/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench/hard2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 21:48:49,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 21:48:49,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 21:48:49,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 21:48:49,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 21:48:49,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 21:48:49,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 21:48:49,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 21:48:49,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 21:48:49,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 21:48:49,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 21:48:49,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 21:48:49,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 21:48:49,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 21:48:49,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 21:48:49,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 21:48:49,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 21:48:49,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 21:48:49,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 21:48:49,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 21:48:49,444 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 21:48:49,466 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 21:48:49,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 21:48:49,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 21:48:49,467 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 21:48:49,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 21:48:49,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 21:48:49,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 21:48:49,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 21:48:49,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 21:48:49,467 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 21:48:49,468 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 21:48:49,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 21:48:49,468 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 21:48:49,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 21:48:49,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 21:48:49,468 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 21:48:49,468 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 21:48:49,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 21:48:49,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 21:48:49,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 21:48:49,469 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 21:48:49,469 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 21:48:49,469 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 21:48:49,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 21:48:49,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 21:48:49,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 21:48:49,672 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 21:48:49,672 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 21:48:49,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/hard2.c [2022-02-14 21:48:49,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/542545997/181abd328fa84e08882b2930b0dd1c89/FLAG42f16c0e0 [2022-02-14 21:48:50,049 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 21:48:50,049 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard2.c [2022-02-14 21:48:50,053 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/542545997/181abd328fa84e08882b2930b0dd1c89/FLAG42f16c0e0 [2022-02-14 21:48:50,061 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/542545997/181abd328fa84e08882b2930b0dd1c89 [2022-02-14 21:48:50,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 21:48:50,063 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 21:48:50,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 21:48:50,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 21:48:50,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 21:48:50,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:48:50" (1/1) ... [2022-02-14 21:48:50,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d917695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:48:50, skipping insertion in model container [2022-02-14 21:48:50,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:48:50" (1/1) ... [2022-02-14 21:48:50,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 21:48:50,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 21:48:50,199 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard2.c[526,539] [2022-02-14 21:48:50,208 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 21:48:50,223 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 21:48:50,245 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard2.c[526,539] [2022-02-14 21:48:50,260 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 21:48:50,268 INFO L208 MainTranslator]: Completed translation [2022-02-14 21:48:50,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:48:50 WrapperNode [2022-02-14 21:48:50,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 21:48:50,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 21:48:50,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 21:48:50,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 21:48:50,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:48:50" (1/1) ... [2022-02-14 21:48:50,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:48:50" (1/1) ... [2022-02-14 21:48:50,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:48:50" (1/1) ... [2022-02-14 21:48:50,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:48:50" (1/1) ... [2022-02-14 21:48:50,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:48:50" (1/1) ... [2022-02-14 21:48:50,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:48:50" (1/1) ... [2022-02-14 21:48:50,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:48:50" (1/1) ... [2022-02-14 21:48:50,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 21:48:50,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 21:48:50,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 21:48:50,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 21:48:50,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:48:50" (1/1) ... [2022-02-14 21:48:50,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 21:48:50,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:48:50,360 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) [2022-02-14 21:48:50,387 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 [2022-02-14 21:48:50,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 21:48:50,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 21:48:50,409 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 21:48:50,409 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 21:48:50,409 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 21:48:50,409 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 21:48:50,409 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 21:48:50,409 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 21:48:50,409 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 21:48:50,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 21:48:50,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 21:48:50,410 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 21:48:50,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 21:48:50,410 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 21:48:50,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 21:48:50,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 21:48:50,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 21:48:50,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 21:48:50,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 21:48:50,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 21:48:50,448 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 21:48:50,449 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 21:48:50,533 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 21:48:50,537 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 21:48:50,537 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-14 21:48:50,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:48:50 BoogieIcfgContainer [2022-02-14 21:48:50,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 21:48:50,539 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 21:48:50,539 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 21:48:50,540 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 21:48:50,542 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:48:50" (1/1) ... [2022-02-14 21:48:50,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 09:48:50 BasicIcfg [2022-02-14 21:48:50,551 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 21:48:50,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 21:48:50,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 21:48:50,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 21:48:50,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 09:48:50" (1/4) ... [2022-02-14 21:48:50,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4d699e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:48:50, skipping insertion in model container [2022-02-14 21:48:50,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:48:50" (2/4) ... [2022-02-14 21:48:50,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4d699e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:48:50, skipping insertion in model container [2022-02-14 21:48:50,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:48:50" (3/4) ... [2022-02-14 21:48:50,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4d699e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 09:48:50, skipping insertion in model container [2022-02-14 21:48:50,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 09:48:50" (4/4) ... [2022-02-14 21:48:50,555 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2.cJordan [2022-02-14 21:48:50,558 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 21:48:50,558 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 21:48:50,582 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 21:48:50,586 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 21:48:50,586 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 21:48:50,594 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 21:48:50,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-14 21:48:50,598 