21:07:28,557 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 399 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:28,558 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 412 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:07:28,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2022-03-20 21:07:28,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 1019. [2022-03-20 21:07:28,843 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 21:07:28,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1350 transitions. [2022-03-20 21:07:28,845 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1350 transitions. Word has length 179 [2022-03-20 21:07:28,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:28,845 INFO L478 AbstractCegarLoop]: Abstraction has 1019 states and 1350 transitions. [2022-03-20 21:07:28,845 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 21:07:28,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1350 transitions. [2022-03-20 21:07:28,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-20 21:07:28,847 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:28,848 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 21:07:28,852 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 21:07:29,052 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 21:07:29,052 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:29,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:29,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1274488939, now seen corresponding path program 23 times [2022-03-20 21:07:29,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:29,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1289710620] [2022-03-20 21:07:29,053 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:29,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1274488939, now seen corresponding path program 24 times [2022-03-20 21:07:29,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:29,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074103721] [2022-03-20 21:07:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:29,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:29,059 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:29,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320079943] [2022-03-20 21:07:29,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:07:29,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:29,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:29,060 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 21:07:29,061 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 21:07:30,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-20 21:07:30,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:30,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 21:07:30,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 40 proven. 1058 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:07:30,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 40 proven. 298 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-03-20 21:07:31,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:31,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074103721] [2022-03-20 21:07:31,144 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:31,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320079943] [2022-03-20 21:07:31,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320079943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:31,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:31,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-03-20 21:07:31,145 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:31,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1289710620] [2022-03-20 21:07:31,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1289710620] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:31,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:31,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 21:07:31,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639776469] [2022-03-20 21:07:31,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:31,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 21:07:31,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:31,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 21:07:31,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 21:07:31,146 INFO L87 Difference]: Start difference. First operand 1019 states and 1350 transitions. Second operand has 24 states, 24 states have (on average 5.5) internal successors, (132), 23 states have internal predecessors, (132), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-20 21:07:31,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:31,859 INFO L93 Difference]: Finished difference Result 1070 states and 1420 transitions. [2022-03-20 21:07:31,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 21:07:31,860 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.5) internal successors, (132), 23 states have internal predecessors, (132), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) Word has length 183 [2022-03-20 21:07:31,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:31,862 INFO L225 Difference]: With dead ends: 1070 [2022-03-20 21:07:31,862 INFO L226 Difference]: Without dead ends: 1065 [2022-03-20 21:07:31,863 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1668, Invalid=2238, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 21:07:31,863 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 356 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:31,863 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 425 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:07:31,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2022-03-20 21:07:32,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1043. [2022-03-20 21:07:32,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 777 states have (on average 1.1685971685971686) internal successors, (908), 794 states have internal predecessors, (908), 241 states have call successors, (241), 26 states have call predecessors, (241), 24 states have return successors, (239), 222 states have call predecessors, (239), 239 states have call successors, (239) [2022-03-20 21:07:32,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1388 transitions. [2022-03-20 21:07:32,105 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1388 transitions. Word has length 183 [2022-03-20 21:07:32,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:32,105 INFO L478 AbstractCegarLoop]: Abstraction has 1043 states and 1388 transitions. [2022-03-20 21:07:32,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.5) internal successors, (132), 23 states have internal predecessors, (132), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-20 21:07:32,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1388 transitions. [2022-03-20 21:07:32,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-20 21:07:32,107 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:32,107 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 9, 9, 9, 9, 8, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:07:32,112 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 21:07:32,312 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 21:07:32,313 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:32,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:32,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1136152360, now seen corresponding path program 35 times [2022-03-20 21:07:32,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:32,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1563407931] [2022-03-20 21:07:32,313 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:32,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1136152360, now seen corresponding path program 36 times [2022-03-20 21:07:32,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:32,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490750127] [2022-03-20 21:07:32,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:32,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:32,318 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:32,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804731672] [2022-03-20 21:07:32,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:07:32,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:32,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:32,319 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:07:32,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-20 21:07:33,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-20 21:07:33,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:33,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 21:07:33,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 48 proven. 