/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/theatreSquare.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 13:29:00,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 13:29:00,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 13:29:00,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 13:29:00,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 13:29:00,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 13:29:00,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 13:29:00,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 13:29:00,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 13:29:00,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 13:29:00,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 13:29:00,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 13:29:00,712 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 13:29:00,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 13:29:00,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 13:29:00,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 13:29:00,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 13:29:00,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 13:29:00,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 13:29:00,728 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 13:29:00,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 13:29:00,730 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 13:29:00,738 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 13:29:00,739 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 13:29:00,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 13:29:00,740 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 13:29:00,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 13:29:00,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 13:29:00,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 13:29:00,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 13:29:00,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 13:29:00,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 13:29:00,741 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 13:29:00,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 13:29:00,741 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 13:29:00,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 13:29:00,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 13:29:00,742 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 13:29:00,742 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 13:29:00,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 13:29:00,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:29:00,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 13:29:00,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 13:29:00,742 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 13:29:00,743 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 13:29:00,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 13:29:00,743 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 13:29:00,743 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 13:29:00,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 13:29:00,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 13:29:00,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 13:29:00,976 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 13:29:00,976 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 13:29:00,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-03-20 13:29:01,039 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7753740b4/519f2e3c8ddf42c4b12f2977b44cbc5d/FLAGc55a48983 [2022-03-20 13:29:01,429 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 13:29:01,430 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-03-20 13:29:01,439 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7753740b4/519f2e3c8ddf42c4b12f2977b44cbc5d/FLAGc55a48983 [2022-03-20 13:29:01,842 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7753740b4/519f2e3c8ddf42c4b12f2977b44cbc5d [2022-03-20 13:29:01,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 13:29:01,845 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 13:29:01,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 13:29:01,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 13:29:01,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 13:29:01,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:29:01" (1/1) ... [2022-03-20 13:29:01,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@511563e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:29:01, skipping insertion in model container [2022-03-20 13:29:01,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:29:01" (1/1) ... [2022-03-20 13:29:01,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 13:29:01,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 13:29:02,002 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c[370,383] [2022-03-20 13:29:02,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:29:02,025 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 13:29:02,034 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c[370,383] [2022-03-20 13:29:02,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:29:02,053 INFO L208 MainTranslator]: Completed translation [2022-03-20 13:29:02,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:29:02 WrapperNode [2022-03-20 13:29:02,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 13:29:02,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 13:29:02,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 13:29:02,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 13:29:02,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:29:02" (1/1) ... [2022-03-20 13:29:02,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:29:02" (1/1) ... [2022-03-20 13:29:02,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:29:02" (1/1) ... [2022-03-20 13:29:02,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:29:02" (1/1) ... [2022-03-20 13:29:02,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:29:02" (1/1) ... [2022-03-20 13:29:02,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:29:02" (1/1) ... [2022-03-20 13:29:02,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:29:02" (1/1) ... [2022-03-20 13:29:02,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 13:29:02,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 13:29:02,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 13:29:02,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 13:29:02,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:29:02" (1/1) ... [2022-03-20 13:29:02,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:29:02,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:02,110 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 13:29:02,128 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 13:29:02,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 13:29:02,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 13:29:02,142 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 13:29:02,142 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 13:29:02,142 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2022-03-20 13:29:02,142 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2022-03-20 13:29:02,146 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 13:29:02,146 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 13:29:02,146 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 13:29:02,146 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 13:29:02,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 13:29:02,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 13:29:02,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 13:29:02,147 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2022-03-20 13:29:02,147 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2022-03-20 13:29:02,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 13:29:02,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 13:29:02,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 13:29:02,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 13:29:02,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 13:29:02,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 13:29:02,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 13:29:02,219 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 13:29:02,220 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 13:29:02,373 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 13:29:02,381 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 13:29:02,381 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-03-20 13:29:02,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:29:02 BoogieIcfgContainer [2022-03-20 13:29:02,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 13:29:02,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 13:29:02,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 13:29:02,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 13:29:02,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 01:29:01" (1/3) ... [2022-03-20 13:29:02,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@189a003b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:29:02, skipping insertion in model container [2022-03-20 13:29:02,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:29:02" (2/3) ... [2022-03-20 13:29:02,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@189a003b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:29:02, skipping insertion in model container [2022-03-20 13:29:02,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:29:02" (3/3) ... [2022-03-20 13:29:02,390 INFO L111 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2022-03-20 13:29:02,393 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 13:29:02,393 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 13:29:02,426 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 13:29:02,432 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 13:29:02,432 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 13:29:02,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 13:29:02,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 13:29:02,449 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:02,450 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:02,450 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:02,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:02,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1554304209, now seen corresponding path program 1 times [2022-03-20 13:29:02,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:02,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1521164727] [2022-03-20 13:29:02,470 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:29:02,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1554304209, now seen corresponding path program 2 times [2022-03-20 13:29:02,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:02,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219856018] [2022-03-20 13:29:02,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:02,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:02,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:29:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:29:02,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:02,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219856018] [2022-03-20 13:29:02,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219856018] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:02,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:02,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:29:02,695 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:02,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1521164727] [2022-03-20 13:29:02,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1521164727] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:02,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:02,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:29:02,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707475705] [2022-03-20 13:29:02,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:02,702 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 13:29:02,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:02,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 13:29:02,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:29:02,730 INFO L87 Difference]: Start difference. First operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:29:02,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:02,953 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-03-20 13:29:02,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 13:29:02,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 13:29:02,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:02,964 INFO L225 Difference]: With dead ends: 76 [2022-03-20 13:29:02,964 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 13:29:02,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 13:29:02,971 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 46 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:02,972 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 61 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:29:02,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 13:29:03,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 13:29:03,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:29:03,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-03-20 13:29:03,009 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2022-03-20 13:29:03,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:03,010 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-03-20 13:29:03,010 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:29:03,010 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-03-20 13:29:03,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 13:29:03,012 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:03,012 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:03,012 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 13:29:03,013 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:03,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:03,015 INFO L85 PathProgramCache]: Analyzing trace with hash 362112746, now seen corresponding path program 1 times [2022-03-20 13:29:03,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:03,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [293992754] [2022-03-20 13:29:03,019 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:29:03,019 INFO L85 PathProgramCache]: Analyzing trace with hash 362112746, now seen corresponding path program 2 times [2022-03-20 13:29:03,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:03,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287280608] [2022-03-20 13:29:03,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:03,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:03,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:29:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:03,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:29:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:03,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 13:29:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:29:03,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:03,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287280608] [2022-03-20 13:29:03,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287280608] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:03,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:03,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 13:29:03,312 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:03,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [293992754] [2022-03-20 13:29:03,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [293992754] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:03,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:03,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 13:29:03,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124951856] [2022-03-20 13:29:03,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:03,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 13:29:03,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:03,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 13:29:03,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-03-20 13:29:03,318 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:29:03,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:03,679 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-03-20 13:29:03,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 13:29:03,684 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-03-20 13:29:03,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:03,695 INFO L225 Difference]: With dead ends: 50 [2022-03-20 13:29:03,696 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 13:29:03,696 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-20 13:29:03,697 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:03,698 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 80 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:29:03,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 13:29:03,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-03-20 13:29:03,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 13:29:03,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-03-20 13:29:03,710 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 31 [2022-03-20 13:29:03,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:03,710 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-03-20 13:29:03,710 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:29:03,710 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-03-20 13:29:03,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 13:29:03,715 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:03,715 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:03,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 13:29:03,725 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:03,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:03,725 INFO L85 PathProgramCache]: Analyzing trace with hash -310269904, now seen corresponding path program 1 times [2022-03-20 13:29:03,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:03,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [178400308] [2022-03-20 13:29:03,866 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:29:03,867 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:03,868 INFO L85 PathProgramCache]: Analyzing trace with hash 470809425, now seen corresponding path program 1 times [2022-03-20 13:29:03,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:03,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529386274] [2022-03-20 13:29:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:03,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:03,882 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:29:03,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28909275] [2022-03-20 13:29:03,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:03,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:03,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:03,884 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 13:29:03,893 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 13:29:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:03,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 13:29:03,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:29:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:29:04,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:29:04,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:04,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529386274] [2022-03-20 13:29:04,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:29:04,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28909275] [2022-03-20 13:29:04,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28909275] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:04,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:04,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:29:04,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:04,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [178400308] [2022-03-20 13:29:04,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [178400308] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:04,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:04,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 13:29:04,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364589060] [2022-03-20 13:29:04,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:04,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 13:29:04,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:04,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 13:29:04,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-20 13:29:04,141 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:29:04,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:04,198 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2022-03-20 13:29:04,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:29:04,199 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-03-20 13:29:04,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:04,199 INFO L225 Difference]: With dead ends: 75 [2022-03-20 13:29:04,200 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 13:29:04,200 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-03-20 13:29:04,201 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:04,201 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 185 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:29:04,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 13:29:04,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-20 13:29:04,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 13:29:04,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-03-20 13:29:04,210 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 32 [2022-03-20 13:29:04,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:04,210 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-03-20 13:29:04,210 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:29:04,210 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-03-20 13:29:04,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 13:29:04,211 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:04,211 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:04,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 13:29:04,412 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:04,412 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:04,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:04,413 INFO L85 PathProgramCache]: Analyzing trace with hash 440255005, now seen corresponding path program 1 times [2022-03-20 13:29:04,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:04,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [4341274] [2022-03-20 13:29:04,485 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:29:04,486 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:04,487 INFO L85 PathProgramCache]: Analyzing trace with hash 449898846, now seen corresponding path program 1 times [2022-03-20 13:29:04,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:04,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452131158] [2022-03-20 13:29:04,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:04,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:04,497 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:29:04,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1079962944] [2022-03-20 13:29:04,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:04,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:04,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:04,499 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 13:29:04,507 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 13:29:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:04,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 13:29:04,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:29:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:29:04,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:29:04,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:04,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452131158] [2022-03-20 13:29:04,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:29:04,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079962944] [2022-03-20 13:29:04,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079962944] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:04,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:04,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:29:04,848 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:04,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [4341274] [2022-03-20 13:29:04,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [4341274] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:04,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:04,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 13:29:04,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059408346] [2022-03-20 13:29:04,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:04,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 13:29:04,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:04,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 13:29:04,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-20 13:29:04,855 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:29:04,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:04,907 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-03-20 13:29:04,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 13:29:04,907 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-03-20 13:29:04,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:04,908 INFO L225 Difference]: With dead ends: 75 [2022-03-20 13:29:04,908 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 13:29:04,909 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-03-20 13:29:04,910 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:04,910 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 178 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:29:04,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 13:29:04,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-20 13:29:04,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.25) internal successors, (40), 34 states have internal predecessors, (40), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 13:29:04,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-03-20 13:29:04,921 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 33 [2022-03-20 13:29:04,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:04,921 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-03-20 13:29:04,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:29:04,922 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-03-20 13:29:04,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 13:29:04,922 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:04,923 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:04,943 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 13:29:05,123 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,SelfDestructingSolverStorable3 [2022-03-20 13:29:05,123 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:05,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:05,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1367773279, now seen corresponding path program 1 times [2022-03-20 13:29:05,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:05,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1016623193] [2022-03-20 13:29:05,179 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:29:05,179 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:05,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1673267454, now seen corresponding path program 1 times [2022-03-20 13:29:05,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:05,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112263371] [2022-03-20 13:29:05,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:05,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:05,197 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:29:05,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1911334737] [2022-03-20 13:29:05,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:05,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:05,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:05,208 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 13:29:05,209 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 13:29:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:05,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 13:29:05,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:29:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 13:29:05,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:29:05,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:05,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112263371] [2022-03-20 13:29:05,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:29:05,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911334737] [2022-03-20 13:29:05,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911334737] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:05,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:05,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:29:05,424 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:05,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1016623193] [2022-03-20 13:29:05,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1016623193] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:05,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:05,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 13:29:05,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000520561] [2022-03-20 13:29:05,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:05,428 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 13:29:05,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:05,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 13:29:05,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 13:29:05,429 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 10 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:29:05,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:05,461 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2022-03-20 13:29:05,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 13:29:05,462 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-03-20 13:29:05,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:05,466 INFO L225 Difference]: With dead ends: 61 [2022-03-20 13:29:05,466 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 13:29:05,466 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-20 13:29:05,469 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 18 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:05,470 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 212 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-03-20 13:29:05,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 13:29:05,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-20 13:29:05,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 13:29:05,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-03-20 13:29:05,483 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 34 [2022-03-20 13:29:05,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:05,483 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-03-20 13:29:05,483 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:29:05,483 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-03-20 13:29:05,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 13:29:05,494 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:05,494 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:05,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 13:29:05,717 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:05,718 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:05,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:05,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1234948107, now seen corresponding path program 1 times [2022-03-20 13:29:05,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:05,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [882816745] [2022-03-20 13:29:05,755 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:29:05,756 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:05,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1977046132, now seen corresponding path program 1 times [2022-03-20 13:29:05,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:05,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206603808] [2022-03-20 13:29:05,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:05,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:05,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:29:05,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833005505] [2022-03-20 13:29:05,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:05,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:05,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:05,766 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 13:29:05,793 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 13:29:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:05,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 13:29:05,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:29:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:29:05,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:29:05,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:05,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206603808] [2022-03-20 13:29:05,904 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:29:05,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833005505] [2022-03-20 13:29:05,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833005505] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:05,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:05,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:29:05,986 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:05,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [882816745] [2022-03-20 13:29:05,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [882816745] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:05,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:05,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 13:29:05,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045197934] [2022-03-20 13:29:05,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:05,987 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 13:29:05,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:05,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 13:29:05,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 13:29:05,987 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 10 states, 8 states have (on average 3.375) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:29:06,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:06,018 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2022-03-20 13:29:06,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 13:29:06,019 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-03-20 13:29:06,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:06,019 INFO L225 Difference]: With dead ends: 61 [2022-03-20 13:29:06,020 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 13:29:06,020 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-20 13:29:06,021 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:06,021 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 161 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 1 Unchecked, 0.0s Time] [2022-03-20 13:29:06,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 13:29:06,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-20 13:29:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 36 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 13:29:06,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-03-20 13:29:06,028 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 35 [2022-03-20 13:29:06,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:06,028 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-03-20 13:29:06,029 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:29:06,029 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-03-20 13:29:06,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 13:29:06,030 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:06,030 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:06,055 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 13:29:06,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:06,243 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:06,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:06,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1390786770, now seen corresponding path program 1 times [2022-03-20 13:29:06,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:06,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [306117495] [2022-03-20 13:29:06,277 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:29:06,277 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:06,278 INFO L85 PathProgramCache]: Analyzing trace with hash -193092723, now seen corresponding path program 1 times [2022-03-20 13:29:06,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:06,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526431030] [2022-03-20 13:29:06,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:06,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:06,285 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:29:06,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75797356] [2022-03-20 13:29:06,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:06,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:06,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:06,287 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 13:29:06,292 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 13:29:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:06,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:29:06,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:29:13,843 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 13:29:13,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:29:13,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:13,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526431030] [2022-03-20 13:29:13,844 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:29:13,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75797356] [2022-03-20 13:29:13,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75797356] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:13,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:13,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:29:20,372 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:20,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [306117495] [2022-03-20 13:29:20,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [306117495] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:20,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:20,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 13:29:20,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001541117] [2022-03-20 13:29:20,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:20,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 13:29:20,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:20,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 13:29:20,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=455, Unknown=5, NotChecked=0, Total=552 [2022-03-20 13:29:20,373 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 22 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:29:20,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:20,447 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2022-03-20 13:29:20,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:29:20,448 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2022-03-20 13:29:20,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:20,449 INFO L225 Difference]: With dead ends: 66 [2022-03-20 13:29:20,449 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 13:29:20,449 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=92, Invalid=455, Unknown=5, NotChecked=0, Total=552 [2022-03-20 13:29:20,450 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 3 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:20,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 337 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2022-03-20 13:29:20,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 13:29:20,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2022-03-20 13:29:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:29:20,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-03-20 13:29:20,456 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 36 [2022-03-20 13:29:20,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:20,457 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-03-20 13:29:20,457 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:29:20,457 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-03-20 13:29:20,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 13:29:20,457 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:20,458 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:20,482 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 13:29:20,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:20,671 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:20,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:20,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1295400781, now seen corresponding path program 1 times [2022-03-20 13:29:20,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:20,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1654205431] [2022-03-20 13:29:20,708 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:29:20,708 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:20,709 INFO L85 PathProgramCache]: Analyzing trace with hash 183395180, now seen corresponding path program 1 times [2022-03-20 13:29:20,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:20,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079857349] [2022-03-20 13:29:20,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:20,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:20,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:29:20,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897211955] [2022-03-20 13:29:20,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:20,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:20,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:20,724 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 13:29:20,725 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 13:29:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:20,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 13:29:20,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:29:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:29:20,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:29:20,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:20,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079857349] [2022-03-20 13:29:20,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:29:20,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897211955] [2022-03-20 13:29:20,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897211955] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:20,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:20,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:29:20,866 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:20,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1654205431] [2022-03-20 13:29:20,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1654205431] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:20,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:20,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:29:20,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392683580] [2022-03-20 13:29:20,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:20,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 13:29:20,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:20,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 13:29:20,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:29:20,868 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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 13:29:20,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:20,890 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2022-03-20 13:29:20,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 13:29:20,890 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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 36 [2022-03-20 13:29:20,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:20,891 INFO L225 Difference]: With dead ends: 47 [2022-03-20 13:29:20,891 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 13:29:20,891 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:29:20,892 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 21 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:20,892 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 111 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:29:20,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 13:29:20,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-20 13:29:20,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:29:20,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-03-20 13:29:20,905 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 36 [2022-03-20 13:29:20,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:20,906 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-03-20 13:29:20,907 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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 13:29:20,907 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-03-20 13:29:20,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 13:29:20,910 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:20,910 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:20,934 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 13:29:21,110 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:21,111 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:21,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:21,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1443111891, now seen corresponding path program 1 times [2022-03-20 13:29:21,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:21,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1744053519] [2022-03-20 13:29:21,144 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:29:21,144 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:21,145 INFO L85 PathProgramCache]: Analyzing trace with hash -141792210, now seen corresponding path program 1 times [2022-03-20 13:29:21,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:21,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400911229] [2022-03-20 13:29:21,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:21,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:21,164 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:29:21,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960960176] [2022-03-20 13:29:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:21,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:21,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:21,166 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 13:29:21,167 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 13:29:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:21,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 13:29:21,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:29:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:29:21,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:29:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:29:21,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:21,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400911229] [2022-03-20 13:29:21,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:29:21,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960960176] [2022-03-20 13:29:21,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960960176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:29:21,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:29:21,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 22 [2022-03-20 13:29:21,634 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:21,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1744053519] [2022-03-20 13:29:21,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1744053519] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:21,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:21,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 13:29:21,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550752337] [2022-03-20 13:29:21,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:21,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 13:29:21,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:21,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 13:29:21,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2022-03-20 13:29:21,636 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:29:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:21,818 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2022-03-20 13:29:21,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 13:29:21,819 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-03-20 13:29:21,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:21,821 INFO L225 Difference]: With dead ends: 70 [2022-03-20 13:29:21,821 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 13:29:21,822 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 48 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2022-03-20 13:29:21,822 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:21,822 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 483 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:29:21,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 13:29:21,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2022-03-20 13:29:21,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 44 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 13:29:21,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2022-03-20 13:29:21,833 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 37 [2022-03-20 13:29:21,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:21,834 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2022-03-20 13:29:21,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:29:21,834 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2022-03-20 13:29:21,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 13:29:21,851 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:21,851 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:21,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 13:29:22,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:22,059 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:22,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:22,060 INFO L85 PathProgramCache]: Analyzing trace with hash -437658803, now seen corresponding path program 2 times [2022-03-20 13:29:22,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:22,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [614463473] [2022-03-20 13:29:22,090 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:29:22,090 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:22,091 INFO L85 PathProgramCache]: Analyzing trace with hash 2125275948, now seen corresponding path program 1 times [2022-03-20 13:29:22,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:22,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543788357] [2022-03-20 13:29:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:22,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:22,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:29:22,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121813593] [2022-03-20 13:29:22,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:22,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:22,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:22,099 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 13:29:22,125 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 13:29:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:22,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 13:29:22,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:29:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:29:22,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:29:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:29:22,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:22,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543788357] [2022-03-20 13:29:22,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:29:22,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121813593] [2022-03-20 13:29:22,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121813593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:29:22,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:29:22,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 13:29:22,314 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:22,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [614463473] [2022-03-20 13:29:22,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [614463473] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:22,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:22,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:29:22,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288087454] [2022-03-20 13:29:22,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:22,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 13:29:22,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:22,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 13:29:22,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-20 13:29:22,315 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 13:29:22,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:22,346 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2022-03-20 13:29:22,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 13:29:22,347 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 38 [2022-03-20 13:29:22,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:22,348 INFO L225 Difference]: With dead ends: 80 [2022-03-20 13:29:22,348 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 13:29:22,349 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-20 13:29:22,350 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 12 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:22,351 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 126 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:29:22,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 13:29:22,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2022-03-20 13:29:22,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.25) internal successors, (65), 54 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 13:29:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-03-20 13:29:22,365 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 38 [2022-03-20 13:29:22,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:22,365 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-03-20 13:29:22,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 13:29:22,366 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-03-20 13:29:22,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 13:29:22,366 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:22,366 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:22,387 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 13:29:22,581 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,SelfDestructingSolverStorable9 [2022-03-20 13:29:22,581 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:22,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:22,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1488699212, now seen corresponding path program 3 times [2022-03-20 13:29:22,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:22,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [646537701] [2022-03-20 13:29:22,610 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:29:22,611 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:22,611 INFO L85 PathProgramCache]: Analyzing trace with hash 633396971, now seen corresponding path program 1 times [2022-03-20 13:29:22,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:22,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748470544] [2022-03-20 13:29:22,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:22,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:22,617 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:29:22,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738922411] [2022-03-20 13:29:22,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:22,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:22,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:22,619 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 13:29:22,623 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 13:29:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:22,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 13:29:22,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:29:22,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:29:22,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:29:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:29:23,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:23,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748470544] [2022-03-20 13:29:23,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:29:23,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738922411] [2022-03-20 13:29:23,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738922411] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:29:23,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:29:23,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-03-20 13:29:23,148 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:23,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [646537701] [2022-03-20 13:29:23,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [646537701] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:23,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:23,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 13:29:23,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266124733] [2022-03-20 13:29:23,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:23,149 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 13:29:23,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:23,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 13:29:23,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-20 13:29:23,150 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:29:23,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:23,251 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2022-03-20 13:29:23,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 13:29:23,252 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-03-20 13:29:23,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:23,253 INFO L225 Difference]: With dead ends: 82 [2022-03-20 13:29:23,253 INFO L226 Difference]: Without dead ends: 76 [2022-03-20 13:29:23,253 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-20 13:29:23,254 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 16 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:23,254 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 298 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-03-20 13:29:23,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-20 13:29:23,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-03-20 13:29:23,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 63 states have internal predecessors, (74), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-20 13:29:23,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-03-20 13:29:23,266 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 38 [2022-03-20 13:29:23,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:23,267 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-03-20 13:29:23,267 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:29:23,267 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-03-20 13:29:23,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 13:29:23,267 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:23,267 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:23,289 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 13:29:23,486 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:23,486 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:23,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:23,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1229776654, now seen corresponding path program 4 times [2022-03-20 13:29:23,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:23,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [467196237] [2022-03-20 13:29:23,516 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:29:23,517 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:23,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1251204717, now seen corresponding path program 1 times [2022-03-20 13:29:23,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:23,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769613304] [2022-03-20 13:29:23,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:23,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:23,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:29:23,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986046173] [2022-03-20 13:29:23,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:23,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:23,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:23,533 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 13:29:23,545 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 13:29:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:23,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 13:29:23,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:29:32,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:29:32,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:29:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:29:33,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:33,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769613304] [2022-03-20 13:29:33,390 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:29:33,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986046173] [2022-03-20 