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:48:50,598 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:48:50,599 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:48:50,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:48:50,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1059151250, now seen corresponding path program 1 times [2022-02-14 21:48:50,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:48:50,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652448764] [2022-02-14 21:48:50,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:48:50,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:48:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:50,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:48:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:50,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:48:50,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:48:50,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652448764] [2022-02-14 21:48:50,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652448764] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:48:50,795 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:48:50,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 21:48:50,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819422390] [2022-02-14 21:48:50,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:48:50,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 21:48:50,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:48:50,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 21:48:50,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 21:48:50,818 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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) [2022-02-14 21:48:50,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:48:50,987 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2022-02-14 21:48:50,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 21:48:50,989 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 [2022-02-14 21:48:50,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:48:50,993 INFO L225 Difference]: With dead ends: 43 [2022-02-14 21:48:50,994 INFO L226 Difference]: Without dead ends: 35 [2022-02-14 21:48:50,995 INFO L932 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 [2022-02-14 21:48:50,997 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 39 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:48:50,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 48 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:48:51,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-14 21:48:51,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2022-02-14 21:48:51,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 21:48:51,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-02-14 21:48:51,023 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 11 [2022-02-14 21:48:51,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:48:51,023 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-02-14 21:48:51,024 INFO L471 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) [2022-02-14 21:48:51,024 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-02-14 21:48:51,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-14 21:48:51,025 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:48:51,025 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:48:51,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 21:48:51,026 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:48:51,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:48:51,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2043934920, now seen corresponding path program 1 times [2022-02-14 21:48:51,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:48:51,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296985046] [2022-02-14 21:48:51,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:48:51,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:48:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:51,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:48:51,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:51,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-14 21:48:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:48:51,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:48:51,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296985046] [2022-02-14 21:48:51,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296985046] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:48:51,128 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:48:51,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 21:48:51,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923600893] [2022-02-14 21:48:51,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:48:51,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 21:48:51,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:48:51,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 21:48:51,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 21:48:51,130 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 21:48:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:48:51,257 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-02-14 21:48:51,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 21:48:51,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-02-14 21:48:51,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:48:51,259 INFO L225 Difference]: With dead ends: 39 [2022-02-14 21:48:51,259 INFO L226 Difference]: Without dead ends: 39 [2022-02-14 21:48:51,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 21:48:51,260 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:48:51,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 40 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:48:51,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-14 21:48:51,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2022-02-14 21:48:51,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 21:48:51,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-02-14 21:48:51,265 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 16 [2022-02-14 21:48:51,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:48:51,268 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-02-14 21:48:51,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 21:48:51,269 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-02-14 21:48:51,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-14 21:48:51,270 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:48:51,270 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:48:51,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 21:48:51,270 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:48:51,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:48:51,270 INFO L85 PathProgramCache]: Analyzing trace with hash 106953131, now seen corresponding path program 1 times [2022-02-14 21:48:51,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:48:51,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321873278] [2022-02-14 21:48:51,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:48:51,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:48:51,293 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 21:48:51,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369409814] [2022-02-14 21:48:51,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:48:51,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:48:51,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:48:51,295 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) [2022-02-14 21:48:51,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 21:48:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:51,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 21:48:51,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:48:51,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 21:48:51,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 21:48:51,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:48:51,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321873278] [2022-02-14 21:48:51,516 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 21:48:51,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369409814] [2022-02-14 21:48:51,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369409814] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:48:51,516 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:48:51,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 21:48:51,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503862494] [2022-02-14 21:48:51,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:48:51,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 21:48:51,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:48:51,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 21:48:51,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 21:48:51,518 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 21:48:51,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:48:51,573 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2022-02-14 21:48:51,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 21:48:51,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-02-14 21:48:51,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:48:51,575 INFO L225 Difference]: With dead ends: 47 [2022-02-14 21:48:51,575 INFO L226 Difference]: Without dead ends: 46 [2022-02-14 21:48:51,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 21:48:51,576 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:48:51,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 115 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:48:51,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-02-14 21:48:51,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-02-14 21:48:51,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 21:48:51,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-02-14 21:48:51,581 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 21 [2022-02-14 21:48:51,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:48:51,581 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-02-14 21:48:51,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 21:48:51,581 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-02-14 21:48:51,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-14 21:48:51,582 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:48:51,582 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:48:51,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 