1026 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:07:33,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 48 proven. 266 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-03-20 21:07:34,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:34,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490750127] [2022-03-20 21:07:34,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:34,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804731672] [2022-03-20 21:07:34,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804731672] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:34,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:34,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-03-20 21:07:34,517 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:34,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1563407931] [2022-03-20 21:07:34,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1563407931] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:34,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:34,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 21:07:34,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065099273] [2022-03-20 21:07:34,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:34,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 21:07:34,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:34,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 21:07:34,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 21:07:34,518 INFO L87 Difference]: Start difference. First operand 1043 states and 1388 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 23 states have internal predecessors, (134), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-20 21:07:35,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:35,190 INFO L93 Difference]: Finished difference Result 1247 states and 1690 transitions. [2022-03-20 21:07:35,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 21:07:35,190 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 23 states have internal predecessors, (134), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) Word has length 185 [2022-03-20 21:07:35,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:35,193 INFO L225 Difference]: With dead ends: 1247 [2022-03-20 21:07:35,193 INFO L226 Difference]: Without dead ends: 1069 [2022-03-20 21:07:35,194 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1725, Invalid=2307, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 21:07:35,194 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 463 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:35,194 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 423 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:07:35,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2022-03-20 21:07:35,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1058. [2022-03-20 21:07:35,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 792 states have (on average 1.1691919191919191) internal successors, (926), 804 states have internal predecessors, (926), 241 states have call successors, (241), 26 states have call predecessors, (241), 24 states have return successors, (239), 227 states have call predecessors, (239), 239 states have call successors, (239) [2022-03-20 21:07:35,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1406 transitions. [2022-03-20 21:07:35,456 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1406 transitions. Word has length 185 [2022-03-20 21:07:35,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:35,456 INFO L478 AbstractCegarLoop]: Abstraction has 1058 states and 1406 transitions. [2022-03-20 21:07:35,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 23 states have internal predecessors, (134), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-20 21:07:35,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1406 transitions. [2022-03-20 21:07:35,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-20 21:07:35,458 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:35,459 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 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 21:07:35,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-20 21:07:35,666 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-20 21:07:35,667 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:35,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:35,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1188230671, now seen corresponding path program 31 times [2022-03-20 21:07:35,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:35,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1236177270] [2022-03-20 21:07:35,667 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:35,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1188230671, now seen corresponding path program 32 times [2022-03-20 21:07:35,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:35,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90077888] [2022-03-20 21:07:35,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:35,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:35,684 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:35,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135430405] [2022-03-20 21:07:35,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:07:35,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:35,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:35,686 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:07:35,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-20 21:07:35,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:07:35,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:35,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 21:07:35,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 80 proven. 252 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-03-20 21:07:35,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 80 proven. 252 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-03-20 21:07:36,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:36,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90077888] [2022-03-20 21:07:36,243 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:36,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135430405] [2022-03-20 21:07:36,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135430405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:36,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:36,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-20 21:07:36,243 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:36,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1236177270] [2022-03-20 21:07:36,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1236177270] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:36,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:36,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 21:07:36,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637047115] [2022-03-20 21:07:36,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:36,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 21:07:36,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:36,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 21:07:36,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-03-20 21:07:36,244 INFO L87 Difference]: Start difference. First operand 1058 states and 1406 transitions. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 11 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2022-03-20 21:07:37,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:37,087 INFO L93 Difference]: Finished difference Result 1935 states and 2627 transitions. [2022-03-20 21:07:37,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 21:07:37,088 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 11 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) Word has length 187 [2022-03-20 21:07:37,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:37,092 INFO L225 Difference]: With dead ends: 1935 [2022-03-20 21:07:37,092 INFO L226 Difference]: Without dead ends: 1765 [2022-03-20 21:07:37,092 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-03-20 21:07:37,093 INFO L913 BasicCegarLoop]: 222 mSDtfsCounter, 99 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:37,093 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 1599 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:07:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2022-03-20 21:07:37,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1600. [2022-03-20 21:07:37,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1200 states have (on average 1.1766666666666667) internal successors, (1412), 1220 states have internal predecessors, (1412), 