13:29:33,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986046173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:29:33,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:29:33,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2022-03-20 13:29:33,677 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:33,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [467196237] [2022-03-20 13:29:33,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [467196237] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:33,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:33,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 13:29:33,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699281890] [2022-03-20 13:29:33,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:33,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 13:29:33,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:33,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 13:29:33,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-03-20 13:29:33,678 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:29:33,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:33,761 INFO L93 Difference]: Finished difference Result 94 states and 117 transitions. [2022-03-20 13:29:33,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 13:29:33,761 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 38 [2022-03-20 13:29:33,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:33,764 INFO L225 Difference]: With dead ends: 94 [2022-03-20 13:29:33,764 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 13:29:33,765 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-03-20 13:29:33,767 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 14 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:33,768 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 375 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 74 Unchecked, 0.0s Time] [2022-03-20 13:29:33,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 13:29:33,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2022-03-20 13:29:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 67 states have internal predecessors, (76), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 13:29:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2022-03-20 13:29:33,784 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 38 [2022-03-20 13:29:33,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:33,785 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2022-03-20 13:29:33,785 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:29:33,785 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2022-03-20 13:29:33,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 13:29:33,786 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:33,786 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:33,812 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 13:29:33,991 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,SelfDestructingSolverStorable11 [2022-03-20 13:29:33,991 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:33,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:33,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1473231215, now seen corresponding path program 5 times [2022-03-20 13:29:33,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:33,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2127324455] [2022-03-20 13:29:34,018 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:29:34,018 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:34,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1923577714, now seen corresponding path program 1 times [2022-03-20 13:29:34,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:34,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559012827] [2022-03-20 13:29:34,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:34,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:34,031 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:29:34,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421171379] [2022-03-20 13:29:34,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:34,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:34,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:34,032 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 13:29:34,058 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 13:29:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:34,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 13:29:34,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:29:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:29:34,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:29:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:29:34,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:34,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559012827] [2022-03-20 13:29:34,411 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:29:34,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421171379] [2022-03-20 13:29:34,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421171379] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:29:34,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:29:34,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-03-20 13:29:34,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:34,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2127324455] [2022-03-20 13:29:34,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2127324455] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:34,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:34,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 13:29:34,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901423843] [2022-03-20 13:29:34,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:34,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 13:29:34,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:34,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 13:29:34,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-20 13:29:34,553 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:29:34,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:34,652 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2022-03-20 13:29:34,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 13:29:34,653 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-03-20 13:29:34,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:34,653 INFO L225 Difference]: With dead ends: 94 [2022-03-20 13:29:34,653 INFO L226 Difference]: Without dead ends: 82 [2022-03-20 13:29:34,654 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-03-20 13:29:34,655 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 16 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:34,655 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 385 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 133 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-03-20 13:29:34,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-20 13:29:34,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2022-03-20 13:29:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 68 states have internal predecessors, (77), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-03-20 13:29:34,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2022-03-20 13:29:34,670 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 38 [2022-03-20 13:29:34,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:34,671 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2022-03-20 13:29:34,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:29:34,671 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2022-03-20 13:29:34,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 13:29:34,671 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:34,672 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:34,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-20 13:29:34,875 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,SelfDestructingSolverStorable12 [2022-03-20 13:29:34,875 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:34,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:34,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1109766783, now seen corresponding path program 6 times [2022-03-20 13:29:34,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:34,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [681304435] [2022-03-20 13:29:34,899 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:29:34,899 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:34,899 INFO L85 PathProgramCache]: Analyzing trace with hash 296740736, now seen corresponding path program 1 times [2022-03-20 13:29:34,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:34,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016777882] [2022-03-20 13:29:34,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:34,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:34,905 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:29:34,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428223892] [2022-03-20 13:29:34,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:34,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:34,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:34,906 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 13:29:34,908 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 13:29:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:34,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 13:29:34,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:29:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 13:29:41,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:29:44,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 13:29:44,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:44,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016777882] [2022-03-20 13:29:44,094 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:29:44,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428223892] [2022-03-20 13:29:44,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428223892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:29:44,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:29:44,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2022-03-20 13:29:50,992 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:50,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [681304435] [2022-03-20 13:29:50,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [681304435] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:50,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:50,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 13:29:50,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390635455] [2022-03-20 13:29:50,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:50,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 13:29:50,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:50,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 13:29:50,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=643, Unknown=2, NotChecked=0, Total=756 [2022-03-20 13:29:50,993 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:29:51,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:51,032 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2022-03-20 13:29:51,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 13:29:51,032 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2022-03-20 13:29:51,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:51,033 INFO L225 Difference]: With dead ends: 86 [2022-03-20 13:29:51,033 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 13:29:51,034 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=111, Invalid=643, Unknown=2, NotChecked=0, Total=756 [2022-03-20 13:29:51,034 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:51,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 329 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 53 Unchecked, 0.0s Time] [2022-03-20 13:29:51,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 13:29:51,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2022-03-20 13:29:51,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 60 states have internal predecessors, (69), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 13:29:51,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2022-03-20 13:29:51,052 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 39 [2022-03-20 13:29:51,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:51,052 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2022-03-20 13:29:51,052 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:29:51,052 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2022-03-20 13:29:51,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 13:29:51,053 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:51,053 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:51,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-20 13:29:51,266 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,SelfDestructingSolverStorable13 [2022-03-20 13:29:51,267 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:51,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:51,267 INFO L85 PathProgramCache]: Analyzing trace with hash -553670662, now seen corresponding path program 7 times [2022-03-20 13:29:51,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:51,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1947075732] [2022-03-20 13:29:51,292 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:29:51,292 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:51,293 INFO L85 PathProgramCache]: Analyzing trace with hash 42138939, now seen corresponding path program 1 times [2022-03-20 13:29:51,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:51,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706121238] [2022-03-20 13:29:51,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:51,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:51,298 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:29:51,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558482433] [2022-03-20 13:29:51,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:51,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:51,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:51,300 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 13:29:51,308 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 13:29:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:51,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:29:51,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:29:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 13:29:51,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:29:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 13:29:51,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:51,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706121238] [2022-03-20 13:29:51,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:29:51,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558482433] [2022-03-20 13:29:51,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558482433] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:29:51,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:29:51,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-03-20 13:29:51,514 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:51,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1947075732] [2022-03-20 13:29:51,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1947075732] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:51,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:51,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:29:51,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823680647] [2022-03-20 13:29:51,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:51,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:29:51,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:51,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:29:51,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-03-20 13:29:51,515 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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 13:29:51,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:51,545 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2022-03-20 13:29:51,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:29:51,546 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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 39 [2022-03-20 13:29:51,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:51,547 INFO L225 Difference]: With dead ends: 85 [2022-03-20 13:29:51,547 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 13:29:51,550 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-03-20 13:29:51,551 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 31 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:51,551 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 134 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:29:51,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 13:29:51,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-20 13:29:51,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 62 states have internal predecessors, (71), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 13:29:51,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-03-20 13:29:51,571 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 39 [2022-03-20 13:29:51,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:51,571 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-03-20 13:29:51,572 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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 13:29:51,572 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-03-20 13:29:51,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 13:29:51,572 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:51,572 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:51,601 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 13:29:51,795 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,SelfDestructingSolverStorable14 [2022-03-20 13:29:51,795 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:51,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:51,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1701022282, now seen corresponding path program 8 times [2022-03-20 13:29:51,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:51,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [738612785] [2022-03-20 13:29:51,823 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:29:51,823 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:51,823 INFO L85 PathProgramCache]: Analyzing trace with hash -589299765, now seen corresponding path program 1 times [2022-03-20 13:29:51,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:51,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971396486] [2022-03-20 13:29:51,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:51,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:51,834 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:29:51,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020457879] [2022-03-20 13:29:51,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:51,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:51,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:51,836 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 13:29:51,839 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 13:29:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:51,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 13:29:51,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:29:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:29:52,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:29:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:29:52,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:52,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971396486] [2022-03-20 13:29:52,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:29:52,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020457879] [2022-03-20 13:29:52,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020457879] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:29:52,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:29:52,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 24 [2022-03-20 13:29:52,314 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:52,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [738612785] [2022-03-20 13:29:52,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [738612785] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:52,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:52,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 13:29:52,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181969416] [2022-03-20 13:29:52,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:52,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 13:29:52,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:52,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 13:29:52,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2022-03-20 13:29:52,316 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:29:52,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:52,577 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2022-03-20 13:29:52,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 13:29:52,577 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-03-20 13:29:52,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:52,578 INFO L225 Difference]: With dead ends: 109 [2022-03-20 13:29:52,578 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 13:29:52,579 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2022-03-20 13:29:52,579 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 36 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:52,579 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 713 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:29:52,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 13:29:52,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 89. [2022-03-20 13:29:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 77 states have internal predecessors, (87), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-03-20 13:29:52,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2022-03-20 13:29:52,602 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 39 [2022-03-20 13:29:52,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:52,602 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2022-03-20 13:29:52,603 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:29:52,603 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2022-03-20 13:29:52,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 13:29:52,603 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:52,603 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:52,631 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 13:29:52,816 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:52,816 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:52,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:52,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1365215520, now seen corresponding path program 9 times [2022-03-20 13:29:52,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:52,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1244327766] [2022-03-20 13:29:52,847 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:29:52,847 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:52,847 INFO L85 PathProgramCache]: Analyzing trace with hash -191059073, now seen corresponding path program 1 times [2022-03-20 13:29:52,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:52,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935535652] [2022-03-20 13:29:52,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:52,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:52,869 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:29:52,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327049908] [2022-03-20 13:29:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:52,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:52,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:52,871 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 13:29:52,882 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 13:29:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:52,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 13:29:52,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:29:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:29:53,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:29:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:29:53,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:53,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935535652] [2022-03-20 13:29:53,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:29:53,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327049908] [2022-03-20 13:29:53,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327049908] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:29:53,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:29:53,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 26 [2022-03-20 13:29:53,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:53,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1244327766] [2022-03-20 13:29:53,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1244327766] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:53,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:53,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 13:29:53,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898308292] [2022-03-20 13:29:53,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:53,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 13:29:53,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:53,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 13:29:53,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-03-20 13:29:53,361 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:29:53,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:53,626 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2022-03-20 13:29:53,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 13:29:53,627 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-03-20 13:29:53,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:53,628 INFO L225 Difference]: With dead ends: 107 [2022-03-20 13:29:53,628 INFO L226 Difference]: Without dead ends: 101 [2022-03-20 13:29:53,628 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2022-03-20 13:29:53,629 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:53,629 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 553 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:29:53,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-20 13:29:53,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2022-03-20 13:29:53,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 86 states have internal predecessors, (96), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-03-20 13:29:53,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2022-03-20 13:29:53,656 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 40 [2022-03-20 13:29:53,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:53,656 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2022-03-20 13:29:53,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:29:53,656 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2022-03-20 13:29:53,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 13:29:53,657 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:53,657 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:53,679 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 13:29:53,879 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,SelfDestructingSolverStorable16 [2022-03-20 13:29:53,880 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:53,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:53,880 INFO L85 PathProgramCache]: Analyzing trace with hash 172610767, now seen corresponding path program 10 times [2022-03-20 13:29:53,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:53,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [721305766] [2022-03-20 13:29:53,913 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:29:53,913 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:53,913 INFO L85 PathProgramCache]: Analyzing trace with hash -659431698, now seen corresponding path program 1 times [2022-03-20 13:29:53,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:53,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641141316] [2022-03-20 13:29:53,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:53,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:53,919 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:29:53,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036009248] [2022-03-20 13:29:53,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:53,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:53,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:53,921 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 13:29:53,946 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 13:29:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:53,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 13:29:53,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:29:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:29:54,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:29:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:29:54,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:54,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641141316] [2022-03-20 13:29:54,631 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:29:54,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036009248] [2022-03-20 13:29:54,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036009248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:29:54,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:29:54,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2022-03-20 13:29:54,831 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:54,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [721305766] [2022-03-20 13:29:54,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [721305766] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:54,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:54,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 13:29:54,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314833222] [2022-03-20 13:29:54,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:54,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 13:29:54,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:54,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 13:29:54,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-20 13:29:54,833 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:29:55,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:55,115 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2022-03-20 13:29:55,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 13:29:55,116 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-03-20 13:29:55,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:55,117 INFO L225 Difference]: With dead ends: 121 [2022-03-20 13:29:55,117 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 13:29:55,118 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-03-20 13:29:55,118 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 34 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:55,118 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 470 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 202 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2022-03-20 13:29:55,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 13:29:55,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2022-03-20 13:29:55,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 80 states have (on average 1.2375) internal successors, (99), 88 states have internal predecessors, (99), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-03-20 13:29:55,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2022-03-20 13:29:55,151 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 40 [2022-03-20 13:29:55,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:55,152 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2022-03-20 13:29:55,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:29:55,152 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2022-03-20 13:29:55,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 13:29:55,153 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:55,153 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:55,178 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 13:29:55,371 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,SelfDestructingSolverStorable17 [2022-03-20 13:29:55,371 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:55,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:55,372 INFO L85 PathProgramCache]: Analyzing trace with hash -306897140, now seen corresponding path program 11 times [2022-03-20 13:29:55,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:55,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [407424308] [2022-03-20 13:29:55,398 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:29:55,398 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:55,398 INFO L85 PathProgramCache]: Analyzing trace with hash -414707477, now seen corresponding path program 1 times [2022-03-20 13:29:55,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:55,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821342846] [2022-03-20 13:29:55,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:55,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:55,404 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:29:55,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217690489] [2022-03-20 13:29:55,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:55,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:55,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:55,405 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 13:29:55,407 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 13:29:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:55,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 13:29:55,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:29:55,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:29:55,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:29:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:29:56,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:56,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821342846] [2022-03-20 13:29:56,101 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:29:56,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217690489] [2022-03-20 13:29:56,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217690489] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:29:56,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:29:56,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2022-03-20 13:29:56,317 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:56,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [407424308] [2022-03-20 13:29:56,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [407424308] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:56,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:56,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 13:29:56,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830521178] [2022-03-20 13:29:56,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:56,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 13:29:56,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:56,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 13:29:56,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-20 13:29:56,318 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:29:56,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:56,536 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2022-03-20 13:29:56,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 13:29:56,537 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-03-20 13:29:56,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:56,538 INFO L225 Difference]: With dead ends: 116 [2022-03-20 13:29:56,538 INFO L226 Difference]: Without dead ends: 104 [2022-03-20 13:29:56,538 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-03-20 13:29:56,539 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 28 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:56,539 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 521 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 206 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2022-03-20 13:29:56,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-20 13:29:56,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2022-03-20 13:29:56,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 89 states have internal predecessors, (100), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-03-20 13:29:56,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 121 transitions. [2022-03-20 13:29:56,570 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 121 transitions. Word has length 40 [2022-03-20 13:29:56,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:56,570 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 121 transitions. [2022-03-20 13:29:56,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:29:56,571 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 121 transitions. [2022-03-20 13:29:56,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 13:29:56,571 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:56,571 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:56,597 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 13:29:56,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:56,788 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:56,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:56,788 INFO L85 PathProgramCache]: Analyzing trace with hash 721145018, now seen corresponding path program 12 times [2022-03-20 13:29:56,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:56,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [709104595] [2022-03-20 13:29:56,819 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:29:56,820 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:56,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1644615941, now seen corresponding path program 1 times [2022-03-20 13:29:56,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:56,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518040246] [2022-03-20 13:29:56,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:56,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:56,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:29:56,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296990796] [2022-03-20 13:29:56,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:56,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:56,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:56,828 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 13:29:56,830 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 13:29:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:56,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 13:29:56,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:29:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 13:29:56,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:29:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 13:29:57,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:57,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518040246] [2022-03-20 13:29:57,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:29:57,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296990796] [2022-03-20 13:29:57,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296990796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:29:57,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:29:57,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-03-20 13:29:57,067 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:57,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [709104595] [2022-03-20 13:29:57,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [709104595] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:57,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:57,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 13:29:57,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354105480] [2022-03-20 13:29:57,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:57,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 13:29:57,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:57,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 13:29:57,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-20 13:29:57,068 INFO L87 Difference]: Start difference. First operand 102 states and 121 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 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 13:29:57,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:57,143 INFO L93 Difference]: Finished difference Result 146 states and 175 transitions. [2022-03-20 13:29:57,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 13:29:57,144 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 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 41 [2022-03-20 13:29:57,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:57,145 INFO L225 Difference]: With dead ends: 146 [2022-03-20 13:29:57,145 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 13:29:57,145 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-03-20 13:29:57,146 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 34 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:57,146 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 119 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:29:57,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 13:29:57,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 119. [2022-03-20 13:29:57,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 98 states have (on average 1.2346938775510203) internal successors, (121), 106 states have internal predecessors, (121), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-03-20 13:29:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2022-03-20 13:29:57,177 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 41 [2022-03-20 13:29:57,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:57,177 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2022-03-20 13:29:57,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 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 13:29:57,178 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2022-03-20 13:29:57,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 13:29:57,178 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:57,178 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:57,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-20 13:29:57,401 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:57,401 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:57,402 INFO L85 PathProgramCache]: Analyzing trace with hash 694191775, now seen corresponding path program 13 times [2022-03-20 13:29:57,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:57,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [531470895] [2022-03-20 13:29:57,435 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:29:57,435 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:57,436 INFO L85 PathProgramCache]: Analyzing trace with hash -695209696, now seen corresponding path program 1 times [2022-03-20 13:29:57,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:57,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865441623] [2022-03-20 13:29:57,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:57,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:57,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:29:57,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029285624] [2022-03-20 13:29:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:57,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:57,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:57,462 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 13:29:57,465 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 13:29:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:57,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 13:29:57,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:30:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 13:30:03,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:30:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 13:30:05,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:30:05,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865441623] [2022-03-20 13:30:05,325 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:30:05,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029285624] [2022-03-20 13:30:05,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029285624] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:30:05,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:30:05,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2022-03-20 13:30:05,772 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:30:05,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [531470895] [2022-03-20 13:30:05,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [531470895] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:30:05,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:30:05,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 13:30:05,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197059746] [2022-03-20 13:30:05,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:30:05,773 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 13:30:05,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:05,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 13:30:05,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=747, Unknown=1, NotChecked=0, Total=870 [2022-03-20 13:30:05,774 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand has 19 states, 16 states have (on average 2.0) internal successors, (32), 18 states have internal predecessors, (32), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:30:05,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:30:05,868 INFO L93 Difference]: Finished difference Result 148 states and 176 transitions. [2022-03-20 13:30:05,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 13:30:05,869 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.0) internal successors, (32), 18 states have internal predecessors, (32), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2022-03-20 13:30:05,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:30:05,870 INFO L225 Difference]: With dead ends: 148 [2022-03-20 13:30:05,870 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 13:30:05,871 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=129, Invalid=800, Unknown=1, NotChecked=0, Total=930 [2022-03-20 13:30:05,872 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 24 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:30:05,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 467 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 97 Unchecked, 0.0s Time] [2022-03-20 13:30:05,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 13:30:05,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2022-03-20 13:30:05,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 106 states have (on average 1.2264150943396226) internal successors, (130), 118 states have internal predecessors, (130), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-03-20 13:30:05,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 159 transitions. [2022-03-20 13:30:05,902 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 159 transitions. Word has length 41 [2022-03-20 13:30:05,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:30:05,903 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 159 transitions. [2022-03-20 13:30:05,903 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.0) internal successors, (32), 18 states have internal predecessors, (32), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:30:05,903 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 159 transitions. [2022-03-20 13:30:05,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 13:30:05,904 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:30:05,904 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:30:05,922 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 13:30:06,110 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:06,110 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:30:06,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:30:06,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1943349171, now seen corresponding path program 14 times [2022-03-20 13:30:06,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:06,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [386894522] [2022-03-20 13:30:06,141 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:30:06,141 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:30:06,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1938576142, now seen corresponding path program 1 times [2022-03-20 13:30:06,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:30:06,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12431121] [2022-03-20 13:30:06,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:06,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:30:06,146 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:30:06,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880411109] [2022-03-20 13:30:06,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:06,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:06,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:30:06,148 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 13:30:06,148 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 13:30:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:06,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 13:30:06,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:30:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:30:06,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:30:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:30:06,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:30:06,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12431121] [2022-03-20 13:30:06,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:30:06,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880411109] [2022-03-20 13:30:06,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880411109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:30:06,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:30:06,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 26 [2022-03-20 13:30:06,771 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:30:06,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [386894522] [2022-03-20 13:30:06,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [386894522] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:30:06,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:30:06,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 13:30:06,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699343251] [2022-03-20 13:30:06,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:30:06,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 13:30:06,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:06,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 13:30:06,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2022-03-20 13:30:06,772 INFO L87 Difference]: Start difference. First operand 133 states and 159 transitions. Second operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:30:07,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:30:07,106 INFO L93 Difference]: Finished difference Result 181 states and 217 transitions. [2022-03-20 13:30:07,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 13:30:07,108 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-03-20 13:30:07,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:30:07,109 INFO L225 Difference]: With dead ends: 181 [2022-03-20 13:30:07,109 INFO L226 Difference]: Without dead ends: 175 [2022-03-20 13:30:07,110 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2022-03-20 13:30:07,111 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 48 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:30:07,111 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1016 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:30:07,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-20 13:30:07,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 149. [2022-03-20 13:30:07,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 119 states have (on average 1.226890756302521) internal successors, (146), 133 states have internal predecessors, (146), 12 states have call successors, (12), 5 states have call predecessors, (12), 17 states have return successors, (21), 10 states have call predecessors, (21), 10 states have call successors, (21) [2022-03-20 13:30:07,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 179 transitions. [2022-03-20 13:30:07,162 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 179 transitions. Word has length 41 [2022-03-20 13:30:07,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:30:07,162 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 179 transitions. [2022-03-20 13:30:07,162 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:30:07,162 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 179 transitions. [2022-03-20 13:30:07,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 13:30:07,164 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:30:07,165 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:30:07,197 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 13:30:07,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 13:30:07,379 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:30:07,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:30:07,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1212394418, now seen corresponding path program 15 times [2022-03-20 13:30:07,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:07,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [180551427] [2022-03-20 13:30:07,412 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:30:07,412 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:30:07,413 INFO L85 PathProgramCache]: Analyzing trace with hash -929420947, now seen corresponding path program 1 times [2022-03-20 13:30:07,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:30:07,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972100075] [2022-03-20 13:30:07,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:07,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:30:07,432 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:30:07,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63734404] [2022-03-20 13:30:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:07,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:07,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:30:07,444 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 13:30:07,446 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 13:30:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:07,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 13:30:07,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:30:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 13:30:19,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:30:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 13:30:21,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:30:21,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972100075] [2022-03-20 13:30:21,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:30:21,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63734404] [2022-03-20 13:30:21,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63734404] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:30:21,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:30:21,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2022-03-20 13:30:27,290 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:30:27,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [180551427] [2022-03-20 13:30:27,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [180551427] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:30:27,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:30:27,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 13:30:27,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30926465] [2022-03-20 13:30:27,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:30:27,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 13:30:27,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:27,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 13:30:27,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-03-20 13:30:27,292 INFO L87 Difference]: Start difference. First operand 149 states and 179 transitions. Second operand has 19 states, 16 states have (on average 2.0) internal successors, (32), 18 states have internal predecessors, (32), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:30:27,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:30:27,392 INFO L93 Difference]: Finished difference Result 155 states and 184 transitions. [2022-03-20 13:30:27,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 13:30:27,393 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.0) internal successors, (32), 18 states have internal predecessors, (32), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2022-03-20 13:30:27,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:30:27,394 INFO L225 Difference]: With dead ends: 155 [2022-03-20 13:30:27,394 INFO L226 Difference]: Without dead ends: 144 [2022-03-20 13:30:27,395 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-03-20 13:30:27,395 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 20 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:30:27,396 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 440 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-03-20 13:30:27,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-20 13:30:27,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2022-03-20 13:30:27,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 113 states have (on average 1.2212389380530972) internal successors, (138), 125 states have internal predecessors, (138), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2022-03-20 13:30:27,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 165 transitions. [2022-03-20 13:30:27,436 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 165 transitions. Word has length 42 [2022-03-20 13:30:27,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:30:27,436 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 165 transitions. [2022-03-20 13:30:27,436 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.0) internal successors, (32), 18 states have internal predecessors, (32), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:30:27,436 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 165 transitions. [2022-03-20 13:30:27,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 13:30:27,437 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:30:27,437 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:30:27,456 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 13:30:27,644 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-20 13:30:27,645 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:30:27,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:30:27,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1837396333, now seen corresponding path program 16 times [2022-03-20 13:30:27,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:27,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1290644924] [2022-03-20 13:30:27,674 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:30:27,674 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:30:27,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1972224436, now seen corresponding path program 1 times [2022-03-20 13:30:27,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:30:27,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556424202] [2022-03-20 13:30:27,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:27,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:30:27,680 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:30:27,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309864311] [2022-03-20 13:30:27,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:27,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:27,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:30:27,682 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 13:30:27,682 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 13:30:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:27,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 13:30:27,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:30:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 13:30:27,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:30:27,912 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 13:30:27,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:30:27,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556424202] [2022-03-20 13:30:27,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:30:27,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309864311] [2022-03-20 13:30:27,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309864311] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:30:27,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:30:27,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-03-20 13:30:27,928 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:30:27,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1290644924] [2022-03-20 13:30:27,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1290644924] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:30:27,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:30:27,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 13:30:27,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376796100] [2022-03-20 13:30:27,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:30:27,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 13:30:27,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:27,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 13:30:27,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-03-20 13:30:27,929 INFO L87 Difference]: Start difference. First operand 140 states and 165 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 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 13:30:28,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:30:28,019 INFO L93 Difference]: Finished difference Result 158 states and 185 transitions. [2022-03-20 13:30:28,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 