21:48:51,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:48:51,822 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:48:51,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:48:51,823 INFO L85 PathProgramCache]: Analyzing trace with hash 606156080, now seen corresponding path program 1 times [2022-02-14 21:48:51,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:48:51,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510015509] [2022-02-14 21:48:51,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:48:51,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:48:51,829 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 21:48:51,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907946603] [2022-02-14 21:48:51,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:48:51,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:48:51,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:48:51,831 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) [2022-02-14 21:48:51,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 21:48:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:51,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 21:48:51,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:48:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 21:48:51,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 21:48:51,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:48:51,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510015509] [2022-02-14 21:48:51,943 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 21:48:51,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907946603] [2022-02-14 21:48:51,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907946603] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:48:51,944 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:48:51,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 21:48:51,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351966832] [2022-02-14 21:48:51,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:48:51,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 21:48:51,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:48:51,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 21:48:51,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 21:48:51,945 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 21:48:51,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:48:51,979 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-02-14 21:48:51,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 21:48:51,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-02-14 21:48:51,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:48:51,981 INFO L225 Difference]: With dead ends: 57 [2022-02-14 21:48:51,981 INFO L226 Difference]: Without dead ends: 52 [2022-02-14 21:48:51,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 21:48:51,982 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:48:51,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 89 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:48:51,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-14 21:48:51,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-02-14 21:48:51,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 21:48:51,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-02-14 21:48:51,987 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 28 [2022-02-14 21:48:51,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:48:51,988 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-02-14 21:48:51,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 21:48:51,988 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-02-14 21:48:51,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-14 21:48:51,989 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:48:51,989 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:48:52,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 21:48:52,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-14 21:48:52,207 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:48:52,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:48:52,207 INFO L85 PathProgramCache]: Analyzing trace with hash 312970699, now seen corresponding path program 1 times [2022-02-14 21:48:52,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:48:52,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871886547] [2022-02-14 21:48:52,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:48:52,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:48:52,219 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 21:48:52,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2103092016] [2022-02-14 21:48:52,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:48:52,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:48:52,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:48:52,221 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) [2022-02-14 21:48:52,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 21:48:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:52,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 21:48:52,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:48:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 21:48:52,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:48:52,504 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-02-14 21:48:52,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:48:52,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871886547] [2022-02-14 21:48:52,505 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 21:48:52,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103092016] [2022-02-14 21:48:52,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103092016] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 21:48:52,505 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 21:48:52,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-02-14 21:48:52,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227747786] [2022-02-14 21:48:52,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:48:52,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 21:48:52,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:48:52,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 21:48:52,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-14 21:48:52,506 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 21:48:52,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:48:52,554 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2022-02-14 21:48:52,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 21:48:52,554 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2022-02-14 21:48:52,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:48:52,556 INFO L225 Difference]: With dead ends: 61 [2022-02-14 21:48:52,556 INFO L226 Difference]: Without dead ends: 61 [2022-02-14 21:48:52,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-14 21:48:52,557 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:48:52,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 99 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:48:52,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-02-14 21:48:52,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2022-02-14 21:48:52,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 36 states have internal predecessors, (39), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 21:48:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-02-14 21:48:52,562 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 38 [2022-02-14 21:48:52,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:48:52,562 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-02-14 21:48:52,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 21:48:52,562 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-02-14 21:48:52,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-14 21:48:52,563 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:48:52,563 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:48:52,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 21:48:52,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:48:52,771 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:48:52,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:48:52,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1500982750, now seen corresponding path program 1 times [2022-02-14 21:48:52,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:48:52,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594249187] [2022-02-14 21:48:52,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:48:52,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:48:52,779 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 21:48:52,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008326275] [2022-02-14 21:48:52,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:48:52,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:48:52,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:48:52,780 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) [2022-02-14 21:48:52,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 21:48:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:52,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-14 21:48:52,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:48:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 21:48:53,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:48:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 21:48:53,813 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:48:53,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594249187] [2022-02-14 21:48:53,813 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 21:48:53,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008326275] [2022-02-14 21:48:53,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008326275] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:48:53,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 21:48:53,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-02-14 21:48:53,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593824853] [2022-02-14 21:48:53,814 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 21:48:53,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 21:48:53,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:48:53,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 21:48:53,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-14 21:48:53,815 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-02-14 21:48:56,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:48:56,369 INFO