375 states have call successors, (375), 26 states have call predecessors, (375), 24 states have return successors, (373), 353 states have call predecessors, (373), 373 states have call successors, (373) [2022-03-20 21:07:37,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2160 transitions. [2022-03-20 21:07:37,556 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2160 transitions. Word has length 187 [2022-03-20 21:07:37,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:37,556 INFO L478 AbstractCegarLoop]: Abstraction has 1600 states and 2160 transitions. [2022-03-20 21:07:37,556 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 11 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2022-03-20 21:07:37,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2160 transitions. [2022-03-20 21:07:37,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-20 21:07:37,559 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:37,560 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 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 21:07:37,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-20 21:07:37,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-20 21:07:37,776 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:37,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:37,776 INFO L85 PathProgramCache]: Analyzing trace with hash 2070462991, now seen corresponding path program 33 times [2022-03-20 21:07:37,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:37,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [648418924] [2022-03-20 21:07:37,776 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:37,776 INFO L85 PathProgramCache]: Analyzing trace with hash 2070462991, now seen corresponding path program 34 times [2022-03-20 21:07:37,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:37,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640029535] [2022-03-20 21:07:37,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:37,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:37,781 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:37,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144335805] [2022-03-20 21:07:37,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:07:37,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:37,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:37,783 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:07:37,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-20 21:07:37,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:07:37,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:37,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 21:07:37,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 1044 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:07:38,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 284 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-03-20 21:07:39,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:39,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640029535] [2022-03-20 21:07:39,095 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:39,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144335805] [2022-03-20 21:07:39,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144335805] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:39,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:39,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-03-20 21:07:39,095 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:39,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [648418924] [2022-03-20 21:07:39,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [648418924] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:39,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:39,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 21:07:39,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866785508] [2022-03-20 21:07:39,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:39,096 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 21:07:39,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:39,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 21:07:39,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 21:07:39,097 INFO L87 Difference]: Start difference. First operand 1600 states and 2160 transitions. Second operand has 24 states, 24 states have (on average 5.666666666666667) internal successors, (136), 23 states have internal predecessors, (136), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-20 21:07:40,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:40,037 INFO L93 Difference]: Finished difference Result 1959 states and 2704 transitions. [2022-03-20 21:07:40,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 21:07:40,037 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.666666666666667) internal successors, (136), 23 states have internal predecessors, (136), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) Word has length 187 [2022-03-20 21:07:40,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:40,041 INFO L225 Difference]: With dead ends: 1959 [2022-03-20 21:07:40,041 INFO L226 Difference]: Without dead ends: 1635 [2022-03-20 21:07:40,042 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1787, Invalid=2373, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 21:07:40,042 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 377 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:40,042 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 427 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:07:40,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2022-03-20 21:07:40,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1635. [2022-03-20 21:07:40,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1235 states have (on average 1.17165991902834) internal successors, (1447), 1246 states have internal predecessors, (1447), 375 states have call successors, (375), 26 states have call predecessors, (375), 24 states have return successors, (373), 362 states have call predecessors, (373), 373 states have call successors, (373) [2022-03-20 21:07:40,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 2195 transitions. [2022-03-20 21:07:40,507 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 2195 transitions. Word has length 187 [2022-03-20 21:07:40,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:40,507 INFO L478 AbstractCegarLoop]: Abstraction has 1635 states and 2195 transitions. [2022-03-20 21:07:40,507 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.666666666666667) internal successors, (136), 23 states have internal predecessors, (136), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-20 21:07:40,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 2195 transitions. [2022-03-20 21:07:40,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-20 21:07:40,510 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:40,510 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 9, 9, 9, 9, 8, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:07:40,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-20 21:07:40,716 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-20 21:07:40,717 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:40,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:40,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1458791492, now seen corresponding path program 25 times [2022-03-20 21:07:40,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:40,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1441125328] [2022-03-20 21:07:40,717 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:40,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1458791492, now seen corresponding path program 26 times [2022-03-20 21:07:40,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:40,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955578269] [2022-03-20 21:07:40,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:40,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:40,724 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:40,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347556943] [2022-03-20 21:07:40,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:07:40,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:40,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:40,725 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:07:40,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-20 21:07:40,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:07:40,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:40,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 21:07:40,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 42 proven. 