13:30:28,020 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 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 42 [2022-03-20 13:30:28,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:30:28,021 INFO L225 Difference]: With dead ends: 158 [2022-03-20 13:30:28,021 INFO L226 Difference]: Without dead ends: 143 [2022-03-20 13:30:28,022 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-03-20 13:30:28,023 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 34 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:30:28,023 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 151 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:30:28,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-20 13:30:28,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-03-20 13:30:28,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 116 states have (on average 1.2155172413793103) internal successors, (141), 128 states have internal predecessors, (141), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2022-03-20 13:30:28,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2022-03-20 13:30:28,072 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 42 [2022-03-20 13:30:28,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:30:28,072 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2022-03-20 13:30:28,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 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 13:30:28,072 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2022-03-20 13:30:28,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 13:30:28,073 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:30:28,073 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:30:28,099 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 13:30:28,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:28,300 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:30:28,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:30:28,300 INFO L85 PathProgramCache]: Analyzing trace with hash -861547299, now seen corresponding path program 17 times [2022-03-20 13:30:28,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:28,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1306646423] [2022-03-20 13:30:28,332 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:30:28,332 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:30:28,332 INFO L85 PathProgramCache]: Analyzing trace with hash -173827716, now seen corresponding path program 1 times [2022-03-20 13:30:28,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:30:28,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537479966] [2022-03-20 13:30:28,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:28,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:30:28,340 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:30:28,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268504044] [2022-03-20 13:30:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:28,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:28,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:30:28,341 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 13:30:28,342 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 13:30:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:28,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 13:30:28,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:30:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:30:28,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:30:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:30:28,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:30:28,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537479966] [2022-03-20 13:30:28,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:30:28,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268504044] [2022-03-20 13:30:28,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268504044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:30:28,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:30:28,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2022-03-20 13:30:28,879 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:30:28,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1306646423] [2022-03-20 13:30:28,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1306646423] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:30:28,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:30:28,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 13:30:28,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345943983] [2022-03-20 13:30:28,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:30:28,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 13:30:28,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:28,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 13:30:28,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2022-03-20 13:30:28,881 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:30:29,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:30:29,153 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2022-03-20 13:30:29,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 13:30:29,153 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-03-20 13:30:29,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:30:29,154 INFO L225 Difference]: With dead ends: 149 [2022-03-20 13:30:29,154 INFO L226 Difference]: Without dead ends: 131 [2022-03-20 13:30:29,155 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=1030, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 13:30:29,156 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 35 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:30:29,156 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 781 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:30:29,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-20 13:30:29,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-03-20 13:30:29,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 117 states have internal predecessors, (130), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-03-20 13:30:29,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 154 transitions. [2022-03-20 13:30:29,193 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 154 transitions. Word has length 42 [2022-03-20 13:30:29,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:30:29,193 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 154 transitions. [2022-03-20 13:30:29,193 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:30:29,193 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 154 transitions. [2022-03-20 13:30:29,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 13:30:29,194 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:30:29,194 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:30:29,212 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 13:30:29,400 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:29,400 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:30:29,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:30:29,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1133754580, now seen corresponding path program 18 times [2022-03-20 13:30:29,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:29,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1038662825] [2022-03-20 13:30:29,433 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:30:29,434 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:30:29,434 INFO L85 PathProgramCache]: Analyzing trace with hash -243661941, now seen corresponding path program 1 times [2022-03-20 13:30:29,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:30:29,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253220306] [2022-03-20 13:30:29,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:29,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:30:29,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:30:29,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561853385] [2022-03-20 13:30:29,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:29,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:29,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:30:29,450 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 13:30:29,451 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 13:30:29,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:29,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 13:30:29,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:30:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:30:29,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:30:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:30:30,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:30:30,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253220306] [2022-03-20 13:30:30,286 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:30:30,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561853385] [2022-03-20 13:30:30,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561853385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:30:30,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:30:30,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-20 13:30:30,486 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:30:30,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1038662825] [2022-03-20 13:30:30,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1038662825] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:30:30,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:30:30,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 13:30:30,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531423488] [2022-03-20 13:30:30,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:30:30,487 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 13:30:30,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:30,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 13:30:30,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-20 13:30:30,488 INFO L87 Difference]: Start difference. First operand 131 states and 154 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:30:30,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:30:30,874 INFO L93 Difference]: Finished difference Result 168 states and 199 transitions. [2022-03-20 13:30:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 13:30:30,875 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-03-20 13:30:30,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:30:30,876 INFO L225 Difference]: With dead ends: 168 [2022-03-20 13:30:30,876 INFO L226 Difference]: Without dead ends: 157 [2022-03-20 13:30:30,878 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2022-03-20 13:30:30,878 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 55 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:30:30,878 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 572 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 241 Invalid, 0 Unknown, 26 Unchecked, 0.2s Time] [2022-03-20 13:30:30,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-20 13:30:30,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 148. [2022-03-20 13:30:30,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 121 states have (on average 1.2148760330578512) internal successors, (147), 133 states have internal predecessors, (147), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2022-03-20 13:30:30,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 175 transitions. [2022-03-20 13:30:30,922 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 175 transitions. Word has length 42 [2022-03-20 13:30:30,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:30:30,922 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 175 transitions. [2022-03-20 13:30:30,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:30:30,922 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 175 transitions. [2022-03-20 13:30:30,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 13:30:30,923 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:30:30,923 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:30:30,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 13:30:31,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 13:30:31,136 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:30:31,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:30:31,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1181369487, now seen corresponding path program 19 times [2022-03-20 13:30:31,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:31,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1217719937] [2022-03-20 13:30:31,175 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:30:31,175 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:30:31,175 INFO L85 PathProgramCache]: Analyzing trace with hash -2021132114, now seen corresponding path program 1 times [2022-03-20 13:30:31,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:30:31,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012425781] [2022-03-20 13:30:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:31,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:30:31,180 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:30:31,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461647368] [2022-03-20 13:30:31,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:31,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:31,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:30:31,181 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 13:30:31,182 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 13:30:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:31,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 13:30:31,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:30:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:30:31,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:30:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:30:32,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:30:32,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012425781] [2022-03-20 13:30:32,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:30:32,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461647368] [2022-03-20 13:30:32,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461647368] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:30:32,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:30:32,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-20 13:30:32,257 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:30:32,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1217719937] [2022-03-20 13:30:32,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1217719937] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:30:32,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:30:32,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 13:30:32,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862937002] [2022-03-20 13:30:32,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:30:32,258 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 13:30:32,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:32,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 13:30:32,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-20 13:30:32,259 INFO L87 Difference]: Start difference. First operand 148 states and 175 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:30:32,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:30:32,584 INFO L93 Difference]: Finished difference Result 163 states and 190 transitions. [2022-03-20 13:30:32,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 13:30:32,586 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-03-20 13:30:32,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:30:32,587 INFO L225 Difference]: With dead ends: 163 [2022-03-20 13:30:32,587 INFO L226 Difference]: Without dead ends: 151 [2022-03-20 13:30:32,588 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-03-20 13:30:32,588 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 40 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:30:32,589 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 862 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 371 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-03-20 13:30:32,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-20 13:30:32,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2022-03-20 13:30:32,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 134 states have internal predecessors, (148), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-03-20 13:30:32,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 174 transitions. [2022-03-20 13:30:32,644 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 174 transitions. Word has length 42 [2022-03-20 13:30:32,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:30:32,644 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 174 transitions. [2022-03-20 13:30:32,644 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:30:32,644 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 174 transitions. [2022-03-20 13:30:32,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 13:30:32,645 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:30:32,645 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:30:32,668 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 13:30:32,867 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,SelfDestructingSolverStorable26 [2022-03-20 13:30:32,867 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:30:32,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:30:32,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1821118963, now seen corresponding path program 20 times [2022-03-20 13:30:32,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:32,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1666844581] [2022-03-20 13:30:32,903 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:30:32,904 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:30:32,904 INFO L85 PathProgramCache]: Analyzing trace with hash -335823346, now seen corresponding path program 1 times [2022-03-20 13:30:32,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:30:32,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81503063] [2022-03-20 13:30:32,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:32,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:30:32,909 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:30:32,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152402085] [2022-03-20 13:30:32,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:32,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:32,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:30:32,911 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 13:30:32,912 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 13:30:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:32,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 13:30:32,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:30:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 13:30:33,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:30:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 13:30:33,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:30:33,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81503063] [2022-03-20 13:30:33,464 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:30:33,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152402085] [2022-03-20 13:30:33,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152402085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:30:33,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:30:33,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 30 [2022-03-20 13:30:33,488 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:30:33,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1666844581] [2022-03-20 13:30:33,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1666844581] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:30:33,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:30:33,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 13:30:33,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852331878] [2022-03-20 13:30:33,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:30:33,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 13:30:33,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:33,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 13:30:33,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2022-03-20 13:30:33,490 INFO L87 Difference]: Start difference. First operand 149 states and 174 transitions. Second operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:30:33,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:30:33,737 INFO L93 Difference]: Finished difference Result 167 states and 195 transitions. [2022-03-20 13:30:33,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 13:30:33,737 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-03-20 13:30:33,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:30:33,739 INFO L225 Difference]: With dead ends: 167 [2022-03-20 13:30:33,739 INFO L226 Difference]: Without dead ends: 161 [2022-03-20 13:30:33,740 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 13:30:33,740 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:30:33,741 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 561 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:30:33,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-20 13:30:33,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2022-03-20 13:30:33,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 129 states have (on average 1.2170542635658914) internal successors, (157), 143 states have internal predecessors, (157), 12 states have call successors, (12), 5 states have call predecessors, (12), 17 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2022-03-20 13:30:33,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 187 transitions. [2022-03-20 13:30:33,800 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 187 transitions. Word has length 43 [2022-03-20 13:30:33,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:30:33,800 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 187 transitions. [2022-03-20 13:30:33,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:30:33,800 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 187 transitions. [2022-03-20 13:30:33,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 13:30:33,801 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:30:33,802 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:30:33,826 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 13:30:34,024 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,SelfDestructingSolverStorable27 [2022-03-20 13:30:34,024 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:30:34,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:30:34,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1243243306, now seen corresponding path program 21 times [2022-03-20 13:30:34,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:34,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2121821343] [2022-03-20 13:30:34,056 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:30:34,056 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:30:34,056 INFO L85 PathProgramCache]: Analyzing trace with hash 412169067, now seen corresponding path program 1 times [2022-03-20 13:30:34,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:30:34,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667270070] [2022-03-20 13:30:34,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:34,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:30:34,062 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:30:34,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866536236] [2022-03-20 13:30:34,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:34,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:34,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:30:34,063 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 13:30:34,070 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 13:30:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:34,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 13:30:34,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:30:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:30:34,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:30:34,628 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:30:34,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:30:34,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667270070] [2022-03-20 13:30:34,628 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:30:34,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866536236] [2022-03-20 13:30:34,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866536236] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:30:34,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:30:34,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 28 [2022-03-20 13:30:34,655 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:30:34,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2121821343] [2022-03-20 13:30:34,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2121821343] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:30:34,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:30:34,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 13:30:34,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503438412] [2022-03-20 13:30:34,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:30:34,655 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 13:30:34,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:34,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 13:30:34,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=748, Unknown=0, NotChecked=0, Total=812 [2022-03-20 13:30:34,656 INFO L87 Difference]: Start difference. First operand 159 states and 187 transitions. Second operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:30:35,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:30:35,008 INFO L93 Difference]: Finished difference Result 208 states and 245 transitions. [2022-03-20 13:30:35,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 13:30:35,009 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-03-20 13:30:35,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:30:35,010 INFO L225 Difference]: With dead ends: 208 [2022-03-20 13:30:35,010 INFO L226 Difference]: Without dead ends: 202 [2022-03-20 13:30:35,011 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 13:30:35,012 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 60 mSDsluCounter, 1422 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:30:35,012 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1491 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:30:35,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-20 13:30:35,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 175. [2022-03-20 13:30:35,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 142 states have (on average 1.2183098591549295) internal successors, (173), 158 states have internal predecessors, (173), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (21), 11 states have call predecessors, (21), 11 states have call successors, (21) [2022-03-20 13:30:35,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 207 transitions. [2022-03-20 13:30:35,081 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 207 transitions. Word has length 43 [2022-03-20 13:30:35,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:30:35,082 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 207 transitions. [2022-03-20 13:30:35,082 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:30:35,082 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 207 transitions. [2022-03-20 13:30:35,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 13:30:35,083 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:30:35,083 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:30:35,110 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 13:30:35,296 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,SelfDestructingSolverStorable28 [2022-03-20 13:30:35,296 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:30:35,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:30:35,297 INFO L85 PathProgramCache]: Analyzing trace with hash 729023853, now seen corresponding path program 22 times [2022-03-20 13:30:35,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:35,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [543932266] [2022-03-20 13:30:35,331 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:30:35,331 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:30:35,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1942504716, now seen corresponding path program 1 times [2022-03-20 13:30:35,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:30:35,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266285750] [2022-03-20 13:30:35,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:35,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:30:35,336 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:30:35,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488547803] [2022-03-20 13:30:35,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:35,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:35,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:30:35,337 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 13:30:35,339 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 13:30:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:35,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:30:35,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:30:35,479 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 13:30:35,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:30:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 13:30:35,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:30:35,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266285750] [2022-03-20 13:30:35,586 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:30:35,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488547803] [2022-03-20 13:30:35,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488547803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:30:35,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:30:35,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-03-20 13:30:35,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:30:35,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [543932266] [2022-03-20 13:30:35,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [543932266] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:30:35,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:30:35,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 13:30:35,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143747210] [2022-03-20 13:30:35,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:30:35,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 13:30:35,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:35,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 13:30:35,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-03-20 13:30:35,604 INFO L87 Difference]: Start difference. First operand 175 states and 207 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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 13:30:35,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:30:35,750 INFO L93 Difference]: Finished difference Result 235 states and 280 transitions. [2022-03-20 13:30:35,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 13:30:35,751 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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 44 [2022-03-20 13:30:35,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:30:35,752 INFO L225 Difference]: With dead ends: 235 [2022-03-20 13:30:35,752 INFO L226 Difference]: Without dead ends: 213 [2022-03-20 13:30:35,753 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2022-03-20 13:30:35,754 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 49 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:30:35,754 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 233 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:30:35,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-20 13:30:35,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 201. [2022-03-20 13:30:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 168 states have (on average 1.2142857142857142) internal successors, (204), 184 states have internal predecessors, (204), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (21), 11 states have call predecessors, (21), 11 states have call successors, (21) [2022-03-20 13:30:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 238 transitions. [2022-03-20 13:30:35,829 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 238 transitions. Word has length 44 [2022-03-20 13:30:35,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:30:35,830 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 238 transitions. [2022-03-20 13:30:35,830 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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 13:30:35,830 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 238 transitions. [2022-03-20 13:30:35,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 13:30:35,832 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:30:35,832 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:30:35,857 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 13:30:36,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:36,047 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:30:36,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:30:36,048 INFO L85 PathProgramCache]: Analyzing trace with hash 783256622, now seen corresponding path program 23 times [2022-03-20 13:30:36,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:36,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1888035146] [2022-03-20 13:30:36,079 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:30:36,080 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:30:36,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1091251315, now seen corresponding path program 1 times [2022-03-20 13:30:36,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:30:36,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321786880] [2022-03-20 13:30:36,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:36,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:30:36,089 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:30:36,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398913767] [2022-03-20 13:30:36,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:36,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:36,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:30:36,091 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 13:30:36,099 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 13:30:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:36,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 13:30:36,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:30:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 13:30:47,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:30:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 13:30:50,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:30:50,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321786880] [2022-03-20 13:30:50,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:30:50,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398913767] [2022-03-20 13:30:50,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398913767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:30:50,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:30:50,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2022-03-20 13:30:51,471 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:30:51,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1888035146] [2022-03-20 13:30:51,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1888035146] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:30:51,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:30:51,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 13:30:51,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423237322] [2022-03-20 13:30:51,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:30:51,472 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 13:30:51,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:51,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 13:30:51,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1023, Unknown=3, NotChecked=0, Total=1190 [2022-03-20 13:30:51,473 INFO L87 Difference]: Start difference. First operand 201 states and 238 transitions. Second operand has 22 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 21 states have internal predecessors, (34), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:30:51,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:30:51,747 INFO L93 Difference]: Finished difference Result 239 states and 284 transitions. [2022-03-20 13:30:51,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 13:30:51,748 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 21 states have internal predecessors, (34), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 44 [2022-03-20 13:30:51,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:30:51,750 INFO L225 Difference]: With dead ends: 239 [2022-03-20 13:30:51,750 INFO L226 Difference]: Without dead ends: 225 [2022-03-20 13:30:51,752 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=188, Invalid=1141, Unknown=3, NotChecked=0, Total=1332 [2022-03-20 13:30:51,752 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 31 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:30:51,752 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 682 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 83 Unchecked, 0.1s Time] [2022-03-20 13:30:51,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-20 13:30:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2022-03-20 13:30:51,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 181 states have (on average 1.2099447513812154) internal successors, (219), 203 states have internal predecessors, (219), 16 states have call successors, (16), 5 states have call predecessors, (16), 25 states have return successors, (30), 14 states have call predecessors, (30), 14 states have call successors, (30) [2022-03-20 13:30:51,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 265 transitions. [2022-03-20 13:30:51,842 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 265 transitions. Word has length 44 [2022-03-20 13:30:51,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:30:51,842 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 265 transitions. [2022-03-20 13:30:51,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 21 states have internal predecessors, (34), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:30:51,842 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 265 transitions. [2022-03-20 13:30:51,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 13:30:51,845 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:30:51,845 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:30:51,869 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 13:30:52,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:52,059 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:30:52,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:30:52,060 INFO L85 PathProgramCache]: Analyzing trace with hash 671021120, now seen corresponding path program 24 times [2022-03-20 13:30:52,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:52,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [832641268] [2022-03-20 13:30:52,088 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:30:52,088 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:30:52,089 INFO L85 PathProgramCache]: Analyzing trace with hash 3491679, now seen corresponding path program 1 times [2022-03-20 13:30:52,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:30:52,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376086106] [2022-03-20 13:30:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:52,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:30:52,094 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:30:52,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495623680] [2022-03-20 13:30:52,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:52,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:52,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:30:52,096 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 13:30:52,099 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 13:30:52,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:52,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 13:30:52,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:30:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:30:52,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:30:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:30:52,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:30:52,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376086106] [2022-03-20 13:30:52,715 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:30:52,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495623680] [2022-03-20 13:30:52,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495623680] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:30:52,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:30:52,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 30 [2022-03-20 13:30:52,742 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:30:52,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [832641268] [2022-03-20 13:30:52,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [832641268] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:30:52,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:30:52,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 13:30:52,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636859828] [2022-03-20 13:30:52,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:30:52,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 13:30:52,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:52,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 13:30:52,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2022-03-20 13:30:52,744 INFO L87 Difference]: Start difference. First operand 223 states and 265 transitions. Second operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:30:53,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:30:53,242 INFO L93 Difference]: Finished difference Result 229 states and 270 transitions. [2022-03-20 13:30:53,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 13:30:53,242 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-03-20 13:30:53,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:30:53,243 INFO L225 Difference]: With dead ends: 229 [2022-03-20 13:30:53,243 INFO L226 Difference]: Without dead ends: 211 [2022-03-20 13:30:53,245 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 13:30:53,245 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 47 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:30:53,245 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1226 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:30:53,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-20 13:30:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-03-20 13:30:53,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 172 states have (on average 1.2093023255813953) internal successors, (208), 192 states have internal predecessors, (208), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (28), 13 states have call predecessors, (28), 13 states have call successors, (28) [2022-03-20 13:30:53,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 251 transitions. [2022-03-20 13:30:53,332 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 251 transitions. Word has length 44 [2022-03-20 13:30:53,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:30:53,333 INFO L478 AbstractCegarLoop]: Abstraction has 211 states and 251 transitions. [2022-03-20 13:30:53,333 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:30:53,335 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 251 transitions. [2022-03-20 13:30:53,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 13:30:53,338 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:30:53,338 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:30:53,365 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 13:30:53,558 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-20 13:30:53,559 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:30:53,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:30:53,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1133635601, now seen corresponding path program 25 times [2022-03-20 13:30:53,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:53,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1578575284] [2022-03-20 13:30:53,592 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:30:53,592 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:30:53,593 INFO L85 PathProgramCache]: Analyzing trace with hash -594186546, now seen corresponding path program 1 times [2022-03-20 13:30:53,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:30:53,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011820257] [2022-03-20 13:30:53,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:53,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:30:53,599 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:30:53,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341068874] [2022-03-20 13:30:53,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:53,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:53,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:30:53,601 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 13:30:53,602 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 13:30:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:53,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 13:30:53,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:30:54,121 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:30:54,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:30:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:30:54,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:30:54,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011820257] [2022-03-20 13:30:54,857 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:30:54,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341068874] [2022-03-20 13:30:54,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341068874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:30:54,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:30:54,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-03-20 13:30:55,154 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:30:55,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1578575284] [2022-03-20 13:30:55,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1578575284] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:30:55,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:30:55,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 13:30:55,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553047098] [2022-03-20 13:30:55,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:30:55,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 13:30:55,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:55,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 13:30:55,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-03-20 13:30:55,155 INFO L87 Difference]: Start difference. First operand 211 states and 251 transitions. Second operand has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:30:55,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:30:55,902 INFO L93 Difference]: Finished difference Result 263 states and 318 transitions. [2022-03-20 13:30:55,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 13:30:55,904 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-03-20 13:30:55,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:30:55,907 INFO L225 Difference]: With dead ends: 263 [2022-03-20 13:30:55,907 INFO L226 Difference]: Without dead ends: 252 [2022-03-20 13:30:55,909 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 13:30:55,909 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 85 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:30:55,909 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 785 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 343 Invalid, 0 Unknown, 33 Unchecked, 0.3s Time] [2022-03-20 13:30:55,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-20 13:30:56,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 243. [2022-03-20 13:30:56,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 198 states have (on average 1.207070707070707) internal successors, (239), 222 states have internal predecessors, (239), 17 states have call successors, (17), 5 states have call predecessors, (17), 27 states have return successors, (36), 15 states have call predecessors, (36), 15 states have call successors, (36) [2022-03-20 13:30:56,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 292 transitions. [2022-03-20 13:30:56,008 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 292 transitions. Word has length 44 [2022-03-20 13:30:56,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:30:56,008 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 292 transitions. [2022-03-20 13:30:56,008 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:30:56,009 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 292 transitions. [2022-03-20 13:30:56,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 13:30:56,011 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:30:56,011 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:30:56,041 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 13:30:56,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:56,223 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:30:56,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:30:56,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1915733740, now seen corresponding path program 26 times [2022-03-20 13:30:56,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:56,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [503099564] [2022-03-20 13:30:56,266 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:30:56,266 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:30:56,267 INFO L85 PathProgramCache]: Analyzing trace with hash -632806005, now seen corresponding path program 1 times [2022-03-20 13:30:56,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:30:56,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525644857] [2022-03-20 13:30:56,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:56,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:30:56,272 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:30:56,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548658246] [2022-03-20 13:30:56,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:56,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:56,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:30:56,274 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 13:30:56,275 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 13:30:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:56,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 13:30:56,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:30:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:30:56,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:30:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:30:57,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:30:57,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525644857] [2022-03-20 13:30:57,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:30:57,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548658246] [2022-03-20 13:30:57,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548658246] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:30:57,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:30:57,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-03-20 13:30:57,907 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:30:57,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [503099564] [2022-03-20 13:30:57,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [503099564] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:30:57,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:30:57,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 13:30:57,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410686251] [2022-03-20 13:30:57,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:30:57,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 13:30:57,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:57,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 13:30:57,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-03-20 13:30:57,909 INFO L87 Difference]: Start difference. First operand 243 states and 292 transitions. Second operand has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:30:58,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:30:58,424 INFO L93 Difference]: Finished difference Result 258 states and 307 transitions. [2022-03-20 13:30:58,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 13:30:58,426 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-03-20 13:30:58,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:30:58,428 INFO L225 Difference]: With dead ends: 258 [2022-03-20 13:30:58,428 INFO L226 Difference]: Without dead ends: 246 [2022-03-20 13:30:58,429 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-03-20 13:30:58,430 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 52 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:30:58,430 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 1143 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 494 Invalid, 0 Unknown, 36 Unchecked, 0.4s Time] [2022-03-20 13:30:58,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-03-20 13:30:58,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2022-03-20 13:30:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 199 states have (on average 1.2060301507537687) internal successors, (240), 223 states have internal predecessors, (240), 17 states have call successors, (17), 5 states have call predecessors, (17), 27 states have return successors, (32), 15 states have call predecessors, (32), 15 states have call successors, (32) [2022-03-20 13:30:58,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 289 transitions. [2022-03-20 13:30:58,539 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 289 transitions. Word has length 44 [2022-03-20 13:30:58,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:30:58,539 INFO L478 AbstractCegarLoop]: Abstraction has 244 states and 289 transitions. [2022-03-20 13:30:58,539 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:30:58,540 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 289 transitions. [2022-03-20 13:30:58,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 13:30:58,543 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:30:58,543 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:30:58,569 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 13:30:58,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:58,759 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:30:58,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:30:58,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1154646049, now seen corresponding path program 27 times [2022-03-20 13:30:58,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:58,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1592360552] [2022-03-20 13:30:58,789 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:30:58,790 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:30:58,790 INFO L85 PathProgramCache]: Analyzing trace with hash 206628192, now seen corresponding path program 1 times [2022-03-20 13:30:58,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:30:58,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636724504] [2022-03-20 13:30:58,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:58,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:30:58,796 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:30:58,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745638741] [2022-03-20 13:30:58,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:58,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:58,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:30:58,797 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 13:30:58,799 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 13:30:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:58,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 13:30:58,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:31:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 13:31:03,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:31:05,959 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 13:31:05,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:31:05,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636724504] [2022-03-20 13:31:05,959 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:31:05,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745638741] [2022-03-20 13:31:05,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745638741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:31:05,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:31:05,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2022-03-20 13:31:06,812 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:31:06,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1592360552] [2022-03-20 13:31:06,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1592360552] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:31:06,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:31:06,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 13:31:06,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883636611] [2022-03-20 13:31:06,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:31:06,812 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 13:31:06,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:06,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 13:31:06,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 13:31:06,813 INFO L87 Difference]: Start difference. First operand 244 states and 289 transitions. Second operand has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:31:06,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:31:06,984 INFO L93 Difference]: Finished difference Result 250 states and 294 transitions. [2022-03-20 13:31:06,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 13:31:06,985 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-03-20 13:31:06,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:31:06,987 INFO L225 Difference]: With dead ends: 250 [2022-03-20 13:31:06,987 INFO L226 Difference]: Without dead ends: 239 [2022-03-20 13:31:06,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 13:31:06,989 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 27 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:31:06,989 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 733 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 136 Unchecked, 0.1s Time] [2022-03-20 13:31:06,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-03-20 13:31:07,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2022-03-20 13:31:07,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 193 states have (on average 1.2020725388601037) internal successors, (232), 215 states have internal predecessors, (232), 16 states have call successors, (16), 5 states have call predecessors, (16), 25 states have return successors, (25), 14 states have call predecessors, (25), 14 states have call successors, (25) [2022-03-20 13:31:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 273 transitions. [2022-03-20 13:31:07,122 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 273 transitions. Word has length 45 [2022-03-20 13:31:07,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:31:07,122 INFO L478 AbstractCegarLoop]: Abstraction has 235 states and 273 transitions. [2022-03-20 13:31:07,122 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:31:07,122 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 273 transitions. [2022-03-20 13:31:07,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 13:31:07,124 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:31:07,124 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:31:07,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 13:31:07,339 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,SelfDestructingSolverStorable34 [2022-03-20 13:31:07,339 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:31:07,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:31:07,340 INFO L85 PathProgramCache]: Analyzing trace with hash 713065306, now seen corresponding path program 28 times [2022-03-20 13:31:07,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:07,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [347364284] [2022-03-20 13:31:07,377 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:31:07,377 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:31:07,378 INFO L85 PathProgramCache]: Analyzing trace with hash 835967259, now seen corresponding path program 1 times [2022-03-20 13:31:07,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:31:07,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610968393] [2022-03-20 13:31:07,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:07,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:31:07,382 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:31:07,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046072278] [2022-03-20 13:31:07,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:07,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:07,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:31:07,383 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 13:31:07,384 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 13:31:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:07,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 13:31:07,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:31:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 13:31:07,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:31:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 13:31:07,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:31:07,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610968393] [2022-03-20 13:31:07,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:31:07,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046072278] [2022-03-20 13:31:07,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046072278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:31:07,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:31:07,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-03-20 13:31:07,730 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:31:07,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [347364284] [2022-03-20 13:31:07,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [347364284] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:31:07,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:31:07,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 13:31:07,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893721634] [2022-03-20 13:31:07,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:31:07,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 13:31:07,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:07,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 13:31:07,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-03-20 13:31:07,731 INFO L87 Difference]: Start difference. First operand 235 states and 273 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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 13:31:07,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:31:07,847 INFO L93 Difference]: Finished difference Result 261 states and 303 transitions. [2022-03-20 13:31:07,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 13:31:07,847 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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 45 [2022-03-20 13:31:07,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:31:07,848 INFO L225 Difference]: With dead ends: 261 [2022-03-20 13:31:07,848 INFO L226 Difference]: Without dead ends: 240 [2022-03-20 13:31:07,850 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-03-20 13:31:07,850 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 38 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:31:07,850 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 227 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:31:07,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-03-20 13:31:07,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-03-20 13:31:07,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 198 states have (on average 1.196969696969697) internal successors, (237), 220 states have internal predecessors, (237), 16 states have call successors, (16), 5 states have call predecessors, (16), 25 states have return successors, (25), 14 states have call predecessors, (25), 14 states have call successors, (25) [2022-03-20 13:31:07,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 278 transitions. [2022-03-20 13:31:07,948 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 278 transitions. Word has length 45 [2022-03-20 13:31:07,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:31:07,948 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 278 transitions. [2022-03-20 13:31:07,948 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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 13:31:07,948 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 278 transitions. [2022-03-20 13:31:07,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 13:31:07,950 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:31:07,950 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:31:07,975 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 13:31:08,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 13:31:08,163 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:31:08,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:31:08,164 INFO L85 PathProgramCache]: Analyzing trace with hash 200538666, now seen corresponding path program 29 times [2022-03-20 13:31:08,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:08,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1051785887] [2022-03-20 13:31:08,208 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:31:08,208 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:31:08,208 INFO L85 PathProgramCache]: Analyzing trace with hash -914931669, now seen corresponding path program 1 times [2022-03-20 13:31:08,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:31:08,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140324858] [2022-03-20 13:31:08,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:08,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:31:08,213 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:31:08,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763499402] [2022-03-20 13:31:08,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:08,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:08,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:31:08,215 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 13:31:08,218 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 13:31:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:08,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 13:31:08,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:31:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 13:31:08,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:31:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 13:31:08,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:31:08,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140324858] [2022-03-20 13:31:08,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:31:08,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763499402] [2022-03-20 13:31:08,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763499402] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:31:08,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:31:08,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 32 [2022-03-20 13:31:08,896 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:31:08,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1051785887] [2022-03-20 13:31:08,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1051785887] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:31:08,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:31:08,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 13:31:08,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030321534] [2022-03-20 13:31:08,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:31:08,897 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 13:31:08,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:08,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 13:31:08,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=976, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 13:31:08,898 INFO L87 Difference]: Start difference. First operand 240 states and 278 transitions. Second operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:31:09,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:31:09,255 INFO L93 Difference]: Finished difference Result 246 states and 283 transitions. [2022-03-20 13:31:09,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 13:31:09,255 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-03-20 13:31:09,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:31:09,257 INFO L225 Difference]: With dead ends: 246 [2022-03-20 13:31:09,257 INFO L226 Difference]: Without dead ends: 227 [2022-03-20 13:31:09,258 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=1302, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 13:31:09,259 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 35 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:31:09,259 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 765 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:31:09,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-20 13:31:09,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-03-20 13:31:09,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 188 states have (on average 1.196808510638298) internal successors, (225), 208 states have internal predecessors, (225), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (23), 13 states have call predecessors, (23), 13 states have call successors, (23) [2022-03-20 13:31:09,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 263 transitions. [2022-03-20 13:31:09,359 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 263 transitions. Word has length 45 [2022-03-20 13:31:09,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:31:09,359 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 263 transitions. [2022-03-20 13:31:09,360 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:31:09,360 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 263 transitions. [2022-03-20 13:31:09,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 13:31:09,361 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:31:09,361 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:31:09,384 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 13:31:09,580 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,SelfDestructingSolverStorable36 [2022-03-20 13:31:09,580 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:31:09,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:31:09,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1761268627, now seen corresponding path program 30 times [2022-03-20 13:31:09,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:09,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [532708465] [2022-03-20 13:31:09,617 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:31:09,618 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:31:09,618 INFO L85 PathProgramCache]: Analyzing trace with hash 179856046, now seen corresponding path program 1 times [2022-03-20 13:31:09,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:31:09,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381956783] [2022-03-20 13:31:09,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:09,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:31:09,623 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:31:09,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399643192] [2022-03-20 13:31:09,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:09,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:09,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:31:09,625 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 13:31:09,626 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 13:31:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:09,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 13:31:09,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:31:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:31:10,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:31:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:31:10,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:31:10,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381956783] [2022-03-20 13:31:10,280 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:31:10,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399643192] [2022-03-20 13:31:10,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399643192] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:31:10,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:31:10,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 30 [2022-03-20 13:31:10,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:31:10,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [532708465] [2022-03-20 13:31:10,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [532708465] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:31:10,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:31:10,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 13:31:10,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383458480] [2022-03-20 13:31:10,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:31:10,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 13:31:10,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:10,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 13:31:10,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=862, Unknown=0, NotChecked=0, Total=930 [2022-03-20 13:31:10,309 INFO L87 Difference]: Start difference. First operand 227 states and 263 transitions. Second operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:31:10,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:31:10,765 INFO L93 Difference]: Finished difference Result 290 states and 337 transitions. [2022-03-20 13:31:10,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 13:31:10,765 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-03-20 13:31:10,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:31:10,767 INFO L225 Difference]: With dead ends: 290 [2022-03-20 13:31:10,767 INFO L226 Difference]: Without dead ends: 284 [2022-03-20 13:31:10,769 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=1168, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 13:31:10,769 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 72 mSDsluCounter, 1684 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:31:10,769 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 1765 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:31:10,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-03-20 13:31:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 243. [2022-03-20 13:31:10,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 201 states have (on average 1.199004975124378) internal successors, (241), 223 states have internal predecessors, (241), 16 states have call successors, (16), 5 states have call predecessors, (16), 25 states have return successors, (26), 14 states have call predecessors, (26), 14 states have call successors, (26) [2022-03-20 13:31:10,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 283 transitions. [2022-03-20 13:31:10,880 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 283 transitions. Word has length 45 [2022-03-20 13:31:10,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:31:10,880 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 283 transitions. [2022-03-20 13:31:10,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:31:10,880 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 283 transitions. [2022-03-20 13:31:10,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 13:31:10,882 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:31:10,882 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:31:10,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-20 13:31:11,092 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:11,092 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:31:11,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:31:11,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1979324864, now seen corresponding path program 31 times [2022-03-20 13:31:11,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:11,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1404179914] [2022-03-20 13:31:11,150 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:31:11,151 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:31:11,151 INFO L85 PathProgramCache]: Analyzing trace with hash -2005154977, now seen corresponding path program 1 times [2022-03-20 13:31:11,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:31:11,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971897310] [2022-03-20 13:31:11,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:11,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:31:11,156 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:31:11,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499338944] [2022-03-20 13:31:11,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:11,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:11,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:31:11,158 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 13:31:11,159 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 13:31:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:11,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 13:31:11,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:31:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:31:11,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:31:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:31:11,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:31:11,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971897310] [2022-03-20 13:31:11,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:31:11,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499338944] [2022-03-20 13:31:11,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499338944] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:31:11,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:31:11,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 34 [2022-03-20 13:31:11,907 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:31:11,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1404179914] [2022-03-20 13:31:11,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1404179914] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:31:11,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:31:11,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 13:31:11,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388254710] [2022-03-20 13:31:11,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:31:11,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 13:31:11,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:11,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 13:31:11,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1102, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 13:31:11,908 INFO L87 Difference]: Start difference. First operand 243 states and 283 transitions. Second operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:31:12,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:31:12,267 INFO L93 Difference]: Finished difference Result 261 states and 304 transitions. [2022-03-20 13:31:12,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 13:31:12,267 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-03-20 13:31:12,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:31:12,269 INFO L225 Difference]: With dead ends: 261 [2022-03-20 13:31:12,269 INFO L226 Difference]: Without dead ends: 255 [2022-03-20 13:31:12,270 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=1448, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 13:31:12,270 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:31:12,271 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 613 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:31:12,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-20 13:31:12,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 253. [2022-03-20 13:31:12,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 208 states have (on average 1.2019230769230769) internal successors, (250), 232 states have internal predecessors, (250), 17 states have call successors, (17), 5 states have call predecessors, (17), 27 states have return successors, (29), 15 states have call predecessors, (29), 15 states have call successors, (29) [2022-03-20 13:31:12,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 296 transitions. [2022-03-20 13:31:12,376 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 296 transitions. Word has length 46 [2022-03-20 13:31:12,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:31:12,377 INFO L478 AbstractCegarLoop]: Abstraction has 253 states and 296 transitions. [2022-03-20 13:31:12,377 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:31:12,377 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 296 transitions. [2022-03-20 13:31:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 13:31:12,378 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:31:12,378 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:31:12,397 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 13:31:12,586 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,SelfDestructingSolverStorable38 [2022-03-20 13:31:12,587 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:31:12,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:31:12,587 INFO L85 PathProgramCache]: Analyzing trace with hash -2013243203, now seen corresponding path program 32 times [2022-03-20 13:31:12,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:12,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [324751109] [2022-03-20 13:31:12,631 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:31:12,632 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:31:12,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1437591012, now seen corresponding path program 1 times [2022-03-20 13:31:12,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:31:12,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661533877] [2022-03-20 13:31:12,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:12,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:31:12,636 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:31:12,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116374000] [2022-03-20 13:31:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:12,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:12,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:31:12,638 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 13:31:12,640 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 13:31:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:12,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 13:31:12,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:31:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:31:13,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:31:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:31:13,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:31:13,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661533877] [2022-03-20 13:31:13,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:31:13,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116374000] [2022-03-20 13:31:13,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116374000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:31:13,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:31:13,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 32 [2022-03-20 13:31:13,366 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:31:13,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [324751109] [2022-03-20 13:31:13,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [324751109] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:31:13,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:31:13,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 13:31:13,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138371510] [2022-03-20 13:31:13,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:31:13,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 13:31:13,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:13,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 13:31:13,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=980, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 13:31:13,368 INFO L87 Difference]: Start difference. First operand 253 states and 296 transitions. Second operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:31:13,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:31:13,885 INFO L93 Difference]: Finished difference Result 259 states and 301 transitions. [2022-03-20 13:31:13,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 13:31:13,886 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-03-20 13:31:13,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:31:13,887 INFO L225 Difference]: With dead ends: 259 [2022-03-20 13:31:13,887 INFO L226 Difference]: Without dead ends: 241 [2022-03-20 13:31:13,889 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 53 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=1306, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 13:31:13,889 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 59 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:31:13,889 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1488 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:31:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-03-20 13:31:13,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-03-20 13:31:13,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 199 states have (on average 1.2010050251256281) internal successors, (239), 221 states have internal predecessors, (239), 16 states have call successors, (16), 5 states have call predecessors, (16), 25 states have return successors, (27), 14 states have call predecessors, (27), 14 states have call successors, (27) [2022-03-20 13:31:13,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 282 transitions. [2022-03-20 13:31:13,993 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 282 transitions. Word has length 46 [2022-03-20 13:31:13,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:31:13,994 INFO L478 AbstractCegarLoop]: Abstraction has 241 states and 282 transitions. [2022-03-20 13:31:13,994 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:31:13,994 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 282 transitions. [2022-03-20 13:31:13,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 13:31:13,995 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:31:13,995 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:31:14,011 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 13:31:14,196 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,SelfDestructingSolverStorable39 [2022-03-20 13:31:14,196 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:31:14,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:31:14,196 INFO L85 PathProgramCache]: Analyzing trace with hash 215774988, now seen corresponding path program 33 times [2022-03-20 13:31:14,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:14,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [222304933] [2022-03-20 13:31:14,229 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:31:14,229 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:31:14,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1056591915, now seen corresponding path program 1 times [2022-03-20 13:31:14,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:31:14,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421739121] [2022-03-20 13:31:14,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:14,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:31:14,235 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:31:14,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360962687] [2022-03-20 13:31:14,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:14,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:14,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:31:14,236 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 13:31:14,248 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 13:31:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:14,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 13:31:14,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:31:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:31:14,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:31:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:31:15,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:31:15,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421739121] [2022-03-20 13:31:15,821 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:31:15,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360962687] [2022-03-20 13:31:15,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360962687] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:31:15,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:31:15,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2022-03-20 13:31:16,188 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:31:16,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [222304933] [2022-03-20 13:31:16,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [222304933] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:31:16,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:31:16,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 13:31:16,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194135165] [2022-03-20 13:31:16,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:31:16,189 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 13:31:16,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:16,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 13:31:16,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 13:31:16,190 INFO L87 Difference]: Start difference. First operand 241 states and 282 transitions. Second operand has 22 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:31:17,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:31:17,178 INFO L93 Difference]: Finished difference Result 294 states and 347 transitions. [2022-03-20 13:31:17,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 13:31:17,179 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-03-20 13:31:17,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:31:17,181 INFO L225 Difference]: With dead ends: 294 [2022-03-20 13:31:17,181 INFO L226 Difference]: Without dead ends: 283 [2022-03-20 13:31:17,184 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=263, Invalid=1629, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 13:31:17,184 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 121 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:31:17,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 914 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 417 Invalid, 0 Unknown, 38 Unchecked, 0.3s Time] [2022-03-20 13:31:17,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-20 13:31:17,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 274. [2022-03-20 13:31:17,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 226 states have (on average 1.1991150442477876) internal successors, (271), 252 states have internal predecessors, (271), 18 states have call successors, (18), 5 states have call predecessors, (18), 29 states have return successors, (33), 16 states have call predecessors, (33), 16 states have call successors, (33) [2022-03-20 13:31:17,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 322 transitions. [2022-03-20 13:31:17,311 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 322 transitions. Word has length 46 [2022-03-20 13:31:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:31:17,312 INFO L478 AbstractCegarLoop]: Abstraction has 274 states and 322 transitions. [2022-03-20 13:31:17,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:31:17,312 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 322 transitions. [2022-03-20 13:31:17,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 13:31:17,314 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:31:17,314 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:31:17,337 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 13:31:17,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:17,527 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:31:17,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:31:17,528 INFO L85 PathProgramCache]: Analyzing trace with hash 256944047, now seen corresponding path program 34 times [2022-03-20 13:31:17,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:17,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [275672715] [2022-03-20 13:31:17,560 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:31:17,560 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:31:17,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1362925710, now seen corresponding path program 1 times [2022-03-20 13:31:17,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:31:17,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621441522] [2022-03-20 13:31:17,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:17,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:31:17,566 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:31:17,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30911825] [2022-03-20 13:31:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:17,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:17,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:31:17,567 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 13:31:17,568 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 13:31:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:17,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 13:31:17,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:31:18,277 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:31:18,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:31:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:31:19,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:31:19,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621441522] [2022-03-20 13:31:19,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:31:19,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30911825] [2022-03-20 13:31:19,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30911825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:31:19,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:31:19,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2022-03-20 13:31:19,643 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:31:19,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [275672715] [2022-03-20 13:31:19,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [275672715] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:31:19,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:31:19,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 13:31:19,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101998263] [2022-03-20 13:31:19,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:31:19,643 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 13:31:19,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:19,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 13:31:19,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 13:31:19,644 INFO L87 Difference]: Start difference. First operand 274 states and 322 transitions. Second operand has 22 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:31:20,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:31:20,337 INFO L93 Difference]: Finished difference Result 289 states and 337 transitions. [2022-03-20 13:31:20,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 13:31:20,339 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-03-20 13:31:20,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:31:20,340 INFO L225 Difference]: With dead ends: 289 [2022-03-20 13:31:20,340 INFO L226 Difference]: Without dead ends: 277 [2022-03-20 13:31:20,343 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 13:31:20,343 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 64 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:31:20,343 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 1462 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 661 Invalid, 0 Unknown, 85 Unchecked, 0.5s Time] [2022-03-20 13:31:20,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-03-20 13:31:20,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 275. [2022-03-20 13:31:20,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 227 states have (on average 1.198237885462555) internal successors, (272), 253 states have internal predecessors, (272), 18 states have call successors, (18), 5 states have call predecessors, (18), 29 states have return successors, (30), 16 states have call predecessors, (30), 16 states have call successors, (30) [2022-03-20 13:31:20,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 320 transitions. [2022-03-20 13:31:20,485 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 320 transitions. Word has length 46 [2022-03-20 13:31:20,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:31:20,485 INFO L478 AbstractCegarLoop]: Abstraction has 275 states and 320 transitions. [2022-03-20 13:31:20,485 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:31:20,485 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 320 transitions. [2022-03-20 13:31:20,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 13:31:20,488 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:31:20,488 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:31:20,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-20 13:31:20,703 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,SelfDestructingSolverStorable41 [2022-03-20 13:31:20,703 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:31:20,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:31:20,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1716301798, now seen corresponding path program 35 times [2022-03-20 13:31:20,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:20,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1067856358] [2022-03-20 13:31:20,745 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:31:20,745 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:31:20,745 INFO L85 PathProgramCache]: Analyzing trace with hash 2134530907, now seen corresponding path program 1 times [2022-03-20 13:31:20,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:31:20,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024488191] [2022-03-20 13:31:20,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:20,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:31:20,751 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:31:20,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237211763] [2022-03-20 13:31:20,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:20,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:20,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:31:20,752 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 13:31:20,760 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 13:31:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:20,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 13:31:20,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:31:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 13:31:20,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:31:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 13:31:21,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:31:21,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024488191] [2022-03-20 13:31:21,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:31:21,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237211763] [2022-03-20 13:31:21,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237211763] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:31:21,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:31:21,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2022-03-20 13:31:21,149 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:31:21,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1067856358] [2022-03-20 13:31:21,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1067856358] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:31:21,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:31:21,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 13:31:21,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810116984] [2022-03-20 13:31:21,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:31:21,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 13:31:21,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:21,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 13:31:21,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-03-20 13:31:21,151 INFO L87 Difference]: Start difference. First operand 275 states and 320 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 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 13:31:21,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:31:21,442 INFO L93 Difference]: Finished difference Result 367 states and 431 transitions. [2022-03-20 13:31:21,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 13:31:21,443 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 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 47 [2022-03-20 13:31:21,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:31:21,445 INFO L225 Difference]: With dead ends: 367 [2022-03-20 13:31:21,445 INFO L226 Difference]: Without dead ends: 337 [2022-03-20 13:31:21,447 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2022-03-20 13:31:21,447 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 75 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:31:21,447 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 212 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:31:21,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-03-20 13:31:21,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 319. [2022-03-20 13:31:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 271 states have (on average 1.1918819188191883) internal successors, (323), 297 states have internal predecessors, (323), 18 states have call successors, (18), 5 states have call predecessors, (18), 29 states have return successors, (30), 16 states have call predecessors, (30), 16 states have call successors, (30) [2022-03-20 13:31:21,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 371 transitions. [2022-03-20 13:31:21,615 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 371 transitions. Word has length 47 [2022-03-20 13:31:21,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:31:21,617 INFO L478 AbstractCegarLoop]: Abstraction has 319 states and 371 transitions. [2022-03-20 13:31:21,617 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 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 13:31:21,617 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 371 transitions. [2022-03-20 13:31:21,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 13:31:21,620 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:31:21,620 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:31:21,646 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 13:31:21,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:21,835 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:31:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:31:21,836 INFO L85 PathProgramCache]: Analyzing trace with hash 348175359, now seen corresponding path program 36 times [2022-03-20 13:31:21,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:21,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [544584523] [2022-03-20 13:31:21,874 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:31:21,874 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:31:21,875 INFO L85 PathProgramCache]: Analyzing trace with hash -465787008, now seen corresponding path program 1 times [2022-03-20 13:31:21,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:31:21,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635207708] [2022-03-20 13:31:21,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:21,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:31:21,880 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:31:21,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101599167] [2022-03-20 13:31:21,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:21,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:21,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:31:21,881 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 13:31:21,890 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 13:31:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:21,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 13:31:21,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:31:31,276 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 13:31:31,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:31:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 13:31:34,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:31:34,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635207708] [2022-03-20 13:31:34,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:31:34,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101599167] [2022-03-20 13:31:34,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101599167] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:31:34,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:31:34,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2022-03-20 13:31:36,066 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:31:36,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [544584523] [2022-03-20 13:31:36,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [544584523] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:31:36,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:31:36,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 13:31:36,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042159538] [2022-03-20 13:31:36,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:31:36,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 13:31:36,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:36,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 13:31:36,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1285, Unknown=1, NotChecked=0, Total=1482 [2022-03-20 13:31:36,068 INFO L87 Difference]: Start difference. First operand 319 states and 371 transitions. Second operand has 24 states, 20 states have (on average 1.8) internal successors, (36), 23 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:31:38,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:31:38,212 INFO L93 Difference]: Finished difference Result 375 states and 441 transitions. [2022-03-20 13:31:38,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 13:31:38,213 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.8) internal successors, (36), 23 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-03-20 13:31:38,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:31:38,216 INFO L225 Difference]: With dead ends: 375 [2022-03-20 13:31:38,216 INFO L226 Difference]: Without dead ends: 360 [2022-03-20 13:31:38,218 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=223, Invalid=1416, Unknown=1, NotChecked=0, Total=1640 [2022-03-20 13:31:38,219 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 40 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:31:38,219 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 817 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 179 Invalid, 0 Unknown, 299 Unchecked, 0.1s Time] [2022-03-20 13:31:38,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-03-20 13:31:38,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 358. [2022-03-20 13:31:38,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 295 states have (on average 1.1898305084745762) internal successors, (351), 331 states have internal predecessors, (351), 23 states have call successors, (23), 5 states have call predecessors, (23), 39 states have return successors, (45), 21 states have call predecessors, (45), 21 states have call successors, (45) [2022-03-20 13:31:38,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 419 transitions. [2022-03-20 13:31:38,386 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 419 transitions. Word has length 47 [2022-03-20 13:31:38,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:31:38,387 INFO L478 AbstractCegarLoop]: Abstraction has 358 states and 419 transitions. [2022-03-20 13:31:38,387 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.8) internal successors, (36), 23 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:31:38,387 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 419 transitions. [2022-03-20 13:31:38,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 13:31:38,391 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:31:38,391 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:31:38,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-20 13:31:38,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:38,595 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:31:38,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:31:38,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1510099501, now seen corresponding path program 37 times [2022-03-20 13:31:38,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:38,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2117615545] [2022-03-20 13:31:38,638 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:31:38,639 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:31:38,639 INFO L85 PathProgramCache]: Analyzing trace with hash 326309358, now seen corresponding path program 1 times [2022-03-20 13:31:38,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:31:38,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910643608] [2022-03-20 13:31:38,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:38,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:31:38,644 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:31:38,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618617183] [2022-03-20 13:31:38,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:38,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:38,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:31:38,646 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 13:31:38,651 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 13:31:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:38,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 13:31:38,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:31:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 13:31:39,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:31:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 13:31:39,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:31:39,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910643608] [2022-03-20 13:31:39,382 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:31:39,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618617183] [2022-03-20 13:31:39,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618617183] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:31:39,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:31:39,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 34 [2022-03-20 13:31:39,415 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:31:39,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2117615545] [2022-03-20 13:31:39,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2117615545] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:31:39,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:31:39,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 13:31:39,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551270579] [2022-03-20 13:31:39,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:31:39,415 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 13:31:39,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:39,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 13:31:39,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1106, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 13:31:39,416 INFO L87 Difference]: Start difference. First operand 358 states and 419 transitions. Second operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:31:39,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:31:39,859 INFO L93 Difference]: Finished difference Result 364 states and 424 transitions. [2022-03-20 13:31:39,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 13:31:39,860 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-03-20 13:31:39,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:31:39,861 INFO L225 Difference]: With dead ends: 364 [2022-03-20 13:31:39,861 INFO L226 Difference]: Without dead ends: 345 [2022-03-20 13:31:39,863 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=1452, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 13:31:39,863 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 47 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:31:39,864 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1134 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:31:39,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-20 13:31:40,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2022-03-20 13:31:40,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 285 states have (on average 1.1894736842105262) internal successors, (339), 319 states have internal predecessors, (339), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (43), 20 states have call predecessors, (43), 20 states have call successors, (43) [2022-03-20 13:31:40,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 404 transitions. [2022-03-20 13:31:40,004 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 404 transitions. Word has length 47 [2022-03-20 13:31:40,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:31:40,004 INFO L478 AbstractCegarLoop]: Abstraction has 345 states and 404 transitions. [2022-03-20 13:31:40,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:31:40,004 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 404 transitions. [2022-03-20 13:31:40,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 13:31:40,008 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:31:40,008 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:31:40,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-20 13:31:40,231 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,SelfDestructingSolverStorable44 [2022-03-20 13:31:40,232 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:31:40,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:31:40,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1644141558, now seen corresponding path program 38 times [2022-03-20 13:31:40,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:40,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [905671979] [2022-03-20 13:31:40,266 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:31:40,266 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:31:40,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1097207819, now seen corresponding path program 1 times [2022-03-20 13:31:40,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:31:40,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733856186] [2022-03-20 13:31:40,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:40,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:31:40,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:31:40,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577832820] [2022-03-20 13:31:40,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:40,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:40,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:31:40,274 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 13:31:40,282 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 13:31:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:40,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 13:31:40,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:31:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:31:40,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:31:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:31:41,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:31:41,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733856186] [2022-03-20 13:31:41,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:31:41,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577832820] [2022-03-20 13:31:41,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577832820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:31:41,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:31:41,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 32 [2022-03-20 13:31:41,031 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:31:41,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [905671979] [2022-03-20 13:31:41,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [905671979] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:31:41,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:31:41,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 13:31:41,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046281262] [2022-03-20 13:31:41,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:31:41,031 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 13:31:41,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:41,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 13:31:41,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=984, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 13:31:41,032 INFO L87 Difference]: Start difference. First operand 345 states and 404 transitions. Second operand has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:31:41,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:31:41,689 INFO L93 Difference]: Finished difference Result 422 states and 495 transitions. [2022-03-20 13:31:41,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 13:31:41,689 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-03-20 13:31:41,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:31:41,691 INFO L225 Difference]: With dead ends: 422 [2022-03-20 13:31:41,692 INFO L226 Difference]: Without dead ends: 416 [2022-03-20 13:31:41,694 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=1310, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 13:31:41,694 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 84 mSDsluCounter, 2282 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 2375 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:31:41,695 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 2375 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:31:41,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-03-20 13:31:41,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 361. [2022-03-20 13:31:41,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 298 states have (on average 1.191275167785235) internal successors, (355), 334 states have internal predecessors, (355), 23 states have call successors, (23), 5 states have call predecessors, (23), 39 states have return successors, (46), 21 states have call predecessors, (46), 21 states have call successors, (46) [2022-03-20 13:31:41,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 424 transitions. [2022-03-20 13:31:41,857 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 424 transitions. Word has length 47 [2022-03-20 13:31:41,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:31:41,858 INFO L478 AbstractCegarLoop]: Abstraction has 361 states and 424 transitions. [2022-03-20 13:31:41,858 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:31:41,858 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 424 transitions. [2022-03-20 13:31:41,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 13:31:41,862 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:31:41,862 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:31:41,880 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 13:31:42,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-20 13:31:42,071 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:31:42,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:31:42,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1136723602, now seen corresponding path program 39 times [2022-03-20 13:31:42,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:42,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [424532379] [2022-03-20 13:31:42,109 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:31:42,109 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:31:42,109 INFO L85 PathProgramCache]: Analyzing trace with hash -633998003, now seen corresponding path program 1 times [2022-03-20 13:31:42,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:31:42,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765143241] [2022-03-20 13:31:42,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:42,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:31:42,114 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:31:42,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629389489] [2022-03-20 13:31:42,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:42,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:42,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:31:42,115 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 13:31:42,141 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 13:31:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:42,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 13:31:42,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:31:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-20 13:31:43,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:31:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-20 13:31:46,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:31:46,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765143241] [2022-03-20 13:31:46,012 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:31:46,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629389489] [2022-03-20 13:31:46,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629389489] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:31:46,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:31:46,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 34 [2022-03-20 13:31:46,630 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:31:46,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [424532379] [2022-03-20 13:31:46,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [424532379] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:31:46,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:31:46,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 13:31:46,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232046091] [2022-03-20 13:31:46,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:31:46,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 13:31:46,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:46,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 13:31:46,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1383, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 13:31:46,631 INFO L87 Difference]: Start difference. First operand 361 states and 424 transitions. Second operand has 23 states, 20 states have (on average 1.8) internal successors, (36), 22 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:31:47,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:31:47,378 INFO L93 Difference]: Finished difference Result 367 states and 429 transitions. [2022-03-20 13:31:47,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 13:31:47,379 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.8) internal successors, (36), 22 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 48 [2022-03-20 13:31:47,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:31:47,380 INFO L225 Difference]: With dead ends: 367 [2022-03-20 13:31:47,380 INFO L226 Difference]: Without dead ends: 356 [2022-03-20 13:31:47,382 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=202, Invalid=1520, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 13:31:47,383 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 43 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:31:47,383 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 