1128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:07:41,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 42 proven. 288 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-20 21:07:41,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:41,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955578269] [2022-03-20 21:07:41,999 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:41,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347556943] [2022-03-20 21:07:41,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347556943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:41,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:41,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-03-20 21:07:41,999 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:42,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1441125328] [2022-03-20 21:07:42,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1441125328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:42,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:42,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 21:07:42,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996141784] [2022-03-20 21:07:42,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:42,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 21:07:42,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:42,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 21:07:42,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 21:07:42,001 INFO L87 Difference]: Start difference. First operand 1635 states and 2195 transitions. Second operand has 25 states, 25 states have (on average 5.52) internal successors, (138), 24 states have internal predecessors, (138), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-20 21:07:42,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:42,978 INFO L93 Difference]: Finished difference Result 1727 states and 2325 transitions. [2022-03-20 21:07:42,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 21:07:42,978 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 24 states have internal predecessors, (138), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) Word has length 191 [2022-03-20 21:07:42,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:42,981 INFO L225 Difference]: With dead ends: 1727 [2022-03-20 21:07:42,981 INFO L226 Difference]: Without dead ends: 1722 [2022-03-20 21:07:42,982 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1835, Invalid=2455, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 21:07:42,982 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 402 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:42,982 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 447 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:07:42,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2022-03-20 21:07:43,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1678. [2022-03-20 21:07:43,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1251 states have (on average 1.1710631494804156) internal successors, (1465), 1283 states have internal predecessors, (1465), 401 states have call successors, (401), 27 states have call predecessors, (401), 25 states have return successors, (399), 367 states have call predecessors, (399), 399 states have call successors, (399) [2022-03-20 21:07:43,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 2265 transitions. [2022-03-20 21:07:43,450 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 2265 transitions. Word has length 191 [2022-03-20 21:07:43,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:43,450 INFO L478 AbstractCegarLoop]: Abstraction has 1678 states and 2265 transitions. [2022-03-20 21:07:43,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 24 states have internal predecessors, (138), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-20 21:07:43,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 2265 transitions. [2022-03-20 21:07:43,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-20 21:07:43,453 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:43,453 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 9, 9, 9, 9, 9, 8, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:07:43,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-20 21:07:43,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-20 21:07:43,667 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:43,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:43,668 INFO L85 PathProgramCache]: Analyzing trace with hash -715360887, now seen corresponding path program 37 times [2022-03-20 21:07:43,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:43,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [980757778] [2022-03-20 21:07:43,668 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:43,668 INFO L85 PathProgramCache]: Analyzing trace with hash -715360887, now seen corresponding path program 38 times [2022-03-20 21:07:43,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:43,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997706323] [2022-03-20 21:07:43,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:43,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:43,673 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:43,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197938711] [2022-03-20 21:07:43,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:07:43,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:43,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:43,674 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:07:43,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-20 21:07:43,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:07:43,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:43,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 21:07:43,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 78 proven. 268 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-20 21:07:44,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 66 proven. 280 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-20 21:07:44,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:44,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997706323] [2022-03-20 21:07:44,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:44,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197938711] [2022-03-20 21:07:44,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197938711] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:44,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:44,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-20 21:07:44,504 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:44,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [980757778] [2022-03-20 21:07:44,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [980757778] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:44,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:44,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 21:07:44,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132539005] [2022-03-20 21:07:44,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:44,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 21:07:44,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:44,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 21:07:44,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-20 21:07:44,505 INFO L87 Difference]: Start difference. First operand 1678 states and 2265 transitions. Second operand has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 12 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2022-03-20 21:07:45,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:45,592 INFO L93 Difference]: Finished difference Result 2621 states and 3577 transitions. [2022-03-20 21:07:45,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 21:07:45,593 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 12 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) Word has length 193 [2022-03-20 21:07:45,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:45,599 INFO L225 Difference]: With dead ends: 2621 [2022-03-20 21:07:45,599 INFO L226 Difference]: Without dead ends: 2431 [2022-03-20 21:07:45,600 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 21:07:45,601 INFO L913 BasicCegarLoop]: 148 mSDtfsCounter, 139 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:45,601 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 927 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:07:45,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2022-03-20 21:07:46,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 2102. [2022-03-20 21:07:46,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 1567 states have (on average 1.169751116783663) internal successors, (1833), 1611 states have internal predecessors, (1833), 