747 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 146 Unchecked, 0.1s Time] [2022-03-20 13:31:47,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-03-20 13:31:47,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 352. [2022-03-20 13:31:47,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 292 states have (on average 1.1883561643835616) internal successors, (347), 326 states have internal predecessors, (347), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2022-03-20 13:31:47,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 407 transitions. [2022-03-20 13:31:47,531 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 407 transitions. Word has length 48 [2022-03-20 13:31:47,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:31:47,531 INFO L478 AbstractCegarLoop]: Abstraction has 352 states and 407 transitions. [2022-03-20 13:31:47,531 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.8) internal successors, (36), 22 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:31:47,531 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 407 transitions. [2022-03-20 13:31:47,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 13:31:47,535 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:31:47,535 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:31:47,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-20 13:31:47,751 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,SelfDestructingSolverStorable46 [2022-03-20 13:31:47,751 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:31:47,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:31:47,751 INFO L85 PathProgramCache]: Analyzing trace with hash -76047475, now seen corresponding path program 40 times [2022-03-20 13:31:47,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:47,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1585373286] [2022-03-20 13:31:47,785 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:31:47,786 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:31:47,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1846918956, now seen corresponding path program 1 times [2022-03-20 13:31:47,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:31:47,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645516410] [2022-03-20 13:31:47,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:47,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:31:47,790 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:31:47,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605388841] [2022-03-20 13:31:47,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:47,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:47,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:31:47,792 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 13:31:47,794 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 13:31:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:47,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 13:31:47,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:31:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-20 13:31:47,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:31:48,154 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-20 13:31:48,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:31:48,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645516410] [2022-03-20 13:31:48,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:31:48,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605388841] [2022-03-20 13:31:48,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605388841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:31:48,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:31:48,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-03-20 13:31:48,170 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:31:48,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1585373286] [2022-03-20 13:31:48,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1585373286] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:31:48,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:31:48,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 13:31:48,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760913034] [2022-03-20 13:31:48,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:31:48,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 13:31:48,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:48,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 13:31:48,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2022-03-20 13:31:48,171 INFO L87 Difference]: Start difference. First operand 352 states and 407 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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 13:31:48,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:31:48,364 INFO L93 Difference]: Finished difference Result 382 states and 442 transitions. [2022-03-20 13:31:48,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 13:31:48,365 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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 48 [2022-03-20 13:31:48,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:31:48,366 INFO L225 Difference]: With dead ends: 382 [2022-03-20 13:31:48,366 INFO L226 Difference]: Without dead ends: 358 [2022-03-20 13:31:48,369 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2022-03-20 13:31:48,369 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 63 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:31:48,370 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 192 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:31:48,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-03-20 13:31:48,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2022-03-20 13:31:48,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 298 states have (on average 1.1845637583892616) internal successors, (353), 332 states have internal predecessors, (353), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2022-03-20 13:31:48,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 413 transitions. [2022-03-20 13:31:48,532 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 413 transitions. Word has length 48 [2022-03-20 13:31:48,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:31:48,532 INFO L478 AbstractCegarLoop]: Abstraction has 358 states and 413 transitions. [2022-03-20 13:31:48,532 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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 13:31:48,532 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 413 transitions. [2022-03-20 13:31:48,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 13:31:48,535 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:31:48,535 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:31:48,551 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 13:31:48,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:48,736 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:31:48,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:31:48,736 INFO L85 PathProgramCache]: Analyzing trace with hash -465556867, now seen corresponding path program 41 times [2022-03-20 13:31:48,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:48,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [960134570] [2022-03-20 13:31:48,767 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:31:48,767 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:31:48,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1417316900, now seen corresponding path program 1 times [2022-03-20 13:31:48,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:31:48,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466564501] [2022-03-20 13:31:48,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:48,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:31:48,772 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:31:48,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024607036] [2022-03-20 13:31:48,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:48,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:48,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:31:48,774 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 13:31:48,779 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 13:31:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:48,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 13:31:48,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:31:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:31:49,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:31:49,582 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:31:49,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:31:49,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466564501] [2022-03-20 13:31:49,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:31:49,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024607036] [2022-03-20 13:31:49,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024607036] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:31:49,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:31:49,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 36 [2022-03-20 13:31:49,623 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:31:49,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [960134570] [2022-03-20 13:31:49,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [960134570] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:31:49,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:31:49,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 13:31:49,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299039739] [2022-03-20 13:31:49,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:31:49,624 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 13:31:49,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:49,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 13:31:49,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1240, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 13:31:49,625 INFO L87 Difference]: Start difference. First operand 358 states and 413 transitions. Second operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:31:50,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:31:50,073 INFO L93 Difference]: Finished difference Result 364 states and 418 transitions. [2022-03-20 13:31:50,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 13:31:50,073 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-03-20 13:31:50,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:31:50,074 INFO L225 Difference]: With dead ends: 364 [2022-03-20 13:31:50,075 INFO L226 Difference]: Without dead ends: 344 [2022-03-20 13:31:50,077 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 55 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=1606, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 13:31:50,077 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 35 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:31:50,077 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 821 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:31:50,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-03-20 13:31:50,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2022-03-20 13:31:50,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 287 states have (on average 1.1846689895470384) internal successors, (340), 319 states have internal predecessors, (340), 21 states have call successors, (21), 5 states have call predecessors, (21), 35 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) [2022-03-20 13:31:50,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 397 transitions. [2022-03-20 13:31:50,224 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 397 transitions. Word has length 48 [2022-03-20 13:31:50,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:31:50,224 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 397 transitions. [2022-03-20 13:31:50,224 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:31:50,224 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 397 transitions. [2022-03-20 13:31:50,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 13:31:50,227 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:31:50,227 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1] [2022-03-20 13:31:50,243 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 13:31:50,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-20 13:31:50,427 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:31:50,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:31:50,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1127825248, now seen corresponding path program 42 times [2022-03-20 13:31:50,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:50,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [984959000] [2022-03-20 13:31:50,472 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:31:50,472 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:31:50,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1596306047, now seen corresponding path program 1 times [2022-03-20 13:31:50,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:31:50,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518276342] [2022-03-20 13:31:50,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:50,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:31:50,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:31:50,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570032546] [2022-03-20 13:31:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:50,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:50,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:31:50,479 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 13:31:50,480 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 13:31:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:50,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 13:31:50,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:31:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:31:50,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:31:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:31:51,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:31:51,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518276342] [2022-03-20 13:31:51,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:31:51,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570032546] [2022-03-20 13:31:51,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570032546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:31:51,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:31:51,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 34 [2022-03-20 13:31:51,298 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:31:51,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [984959000] [2022-03-20 13:31:51,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [984959000] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:31:51,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:31:51,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 13:31:51,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846647354] [2022-03-20 13:31:51,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:31:51,298 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 13:31:51,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:51,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 13:31:51,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1110, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 13:31:51,299 INFO L87 Difference]: Start difference. First operand 344 states and 397 transitions. Second operand has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:31:51,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:31:51,878 INFO L93 Difference]: Finished difference Result 350 states and 402 transitions. [2022-03-20 13:31:51,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 13:31:51,878 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-03-20 13:31:51,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:31:51,880 INFO L225 Difference]: With dead ends: 350 [2022-03-20 13:31:51,880 INFO L226 Difference]: Without dead ends: 332 [2022-03-20 13:31:51,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 55 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 13:31:51,883 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 71 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1968 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:31:51,883 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1968 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:31:51,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-03-20 13:31:52,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2022-03-20 13:31:52,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 278 states have (on average 1.183453237410072) internal successors, (329), 308 states have internal predecessors, (329), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (34), 18 states have call predecessors, (34), 18 states have call successors, (34) [2022-03-20 13:31:52,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 383 transitions. [2022-03-20 13:31:52,028 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 383 transitions. Word has length 48 [2022-03-20 13:31:52,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:31:52,028 INFO L478 AbstractCegarLoop]: Abstraction has 332 states and 383 transitions. [2022-03-20 13:31:52,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:31:52,028 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 383 transitions. [2022-03-20 13:31:52,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 13:31:52,031 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:31:52,031 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:31:52,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-20 13:31:52,231 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,SelfDestructingSolverStorable49 [2022-03-20 13:31:52,232 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:31:52,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:31:52,232 INFO L85 PathProgramCache]: Analyzing trace with hash -448253169, now seen corresponding path program 43 times [2022-03-20 13:31:52,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:52,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1491710157] [2022-03-20 13:31:52,281 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:31:52,282 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:31:52,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1440468462, now seen corresponding path program 1 times [2022-03-20 13:31:52,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:31:52,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984328737] [2022-03-20 13:31:52,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:52,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:31:52,287 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:31:52,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107095770] [2022-03-20 13:31:52,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:52,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:52,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:31:52,290 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 13:31:52,292 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 13:31:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:52,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 13:31:52,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:31:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:31:53,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:31:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:31:54,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:31:54,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984328737] [2022-03-20 13:31:54,573 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:31:54,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107095770] [2022-03-20 13:31:54,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107095770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:31:54,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:31:54,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2022-03-20 13:31:55,054 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:31:55,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1491710157] [2022-03-20 13:31:55,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1491710157] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:31:55,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:31:55,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 13:31:55,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553786000] [2022-03-20 13:31:55,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:31:55,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 13:31:55,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:55,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 13:31:55,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 13:31:55,055 INFO L87 Difference]: Start difference. First operand 332 states and 383 transitions. Second operand has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:31:56,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:31:56,417 INFO L93 Difference]: Finished difference Result 402 states and 469 transitions. [2022-03-20 13:31:56,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 13:31:56,420 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-03-20 13:31:56,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:31:56,424 INFO L225 Difference]: With dead ends: 402 [2022-03-20 13:31:56,424 INFO L226 Difference]: Without dead ends: 391 [2022-03-20 13:31:56,428 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=331, Invalid=2119, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 13:31:56,428 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 163 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:31:56,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 1120 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 525 Invalid, 0 Unknown, 39 Unchecked, 0.4s Time] [2022-03-20 13:31:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-03-20 13:31:56,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 382. [2022-03-20 13:31:56,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 319 states have (on average 1.1818181818181819) internal successors, (377), 355 states have internal predecessors, (377), 23 states have call successors, (23), 5 states have call predecessors, (23), 39 states have return successors, (43), 21 states have call predecessors, (43), 21 states have call successors, (43) [2022-03-20 13:31:56,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 443 transitions. [2022-03-20 13:31:56,637 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 443 transitions. Word has length 48 [2022-03-20 13:31:56,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:31:56,637 INFO L478 AbstractCegarLoop]: Abstraction has 382 states and 443 transitions. [2022-03-20 13:31:56,637 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:31:56,637 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 443 transitions. [2022-03-20 13:31:56,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 13:31:56,640 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:31:56,640 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:31:56,656 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 13:31:56,840 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:56,841 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:31:56,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:31:56,841 INFO L85 PathProgramCache]: Analyzing trace with hash 827987660, now seen corresponding path program 44 times [2022-03-20 13:31:56,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:56,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [243778324] [2022-03-20 13:31:56,890 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:31:56,891 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:31:56,891 INFO L85 PathProgramCache]: Analyzing trace with hash -158017173, now seen corresponding path program 1 times [2022-03-20 13:31:56,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:31:56,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258175264] [2022-03-20 13:31:56,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:56,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:31:56,896 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:31:56,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521306179] [2022-03-20 13:31:56,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:56,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:56,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:31:56,898 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 13:31:56,904 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 13:31:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:56,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 13:31:56,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:31:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:31:57,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:31:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:31:59,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:31:59,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258175264] [2022-03-20 13:31:59,390 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:31:59,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521306179] [2022-03-20 13:31:59,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521306179] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:31:59,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:31:59,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2022-03-20 13:31:59,914 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:31:59,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [243778324] [2022-03-20 13:31:59,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [243778324] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:31:59,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:31:59,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 13:31:59,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818241666] [2022-03-20 13:31:59,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:31:59,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 13:31:59,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:59,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 13:31:59,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 13:31:59,916 INFO L87 Difference]: Start difference. First operand 382 states and 443 transitions. Second operand has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:32:00,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:32:00,838 INFO L93 Difference]: Finished difference Result 397 states and 458 transitions. [2022-03-20 13:32:00,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 13:32:00,840 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-03-20 13:32:00,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:32:00,842 INFO L225 Difference]: With dead ends: 397 [2022-03-20 13:32:00,842 INFO L226 Difference]: Without dead ends: 385 [2022-03-20 13:32:00,845 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 13:32:00,845 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 76 mSDsluCounter, 1650 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1740 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:32:00,846 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1740 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 802 Invalid, 0 Unknown, 47 Unchecked, 0.7s Time] [2022-03-20 13:32:00,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-03-20 13:32:01,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 383. [2022-03-20 13:32:01,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 320 states have (on average 1.18125) internal successors, (378), 356 states have internal predecessors, (378), 23 states have call successors, (23), 5 states have call predecessors, (23), 39 states have return successors, (39), 21 states have call predecessors, (39), 21 states have call successors, (39) [2022-03-20 13:32:01,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 440 transitions. [2022-03-20 13:32:01,011 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 440 transitions. Word has length 48 [2022-03-20 13:32:01,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:32:01,011 INFO L478 AbstractCegarLoop]: Abstraction has 383 states and 440 transitions. [2022-03-20 13:32:01,011 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:32:01,011 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 440 transitions. [2022-03-20 13:32:01,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 13:32:01,015 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:32:01,015 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:32:01,031 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 13:32:01,215 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,SelfDestructingSolverStorable51 [2022-03-20 13:32:01,215 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:32:01,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:32:01,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1008334867, now seen corresponding path program 45 times [2022-03-20 13:32:01,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:32:01,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1203399970] [2022-03-20 13:32:01,250 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:32:01,251 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:32:01,251 INFO L85 PathProgramCache]: Analyzing trace with hash -431920786, now seen corresponding path program 1 times [2022-03-20 13:32:01,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:32:01,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032105879] [2022-03-20 13:32:01,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:32:01,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:32:01,255 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:32:01,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025241828] [2022-03-20 13:32:01,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:32:01,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:32:01,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:32:01,256 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 13:32:01,257 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 13:32:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:32:01,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 13:32:01,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:32:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 13:32:01,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:32:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 13:32:02,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:32:02,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032105879] [2022-03-20 13:32:02,049 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:32:02,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025241828] [2022-03-20 13:32:02,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025241828] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:32:02,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:32:02,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 38 [2022-03-20 13:32:02,079 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:32:02,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1203399970] [2022-03-20 13:32:02,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1203399970] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:32:02,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:32:02,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 13:32:02,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545159825] [2022-03-20 13:32:02,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:32:02,079 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 13:32:02,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:32:02,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 13:32:02,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1382, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 13:32:02,080 INFO L87 Difference]: Start difference. First operand 383 states and 440 transitions. Second operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:32:02,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:32:02,541 INFO L93 Difference]: Finished difference Result 401 states and 461 transitions. [2022-03-20 13:32:02,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 13:32:02,542 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-03-20 13:32:02,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:32:02,545 INFO L225 Difference]: With dead ends: 401 [2022-03-20 13:32:02,545 INFO L226 Difference]: Without dead ends: 395 [2022-03-20 13:32:02,548 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=1768, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 13:32:02,548 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:32:02,548 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 625 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:32:02,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-03-20 13:32:02,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 393. [2022-03-20 13:32:02,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 327 states have (on average 1.18348623853211) internal successors, (387), 365 states have internal predecessors, (387), 24 states have call successors, (24), 5 states have call predecessors, (24), 41 states have return successors, (42), 22 states have call predecessors, (42), 22 states have call successors, (42) [2022-03-20 13:32:02,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 453 transitions. [2022-03-20 13:32:02,723 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 453 transitions. Word has length 49 [2022-03-20 13:32:02,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:32:02,723 INFO L478 AbstractCegarLoop]: Abstraction has 393 states and 453 transitions. [2022-03-20 13:32:02,723 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:32:02,723 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 453 transitions. [2022-03-20 13:32:02,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 13:32:02,726 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:32:02,726 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:32:02,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-20 13:32:02,926 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:32:02,927 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:32:02,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:32:02,927 INFO L85 PathProgramCache]: Analyzing trace with hash 343323402, now seen corresponding path program 46 times [2022-03-20 13:32:02,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:32:02,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [79760889] [2022-03-20 13:32:02,961 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:32:02,961 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:32:02,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1997530315, now seen corresponding path program 1 times [2022-03-20 13:32:02,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:32:02,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007131664] [2022-03-20 13:32:02,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:32:02,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:32:02,966 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:32:02,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487648975] [2022-03-20 13:32:02,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:32:02,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:32:02,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:32:02,968 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 13:32:02,992 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 13:32:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:32:03,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 13:32:03,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:32:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 13:32:03,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:32:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 13:32:03,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:32:03,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007131664] [2022-03-20 13:32:03,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:32:03,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487648975] [2022-03-20 13:32:03,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487648975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:32:03,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:32:03,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2022-03-20 13:32:03,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:32:03,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [79760889] [2022-03-20 13:32:03,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [79760889] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:32:03,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:32:03,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 13:32:03,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617515947] [2022-03-20 13:32:03,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:32:03,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 13:32:03,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:32:03,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 13:32:03,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 13:32:03,817 INFO L87 Difference]: Start difference. First operand 393 states and 453 transitions. Second operand has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:32:04,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:32:04,412 INFO L93 Difference]: Finished difference Result 399 states and 458 transitions. [2022-03-20 13:32:04,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 13:32:04,412 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-03-20 13:32:04,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:32:04,414 INFO L225 Difference]: With dead ends: 399 [2022-03-20 13:32:04,414 INFO L226 Difference]: Without dead ends: 380 [2022-03-20 13:32:04,417 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=1610, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 13:32:04,417 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 59 mSDsluCounter, 1485 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:32:04,418 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1557 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:32:04,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-03-20 13:32:04,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2022-03-20 13:32:04,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 317 states have (on average 1.1829652996845426) internal successors, (375), 353 states have internal predecessors, (375), 23 states have call successors, (23), 5 states have call predecessors, (23), 39 states have return successors, (40), 21 states have call predecessors, (40), 21 states have call successors, (40) [2022-03-20 13:32:04,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 438 transitions. [2022-03-20 13:32:04,613 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 438 transitions. Word has length 49 [2022-03-20 13:32:04,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:32:04,614 INFO L478 AbstractCegarLoop]: Abstraction has 380 states and 438 transitions. [2022-03-20 13:32:04,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:32:04,614 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 438 transitions. [2022-03-20 13:32:04,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 13:32:04,616 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:32:04,616 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:32:04,632 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 13:32:04,816 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,SelfDestructingSolverStorable53 [2022-03-20 13:32:04,816 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:32:04,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:32:04,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1121658739, now seen corresponding path program 47 times [2022-03-20 13:32:04,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:32:04,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1510419329] [2022-03-20 13:32:04,852 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:32:04,852 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:32:04,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1610341006, now seen corresponding path program 1 times [2022-03-20 13:32:04,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:32:04,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724154289] [2022-03-20 13:32:04,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:32:04,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:32:04,857 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:32:04,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068191642] [2022-03-20 13:32:04,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:32:04,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:32:04,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:32:04,859 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 13:32:04,860 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 13:32:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:32:04,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 13:32:04,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:32:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:32:05,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:32:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:32:05,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:32:05,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724154289] [2022-03-20 13:32:05,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:32:05,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068191642] [2022-03-20 13:32:05,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068191642] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:32:05,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:32:05,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 34 [2022-03-20 13:32:05,687 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:32:05,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1510419329] [2022-03-20 13:32:05,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1510419329] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:32:05,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:32:05,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 13:32:05,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43288904] [2022-03-20 13:32:05,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:32:05,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 13:32:05,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:32:05,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 13:32:05,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1114, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 13:32:05,689 INFO L87 Difference]: Start difference. First operand 380 states and 438 transitions. Second operand has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:32:06,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:32:06,495 INFO L93 Difference]: Finished difference Result 458 states and 529 transitions. [2022-03-20 13:32:06,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 13:32:06,496 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-03-20 13:32:06,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:32:06,499 INFO L225 Difference]: With dead ends: 458 [2022-03-20 13:32:06,499 INFO L226 Difference]: Without dead ends: 452 [2022-03-20 13:32:06,501 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=1460, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 13:32:06,501 INFO L913 BasicCegarLoop]: 105 mSDtfsCounter, 96 mSDsluCounter, 2784 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 2889 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:32:06,501 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 2889 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:32:06,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-03-20 13:32:06,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 396. [2022-03-20 13:32:06,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 330 states have (on average 1.1848484848484848) internal successors, (391), 368 states have internal predecessors, (391), 24 states have call successors, (24), 5 states have call predecessors, (24), 41 states have return successors, (43), 22 states have call predecessors, (43), 22 states have call successors, (43) [2022-03-20 13:32:06,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 458 transitions. [2022-03-20 13:32:06,679 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 458 transitions. Word has length 49 [2022-03-20 13:32:06,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:32:06,679 INFO L478 AbstractCegarLoop]: Abstraction has 396 states and 458 transitions. [2022-03-20 13:32:06,679 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:32:06,679 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 458 transitions. [2022-03-20 13:32:06,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 13:32:06,681 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:32:06,681 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:32:06,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-20 13:32:06,882 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-20 13:32:06,897 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:32:06,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:32:06,897 INFO L85 PathProgramCache]: Analyzing trace with hash 155527053, now seen corresponding path program 48 times [2022-03-20 13:32:06,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:32:06,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [974429577] [2022-03-20 13:32:06,943 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:32:06,943 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:32:06,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1999987348, now seen corresponding path program 1 times [2022-03-20 13:32:06,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:32:06,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658637432] [2022-03-20 13:32:06,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:32:06,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:32:06,953 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:32:06,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829281283] [2022-03-20 13:32:06,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:32:06,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:32:06,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:32:06,956 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 13:32:06,987 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 13:32:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:32:07,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 13:32:07,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:32:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-20 13:32:07,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:32:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-20 13:32:07,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:32:07,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658637432] [2022-03-20 13:32:07,398 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:32:07,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829281283] [2022-03-20 13:32:07,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829281283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:32:07,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:32:07,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2022-03-20 13:32:07,421 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:32:07,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [974429577] [2022-03-20 13:32:07,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [974429577] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:32:07,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:32:07,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 13:32:07,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709359242] [2022-03-20 13:32:07,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:32:07,422 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 13:32:07,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:32:07,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 13:32:07,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-03-20 13:32:07,423 INFO L87 Difference]: Start difference. First operand 396 states and 458 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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 13:32:07,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:32:07,890 INFO L93 Difference]: Finished difference Result 509 states and 593 transitions. [2022-03-20 13:32:07,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 13:32:07,892 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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 50 [2022-03-20 13:32:07,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:32:07,894 INFO L225 Difference]: With dead ends: 509 [2022-03-20 13:32:07,894 INFO L226 Difference]: Without dead ends: 475 [2022-03-20 13:32:07,907 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 13:32:07,908 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 82 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:32:07,908 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 322 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:32:07,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-03-20 13:32:08,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 454. [2022-03-20 13:32:08,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 388 states have (on average 1.1778350515463918) internal successors, (457), 426 states have internal predecessors, (457), 24 states have call successors, (24), 5 states have call predecessors, (24), 41 states have return successors, (43), 22 states have call predecessors, (43), 22 states have call successors, (43) [2022-03-20 13:32:08,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 524 transitions. [2022-03-20 13:32:08,096 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 524 transitions. Word has length 50 [2022-03-20 13:32:08,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:32:08,096 INFO L478 AbstractCegarLoop]: Abstraction has 454 states and 524 transitions. [2022-03-20 13:32:08,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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 13:32:08,096 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 524 transitions. [2022-03-20 13:32:08,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 13:32:08,099 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:32:08,099 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:32:08,121 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 13:32:08,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:32:08,315 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:32:08,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:32:08,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1323251378, now seen corresponding path program 49 times [2022-03-20 13:32:08,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:32:08,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [354419810] [2022-03-20 13:32:08,371 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:32:08,371 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:32:08,372 INFO L85 PathProgramCache]: Analyzing trace with hash -131959059, now seen corresponding path program 1 times [2022-03-20 13:32:08,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:32:08,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300643266] [2022-03-20 13:32:08,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:32:08,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:32:08,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:32:08,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [584773167] [2022-03-20 13:32:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:32:08,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:32:08,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:32:08,380 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 13:32:08,402 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 13:32:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:32:08,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 13:32:08,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:32:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:32:22,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:32:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-20 13:32:27,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:32:27,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300643266] [2022-03-20 13:32:27,963 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:32:27,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584773167] [2022-03-20 13:32:27,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584773167] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:32:27,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:32:27,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19] total 45 [2022-03-20 13:32:30,191 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:32:30,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [354419810] [2022-03-20 13:32:30,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [354419810] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:32:30,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:32:30,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 13:32:30,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396196338] [2022-03-20 13:32:30,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:32:30,192 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 13:32:30,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:32:30,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 13:32:30,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=2334, Unknown=4, NotChecked=0, Total=2652 [2022-03-20 13:32:30,193 INFO L87 Difference]: Start difference. First operand 454 states and 524 transitions. Second operand has 34 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 32 states have internal predecessors, (42), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:32:32,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:32:32,868 INFO L93 Difference]: Finished difference Result 501 states and 582 transitions. [2022-03-20 13:32:32,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 13:32:32,868 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 32 states have internal predecessors, (42), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 50 [2022-03-20 13:32:32,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:32:32,874 INFO L225 Difference]: With dead ends: 501 [2022-03-20 13:32:32,875 INFO L226 Difference]: Without dead ends: 485 [2022-03-20 13:32:32,878 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=368, Invalid=2708, Unknown=4, NotChecked=0, Total=3080 [2022-03-20 13:32:32,878 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 16 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:32:32,878 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 668 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 462 Invalid, 0 Unknown, 141 Unchecked, 0.2s Time] [2022-03-20 13:32:32,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-03-20 13:32:33,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 447. [2022-03-20 13:32:33,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 381 states have (on average 1.178477690288714) internal successors, (449), 419 states have internal predecessors, (449), 24 states have call successors, (24), 5 states have call predecessors, (24), 41 states have return successors, (43), 22 states have call predecessors, (43), 22 states have call successors, (43) [2022-03-20 13:32:33,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 516 transitions. [2022-03-20 13:32:33,088 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 516 transitions. Word has length 50 [2022-03-20 13:32:33,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:32:33,088 INFO L478 AbstractCegarLoop]: Abstraction has 447 states and 516 transitions. [2022-03-20 13:32:33,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 32 states have internal predecessors, (42), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:32:33,089 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 516 transitions. [2022-03-20 13:32:33,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 13:32:33,091 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:32:33,091 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:32:33,108 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 13:32:33,292 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:32:33,293 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:32:33,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:32:33,293 INFO L85 PathProgramCache]: Analyzing trace with hash -820344608, now seen corresponding path program 50 times [2022-03-20 13:32:33,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:32:33,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1748175999] [2022-03-20 13:32:33,327 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:32:33,328 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:32:33,328 INFO L85 PathProgramCache]: Analyzing trace with hash -577212865, now seen corresponding path program 1 times [2022-03-20 13:32:33,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:32:33,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366095782] [2022-03-20 13:32:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:32:33,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:32:33,333 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:32:33,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812653588] [2022-03-20 13:32:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:32:33,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:32:33,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:32:33,334 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 13:32:33,340 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 13:32:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:32:33,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 13:32:33,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:32:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:32:33,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:32:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:32:34,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:32:34,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366095782] [2022-03-20 13:32:34,324 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:32:34,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812653588] [2022-03-20 13:32:34,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812653588] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:32:34,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:32:34,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 38 [2022-03-20 13:32:34,356 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:32:34,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1748175999] [2022-03-20 13:32:34,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1748175999] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:32:34,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:32:34,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 13:32:34,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972841504] [2022-03-20 13:32:34,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:32:34,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 13:32:34,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:32:34,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 13:32:34,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1386, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 13:32:34,357 INFO L87 Difference]: Start difference. First operand 447 states and 516 transitions. Second operand has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:32:34,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:32:34,884 INFO L93 Difference]: Finished difference Result 453 states and 521 transitions. [2022-03-20 13:32:34,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 13:32:34,884 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-03-20 13:32:34,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:32:34,886 INFO L225 Difference]: With dead ends: 453 [2022-03-20 13:32:34,886 INFO L226 Difference]: Without dead ends: 433 [2022-03-20 13:32:34,889 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=1772, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 13:32:34,889 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 47 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:32:34,889 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 980 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:32:34,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-03-20 13:32:35,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2022-03-20 13:32:35,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 370 states have (on average 1.1783783783783783) internal successors, (436), 406 states have internal predecessors, (436), 23 states have call successors, (23), 5 states have call predecessors, (23), 39 states have return successors, (41), 21 states have call predecessors, (41), 21 states have call successors, (41) [2022-03-20 13:32:35,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 500 transitions. [2022-03-20 13:32:35,095 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 500 transitions. Word has length 50 [2022-03-20 13:32:35,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:32:35,095 INFO L478 AbstractCegarLoop]: Abstraction has 433 states and 500 transitions. [2022-03-20 13:32:35,095 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:32:35,095 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 500 transitions. [2022-03-20 13:32:35,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 13:32:35,097 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:32:35,097 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1] [2022-03-20 13:32:35,114 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 13:32:35,297 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:32:35,298 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:32:35,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:32:35,298 INFO L85 PathProgramCache]: Analyzing trace with hash 2138801309, now seen corresponding path program 51 times [2022-03-20 13:32:35,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:32:35,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1044927444] [2022-03-20 13:32:35,335 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:32:35,335 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:32:35,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1433772476, now seen corresponding path program 1 times [2022-03-20 13:32:35,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:32:35,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799564078] [2022-03-20 13:32:35,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:32:35,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:32:35,340 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:32:35,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919085694] [2022-03-20 13:32:35,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:32:35,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:32:35,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:32:35,341 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 13:32:35,344 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 13:32:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:32:35,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 13:32:35,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:32:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:32:35,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:32:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:32:36,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:32:36,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799564078] [2022-03-20 13:32:36,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:32:36,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919085694] [2022-03-20 13:32:36,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919085694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:32:36,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:32:36,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 36 [2022-03-20 13:32:36,293 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:32:36,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1044927444] [2022-03-20 13:32:36,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1044927444] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:32:36,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:32:36,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 13:32:36,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556485618] [2022-03-20 13:32:36,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:32:36,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 13:32:36,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:32:36,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 13:32:36,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1248, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 13:32:36,294 INFO L87 Difference]: Start difference. First operand 433 states and 500 transitions. Second operand has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:32:37,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:32:37,030 INFO L93 Difference]: Finished difference Result 439 states and 505 transitions. [2022-03-20 13:32:37,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 13:32:37,030 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-03-20 13:32:37,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:32:37,032 INFO L225 Difference]: With dead ends: 439 [2022-03-20 13:32:37,032 INFO L226 Difference]: Without dead ends: 421 [2022-03-20 13:32:37,034 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 57 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=1614, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 13:32:37,034 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 83 mSDsluCounter, 2446 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 2542 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:32:37,034 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 2542 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:32:37,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-03-20 13:32:37,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2022-03-20 13:32:37,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 361 states have (on average 1.1772853185595569) internal successors, (425), 395 states have internal predecessors, (425), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2022-03-20 13:32:37,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 486 transitions. [2022-03-20 13:32:37,222 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 486 transitions. Word has length 50 [2022-03-20 13:32:37,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:32:37,222 INFO L478 AbstractCegarLoop]: Abstraction has 421 states and 486 transitions. [2022-03-20 13:32:37,222 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:32:37,222 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 486 transitions. [2022-03-20 13:32:37,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 13:32:37,224 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:32:37,224 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:32:37,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-20 13:32:37,424 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,SelfDestructingSolverStorable58 [2022-03-20 13:32:37,425 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:32:37,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:32:37,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1431154964, now seen corresponding path program 52 times [2022-03-20 13:32:37,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:32:37,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [191054285] [2022-03-20 13:32:37,472 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:32:37,472 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:32:37,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1210622923, now seen corresponding path program 1 times [2022-03-20 13:32:37,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:32:37,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484239842] [2022-03-20 13:32:37,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:32:37,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:32:37,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:32:37,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875601406] [2022-03-20 13:32:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:32:37,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:32:37,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:32:37,478 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 13:32:37,478 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 13:32:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:32:37,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 13:32:37,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:32:38,769 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:32:38,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:32:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:32:40,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:32:40,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484239842] [2022-03-20 13:32:40,817 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:32:40,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875601406] [2022-03-20 13:32:40,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875601406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:32:40,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:32:40,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2022-03-20 13:32:41,602 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:32:41,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [191054285] [2022-03-20 13:32:41,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [191054285] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:32:41,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:32:41,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 13:32:41,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869549906] [2022-03-20 13:32:41,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:32:41,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 13:32:41,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:32:41,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 13:32:41,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 13:32:41,604 INFO L87 Difference]: Start difference. First operand 421 states and 486 transitions. Second operand has 26 states, 24 states have (on average 1.75) internal successors, (42), 25 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:32:43,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:32:43,642 INFO L93 Difference]: Finished difference Result 499 states and 581 transitions. [2022-03-20 13:32:43,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 13:32:43,646 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.75) internal successors, (42), 25 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-03-20 13:32:43,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:32:43,652 INFO L225 Difference]: With dead ends: 499 [2022-03-20 13:32:43,652 INFO L226 Difference]: Without dead ends: 488 [2022-03-20 13:32:43,656 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=407, Invalid=2673, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 13:32:43,656 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 211 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:32:43,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 1343 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 636 Invalid, 0 Unknown, 38 Unchecked, 0.6s Time] [2022-03-20 13:32:43,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-03-20 13:32:43,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 479. [2022-03-20 13:32:43,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 410 states have (on average 1.175609756097561) internal successors, (482), 450 states have internal predecessors, (482), 25 states have call successors, (25), 5 states have call predecessors, (25), 43 states have return successors, (48), 23 states have call predecessors, (48), 23 states have call successors, (48) [2022-03-20 13:32:43,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 555 transitions. [2022-03-20 13:32:43,896 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 555 transitions. Word has length 50 [2022-03-20 13:32:43,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:32:43,896 INFO L478 AbstractCegarLoop]: Abstraction has 479 states and 555 transitions. [2022-03-20 13:32:43,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.75) internal successors, (42), 25 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:32:43,896 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 555 transitions. [2022-03-20 13:32:43,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 13:32:43,899 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:32:43,899 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:32:43,916 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 13:32:44,100 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,SelfDestructingSolverStorable59 [2022-03-20 13:32:44,100 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:32:44,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:32:44,100 INFO L85 PathProgramCache]: Analyzing trace with hash -522394929, now seen corresponding path program 53 times [2022-03-20 13:32:44,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:32:44,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2103481042] [2022-03-20 13:32:44,144 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:32:44,145 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:32:44,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1171222382, now seen corresponding path program 1 times [2022-03-20 13:32:44,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:32:44,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175689456] [2022-03-20 13:32:44,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:32:44,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:32:44,149 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:32:44,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987947567] [2022-03-20 13:32:44,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:32:44,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:32:44,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:32:44,151 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 13:32:44,153 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 13:32:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:32:44,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 13:32:44,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:32:45,582 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:32:45,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:32:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:32:47,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:32:47,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175689456] [2022-03-20 13:32:47,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:32:47,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987947567] [2022-03-20 13:32:47,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987947567] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:32:47,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:32:47,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2022-03-20 13:32:48,548 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:32:48,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2103481042] [2022-03-20 13:32:48,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2103481042] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:32:48,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:32:48,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 13:32:48,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776425790] [2022-03-20 13:32:48,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:32:48,548 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 13:32:48,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:32:48,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 13:32:48,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 13:32:48,549 INFO L87 Difference]: Start difference. First operand 479 states and 555 transitions. Second operand has 26 states, 24 states have (on average 1.75) internal successors, (42), 25 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:32:49,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:32:49,793 INFO L93 Difference]: Finished difference Result 494 states and 570 transitions. [2022-03-20 13:32:49,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 13:32:49,796 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.75) internal successors, (42), 25 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-03-20 13:32:49,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:32:49,798 INFO L225 Difference]: With dead ends: 494 [2022-03-20 13:32:49,798 INFO L226 Difference]: Without dead ends: 482 [2022-03-20 13:32:49,801 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 13:32:49,802 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 88 mSDsluCounter, 2040 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 2140 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 13:32:49,802 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 2140 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1006 Invalid, 0 Unknown, 56 Unchecked, 0.9s Time] [2022-03-20 13:32:49,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-03-20 13:32:50,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 480. [2022-03-20 13:32:50,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 411 states have (on average 1.1751824817518248) internal successors, (483), 451 states have internal predecessors, (483), 25 states have call successors, (25), 5 states have call predecessors, (25), 43 states have return successors, (44), 23 states have call predecessors, (44), 23 states have call successors, (44) [2022-03-20 13:32:50,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 552 transitions. [2022-03-20 13:32:50,027 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 552 transitions. Word has length 50 [2022-03-20 13:32:50,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:32:50,027 INFO L478 AbstractCegarLoop]: Abstraction has 480 states and 552 transitions. [2022-03-20 13:32:50,027 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.75) internal successors, (42), 25 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:32:50,027 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 552 transitions. [2022-03-20 13:32:50,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 13:32:50,032 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:32:50,032 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:32:50,055 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 13:32:50,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:32:50,247 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:32:50,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:32:50,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2073135809, now seen corresponding path program 54 times [2022-03-20 13:32:50,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:32:50,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [966193930] [2022-03-20 13:32:50,285 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:32:50,285 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:32:50,285 INFO L85 PathProgramCache]: Analyzing trace with hash -438813504, now seen corresponding path program 1 times [2022-03-20 13:32:50,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:32:50,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269247310] [2022-03-20 13:32:50,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:32:50,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:32:50,292 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:32:50,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322176488] [2022-03-20 13:32:50,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:32:50,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:32:50,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:32:50,293 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 13:32:50,295 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 13:32:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:32:50,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 13:32:50,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:32:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-20 13:32:52,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:32:56,400 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-20 13:32:56,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:32:56,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269247310] [2022-03-20 13:32:56,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:32:56,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322176488] [2022-03-20 13:32:56,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322176488] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:32:56,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:32:56,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2022-03-20 13:32:57,316 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:32:57,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [966193930] [2022-03-20 13:32:57,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [966193930] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:32:57,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:32:57,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 13:32:57,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794061161] [2022-03-20 13:32:57,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:32:57,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 13:32:57,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:32:57,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 13:32:57,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1690, Unknown=1, NotChecked=0, Total=1892 [2022-03-20 13:32:57,318 INFO L87 Difference]: Start difference. First operand 480 states and 552 transitions. Second operand has 25 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 24 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:32:58,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:32:58,452 INFO L93 Difference]: Finished difference Result 549 states and 641 transitions. [2022-03-20 13:32:58,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 13:32:58,453 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 24 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51 [2022-03-20 13:32:58,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:32:58,461 INFO L225 Difference]: With dead ends: 549 [2022-03-20 13:32:58,461 INFO L226 Difference]: Without dead ends: 538 [2022-03-20 13:32:58,465 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=210, Invalid=1769, Unknown=1, NotChecked=0, Total=1980 [2022-03-20 13:32:58,465 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 46 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:32:58,466 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 848 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 216 Invalid, 0 Unknown, 174 Unchecked, 0.2s Time] [2022-03-20 13:32:58,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-03-20 13:32:58,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 534. [2022-03-20 13:32:58,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 447 states have (on average 1.1722595078299776) internal successors, (524), 499 states have internal predecessors, (524), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (62), 29 states have call predecessors, (62), 29 states have call successors, (62) [2022-03-20 13:32:58,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 617 transitions. [2022-03-20 13:32:58,769 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 617 transitions. Word has length 51 [2022-03-20 13:32:58,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:32:58,769 INFO L478 AbstractCegarLoop]: Abstraction has 534 states and 617 transitions. [2022-03-20 13:32:58,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 24 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:32:58,769 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 617 transitions. [2022-03-20 13:32:58,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 13:32:58,774 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:32:58,774 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:32:58,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-20 13:32:58,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:32:58,987 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:32:58,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:32:58,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1837062470, now seen corresponding path program 55 times [2022-03-20 13:32:58,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:32:58,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1863841248] [2022-03-20 13:32:59,032 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:32:59,032 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:32:59,032 INFO L85 PathProgramCache]: Analyzing trace with hash 469053051, now seen corresponding path program 1 times [2022-03-20 13:32:59,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:32:59,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22486264] [2022-03-20 13:32:59,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:32:59,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:32:59,038 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:32:59,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103337892] [2022-03-20 13:32:59,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:32:59,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:32:59,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:32:59,039 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 13:32:59,040 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 13:32:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:32:59,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 13:32:59,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:32:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-20 13:32:59,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:32:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-20 13:32:59,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:32:59,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22486264] [2022-03-20 13:32:59,539 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:32:59,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103337892] [2022-03-20 13:32:59,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103337892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:32:59,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:32:59,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-03-20 13:32:59,555 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:32:59,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1863841248] [2022-03-20 13:32:59,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1863841248] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:32:59,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:32:59,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 13:32:59,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679738329] [2022-03-20 13:32:59,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:32:59,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 13:32:59,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:32:59,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 13:32:59,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2022-03-20 13:32:59,556 INFO L87 Difference]: Start difference. First operand 534 states and 617 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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 13:32:59,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:32:59,928 INFO L93 Difference]: Finished difference Result 572 states and 662 transitions. [2022-03-20 13:32:59,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 13:32:59,932 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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 51 [2022-03-20 13:32:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:32:59,934 INFO L225 Difference]: With dead ends: 572 [2022-03-20 13:32:59,934 INFO L226 Difference]: Without dead ends: 542 [2022-03-20 13:32:59,938 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2022-03-20 13:32:59,938 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 80 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:32:59,938 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 278 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:32:59,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-03-20 13:33:00,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 542. [2022-03-20 13:33:00,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 455 states have (on average 1.1692307692307693) internal successors, (532), 507 states have internal predecessors, (532), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (62), 29 states have call predecessors, (62), 29 states have call successors, (62) [2022-03-20 13:33:00,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 625 transitions. [2022-03-20 13:33:00,239 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 625 transitions. Word has length 51 [2022-03-20 13:33:00,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:33:00,240 INFO L478 AbstractCegarLoop]: Abstraction has 542 states and 625 transitions. [2022-03-20 13:33:00,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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 13:33:00,240 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 625 transitions. [2022-03-20 13:33:00,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 13:33:00,244 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:33:00,244 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:33:00,261 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 13:33:00,444 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:33:00,445 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:33:00,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:33:00,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1950338550, now seen corresponding path program 56 times [2022-03-20 13:33:00,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:00,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [507257829] [2022-03-20 13:33:00,486 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:33:00,487 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:33:00,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1027570187, now seen corresponding path program 1 times [2022-03-20 13:33:00,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:33:00,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243756299] [2022-03-20 13:33:00,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:33:00,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:33:00,492 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:33:00,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460409405] [2022-03-20 13:33:00,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:33:00,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:33:00,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:33:00,493 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 13:33:00,494 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 13:33:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:33:00,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 13:33:00,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:33:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 13:33:00,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:33:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 13:33:01,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:33:01,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243756299] [2022-03-20 13:33:01,402 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:33:01,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460409405] [2022-03-20 13:33:01,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460409405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:33:01,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:33:01,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 40 [2022-03-20 13:33:01,436 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:33:01,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [507257829] [2022-03-20 13:33:01,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [507257829] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:33:01,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:33:01,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 13:33:01,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694438164] [2022-03-20 13:33:01,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:33:01,437 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 13:33:01,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:01,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 13:33:01,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 13:33:01,438 INFO L87 Difference]: Start difference. First operand 542 states and 625 transitions. Second operand has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:33:02,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:33:02,178 INFO L93 Difference]: Finished difference Result 548 states and 630 transitions. [2022-03-20 13:33:02,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 13:33:02,179 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-03-20 13:33:02,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:33:02,181 INFO L225 Difference]: With dead ends: 548 [2022-03-20 13:33:02,181 INFO L226 Difference]: Without dead ends: 537 [2022-03-20 13:33:02,186 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=1942, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 13:33:02,186 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 35 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:33:02,186 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 1088 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:33:02,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-03-20 13:33:02,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 534. [2022-03-20 13:33:02,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 450 states have (on average 1.1688888888888889) internal successors, (526), 500 states have internal predecessors, (526), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (59), 28 states have call predecessors, (59), 28 states have call successors, (59) [2022-03-20 13:33:02,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 615 transitions. [2022-03-20 13:33:02,462 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 615 transitions. Word has length 51 [2022-03-20 13:33:02,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:33:02,462 INFO L478 AbstractCegarLoop]: Abstraction has 534 states and 615 transitions. [2022-03-20 13:33:02,462 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:33:02,462 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 615 transitions. [2022-03-20 13:33:02,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 13:33:02,466 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:33:02,466 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:33:02,482 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 13:33:02,666 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:33:02,667 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:33:02,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:33:02,667 INFO L85 PathProgramCache]: Analyzing trace with hash 603717197, now seen corresponding path program 57 times [2022-03-20 13:33:02,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:02,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2065752967] [2022-03-20 13:33:02,706 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:33:02,706 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:33:02,706 INFO L85 PathProgramCache]: Analyzing trace with hash -41548146, now seen corresponding path program 1 times [2022-03-20 13:33:02,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:33:02,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638713693] [2022-03-20 13:33:02,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:33:02,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:33:02,712 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:33:02,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263899333] [2022-03-20 13:33:02,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:33:02,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:33:02,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:33:02,713 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 13:33:02,723 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 13:33:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:33:02,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 13:33:02,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:33:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 13:33:03,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:33:03,716 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 13:33:03,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:33:03,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638713693] [2022-03-20 13:33:03,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:33:03,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263899333] [2022-03-20 13:33:03,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263899333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:33:03,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:33:03,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 38 [2022-03-20 13:33:03,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:33:03,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2065752967] [2022-03-20 13:33:03,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2065752967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:33:03,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:33:03,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 13:33:03,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990109350] [2022-03-20 13:33:03,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:33:03,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 13:33:03,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:03,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 13:33:03,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1390, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 13:33:03,753 INFO L87 Difference]: Start difference. First operand 534 states and 615 transitions. Second operand has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:33:04,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:33:04,459 INFO L93 Difference]: Finished difference Result 540 states and 620 transitions. [2022-03-20 13:33:04,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 13:33:04,460 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-03-20 13:33:04,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:33:04,462 INFO L225 Difference]: With dead ends: 540 [2022-03-20 13:33:04,462 INFO L226 Difference]: Without dead ends: 521 [2022-03-20 13:33:04,470 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 11 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=1776, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 13:33:04,470 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 71 mSDsluCounter, 1751 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1835 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:33:04,470 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1835 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:33:04,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-03-20 13:33:04,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 521. [2022-03-20 13:33:04,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 440 states have (on average 1.1681818181818182) internal successors, (514), 488 states have internal predecessors, (514), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (57), 27 states have call predecessors, (57), 27 states have call successors, (57) [2022-03-20 13:33:04,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 600 transitions. [2022-03-20 13:33:04,745 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 600 transitions. Word has length 51 [2022-03-20 13:33:04,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:33:04,745 INFO L478 AbstractCegarLoop]: Abstraction has 521 states and 600 transitions. [2022-03-20 13:33:04,745 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:33:04,745 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 600 transitions. [2022-03-20 13:33:04,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 13:33:04,749 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:33:04,749 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:33:04,765 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 13:33:04,949 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,SelfDestructingSolverStorable64 [2022-03-20 13:33:04,949 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:33:04,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:33:04,950 INFO L85 PathProgramCache]: Analyzing trace with hash -33846038, now seen corresponding path program 58 times [2022-03-20 13:33:04,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:04,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [362132453] [2022-03-20 13:33:04,990 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:33:04,990 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:33:04,990 INFO L85 PathProgramCache]: Analyzing trace with hash -7318165, now seen corresponding path program 1 times [2022-03-20 13:33:04,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:33:04,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148113823] [2022-03-20 13:33:04,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:33:04,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:33:04,995 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:33:04,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644049039] [2022-03-20 13:33:04,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:33:04,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:33:04,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:33:04,996 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 13:33:05,017 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 13:33:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:33:05,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 13:33:05,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:33:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:33:05,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:33:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:33:05,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:33:05,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148113823] [2022-03-20 13:33:05,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:33:05,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644049039] [2022-03-20 13:33:05,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644049039] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:33:05,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:33:05,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 36 [2022-03-20 13:33:05,964 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:33:05,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [362132453] [2022-03-20 13:33:05,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [362132453] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:33:05,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:33:05,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 13:33:05,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034330258] [2022-03-20 13:33:05,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:33:05,965 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 13:33:05,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:05,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 13:33:05,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 13:33:05,966 INFO L87 Difference]: Start difference. First operand 521 states and 600 transitions. Second operand has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:33:06,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:33:06,954 INFO L93 Difference]: Finished difference Result 615 states and 710 transitions. [2022-03-20 13:33:06,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 13:33:06,954 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-03-20 13:33:06,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:33:06,958 INFO L225 Difference]: With dead ends: 615 [2022-03-20 13:33:06,958 INFO L226 Difference]: Without dead ends: 609 [2022-03-20 13:33:06,962 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 59 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=1618, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 13:33:06,962 INFO L913 BasicCegarLoop]: 117 mSDtfsCounter, 108 mSDsluCounter, 3109 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 3226 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:33:06,962 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 3226 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:33:06,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-03-20 13:33:07,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 537. [2022-03-20 13:33:07,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 453 states have (on average 1.1699779249448123) internal successors, (530), 503 states have internal predecessors, (530), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (60), 28 states have call predecessors, (60), 28 states have call successors, (60) [2022-03-20 13:33:07,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 620 transitions. [2022-03-20 13:33:07,281 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 620 transitions. Word has length 51 [2022-03-20 13:33:07,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:33:07,281 INFO L478 AbstractCegarLoop]: Abstraction has 537 states and 620 transitions. [2022-03-20 13:33:07,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:33:07,282 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 620 transitions. [2022-03-20 13:33:07,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 13:33:07,288 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:33:07,288 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:33:07,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-20 13:33:07,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:33:07,504 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:33:07,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:33:07,504 INFO L85 PathProgramCache]: Analyzing trace with hash 234775136, now seen corresponding path program 59 times [2022-03-20 13:33:07,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:07,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1513290622] [2022-03-20 13:33:07,552 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:33:07,553 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:33:07,553 INFO L85 PathProgramCache]: Analyzing trace with hash 407892415, now seen corresponding path program 1 times [2022-03-20 13:33:07,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:33:07,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036173510] [2022-03-20 13:33:07,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:33:07,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:33:07,559 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:33:07,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056648684] [2022-03-20 13:33:07,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:33:07,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:33:07,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:33:07,561 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 13:33:07,585 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 13:33:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:33:07,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 13:33:07,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:33:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-20 13:33:08,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:33:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-20 13:33:08,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:33:08,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036173510] [2022-03-20 13:33:08,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:33:08,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056648684] [2022-03-20 13:33:08,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056648684] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:33:08,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:33:08,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 42 [2022-03-20 13:33:08,690 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:33:08,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1513290622] [2022-03-20 13:33:08,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1513290622] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:33:08,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:33:08,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 13:33:08,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910553926] [2022-03-20 13:33:08,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:33:08,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 13:33:08,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:08,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 13:33:08,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1694, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 13:33:08,691 INFO L87 Difference]: Start difference. First operand 537 states and 620 transitions. Second operand has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:33:09,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:33:09,290 INFO L93 Difference]: Finished difference Result 555 states and 641 transitions. [2022-03-20 13:33:09,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 13:33:09,290 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-03-20 13:33:09,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:33:09,295 INFO L225 Difference]: With dead ends: 555 [2022-03-20 13:33:09,295 INFO L226 Difference]: Without dead ends: 549 [2022-03-20 13:33:09,299 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=2120, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 13:33:09,299 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:33:09,299 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 574 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:33:09,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-03-20 13:33:09,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 547. [2022-03-20 13:33:09,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 460 states have (on average 1.1717391304347826) internal successors, (539), 512 states have internal predecessors, (539), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (63), 29 states have call predecessors, (63), 29 states have call successors, (63) [2022-03-20 13:33:09,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 633 transitions. [2022-03-20 13:33:09,580 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 633 transitions. Word has length 52 [2022-03-20 13:33:09,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:33:09,580 INFO L478 AbstractCegarLoop]: Abstraction has 547 states and 633 transitions. [2022-03-20 13:33:09,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:33:09,580 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 633 transitions. [2022-03-20 13:33:09,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 13:33:09,584 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:33:09,584 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:33:09,601 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 13:33:09,785 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,SelfDestructingSolverStorable66 [2022-03-20 13:33:09,785 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:33:09,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:33:09,785 INFO L85 PathProgramCache]: Analyzing trace with hash 141746317, now seen corresponding path program 60 times [2022-03-20 13:33:09,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:09,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [806656940] [2022-03-20 13:33:09,824 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:33:09,824 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:33:09,824 INFO L85 PathProgramCache]: Analyzing trace with hash -334383188, now seen corresponding path program 1 times [2022-03-20 13:33:09,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:33:09,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534470479] [2022-03-20 13:33:09,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:33:09,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:33:09,829 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:33:09,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460926742] [2022-03-20 13:33:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:33:09,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:33:09,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:33:09,830 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 13:33:09,839 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 13:33:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:33:09,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-20 13:33:09,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:33:31,070 WARN L833 $PredicateComparison]: unable to prove that (and (exists ((v_correct_version_~i~0_619 Int) (correct_version_~i~0 Int) (correct_version_~a Int)) (and (<= c_main_~a~0 correct_version_~a) (forall ((v_it_66 Int)) (or (not (<= (+ v_correct_version_~i~0_619 v_it_66 1) correct_version_~i~0)) (< (* v_it_66 correct_version_~a) c_main_~n~0))) (<= v_correct_version_~i~0_619 0) (< 5 correct_version_~i~0))) (<= 1 c_main_~a~0) (< 0 c_main_~n~0)) is different from false [2022-03-20 13:33:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 13:33:32,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:33:45,320 WARN L232 SmtUtils]: Spent 8.34s on a formula simplification. DAG size of input: 67 DAG size of output: 59 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-03-20 13:33:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 13:33:52,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:33:52,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534470479] [2022-03-20 13:33:52,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:33:52,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460926742] [2022-03-20 13:33:52,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460926742] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:33:52,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:33:52,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2022-03-20 13:34:03,637 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:34:03,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [806656940] [2022-03-20 13:34:03,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [806656940] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:34:03,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:34:03,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 13:34:03,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021830801] [2022-03-20 13:34:03,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:34:03,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 13:34:03,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:34:03,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 13:34:03,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1705, Unknown=21, NotChecked=86, Total=2070 [2022-03-20 13:34:03,639 INFO L87 Difference]: Start difference. First operand 547 states and 633 transitions. Second operand has 27 states, 24 states have (on average 1.625) internal successors, (39), 26 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:34:13,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:34:13,536 INFO L93 Difference]: Finished difference Result 558 states and 643 transitions. [2022-03-20 13:34:13,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 13:34:13,536 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.625) internal successors, (39), 26 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 52 [2022-03-20 13:34:13,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:34:13,539 INFO L225 Difference]: With dead ends: 558 [2022-03-20 13:34:13,539 INFO L226 Difference]: Without dead ends: 542 [2022-03-20 13:34:13,543 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 49.3s TimeCoverageRelationStatistics Valid=296, Invalid=1941, Unknown=23, NotChecked=92, Total=2352 [2022-03-20 13:34:13,543 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 43 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:34:13,543 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 747 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 321 Invalid, 0 Unknown, 247 Unchecked, 0.2s Time] [2022-03-20 13:34:13,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-03-20 13:34:13,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 540. [2022-03-20 13:34:13,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 453 states have (on average 1.1721854304635762) internal successors, (531), 505 states have internal predecessors, (531), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (57), 29 states have call predecessors, (57), 29 states have call successors, (57) [2022-03-20 13:34:13,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 619 transitions. [2022-03-20 13:34:13,822 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 619 transitions. Word has length 52 [2022-03-20 13:34:13,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:34:13,822 INFO L478 AbstractCegarLoop]: Abstraction has 540 states and 619 transitions. [2022-03-20 13:34:13,822 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.625) internal successors, (39), 26 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:34:13,822 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 619 transitions. [2022-03-20 13:34:13,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 13:34:13,826 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:34:13,826 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:34:13,843 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 13:34:14,027 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,SelfDestructingSolverStorable67 [2022-03-20 13:34:14,027 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:34:14,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:34:14,027 INFO L85 PathProgramCache]: Analyzing trace with hash 833777245, now seen corresponding path program 61 times [2022-03-20 13:34:14,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:34:14,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [189972448] [2022-03-20 13:34:14,071 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:34:14,071 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:34:14,071 INFO L85 PathProgramCache]: Analyzing trace with hash -291599044, now seen corresponding path program 1 times [2022-03-20 13:34:14,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:34:14,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731355949] [2022-03-20 13:34:14,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:34:14,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:34:14,075 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:34:14,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722532183] [2022-03-20 13:34:14,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:34:14,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:34:14,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:34:14,076 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 13:34:14,077 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 13:34:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:34:14,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 13:34:14,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:34:14,565 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:34:14,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:34:15,025 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:34:15,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:34:15,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731355949] [2022-03-20 13:34:15,025 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:34:15,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722532183] [2022-03-20 13:34:15,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722532183] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:34:15,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:34:15,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 40 [2022-03-20 13:34:15,074 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:34:15,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [189972448] [2022-03-20 13:34:15,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [189972448] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:34:15,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:34:15,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 13:34:15,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109093272] [2022-03-20 13:34:15,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:34:15,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 13:34:15,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:34:15,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 13:34:15,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1540, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 13:34:15,075 INFO L87 Difference]: Start difference. First operand 540 states and 619 transitions. Second operand has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:34:15,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:34:15,845 INFO L93 Difference]: Finished difference Result 546 states and 624 transitions. [2022-03-20 13:34:15,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 13:34:15,845 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-03-20 13:34:15,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:34:15,848 INFO L225 Difference]: With dead ends: 546 [2022-03-20 13:34:15,848 INFO L226 Difference]: Without dead ends: 526 [2022-03-20 13:34:15,851 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=1946, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 13:34:15,851 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 59 mSDsluCounter, 1688 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1760 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:34:15,851 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1760 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:34:15,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-03-20 13:34:16,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2022-03-20 13:34:16,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 442 states have (on average 1.1719457013574661) internal successors, (518), 492 states have internal predecessors, (518), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (55), 28 states have call predecessors, (55), 28 states have call successors, (55) [2022-03-20 13:34:16,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 603 transitions. [2022-03-20 13:34:16,135 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 603 transitions. Word has length 52 [2022-03-20 13:34:16,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:34:16,135 INFO L478 AbstractCegarLoop]: Abstraction has 526 states and 603 transitions. [2022-03-20 13:34:16,135 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:34:16,135 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 603 transitions. [2022-03-20 13:34:16,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 13:34:16,141 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:34:16,141 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 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, 1, 1, 1] [2022-03-20 13:34:16,167 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 13:34:16,355 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,SelfDestructingSolverStorable68 [2022-03-20 13:34:16,355 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:34:16,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:34:16,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1113039232, now seen corresponding path program 62 times [2022-03-20 13:34:16,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:34:16,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2147114011] [2022-03-20 13:34:16,407 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:34:16,408 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:34:16,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1407304991, now seen corresponding path program 1 times [2022-03-20 13:34:16,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:34:16,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936413455] [2022-03-20 13:34:16,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:34:16,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:34:16,412 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:34:16,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145168421] [2022-03-20 