509 states have call successors, (509), 27 states have call predecessors, (509), 25 states have return successors, (507), 463 states have call predecessors, (507), 507 states have call successors, (507) [2022-03-20 21:07:46,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 2849 transitions. [2022-03-20 21:07:46,312 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 2849 transitions. Word has length 193 [2022-03-20 21:07:46,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:46,312 INFO L478 AbstractCegarLoop]: Abstraction has 2102 states and 2849 transitions. [2022-03-20 21:07:46,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 12 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2022-03-20 21:07:46,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 2849 transitions. [2022-03-20 21:07:46,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-20 21:07:46,316 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:46,317 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 10, 10, 10, 10, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:07:46,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-20 21:07:46,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:46,519 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:46,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:46,520 INFO L85 PathProgramCache]: Analyzing trace with hash 179284923, now seen corresponding path program 39 times [2022-03-20 21:07:46,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:46,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1003237799] [2022-03-20 21:07:46,520 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:46,520 INFO L85 PathProgramCache]: Analyzing trace with hash 179284923, now seen corresponding path program 40 times [2022-03-20 21:07:46,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:46,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373136463] [2022-03-20 21:07:46,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:46,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:46,530 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:46,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796531388] [2022-03-20 21:07:46,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:07:46,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:46,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:46,531 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:07:46,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-20 21:07:46,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:07:46,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:46,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 21:07:46,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 1142 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:07:46,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 302 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-20 21:07:47,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:47,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373136463] [2022-03-20 21:07:47,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:47,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796531388] [2022-03-20 21:07:47,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796531388] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:47,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:47,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-03-20 21:07:47,626 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:47,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1003237799] [2022-03-20 21:07:47,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1003237799] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:47,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:47,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 21:07:47,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896274104] [2022-03-20 21:07:47,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:47,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 21:07:47,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:47,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 21:07:47,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 21:07:47,629 INFO L87 Difference]: Start difference. First operand 2102 states and 2849 transitions. Second operand has 25 states, 25 states have (on average 5.6) internal successors, (140), 24 states have internal predecessors, (140), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-20 21:07:48,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:48,730 INFO L93 Difference]: Finished difference Result 2602 states and 3604 transitions. [2022-03-20 21:07:48,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 21:07:48,731 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 24 states have internal predecessors, (140), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) Word has length 193 [2022-03-20 21:07:48,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:48,735 INFO L225 Difference]: With dead ends: 2602 [2022-03-20 21:07:48,735 INFO L226 Difference]: Without dead ends: 2174 [2022-03-20 21:07:48,736 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1895, Invalid=2527, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 21:07:48,736 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 453 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:48,736 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 425 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:07:48,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2022-03-20 21:07:49,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 2144. [2022-03-20 21:07:49,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 1609 states have (on average 1.170913610938471) internal successors, (1884), 1637 states have internal predecessors, (1884), 509 states have call successors, (509), 27 states have call predecessors, (509), 25 states have return successors, (507), 479 states have call predecessors, (507), 507 states have call successors, (507) [2022-03-20 21:07:49,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 2900 transitions. [2022-03-20 21:07:49,395 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 2900 transitions. Word has length 193 [2022-03-20 21:07:49,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:49,395 INFO L478 AbstractCegarLoop]: Abstraction has 2144 states and 2900 transitions. [2022-03-20 21:07:49,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 24 states have internal predecessors, (140), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-20 21:07:49,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 2900 transitions. [2022-03-20 21:07:49,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-03-20 21:07:49,400 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:49,400 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 12, 11, 11, 11, 8, 7, 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 21:07:49,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-20 21:07:49,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:49,616 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:49,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:49,625 INFO L85 PathProgramCache]: Analyzing trace with hash -214855630, now seen corresponding path program 35 times [2022-03-20 21:07:49,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:49,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [498659587] [2022-03-20 21:07:49,625 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:49,626 INFO L85 PathProgramCache]: Analyzing trace with hash -214855630, now seen corresponding path program 36 times [2022-03-20 21:07:49,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:49,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469533284] [2022-03-20 21:07:49,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:49,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:49,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:49,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133880511] [2022-03-20 21:07:49,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:07:49,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:49,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:49,631 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:07:49,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-20 21:07:52,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-20 21:07:52,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:52,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 21:07:52,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 84 proven. 292 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2022-03-20 21:07:53,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 84 proven. 