13:34:16,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:34:16,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:34:16,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:34:16,414 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 13:34:16,419 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 13:34:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:34:16,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 13:34:16,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:34:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:34:16,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:34:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:34:17,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:34:17,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936413455] [2022-03-20 13:34:17,401 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:34:17,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145168421] [2022-03-20 13:34:17,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145168421] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:34:17,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:34:17,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 38 [2022-03-20 13:34:17,441 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:34:17,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2147114011] [2022-03-20 13:34:17,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2147114011] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:34:17,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:34:17,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 13:34:17,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323190503] [2022-03-20 13:34:17,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:34:17,442 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 13:34:17,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:34:17,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 13:34:17,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1394, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 13:34:17,443 INFO L87 Difference]: Start difference. First operand 526 states and 603 transitions. Second operand has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:34:18,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:34:18,558 INFO L93 Difference]: Finished difference Result 532 states and 608 transitions. [2022-03-20 13:34:18,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 13:34:18,558 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-03-20 13:34:18,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:34:18,560 INFO L225 Difference]: With dead ends: 532 [2022-03-20 13:34:18,560 INFO L226 Difference]: Without dead ends: 514 [2022-03-20 13:34:18,563 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 61 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=1780, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 13:34:18,564 INFO L913 BasicCegarLoop]: 108 mSDtfsCounter, 95 mSDsluCounter, 3053 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 3161 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:34:18,564 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 3161 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 13:34:18,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-03-20 13:34:18,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2022-03-20 13:34:18,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 433 states have (on average 1.1709006928406467) internal successors, (507), 481 states have internal predecessors, (507), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (53), 27 states have call predecessors, (53), 27 states have call successors, (53) [2022-03-20 13:34:18,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 589 transitions. [2022-03-20 13:34:18,833 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 589 transitions. Word has length 52 [2022-03-20 13:34:18,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:34:18,833 INFO L478 AbstractCegarLoop]: Abstraction has 514 states and 589 transitions. [2022-03-20 13:34:18,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:34:18,833 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 589 transitions. [2022-03-20 13:34:18,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 13:34:18,837 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:34:18,837 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:34:18,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-20 13:34:19,037 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,SelfDestructingSolverStorable69 [2022-03-20 13:34:19,037 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:34:19,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:34:19,038 INFO L85 PathProgramCache]: Analyzing trace with hash -2068699601, now seen corresponding path program 63 times [2022-03-20 13:34:19,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:34:19,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1412029206] [2022-03-20 13:34:19,077 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:34:19,078 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:34:19,078 INFO L85 PathProgramCache]: Analyzing trace with hash -197602162, now seen corresponding path program 1 times [2022-03-20 13:34:19,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:34:19,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520562780] [2022-03-20 13:34:19,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:34:19,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:34:19,082 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:34:19,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295367264] [2022-03-20 13:34:19,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:34:19,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:34:19,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:34:19,084 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 13:34:19,085 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 13:34:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:34:19,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 13:34:19,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:34:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:34:21,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:34:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:34:24,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:34:24,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520562780] [2022-03-20 13:34:24,825 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:34:24,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295367264] [2022-03-20 13:34:24,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295367264] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:34:24,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:34:24,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 41 [2022-03-20 13:34:25,813 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:34:25,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1412029206] [2022-03-20 13:34:25,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1412029206] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:34:25,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:34:25,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 13:34:25,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832721039] [2022-03-20 13:34:25,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:34:25,813 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 13:34:25,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:34:25,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 13:34:25,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1900, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 13:34:25,814 INFO L87 Difference]: Start difference. First operand 514 states and 589 transitions. Second operand has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 27 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:34:29,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:34:29,055 INFO L93 Difference]: Finished difference Result 602 states and 697 transitions. [2022-03-20 13:34:29,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 13:34:29,057 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 27 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-03-20 13:34:29,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:34:29,065 INFO L225 Difference]: With dead ends: 602 [2022-03-20 13:34:29,065 INFO L226 Difference]: Without dead ends: 591 [2022-03-20 13:34:29,070 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=491, Invalid=3291, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 13:34:29,070 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 265 mSDsluCounter, 1456 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1526 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:34:29,070 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 1526 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 801 Invalid, 0 Unknown, 1 Unchecked, 0.8s Time] [2022-03-20 13:34:29,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-03-20 13:34:29,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 582. [2022-03-20 13:34:29,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 489 states have (on average 1.1697341513292434) internal successors, (572), 545 states have internal predecessors, (572), 33 states have call successors, (33), 5 states have call predecessors, (33), 59 states have return successors, (65), 31 states have call predecessors, (65), 31 states have call successors, (65) [2022-03-20 13:34:29,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 670 transitions. [2022-03-20 13:34:29,516 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 670 transitions. Word has length 52 [2022-03-20 13:34:29,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:34:29,516 INFO L478 AbstractCegarLoop]: Abstraction has 582 states and 670 transitions. [2022-03-20 13:34:29,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 27 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:34:29,517 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 670 transitions. [2022-03-20 13:34:29,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 13:34:29,523 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:34:29,523 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:34:29,546 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 13:34:29,746 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:34:29,747 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:34:29,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:34:29,747 INFO L85 PathProgramCache]: Analyzing trace with hash 333057708, now seen corresponding path program 64 times [2022-03-20 13:34:29,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:34:29,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [838760679] [2022-03-20 13:34:29,800 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:34:29,800 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:34:29,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1554908363, now seen corresponding path program 1 times [2022-03-20 13:34:29,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:34:29,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357484368] [2022-03-20 13:34:29,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:34:29,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:34:29,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:34:29,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321575527] [2022-03-20 13:34:29,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:34:29,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:34:29,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:34:29,807 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 13:34:29,809 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 13:34:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:34:29,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 13:34:29,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:34:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:34:32,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:34:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:34:35,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:34:35,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357484368] [2022-03-20 13:34:35,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:34:35,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321575527] [2022-03-20 13:34:35,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321575527] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:34:35,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:34:35,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 41 [2022-03-20 13:34:37,059 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:34:37,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [838760679] [2022-03-20 13:34:37,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [838760679] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:34:37,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:34:37,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 13:34:37,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774960889] [2022-03-20 13:34:37,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:34:37,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 13:34:37,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:34:37,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 13:34:37,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1900, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 13:34:37,061 INFO L87 Difference]: Start difference. First operand 582 states and 670 transitions. Second operand has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 27 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:34:38,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:34:38,818 INFO L93 Difference]: Finished difference Result 597 states and 685 transitions. [2022-03-20 13:34:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 13:34:38,823 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 27 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-03-20 13:34:38,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:34:38,826 INFO L225 Difference]: With dead ends: 597 [2022-03-20 13:34:38,826 INFO L226 Difference]: Without dead ends: 585 [2022-03-20 13:34:38,830 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=183, Invalid=1979, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 13:34:38,830 INFO L913 BasicCegarLoop]: 110 mSDtfsCounter, 100 mSDsluCounter, 2259 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 2369 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:34:38,830 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 2369 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1241 Invalid, 0 Unknown, 61 Unchecked, 1.3s Time] [2022-03-20 13:34:38,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-03-20 13:34:39,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 583. [2022-03-20 13:34:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 490 states have (on average 1.1693877551020408) internal successors, (573), 546 states have internal predecessors, (573), 33 states have call successors, (33), 5 states have call predecessors, (33), 59 states have return successors, (60), 31 states have call predecessors, (60), 31 states have call successors, (60) [2022-03-20 13:34:39,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 666 transitions. [2022-03-20 13:34:39,145 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 666 transitions. Word has length 52 [2022-03-20 13:34:39,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:34:39,145 INFO L478 AbstractCegarLoop]: Abstraction has 583 states and 666 transitions. [2022-03-20 13:34:39,145 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 27 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:34:39,145 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 666 transitions. [2022-03-20 13:34:39,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 13:34:39,152 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:34:39,152 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:34:39,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-20 13:34:39,374 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:34:39,374 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:34:39,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:34:39,375 INFO L85 PathProgramCache]: Analyzing trace with hash 37231482, now seen corresponding path program 65 times [2022-03-20 13:34:39,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:34:39,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [279178076] [2022-03-20 13:34:39,425 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:34:39,425 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:34:39,425 INFO L85 PathProgramCache]: Analyzing trace with hash 608082299, now seen corresponding path program 1 times [2022-03-20 13:34:39,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:34:39,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361059653] [2022-03-20 13:34:39,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:34:39,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:34:39,430 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:34:39,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010645119] [2022-03-20 13:34:39,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:34:39,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:34:39,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:34:39,432 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 13:34:39,433 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 13:34:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:34:39,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 13:34:39,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:34:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-20 13:34:39,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:34:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-20 13:34:40,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:34:40,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361059653] [2022-03-20 13:34:40,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:34:40,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010645119] [2022-03-20 13:34:40,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010645119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:34:40,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:34:40,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2022-03-20 13:34:40,052 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:34:40,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [279178076] [2022-03-20 13:34:40,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [279178076] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:34:40,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:34:40,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 13:34:40,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903607093] [2022-03-20 13:34:40,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:34:40,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 13:34:40,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:34:40,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 13:34:40,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-03-20 13:34:40,053 INFO L87 Difference]: Start difference. First operand 583 states and 666 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 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 13:34:40,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:34:40,873 INFO L93 Difference]: Finished difference Result 735 states and 846 transitions. [2022-03-20 13:34:40,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 13:34:40,876 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 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 53 [2022-03-20 13:34:40,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:34:40,879 INFO L225 Difference]: With dead ends: 735 [2022-03-20 13:34:40,879 INFO L226 Difference]: Without dead ends: 693 [2022-03-20 13:34:40,885 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=513, Invalid=1379, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 13:34:40,885 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 94 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:34:40,886 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 414 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:34:40,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-03-20 13:34:41,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 666. [2022-03-20 13:34:41,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 573 states have (on average 1.162303664921466) internal successors, (666), 629 states have internal predecessors, (666), 33 states have call successors, (33), 5 states have call predecessors, (33), 59 states have return successors, (60), 31 states have call predecessors, (60), 31 states have call successors, (60) [2022-03-20 13:34:41,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 759 transitions. [2022-03-20 13:34:41,243 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 759 transitions. Word has length 53 [2022-03-20 13:34:41,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:34:41,244 INFO L478 AbstractCegarLoop]: Abstraction has 666 states and 759 transitions. [2022-03-20 13:34:41,244 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 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 13:34:41,244 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 759 transitions. [2022-03-20 13:34:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 13:34:41,249 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:34:41,249 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:34:41,265 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 13:34:41,449 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:34:41,450 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:34:41,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:34:41,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1234429601, now seen corresponding path program 66 times [2022-03-20 13:34:41,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:34:41,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [609501091] [2022-03-20 13:34:41,492 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:34:41,493 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:34:41,493 INFO L85 PathProgramCache]: Analyzing trace with hash 684607392, now seen corresponding path program 1 times [2022-03-20 13:34:41,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:34:41,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423669092] [2022-03-20 13:34:41,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:34:41,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:34:41,498 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:34:41,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610678895] [2022-03-20 13:34:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:34:41,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:34:41,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:34:41,499 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 13:34:41,504 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 13:34:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:34:41,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-20 13:34:41,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:34:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:34:57,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:35:05,317 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-20 13:35:05,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:35:05,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423669092] [2022-03-20 13:35:05,317 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:35:05,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610678895] [2022-03-20 13:35:05,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610678895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:35:05,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:35:05,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 21] total 50 [2022-03-20 13:35:08,199 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:35:08,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [609501091] [2022-03-20 13:35:08,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [609501091] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:35:08,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:35:08,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 13:35:08,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427179725] [2022-03-20 13:35:08,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:35:08,199 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 13:35:08,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:35:08,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 13:35:08,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=2819, Unknown=1, NotChecked=0, Total=3192 [2022-03-20 13:35:08,200 INFO L87 Difference]: Start difference. First operand 666 states and 759 transitions. Second operand has 37 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 35 states have internal predecessors, (45), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:35:11,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:35:11,310 INFO L93 Difference]: Finished difference Result 723 states and 831 transitions. [2022-03-20 13:35:11,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 13:35:11,311 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 35 states have internal predecessors, (45), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 53 [2022-03-20 13:35:11,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:35:11,323 INFO L225 Difference]: With dead ends: 723 [2022-03-20 13:35:11,323 INFO L226 Difference]: Without dead ends: 706 [2022-03-20 13:35:11,329 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=431, Invalid=3228, Unknown=1, NotChecked=0, Total=3660 [2022-03-20 13:35:11,329 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:35:11,329 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 915 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 618 Invalid, 0 Unknown, 249 Unchecked, 0.4s Time] [2022-03-20 13:35:11,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-03-20 13:35:11,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 658. [2022-03-20 13:35:11,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 565 states have (on average 1.1628318584070796) internal successors, (657), 621 states have internal predecessors, (657), 33 states have call successors, (33), 5 states have call predecessors, (33), 59 states have return successors, (60), 31 states have call predecessors, (60), 31 states have call successors, (60) [2022-03-20 13:35:11,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 750 transitions. [2022-03-20 13:35:11,682 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 750 transitions. Word has length 53 [2022-03-20 13:35:11,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:35:11,682 INFO L478 AbstractCegarLoop]: Abstraction has 658 states and 750 transitions. [2022-03-20 13:35:11,683 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 35 states have internal predecessors, (45), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:35:11,683 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 750 transitions. [2022-03-20 13:35:11,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 13:35:11,690 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:35:11,690 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:35:11,716 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 13:35:11,903 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,SelfDestructingSolverStorable73 [2022-03-20 13:35:11,903 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:35:11,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:35:11,904 INFO L85 PathProgramCache]: Analyzing trace with hash 299090957, now seen corresponding path program 67 times [2022-03-20 13:35:11,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:35:11,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [242071574] [2022-03-20 13:35:11,951 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:35:11,952 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:35:11,952 INFO L85 PathProgramCache]: Analyzing trace with hash -728653170, now seen corresponding path program 1 times [2022-03-20 13:35:11,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:35:11,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239267263] [2022-03-20 13:35:11,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:35:11,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:35:11,956 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:35:11,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187620338] [2022-03-20 13:35:11,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:35:11,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:35:11,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:35:11,958 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 13:35:11,958 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 13:35:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:35:12,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 13:35:12,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:35:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 13:35:12,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:35:13,025 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 13:35:13,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:35:13,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239267263] [2022-03-20 13:35:13,025 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:35:13,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187620338] [2022-03-20 13:35:13,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187620338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:35:13,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:35:13,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 42 [2022-03-20 13:35:13,062 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:35:13,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [242071574] [2022-03-20 13:35:13,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [242071574] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:35:13,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:35:13,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 13:35:13,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628259737] [2022-03-20 13:35:13,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:35:13,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 13:35:13,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:35:13,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 13:35:13,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1698, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 13:35:13,063 INFO L87 Difference]: Start difference. First operand 658 states and 750 transitions. Second operand has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:35:13,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:35:13,887 INFO L93 Difference]: Finished difference Result 664 states and 755 transitions. [2022-03-20 13:35:13,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 13:35:13,887 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-03-20 13:35:13,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:35:13,890 INFO L225 Difference]: With dead ends: 664 [2022-03-20 13:35:13,890 INFO L226 Difference]: Without dead ends: 643 [2022-03-20 13:35:13,895 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 59 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=2124, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 13:35:13,895 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 47 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:35:13,895 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1292 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:35:13,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-03-20 13:35:14,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 643. [2022-03-20 13:35:14,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 553 states have (on average 1.162748643761302) internal successors, (643), 607 states have internal predecessors, (643), 32 states have call successors, (32), 5 states have call predecessors, (32), 57 states have return successors, (58), 30 states have call predecessors, (58), 30 states have call successors, (58) [2022-03-20 13:35:14,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 733 transitions. [2022-03-20 13:35:14,236 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 733 transitions. Word has length 53 [2022-03-20 13:35:14,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:35:14,236 INFO L478 AbstractCegarLoop]: Abstraction has 643 states and 733 transitions. [2022-03-20 13:35:14,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:35:14,237 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 733 transitions. [2022-03-20 13:35:14,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 13:35:14,241 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:35:14,242 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:35:14,258 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 13:35:14,442 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:35:14,442 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:35:14,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:35:14,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1472762858, now seen corresponding path program 68 times [2022-03-20 13:35:14,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:35:14,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2065077445] [2022-03-20 13:35:14,487 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:35:14,488 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:35:14,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1793204907, now seen corresponding path program 1 times [2022-03-20 13:35:14,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:35:14,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771789188] [2022-03-20 13:35:14,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:35:14,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:35:14,492 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:35:14,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420811538] [2022-03-20 13:35:14,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:35:14,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:35:14,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:35:14,494 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 13:35:14,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-20 13:35:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:35:14,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 13:35:14,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:35:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 13:35:15,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:35:15,529 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 13:35:15,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:35:15,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771789188] [2022-03-20 13:35:15,530 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:35:15,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420811538] [2022-03-20 13:35:15,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420811538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:35:15,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:35:15,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 40 [2022-03-20 13:35:15,571 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:35:15,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2065077445] [2022-03-20 13:35:15,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2065077445] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:35:15,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:35:15,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 13:35:15,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523460019] [2022-03-20 13:35:15,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:35:15,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 13:35:15,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:35:15,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 13:35:15,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1544, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 13:35:15,572 INFO L87 Difference]: Start difference. First operand 643 states and 733 transitions. Second operand has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:35:16,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:35:16,540 INFO L93 Difference]: Finished difference Result 649 states and 738 transitions. [2022-03-20 13:35:16,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 13:35:16,540 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-03-20 13:35:16,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:35:16,543 INFO L225 Difference]: With dead ends: 649 [2022-03-20 13:35:16,543 INFO L226 Difference]: Without dead ends: 630 [2022-03-20 13:35:16,547 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 59 SyntacticMatches, 10 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=1950, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 13:35:16,547 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 83 mSDsluCounter, 2358 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 2454 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:35:16,547 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 2454 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:35:16,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-03-20 13:35:16,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 630. [2022-03-20 13:35:16,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 543 states have (on average 1.1620626151012892) internal successors, (631), 595 states have internal predecessors, (631), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2022-03-20 13:35:16,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 718 transitions. [2022-03-20 13:35:16,889 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 718 transitions. Word has length 53 [2022-03-20 13:35:16,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:35:16,889 INFO L478 AbstractCegarLoop]: Abstraction has 630 states and 718 transitions. [2022-03-20 13:35:16,890 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:35:16,890 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 718 transitions. [2022-03-20 13:35:16,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 13:35:16,897 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:35:16,897 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:35:16,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-20 13:35:17,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:35:17,112 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:35:17,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:35:17,112 INFO L85 PathProgramCache]: Analyzing trace with hash 715381933, now seen corresponding path program 69 times [2022-03-20 13:35:17,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:35:17,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [980457881] [2022-03-20 13:35:17,185 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:35:17,185 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:35:17,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1910957138, now seen corresponding path program 1 times [2022-03-20 13:35:17,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:35:17,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996721983] [2022-03-20 13:35:17,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:35:17,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:35:17,191 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:35:17,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027454548] [2022-03-20 13:35:17,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:35:17,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:35:17,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:35:17,193 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:35:17,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-20 13:35:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:35:17,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 13:35:17,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:35:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:35:17,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:35:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:35:18,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:35:18,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996721983] [2022-03-20 13:35:18,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:35:18,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027454548] [2022-03-20 13:35:18,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027454548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:35:18,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:35:18,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 38 [2022-03-20 13:35:18,332 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:35:18,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [980457881] [2022-03-20 13:35:18,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [980457881] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:35:18,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:35:18,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 13:35:18,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965715449] [2022-03-20 13:35:18,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:35:18,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 13:35:18,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:35:18,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 13:35:18,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1398, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 13:35:18,333 INFO L87 Difference]: Start difference. First operand 630 states and 718 transitions. Second operand has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 32 states have internal predecessors, (45), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:35:19,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:35:19,532 INFO L93 Difference]: Finished difference Result 733 states and 837 transitions. [2022-03-20 13:35:19,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 13:35:19,533 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 32 states have internal predecessors, (45), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-03-20 13:35:19,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:35:19,539 INFO L225 Difference]: With dead ends: 733 [2022-03-20 13:35:19,539 INFO L226 Difference]: Without dead ends: 727 [2022-03-20 13:35:19,543 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 58 SyntacticMatches, 13 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=1784, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 13:35:19,544 INFO L913 BasicCegarLoop]: 129 mSDtfsCounter, 120 mSDsluCounter, 3805 mSDsCounter, 0 mSdLazyCounter, 1563 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 3934 SdHoareTripleChecker+Invalid, 1568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:35:19,544 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 3934 Invalid, 1568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1563 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 13:35:19,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-03-20 13:35:19,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 646. [2022-03-20 13:35:19,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 556 states have (on average 1.1636690647482015) internal successors, (647), 610 states have internal predecessors, (647), 32 states have call successors, (32), 5 states have call predecessors, (32), 57 states have return successors, (59), 30 states have call predecessors, (59), 30 states have call successors, (59) [2022-03-20 13:35:19,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 738 transitions. [2022-03-20 13:35:19,898 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 738 transitions. Word has length 53 [2022-03-20 13:35:19,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:35:19,899 INFO L478 AbstractCegarLoop]: Abstraction has 646 states and 738 transitions. [2022-03-20 13:35:19,899 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 32 states have internal predecessors, (45), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:35:19,899 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 738 transitions. [2022-03-20 13:35:19,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 13:35:19,906 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:35:19,906 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:35:19,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-20 13:35:20,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-20 13:35:20,115 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:35:20,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:35:20,116 INFO L85 PathProgramCache]: Analyzing trace with hash 354432654, now seen corresponding path program 70 times [2022-03-20 13:35:20,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:35:20,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1779399966] [2022-03-20 13:35:20,174 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:35:20,175 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:35:20,175 INFO L85 PathProgramCache]: Analyzing trace with hash -613601427, now seen corresponding path program 1 times [2022-03-20 13:35:20,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:35:20,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787732432] [2022-03-20 13:35:20,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:35:20,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:35:20,180 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:35:20,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396397768] [2022-03-20 13:35:20,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:35:20,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:35:20,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:35:20,181 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:35:20,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-20 13:35:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:35:20,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 13:35:20,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:35:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 13:35:33,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:35:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 13:35:41,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:35:41,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787732432] [2022-03-20 13:35:41,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:35:41,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396397768] [2022-03-20 13:35:41,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396397768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:35:41,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:35:41,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2022-03-20 13:35:43,777 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:35:43,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1779399966] [2022-03-20 13:35:43,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1779399966] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:35:43,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:35:43,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 13:35:43,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903611503] [2022-03-20 13:35:43,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:35:43,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 13:35:43,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:35:43,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 13:35:43,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2030, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 13:35:43,779 INFO L87 Difference]: Start difference. First operand 646 states and 738 transitions. Second operand has 27 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 26 states have internal predecessors, (40), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:35:44,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:35:44,588 INFO L93 Difference]: Finished difference Result 724 states and 839 transitions. [2022-03-20 13:35:44,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 13:35:44,594 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 26 states have internal predecessors, (40), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 54 [2022-03-20 13:35:44,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:35:44,607 INFO L225 Difference]: With dead ends: 724 [2022-03-20 13:35:44,607 INFO L226 Difference]: Without dead ends: 713 [2022-03-20 13:35:44,612 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=226, Invalid=2030, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 13:35:44,612 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 51 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1337 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:35:44,612 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 1337 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 277 Invalid, 0 Unknown, 300 Unchecked, 0.4s Time] [2022-03-20 13:35:44,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-03-20 13:35:45,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 709. [2022-03-20 13:35:45,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 598 states have (on average 1.1622073578595318) internal successors, (695), 666 states have internal predecessors, (695), 39 states have call successors, (39), 5 states have call predecessors, (39), 71 states have return successors, (80), 37 states have call predecessors, (80), 37 states have call successors, (80) [2022-03-20 13:35:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 814 transitions. [2022-03-20 13:35:45,047 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 814 transitions. Word has length 54 [2022-03-20 13:35:45,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:35:45,047 INFO L478 AbstractCegarLoop]: Abstraction has 709 states and 814 transitions. [2022-03-20 13:35:45,047 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 26 states have internal predecessors, (40), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:35:45,047 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 814 transitions. [2022-03-20 13:35:45,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 13:35:45,053 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:35:45,053 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:35:45,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-20 13:35:45,254 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-20 13:35:45,254 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:35:45,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:35:45,254 INFO L85 PathProgramCache]: Analyzing trace with hash 2082848173, now seen corresponding path program 71 times [2022-03-20 13:35:45,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:35:45,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [856637233] [2022-03-20 13:35:45,311 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:35:45,311 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:35:45,311 INFO L85 PathProgramCache]: Analyzing trace with hash -41087412, now seen corresponding path program 1 times [2022-03-20 13:35:45,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:35:45,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838158769] [2022-03-20 13:35:45,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:35:45,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:35:45,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:35:45,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707906477] [2022-03-20 13:35:45,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:35:45,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:35:45,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:35:45,317 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:35:45,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-20 13:35:45,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:35:45,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 13:35:45,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:35:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 13:35:45,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:35:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 13:35:45,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:35:45,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838158769] [2022-03-20 13:35:45,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:35:45,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707906477] [2022-03-20 13:35:45,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707906477] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:35:45,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:35:45,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-03-20 13:35:45,989 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:35:45,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [856637233] [2022-03-20 13:35:45,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [856637233] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:35:45,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:35:45,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 13:35:45,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287853086] [2022-03-20 13:35:45,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:35:45,989 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 13:35:45,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:35:45,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 13:35:45,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2022-03-20 13:35:45,990 INFO L87 Difference]: Start difference. First operand 709 states and 814 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 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 13:35:46,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:35:46,495 INFO L93 Difference]: Finished difference Result 751 states and 864 transitions. [2022-03-20 13:35:46,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 13:35:46,507 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 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 54 [2022-03-20 13:35:46,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:35:46,511 INFO L225 Difference]: With dead ends: 751 [2022-03-20 13:35:46,511 INFO L226 Difference]: Without dead ends: 718 [2022-03-20 13:35:46,517 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2022-03-20 13:35:46,517 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 85 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:35:46,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 246 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:35:46,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-03-20 13:35:46,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 718. [2022-03-20 13:35:46,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 607 states have (on average 1.1598023064250411) internal successors, (704), 675 states have internal predecessors, (704), 39 states have call successors, (39), 5 states have call predecessors, (39), 71 states have return successors, (80), 37 states have call predecessors, (80), 37 states have call successors, (80) [2022-03-20 13:35:46,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 823 transitions. [2022-03-20 13:35:46,967 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 823 transitions. Word has length 54 [2022-03-20 13:35:46,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:35:46,967 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 823 transitions. [2022-03-20 13:35:46,967 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 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 13:35:46,967 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 823 transitions. [2022-03-20 13:35:46,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 13:35:46,973 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:35:46,973 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:35:46,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-20 13:35:47,173 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:35:47,174 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:35:47,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:35:47,174 INFO L85 PathProgramCache]: Analyzing trace with hash -779814883, now seen corresponding path program 72 times [2022-03-20 13:35:47,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:35:47,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [848935998] [2022-03-20 13:35:47,224 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:35:47,224 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:35:47,224 INFO L85 PathProgramCache]: Analyzing trace with hash 235315324, now seen corresponding path program 1 times [2022-03-20 13:35:47,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:35:47,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372496123] [2022-03-20 13:35:47,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:35:47,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:35:47,230 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:35:47,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698964002] [2022-03-20 13:35:47,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:35:47,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:35:47,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:35:47,231 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:35:47,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-20 13:35:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:35:47,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 13:35:47,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:35:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-20 13:35:47,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:35:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-20 13:35:48,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:35:48,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372496123] [2022-03-20 13:35:48,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:35:48,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698964002] [2022-03-20 13:35:48,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698964002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:35:48,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:35:48,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 44 [2022-03-20 13:35:48,324 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:35:48,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [848935998] [2022-03-20 13:35:48,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [848935998] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:35:48,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:35:48,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 13:35:48,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459572467] [2022-03-20 13:35:48,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:35:48,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 13:35:48,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:35:48,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 13:35:48,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1864, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 13:35:48,325 INFO L87 Difference]: Start difference. First operand 718 states and 823 transitions. Second operand has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:35:49,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:35:49,168 INFO L93 Difference]: Finished difference Result 724 states and 828 transitions. [2022-03-20 13:35:49,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 13:35:49,169 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-03-20 13:35:49,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:35:49,172 INFO L225 Difference]: With dead ends: 724 [2022-03-20 13:35:49,172 INFO L226 Difference]: Without dead ends: 713 [2022-03-20 13:35:49,178 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=140, Invalid=2310, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 13:35:49,178 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 35 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:35:49,178 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 909 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:35:49,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-03-20 13:35:49,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 710. [2022-03-20 13:35:49,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 602 states have (on average 1.159468438538206) internal successors, (698), 668 states have internal predecessors, (698), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (77), 36 states have call predecessors, (77), 36 states have call successors, (77) [2022-03-20 13:35:49,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 813 transitions. [2022-03-20 13:35:49,609 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 813 transitions. Word has length 54 [2022-03-20 13:35:49,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:35:49,610 INFO L478 AbstractCegarLoop]: Abstraction has 710 states and 813 transitions. [2022-03-20 13:35:49,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:35:49,610 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 813 transitions. [2022-03-20 13:35:49,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 13:35:49,615 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:35:49,615 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:35:49,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-20 13:35:49,816 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:35:49,816 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:35:49,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:35:49,816 INFO L85 PathProgramCache]: Analyzing trace with hash 612225024, now seen corresponding path program 73 times [2022-03-20 13:35:49,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:35:49,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2070890355] [2022-03-20 13:35:49,863 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:35:49,863 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:35:49,864 INFO L85 PathProgramCache]: Analyzing trace with hash 471453727, now seen corresponding path program 1 times [2022-03-20 13:35:49,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:35:49,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380855016] [2022-03-20 13:35:49,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:35:49,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:35:49,869 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:35:49,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329558498] [2022-03-20 13:35:49,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:35:49,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:35:49,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:35:49,870 