292 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2022-03-20 21:07:53,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:53,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469533284] [2022-03-20 21:07:53,269 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:53,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133880511] [2022-03-20 21:07:53,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133880511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:53,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:53,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2022-03-20 21:07:53,269 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:53,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [498659587] [2022-03-20 21:07:53,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [498659587] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:53,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:53,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 21:07:53,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652956444] [2022-03-20 21:07:53,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:53,270 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 21:07:53,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:53,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 21:07:53,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-03-20 21:07:53,270 INFO L87 Difference]: Start difference. First operand 2144 states and 2900 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 11 states have call predecessors, (21), 11 states have call successors, (21) [2022-03-20 21:07:54,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:54,786 INFO L93 Difference]: Finished difference Result 2646 states and 3588 transitions. [2022-03-20 21:07:54,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 21:07:54,786 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 11 states have call predecessors, (21), 11 states have call successors, (21) Word has length 195 [2022-03-20 21:07:54,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:54,791 INFO L225 Difference]: With dead ends: 2646 [2022-03-20 21:07:54,791 INFO L226 Difference]: Without dead ends: 2516 [2022-03-20 21:07:54,792 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 371 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-03-20 21:07:54,792 INFO L913 BasicCegarLoop]: 247 mSDtfsCounter, 144 mSDsluCounter, 1659 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1906 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:54,792 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1906 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 21:07:54,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2022-03-20 21:07:55,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 2351. [2022-03-20 21:07:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 1766 states have (on average 1.1766704416761042) internal successors, (2078), 1797 states have internal predecessors, (2078), 559 states have call successors, (559), 27 states have call predecessors, (559), 25 states have return successors, (557), 526 states have call predecessors, (557), 557 states have call successors, (557) [2022-03-20 21:07:55,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 3194 transitions. [2022-03-20 21:07:55,600 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 3194 transitions. Word has length 195 [2022-03-20 21:07:55,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:55,600 INFO L478 AbstractCegarLoop]: Abstraction has 2351 states and 3194 transitions. [2022-03-20 21:07:55,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 11 states have call predecessors, (21), 11 states have call successors, (21) [2022-03-20 21:07:55,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 3194 transitions. [2022-03-20 21:07:55,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-03-20 21:07:55,604 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:55,604 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 12, 11, 11, 11, 8, 7, 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 21:07:55,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-20 21:07:55,809 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:55,809 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:55,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:55,809 INFO L85 PathProgramCache]: Analyzing trace with hash 667376690, now seen corresponding path program 37 times [2022-03-20 21:07:55,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:55,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1665888173] [2022-03-20 21:07:55,810 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:55,810 INFO L85 PathProgramCache]: Analyzing trace with hash 667376690, now seen corresponding path program 38 times [2022-03-20 21:07:55,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:55,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981524715] [2022-03-20 21:07:55,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:55,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:55,814 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:55,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062208542] [2022-03-20 21:07:55,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:07:55,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:55,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:55,825 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:07:55,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-20 21:07:55,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:07:55,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:55,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 21:07:55,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 62 proven. 1166 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:07:56,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 62 proven. 326 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-20 21:07:56,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:56,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981524715] [2022-03-20 21:07:56,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:56,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062208542] [2022-03-20 21:07:56,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062208542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:56,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:56,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-03-20 21:07:56,774 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:56,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1665888173] [2022-03-20 21:07:56,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1665888173] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:56,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:56,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 21:07:56,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211501461] [2022-03-20 21:07:56,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:56,775 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 21:07:56,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:56,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 21:07:56,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 21:07:56,776 INFO L87 Difference]: Start difference. First operand 2351 states and 3194 transitions. Second operand has 25 states, 25 states have (on average 5.68) internal successors, (142), 24 states have internal predecessors, (142), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-20 21:07:58,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:58,019 INFO L93 Difference]: Finished difference Result 2915 states and 4055 transitions. [2022-03-20 21:07:58,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 21:07:58,019 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.68) internal successors, (142), 24 states have internal predecessors, (142), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) Word has length 195 [2022-03-20 21:07:58,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:58,024 INFO L225 Difference]: With dead ends: 2915 [2022-03-20 21:07:58,024 INFO L226 Difference]: Without dead ends: 2408 [2022-03-20 21:07:58,026 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1960, Invalid=2596, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 21:07:58,026 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 399 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:58,026 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 437 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:07:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2022-03-20 21:07:58,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2386. [2022-03-20 21:07:58,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2386 states, 1806 states have (on average 1.172203765227021) internal successors, (2117), 1822 states have internal predecessors, (2117), 554 states have call successors, (554), 27 states have call predecessors, (554), 25 states have return successors, (552), 536 states have call predecessors, (552), 552 states have call successors, (552) [2022-03-20 21:07:58,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2386 states to 2386 states and 3223 transitions. [2022-03-20 21:07:58,864 INFO L78 Accepts]: Start accepts. Automaton has 2386 states and 3223 transitions. Word has length 195 [2022-03-20 21:07:58,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:58,865 INFO L478 AbstractCegarLoop]: Abstraction has 2386 states and 3223 transitions. [2022-03-20 21:07:58,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.68) internal successors, (142), 24 states have internal predecessors, (142), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-20 21:07:58,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2386 states and 3223 transitions. [2022-03-20 21:07:58,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-03-20 21:07:58,868 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:58,868 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 10, 10, 10, 10, 8, 8, 8, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:07:58,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-20 21:07:59,073 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-03-20 21:07:59,073 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:59,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:59,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1172412185, now seen corresponding path program 27 times [2022-03-20 21:07:59,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:59,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [862781087] [2022-03-20 21:07:59,074 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:59,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1172412185, now seen corresponding path program 28 times [2022-03-20 21:07:59,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:59,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028797752] [2022-03-20 21:07:59,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:59,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:59,084 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:59,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691610557] [2022-03-20 21:07:59,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:07:59,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:59,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:59,087 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:07:59,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-20 21:07:59,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:07:59,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:59,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 21:07:59,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 1248 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:07:59,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 324 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-03-20 21:08:00,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:00,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028797752] [2022-03-20 21:08:00,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:00,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691610557] [2022-03-20 21:08:00,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691610557] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:00,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:00,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-03-20 21:08:00,173 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:00,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [862781087] [2022-03-20 21:08:00,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [862781087] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:00,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:00,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 21:08:00,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875722711] [2022-03-20 21:08:00,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:00,173 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 21:08:00,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:00,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 21:08:00,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 21:08:00,174 INFO L87 Difference]: Start difference. First operand 2386 states and 3223 transitions. Second operand has 26 states, 26 states have (on average 5.538461538461538) internal successors, (144), 25 states have internal predecessors, (144), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-20 21:08:01,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:01,524 INFO L93 Difference]: Finished difference Result 2530 states and 3429 transitions. [2022-03-20 21:08:01,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 21:08:01,525 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.538461538461538) internal successors, (144), 25 states have internal predecessors, (144), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) Word has length 199 [2022-03-20 21:08:01,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:01,553 INFO L225 Difference]: With dead ends: 2530 [2022-03-20 21:08:01,553 INFO L226 Difference]: Without dead ends: 2525 [2022-03-20 21:08:01,554 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2010, Invalid=2682, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 21:08:01,554 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 400 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:01,554 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 457 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:08:01,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2022-03-20 21:08:02,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 2454. [2022-03-20 21:08:02,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2454 states, 1831 states have (on average 1.1714909885308575) internal successors, (2145), 1881 states have internal predecessors, (2145), 596 states have call successors, (596), 28 states have call predecessors, (596), 26 states have return successors, (594), 544 states have call predecessors, (594), 594 states have call successors, (594) [2022-03-20 21:08:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2454 states to 2454 states and 3335 transitions. [2022-03-20 21:08:02,476 INFO L78 Accepts]: Start accepts. Automaton has 2454 states and 3335 transitions. Word has length 199 [2022-03-20 21:08:02,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:02,477 INFO L478 AbstractCegarLoop]: Abstraction has 2454 states and 3335 transitions. [2022-03-20 21:08:02,477 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.538461538461538) internal successors, (144), 25 states have internal predecessors, (144), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-20 21:08:02,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2454 states and 3335 transitions. [2022-03-20 21:08:02,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-03-20 21:08:02,480 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:02,481 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 11, 11, 11, 11, 8, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:02,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-20 21:08:02,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:02,687 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:02,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:02,687 INFO L85 PathProgramCache]: Analyzing trace with hash 866967454, now seen corresponding path program 41 times [2022-03-20 21:08:02,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:02,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1018000156] [2022-03-20 21:08:02,688 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:02,688 INFO L85 PathProgramCache]: Analyzing trace with hash 866967454, now seen corresponding path program 42 times [2022-03-20 21:08:02,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:02,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133704623] [2022-03-20 21:08:02,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:02,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:02,693 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:02,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182171775] [2022-03-20 21:08:02,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:08:02,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:02,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:02,694 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:08:02,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process