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:35:49,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-20 13:35:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:35:49,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 13:35:49,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:35:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:35:50,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:35:51,000 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:35:51,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:35:51,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380855016] [2022-03-20 13:35:51,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:35:51,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329558498] [2022-03-20 13:35:51,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329558498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:35:51,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:35:51,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 42 [2022-03-20 13:35:51,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:35:51,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2070890355] [2022-03-20 13:35:51,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2070890355] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:35:51,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:35:51,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 13:35:51,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90977475] [2022-03-20 13:35:51,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:35:51,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 13:35:51,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:35:51,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 13:35:51,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1702, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 13:35:51,040 INFO L87 Difference]: Start difference. First operand 710 states and 813 transitions. Second operand has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:35:52,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:35:52,023 INFO L93 Difference]: Finished difference Result 716 states and 818 transitions. [2022-03-20 13:35:52,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 13:35:52,023 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-03-20 13:35:52,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:35:52,046 INFO L225 Difference]: With dead ends: 716 [2022-03-20 13:35:52,047 INFO L226 Difference]: Without dead ends: 696 [2022-03-20 13:35:52,054 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 58 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=2128, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 13:35:52,054 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 71 mSDsluCounter, 1966 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 2050 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:35:52,054 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 2050 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:35:52,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-03-20 13:35:52,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 696. [2022-03-20 13:35:52,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 591 states have (on average 1.1590524534686972) internal successors, (685), 655 states have internal predecessors, (685), 37 states have call successors, (37), 5 states have call predecessors, (37), 67 states have return successors, (75), 35 states have call predecessors, (75), 35 states have call successors, (75) [2022-03-20 13:35:52,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 797 transitions. [2022-03-20 13:35:52,458 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 797 transitions. Word has length 54 [2022-03-20 13:35:52,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:35:52,458 INFO L478 AbstractCegarLoop]: Abstraction has 696 states and 797 transitions. [2022-03-20 13:35:52,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:35:52,458 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 797 transitions. [2022-03-20 13:35:52,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 13:35:52,464 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:35:52,464 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 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, 1, 1, 1] [2022-03-20 13:35:52,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-20 13:35:52,664 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:35:52,665 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:35:52,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:35:52,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1199396989, now seen corresponding path program 74 times [2022-03-20 13:35:52,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:35:52,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [358841821] [2022-03-20 13:35:52,711 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:35:52,711 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:35:52,712 INFO L85 PathProgramCache]: Analyzing trace with hash -97275812, now seen corresponding path program 1 times [2022-03-20 13:35:52,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:35:52,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845893853] [2022-03-20 13:35:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:35:52,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:35:52,716 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:35:52,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631506694] [2022-03-20 13:35:52,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:35:52,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:35:52,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:35:52,717 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:35:52,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-20 13:35:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:35:52,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 13:35:52,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:35:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:35:53,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:35:53,844 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:35:53,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:35:53,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845893853] [2022-03-20 13:35:53,844 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:35:53,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631506694] [2022-03-20 13:35:53,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631506694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:35:53,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:35:53,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 40 [2022-03-20 13:35:53,888 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:35:53,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [358841821] [2022-03-20 13:35:53,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [358841821] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:35:53,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:35:53,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 13:35:53,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262142557] [2022-03-20 13:35:53,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:35:53,889 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 13:35:53,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:35:53,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 13:35:53,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1548, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 13:35:53,890 INFO L87 Difference]: Start difference. First operand 696 states and 797 transitions. Second operand has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 32 states have internal predecessors, (45), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:35:55,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:35:55,208 INFO L93 Difference]: Finished difference Result 702 states and 802 transitions. [2022-03-20 13:35:55,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 13:35:55,208 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 32 states have internal predecessors, (45), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-03-20 13:35:55,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:35:55,212 INFO L225 Difference]: With dead ends: 702 [2022-03-20 13:35:55,212 INFO L226 Difference]: Without dead ends: 684 [2022-03-20 13:35:55,223 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 57 SyntacticMatches, 14 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=116, Invalid=1954, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 13:35:55,223 INFO L913 BasicCegarLoop]: 120 mSDtfsCounter, 107 mSDsluCounter, 3730 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 3850 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:35:55,223 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 3850 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1620 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 13:35:55,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-03-20 13:35:55,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 684. [2022-03-20 13:35:55,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 582 states have (on average 1.1580756013745706) internal successors, (674), 644 states have internal predecessors, (674), 36 states have call successors, (36), 5 states have call predecessors, (36), 65 states have return successors, (73), 34 states have call predecessors, (73), 34 states have call successors, (73) [2022-03-20 13:35:55,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 783 transitions. [2022-03-20 13:35:55,688 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 783 transitions. Word has length 54 [2022-03-20 13:35:55,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:35:55,688 INFO L478 AbstractCegarLoop]: Abstraction has 684 states and 783 transitions. [2022-03-20 13:35:55,688 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 32 states have internal predecessors, (45), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:35:55,688 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 783 transitions. [2022-03-20 13:35:55,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 13:35:55,693 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:35:55,693 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:35:55,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-20 13:35:55,894 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:35:55,894 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:35:55,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:35:55,894 INFO L85 PathProgramCache]: Analyzing trace with hash -317468980, now seen corresponding path program 75 times [2022-03-20 13:35:55,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:35:55,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [308348454] [2022-03-20 13:35:55,964 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:35:55,964 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:35:55,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1524924011, now seen corresponding path program 1 times [2022-03-20 13:35:55,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:35:55,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631999702] [2022-03-20 13:35:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:35:55,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:35:55,968 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:35:55,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197798804] [2022-03-20 13:35:55,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:35:55,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:35:55,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:35:55,970 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:35:55,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-20 13:35:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:35:56,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 13:35:56,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:35:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:35:59,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:36:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:36:05,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:36:05,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631999702] [2022-03-20 13:36:05,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:36:05,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197798804] [2022-03-20 13:36:05,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197798804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:36:05,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:36:05,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 45 [2022-03-20 13:36:06,647 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:36:06,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [308348454] [2022-03-20 13:36:06,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [308348454] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:36:06,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:36:06,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 13:36:06,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319240236] [2022-03-20 13:36:06,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:36:06,648 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 13:36:06,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:36:06,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 13:36:06,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2264, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 13:36:06,648 INFO L87 Difference]: Start difference. First operand 684 states and 783 transitions. Second operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:36:11,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:36:11,657 INFO L93 Difference]: Finished difference Result 791 states and 917 transitions. [2022-03-20 13:36:11,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 13:36:11,663 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-03-20 13:36:11,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:36:11,679 INFO L225 Difference]: With dead ends: 791 [2022-03-20 13:36:11,679 INFO L226 Difference]: Without dead ends: 780 [2022-03-20 13:36:11,687 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=583, Invalid=3973, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 13:36:11,687 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 325 mSDsluCounter, 1898 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1973 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:36:11,687 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 1973 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 950 Invalid, 0 Unknown, 49 Unchecked, 1.2s Time] [2022-03-20 13:36:11,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-03-20 13:36:12,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 771. [2022-03-20 13:36:12,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 654 states have (on average 1.157492354740061) internal successors, (757), 726 states have internal predecessors, (757), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (90), 39 states have call predecessors, (90), 39 states have call successors, (90) [2022-03-20 13:36:12,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 888 transitions. [2022-03-20 13:36:12,153 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 888 transitions. Word has length 54 [2022-03-20 13:36:12,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:36:12,154 INFO L478 AbstractCegarLoop]: Abstraction has 771 states and 888 transitions. [2022-03-20 13:36:12,154 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:36:12,154 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 888 transitions. [2022-03-20 13:36:12,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 13:36:12,164 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:36:12,164 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:36:12,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-20 13:36:12,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:36:12,387 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:36:12,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:36:12,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1122563567, now seen corresponding path program 76 times [2022-03-20 13:36:12,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:36:12,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [462158939] [2022-03-20 13:36:12,438 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:36:12,439 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:36:12,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1809055054, now seen corresponding path program 1 times [2022-03-20 13:36:12,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:36:12,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989675049] [2022-03-20 13:36:12,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:36:12,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:36:12,443 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:36:12,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521507003] [2022-03-20 13:36:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:36:12,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:36:12,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:36:12,444 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:36:12,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-20 13:36:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:36:12,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 13:36:12,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:36:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:36:16,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:36:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:36:22,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:36:22,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989675049] [2022-03-20 13:36:22,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:36:22,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521507003] [2022-03-20 13:36:22,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521507003] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:36:22,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:36:22,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 45 [2022-03-20 13:36:24,787 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:36:24,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [462158939] [2022-03-20 13:36:24,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [462158939] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:36:24,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:36:24,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 13:36:24,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236087873] [2022-03-20 13:36:24,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:36:24,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 13:36:24,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:36:24,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 13:36:24,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2264, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 13:36:24,789 INFO L87 Difference]: Start difference. First operand 771 states and 888 transitions. Second operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:36:27,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:36:27,331 INFO L93 Difference]: Finished difference Result 786 states and 903 transitions. [2022-03-20 13:36:27,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 13:36:27,336 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-03-20 13:36:27,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:36:27,341 INFO L225 Difference]: With dead ends: 786 [2022-03-20 13:36:27,341 INFO L226 Difference]: Without dead ends: 774 [2022-03-20 13:36:27,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=200, Invalid=2350, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 13:36:27,348 INFO L913 BasicCegarLoop]: 120 mSDtfsCounter, 112 mSDsluCounter, 2598 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 2718 SdHoareTripleChecker+Invalid, 1501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 13:36:27,349 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 2718 Invalid, 1501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1498 Invalid, 0 Unknown, 2 Unchecked, 1.9s Time] [2022-03-20 13:36:27,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-03-20 13:36:27,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 772. [2022-03-20 13:36:27,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 655 states have (on average 1.1572519083969466) internal successors, (758), 727 states have internal predecessors, (758), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (83), 39 states have call predecessors, (83), 39 states have call successors, (83) [2022-03-20 13:36:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 882 transitions. [2022-03-20 13:36:27,810 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 882 transitions. Word has length 54 [2022-03-20 13:36:27,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:36:27,810 INFO L478 AbstractCegarLoop]: Abstraction has 772 states and 882 transitions. [2022-03-20 13:36:27,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:36:27,810 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 882 transitions. [2022-03-20 13:36:27,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 13:36:27,817 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:36:27,817 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:36:27,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-20 13:36:28,017 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-03-20 13:36:28,017 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:36:28,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:36:28,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1492920781, now seen corresponding path program 77 times [2022-03-20 13:36:28,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:36:28,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1312649351] [2022-03-20 13:36:28,080 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:36:28,080 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:36:28,080 INFO L85 PathProgramCache]: Analyzing trace with hash -173887858, now seen corresponding path program 1 times [2022-03-20 13:36:28,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:36:28,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298301947] [2022-03-20 13:36:28,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:36:28,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:36:28,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:36:28,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569111283] [2022-03-20 13:36:28,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:36:28,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:36:28,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:36:28,086 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:36:28,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-20 13:36:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:36:28,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 13:36:28,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:36:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 13:36:28,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:36:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 13:36:29,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:36:29,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298301947] [2022-03-20 13:36:29,202 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:36:29,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569111283] [2022-03-20 13:36:29,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569111283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:36:29,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:36:29,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 46 [2022-03-20 13:36:29,243 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:36:29,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1312649351] [2022-03-20 13:36:29,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1312649351] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:36:29,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:36:29,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 13:36:29,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346258304] [2022-03-20 13:36:29,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:36:29,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 13:36:29,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:36:29,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 13:36:29,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=2038, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 13:36:29,244 INFO L87 Difference]: Start difference. First operand 772 states and 882 transitions. Second operand has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:36:30,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:36:30,140 INFO L93 Difference]: Finished difference Result 790 states and 903 transitions. [2022-03-20 13:36:30,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 13:36:30,140 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-03-20 13:36:30,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:36:30,149 INFO L225 Difference]: With dead ends: 790 [2022-03-20 13:36:30,149 INFO L226 Difference]: Without dead ends: 784 [2022-03-20 13:36:30,157 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=2504, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 13:36:30,157 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:36:30,157 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 553 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:36:30,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-03-20 13:36:30,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 782. [2022-03-20 13:36:30,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 662 states have (on average 1.1586102719033233) internal successors, (767), 736 states have internal predecessors, (767), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (86), 40 states have call predecessors, (86), 40 states have call successors, (86) [2022-03-20 13:36:30,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 895 transitions. [2022-03-20 13:36:30,695 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 895 transitions. Word has length 55 [2022-03-20 13:36:30,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:36:30,695 INFO L478 AbstractCegarLoop]: Abstraction has 782 states and 895 transitions. [2022-03-20 13:36:30,695 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:36:30,696 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 895 transitions. [2022-03-20 13:36:30,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 13:36:30,703 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:36:30,703 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:36:30,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-20 13:36:30,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:36:30,904 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:36:30,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:36:30,904 INFO L85 PathProgramCache]: Analyzing trace with hash 250025658, now seen corresponding path program 78 times [2022-03-20 13:36:30,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:36:30,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1475948512] [2022-03-20 13:36:30,960 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:36:30,961 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:36:30,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1404976059, now seen corresponding path program 1 times [2022-03-20 13:36:30,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:36:30,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162656271] [2022-03-20 13:36:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:36:30,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:36:30,966 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:36:30,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763874419] [2022-03-20 13:36:30,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:36:30,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:36:30,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:36:30,967 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:36:30,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-20 13:36:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:36:31,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 13:36:31,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:36:31,222 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:36:50,903 WARN L232 SmtUtils]: Spent 17.80s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 13:36:53,814 WARN L855 $PredicateComparison]: unable to prove that (exists ((correct_version_~b~0 Int)) (and (not (< correct_version_~b~0 |c_correct_version_#in~n|)) (or (let ((.cse0 (+ (* |c_correct_version_#in~a| c_correct_version_~i~0) (* (- 1) correct_version_~b~0)))) (let ((.cse1 (div .cse0 |c_correct_version_#in~a|))) (and (= (mod .cse0 |c_correct_version_#in~a|) 0) (<= .cse1 0) (< .cse1 c_correct_version_~i~0) (forall ((v_it_84 Int)) (or (< (* |c_correct_version_#in~a| v_it_84) |c_correct_version_#in~n|) (not (<= (+ (div (+ (* |c_correct_version_#in~a| c_correct_version_~i~0) (* (- 1) correct_version_~b~0)) |c_correct_version_#in~a|) v_it_84 1) c_correct_version_~i~0)))) (< 0 |c_correct_version_#in~n|) (not (= |c_correct_version_#in~a| 0))))) (and (= correct_version_~b~0 0) (<= c_correct_version_~i~0 0))))) is different from true [2022-03-20 13:37:15,470 WARN L232 SmtUtils]: Spent 7.62s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 13:37:23,431 WARN L232 SmtUtils]: Spent 5.53s on a formula simplification. DAG size of input: 34 DAG size of output: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 13:38:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 38 refuted. 1 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 13:38:30,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:39:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 13:39:31,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:39:31,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162656271] [2022-03-20 13:39:31,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:39:31,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763874419] [2022-03-20 13:39:31,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763874419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:39:31,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:39:31,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2022-03-20 13:39:58,643 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:39:58,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1475948512] [2022-03-20 13:39:58,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1475948512] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:39:58,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:39:58,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 13:39:58,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934983519] [2022-03-20 13:39:58,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:39:58,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 13:39:58,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:39:58,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 13:39:58,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1869, Unknown=46, NotChecked=90, Total=2256 [2022-03-20 13:39:58,645 INFO L87 Difference]: Start difference. First operand 782 states and 895 transitions. Second operand has 27 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 26 states have internal predecessors, (40), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:40:08,454 WARN L232 SmtUtils]: Spent 8.62s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 13:40:10,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:40:10,329 INFO L93 Difference]: Finished difference Result 793 states and 905 transitions. [2022-03-20 13:40:10,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 13:40:10,330 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 26 states have internal predecessors, (40), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 55 [2022-03-20 13:40:10,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:40:10,335 INFO L225 Difference]: With dead ends: 793 [2022-03-20 13:40:10,335 INFO L226 Difference]: Without dead ends: 776 [2022-03-20 13:40:10,344 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 198.4s TimeCoverageRelationStatistics Valid=281, Invalid=2029, Unknown=46, NotChecked=94, Total=2450 [2022-03-20 13:40:10,344 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 51 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:40:10,344 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 1112 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 239 Invalid, 0 Unknown, 333 Unchecked, 1.2s Time] [2022-03-20 13:40:10,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-03-20 13:40:10,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 774. [2022-03-20 13:40:10,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 654 states have (on average 1.1590214067278288) internal successors, (758), 728 states have internal predecessors, (758), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2022-03-20 13:40:10,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 878 transitions. [2022-03-20 13:40:10,841 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 878 transitions. Word has length 55 [2022-03-20 13:40:10,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:40:10,841 INFO L478 AbstractCegarLoop]: Abstraction has 774 states and 878 transitions. [2022-03-20 13:40:10,841 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 26 states have internal predecessors, (40), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:40:10,842 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 878 transitions. [2022-03-20 13:40:10,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 13:40:10,849 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:40:10,849 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:40:10,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-20 13:40:11,049 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:40:11,049 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:40:11,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:40:11,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1734423830, now seen corresponding path program 79 times [2022-03-20 13:40:11,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:40:11,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [602514030] [2022-03-20 13:40:11,195 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:40:11,195 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:40:11,195 INFO L85 PathProgramCache]: Analyzing trace with hash -2052681685, now seen corresponding path program 1 times [2022-03-20 13:40:11,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:40:11,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949659893] [2022-03-20 13:40:11,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:40:11,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:40:11,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:40:11,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950635796] [2022-03-20 13:40:11,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:40:11,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:40:11,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:40:11,205 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:40:11,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-20 13:40:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:40:11,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 13:40:11,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:40:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 13:40:15,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:40:19,817 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 13:40:19,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:40:19,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949659893] [2022-03-20 13:40:19,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:40:19,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950635796] [2022-03-20 13:40:19,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950635796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:40:19,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:40:19,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 44 [2022-03-20 13:40:20,137 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:40:20,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [602514030] [2022-03-20 13:40:20,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [602514030] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:40:20,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:40:20,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 13:40:20,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427727505] [2022-03-20 13:40:20,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:40:20,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 13:40:20,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:40:20,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 13:40:20,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1868, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 13:40:20,138 INFO L87 Difference]: Start difference. First operand 774 states and 878 transitions. Second operand has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:40:26,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:40:26,035 INFO L93 Difference]: Finished difference Result 780 states and 883 transitions. [2022-03-20 13:40:26,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 13:40:26,035 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-03-20 13:40:26,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:40:26,039 INFO L225 Difference]: With dead ends: 780 [2022-03-20 13:40:26,039 INFO L226 Difference]: Without dead ends: 759 [2022-03-20 13:40:26,046 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 58 SyntacticMatches, 11 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=136, Invalid=2314, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 13:40:26,046 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 59 mSDsluCounter, 1995 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 2067 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:40:26,047 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 2067 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-03-20 13:40:26,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-03-20 13:40:26,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 759. [2022-03-20 13:40:26,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 642 states have (on average 1.158878504672897) internal successors, (744), 714 states have internal predecessors, (744), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (76), 39 states have call predecessors, (76), 39 states have call successors, (76) [2022-03-20 13:40:26,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 861 transitions. [2022-03-20 13:40:26,535 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 861 transitions. Word has length 55 [2022-03-20 13:40:26,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:40:26,536 INFO L478 AbstractCegarLoop]: Abstraction has 759 states and 861 transitions. [2022-03-20 13:40:26,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:40:26,536 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 861 transitions. [2022-03-20 13:40:26,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 13:40:26,543 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:40:26,543 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:40:26,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-20 13:40:26,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:40:26,743 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:40:26,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:40:26,744 INFO L85 PathProgramCache]: Analyzing trace with hash -402978195, now seen corresponding path program 80 times [2022-03-20 13:40:26,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:40:26,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1469518129] [2022-03-20 13:40:26,887 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:40:26,887 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:40:26,887 INFO L85 PathProgramCache]: Analyzing trace with hash 2100522990, now seen corresponding path program 1 times [2022-03-20 13:40:26,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:40:26,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652186156] [2022-03-20 13:40:26,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:40:26,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:40:26,892 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:40:26,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539552301] [2022-03-20 13:40:26,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:40:26,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:40:26,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:40:26,893 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:40:26,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-20 13:40:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:40:26,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 13:40:26,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:40:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 13:40:31,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:40:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 13:40:35,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:40:35,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652186156] [2022-03-20 13:40:35,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:40:35,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539552301] [2022-03-20 13:40:35,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539552301] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:40:35,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:40:35,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 42 [2022-03-20 13:40:36,101 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:40:36,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1469518129] [2022-03-20 13:40:36,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1469518129] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:40:36,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:40:36,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 13:40:36,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067254934] [2022-03-20 13:40:36,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:40:36,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 13:40:36,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:40:36,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 13:40:36,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1706, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 13:40:36,103 INFO L87 Difference]: Start difference. First operand 759 states and 861 transitions. Second operand has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 32 states have internal predecessors, (45), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:40:42,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:40:42,461 INFO L93 Difference]: Finished difference Result 765 states and 866 transitions. [2022-03-20 13:40:42,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 13:40:42,462 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 32 states have internal predecessors, (45), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-03-20 13:40:42,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:40:42,465 INFO L225 Difference]: With dead ends: 765 [2022-03-20 13:40:42,465 INFO L226 Difference]: Without dead ends: 746 [2022-03-20 13:40:42,472 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 12 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=124, Invalid=2132, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 13:40:42,472 INFO L913 BasicCegarLoop]: 108 mSDtfsCounter, 95 mSDsluCounter, 2775 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 2883 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:40:42,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 2883 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-03-20 13:40:42,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-03-20 13:40:42,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 746. [2022-03-20 13:40:42,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 632 states have (on average 1.1582278481012658) internal successors, (732), 702 states have internal predecessors, (732), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (74), 38 states have call predecessors, (74), 38 states have call successors, (74) [2022-03-20 13:40:42,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 846 transitions. [2022-03-20 13:40:42,997 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 846 transitions. Word has length 55 [2022-03-20 13:40:42,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:40:42,997 INFO L478 AbstractCegarLoop]: Abstraction has 746 states and 846 transitions. [2022-03-20 13:40:42,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 32 states have internal predecessors, (45), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:40:42,997 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 846 transitions. [2022-03-20 13:40:43,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 13:40:43,004 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:40:43,004 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:40:43,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-20 13:40:43,204 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:40:43,204 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:40:43,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:40:43,205 INFO L85 PathProgramCache]: Analyzing trace with hash -579740214, now seen corresponding path program 81 times [2022-03-20 13:40:43,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:40:43,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [537309181] [2022-03-20 13:40:43,359 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:40:43,359 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:40:43,359 INFO L85 PathProgramCache]: Analyzing trace with hash 450552715, now seen corresponding path program 1 times [2022-03-20 13:40:43,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:40:43,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748484256] [2022-03-20 13:40:43,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:40:43,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:40:43,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:40:43,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614546953] [2022-03-20 13:40:43,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:40:43,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:40:43,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:40:43,365 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:40:43,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-20 13:40:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:40:43,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 13:40:43,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:40:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:40:48,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:40:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:40:52,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:40:52,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748484256] [2022-03-20 13:40:52,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:40:52,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614546953] [2022-03-20 13:40:52,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614546953] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:40:52,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:40:52,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 40 [2022-03-20 13:40:52,583 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:40:52,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [537309181] [2022-03-20 13:40:52,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [537309181] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:40:52,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:40:52,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 13:40:52,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082853229] [2022-03-20 13:40:52,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:40:52,584 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 13:40:52,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:40:52,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 13:40:52,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1552, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 13:40:52,584 INFO L87 Difference]: Start difference. First operand 746 states and 846 transitions. Second operand has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 34 states have internal predecessors, (47), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:41:01,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:41:01,417 INFO L93 Difference]: Finished difference Result 857 states and 974 transitions. [2022-03-20 13:41:01,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 13:41:01,417 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 34 states have internal predecessors, (47), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-03-20 13:41:01,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:41:01,425 INFO L225 Difference]: With dead ends: 857 [2022-03-20 13:41:01,425 INFO L226 Difference]: Without dead ends: 851 [2022-03-20 13:41:01,439 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 58 SyntacticMatches, 15 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=112, Invalid=1958, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 13:41:01,439 INFO L913 BasicCegarLoop]: 141 mSDtfsCounter, 132 mSDsluCounter, 4696 mSDsCounter, 0 mSdLazyCounter, 1914 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 4837 SdHoareTripleChecker+Invalid, 1919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:41:01,439 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 4837 Invalid, 1919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1914 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-03-20 13:41:01,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-03-20 13:41:01,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 762. [2022-03-20 13:41:01,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 645 states have (on average 1.15968992248062) internal successors, (748), 717 states have internal predecessors, (748), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (77), 39 states have call predecessors, (77), 39 states have call successors, (77) [2022-03-20 13:41:01,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 866 transitions. [2022-03-20 13:41:01,963 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 866 transitions. Word has length 55 [2022-03-20 13:41:01,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:41:01,964 INFO L478 AbstractCegarLoop]: Abstraction has 762 states and 866 transitions. [2022-03-20 13:41:01,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 34 states have internal predecessors, (47), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:41:01,964 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 866 transitions. [2022-03-20 13:41:01,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 13:41:01,970 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:01,971 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:41:01,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-20 13:41:02,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:02,171 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:02,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:02,171 INFO L85 PathProgramCache]: Analyzing trace with hash 385040813, now seen corresponding path program 82 times [2022-03-20 13:41:02,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:02,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [321977681] [2022-03-20 13:41:02,329 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:41:02,330 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:41:02,330 INFO L85 PathProgramCache]: Analyzing trace with hash -460432436, now seen corresponding path program 1 times [2022-03-20 13:41:02,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:02,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524960772] [2022-03-20 13:41:02,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:02,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:02,335 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:02,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035582786] [2022-03-20 13:41:02,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:02,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:02,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:02,336 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:41:02,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-20 13:41:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:41:02,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 13:41:02,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:41:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 13:41:03,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:41:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 13:41:05,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:41:05,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524960772] [2022-03-20 13:41:05,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:41:05,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035582786] [2022-03-20 13:41:05,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035582786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:41:05,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:41:05,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2022-03-20 13:41:05,569 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:41:05,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [321977681] [2022-03-20 13:41:05,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [321977681] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:05,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:05,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 13:41:05,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787516788] [2022-03-20 13:41:05,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:41:05,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 13:41:05,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:05,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 13:41:05,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-03-20 13:41:05,570 INFO L87 Difference]: Start difference. First operand 762 states and 866 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 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 13:41:10,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:41:10,302 INFO L93 Difference]: Finished difference Result 940 states and 1075 transitions. [2022-03-20 13:41:10,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 13:41:10,306 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 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 56 [2022-03-20 13:41:10,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:41:10,311 INFO L225 Difference]: With dead ends: 940 [2022-03-20 13:41:10,311 INFO L226 Difference]: Without dead ends: 894 [2022-03-20 13:41:10,322 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=756, Invalid=2106, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 13:41:10,322 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 120 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:41:10,323 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 357 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 13:41:10,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-03-20 13:41:10,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 864. [2022-03-20 13:41:10,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 747 states have (on average 1.1526104417670682) internal successors, (861), 819 states have internal predecessors, (861), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (77), 39 states have call predecessors, (77), 39 states have call successors, (77) [2022-03-20 13:41:10,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 979 transitions. [2022-03-20 13:41:10,887 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 979 transitions. Word has length 56 [2022-03-20 13:41:10,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:41:10,887 INFO L478 AbstractCegarLoop]: Abstraction has 864 states and 979 transitions. [2022-03-20 13:41:10,888 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 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 13:41:10,888 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 979 transitions. [2022-03-20 13:41:10,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 13:41:10,896 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:10,896 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:41:10,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-20 13:41:11,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-20 13:41:11,099 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:11,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1868652946, now seen corresponding path program 83 times [2022-03-20 13:41:11,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:11,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1206826620] [2022-03-20 13:41:11,273 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:41:11,273 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:41:11,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1138941875, now seen corresponding path program 1 times [2022-03-20 13:41:11,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:11,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958188376] [2022-03-20 13:41:11,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:11,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:11,278 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:11,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610482675] [2022-03-20 13:41:11,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:11,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:11,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:11,279 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:41:11,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-20 13:41:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:41:11,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 13:41:11,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:41:11,684 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:41:28,935 WARN L232 SmtUtils]: Spent 16.67s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 13:41:31,511 WARN L833 $PredicateComparison]: unable to prove that (and (= c_correct_version_~j~0 0) (exists ((correct_version_~b~0 Int)) (and (not (< correct_version_~b~0 |c_correct_version_#in~n|)) (or (let ((.cse0 (+ (* |c_correct_version_#in~a| c_correct_version_~i~0) (* (- 1) correct_version_~b~0)))) (let ((.cse1 (div .cse0 |c_correct_version_#in~a|))) (and (= (mod .cse0 |c_correct_version_#in~a|) 0) (<= .cse1 0) (< .cse1 c_correct_version_~i~0) (forall ((v_it_89 Int)) (or (not (<= (+ (div (+ (* |c_correct_version_#in~a| c_correct_version_~i~0) (* (- 1) correct_version_~b~0)) |c_correct_version_#in~a|) v_it_89 1) c_correct_version_~i~0)) (< (* |c_correct_version_#in~a| v_it_89) |c_correct_version_#in~n|))) (< 0 |c_correct_version_#in~n|) (not (= |c_correct_version_#in~a| 0))))) (and (= correct_version_~b~0 0) (<= c_correct_version_~i~0 0)))))) is different from false [2022-03-20 13:41:35,923 WARN L833 $PredicateComparison]: unable to prove that (and (= (+ (- 1) c_correct_version_~j~0) 0) (exists ((correct_version_~b~0 Int)) (and (not (< correct_version_~b~0 |c_correct_version_#in~n|)) (or (let ((.cse0 (+ (* |c_correct_version_#in~a| c_correct_version_~i~0) (* (- 1) correct_version_~b~0)))) (let ((.cse1 (div .cse0 |c_correct_version_#in~a|))) (and (= (mod .cse0 |c_correct_version_#in~a|) 0) (<= .cse1 0) (< .cse1 c_correct_version_~i~0) (forall ((v_it_89 Int)) (or (not (<= (+ (div (+ (* |c_correct_version_#in~a| c_correct_version_~i~0) (* (- 1) correct_version_~b~0)) |c_correct_version_#in~a|) v_it_89 1) c_correct_version_~i~0)) (< (* |c_correct_version_#in~a| v_it_89) |c_correct_version_#in~n|))) (< 0 |c_correct_version_#in~n|) (not (= |c_correct_version_#in~a| 0))))) (and (= correct_version_~b~0 0) (<= c_correct_version_~i~0 0)))))) is different from false [2022-03-20 13:41:49,108 WARN L833 $PredicateComparison]: unable to prove that (and (<= 1 c_correct_version_~x~0) (= (+ (- 1) c_correct_version_~j~0) 0) (= c_correct_version_~y~0 c_correct_version_~j~0) (exists ((correct_version_~b~0 Int)) (and (not (< correct_version_~b~0 |c_correct_version_#in~n|)) (or (let ((.cse0 (+ (* |c_correct_version_#in~a| c_correct_version_~i~0) (* (- 1) correct_version_~b~0)))) (let ((.cse1 (div .cse0 |c_correct_version_#in~a|))) (and (= (mod .cse0 |c_correct_version_#in~a|) 0) (<= .cse1 0) (< .cse1 c_correct_version_~i~0) (forall ((v_it_89 Int)) (or (not (<= (+ (div (+ (* |c_correct_version_#in~a| c_correct_version_~i~0) (* (- 1) correct_version_~b~0)) |c_correct_version_#in~a|) v_it_89 1) c_correct_version_~i~0)) (< (* |c_correct_version_#in~a| v_it_89) |c_correct_version_#in~n|))) (< 0 |c_correct_version_#in~n|) (not (= |c_correct_version_#in~a| 0))))) (and (= correct_version_~b~0 0) (<= c_correct_version_~i~0 0)))))) is different from false [2022-03-20 13:42:11,310 WARN L232 SmtUtils]: Spent 12.11s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 13:42:27,432 WARN L232 SmtUtils]: Spent 5.61s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 13:42:52,158 WARN L833 $PredicateComparison]: unable to prove that (and (= (* c_correct_version_~j~0 4) (+ c_correct_version_~y~0 (* (- 2) c_correct_version_~j~0))) (<= 6 c_correct_version_~x~0) (= (+ (- 1) c_correct_version_~j~0) 0) (exists ((correct_version_~b~0 Int)) (and (not (< correct_version_~b~0 |c_correct_version_#in~n|)) (or (let ((.cse0 (+ (* |c_correct_version_#in~a| c_correct_version_~i~0) (* (- 1) correct_version_~b~0)))) (let ((.cse1 (div .cse0 |c_correct_version_#in~a|))) (and (= (mod .cse0 |c_correct_version_#in~a|) 0) (<= .cse1 0) (< .cse1 c_correct_version_~i~0) (forall ((v_it_89 Int)) (or (not (<= (+ (div (+ (* |c_correct_version_#in~a| c_correct_version_~i~0) (* (- 1) correct_version_~b~0)) |c_correct_version_#in~a|) v_it_89 1) c_correct_version_~i~0)) (< (* |c_correct_version_#in~a| v_it_89) |c_correct_version_#in~n|))) (< 0 |c_correct_version_#in~n|) (not (= |c_correct_version_#in~a| 0))))) (and (= correct_version_~b~0 0) (<= c_correct_version_~i~0 0)))))) is different from false