L93 Difference]: Finished difference Result 125 states and 170 transitions. [2022-02-14 21:48:56,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 21:48:56,370 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 58 [2022-02-14 21:48:56,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:48:56,371 INFO L225 Difference]: With dead ends: 125 [2022-02-14 21:48:56,371 INFO L226 Difference]: Without dead ends: 119 [2022-02-14 21:48:56,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-02-14 21:48:56,372 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 37 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-14 21:48:56,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 229 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-14 21:48:56,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-14 21:48:56,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 107. [2022-02-14 21:48:56,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 67 states have internal predecessors, (78), 32 states have call successors, (32), 12 states have call predecessors, (32), 11 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 21:48:56,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 140 transitions. [2022-02-14 21:48:56,388 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 140 transitions. Word has length 58 [2022-02-14 21:48:56,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:48:56,389 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 140 transitions. [2022-02-14 21:48:56,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-02-14 21:48:56,389 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 140 transitions. [2022-02-14 21:48:56,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-14 21:48:56,390 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:48:56,390 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:48:56,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 21:48:56,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:48:56,592 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:48:56,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:48:56,592 INFO L85 PathProgramCache]: Analyzing trace with hash -781577916, now seen corresponding path program 1 times [2022-02-14 21:48:56,593 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:48:56,593 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296647226] [2022-02-14 21:48:56,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:48:56,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:48:56,606 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 21:48:56,606 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122297586] [2022-02-14 21:48:56,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:48:56,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:48:56,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:48:56,613 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) [2022-02-14 21:48:56,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 21:48:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:56,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-14 21:48:56,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:48:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-02-14 21:48:57,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:48:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-02-14 21:48:57,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:48:57,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296647226] [2022-02-14 21:48:57,234 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 21:48:57,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122297586] [2022-02-14 21:48:57,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122297586] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:48:57,238 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 21:48:57,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-02-14 21:48:57,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81710678] [2022-02-14 21:48:57,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 21:48:57,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-14 21:48:57,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:48:57,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-14 21:48:57,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-02-14 21:48:57,242 INFO L87 Difference]: Start difference. First operand 107 states and 140 transitions. Second operand has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-02-14 21:48:57,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:48:57,466 INFO L93 Difference]: Finished difference Result 128 states and 159 transitions. [2022-02-14 21:48:57,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-14 21:48:57,466 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 69 [2022-02-14 21:48:57,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:48:57,467 INFO L225 Difference]: With dead ends: 128 [2022-02-14 21:48:57,467 INFO L226 Difference]: Without dead ends: 109 [2022-02-14 21:48:57,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-02-14 21:48:57,468 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 41 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 21:48:57,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 126 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 21:48:57,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-02-14 21:48:57,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 95. [2022-02-14 21:48:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 60 states have internal predecessors, (67), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-14 21:48:57,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2022-02-14 21:48:57,475 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 69 [2022-02-14 21:48:57,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:48:57,475 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2022-02-14 21:48:57,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-02-14 21:48:57,475 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2022-02-14 21:48:57,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-14 21:48:57,476 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:48:57,476 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:48:57,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 21:48:57,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:48:57,689 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:48:57,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:48:57,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1979995209, now seen corresponding path program 1 times [2022-02-14 21:48:57,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:48:57,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512679362] [2022-02-14 21:48:57,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:48:57,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:48:57,697 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 21:48:57,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [900342030] [2022-02-14 21:48:57,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:48:57,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:48:57,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:48:57,698 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) [2022-02-14 21:48:57,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 21:48:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:57,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-14 21:48:57,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:48:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-02-14 21:48:57,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 21:48:57,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:48:57,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512679362] [2022-02-14 21:48:57,867 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 21:48:57,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900342030] [2022-02-14 21:48:57,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900342030] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:48:57,867 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:48:57,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 21:48:57,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406216114] [2022-02-14 21:48:57,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:48:57,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 21:48:57,868 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:48:57,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 21:48:57,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-14 21:48:57,868 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-02-14 21:48:57,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:48:57,898 INFO L93 Difference]: Finished difference Result 97 states and 116 transitions. [2022-02-14 21:48:57,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 21:48:57,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 78 [2022-02-14 21:48:57,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:48:57,900 INFO L225 Difference]: With dead ends: 97 [2022-02-14 21:48:57,900 INFO L226 Difference]: Without dead ends: 97 [2022-02-14 21:48:57,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-14 21:48:57,900 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 14 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:48:57,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 99 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:48:57,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-02-14 21:48:57,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-02-14 21:48:57,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 59 states have (on average 1.152542372881356) internal successors, (68), 60 states have internal predecessors, (68), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-14 21:48:57,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 116 transitions. [2022-02-14 21:48:57,905 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 116 transitions. Word has length 78 [2022-02-14 21:48:57,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:48:57,905 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 116 transitions. [2022-02-14 21:48:57,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-02-14 21:48:57,905 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 116 transitions. [2022-02-14 21:48:57,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-14 21:48:57,906 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:48:57,906 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:48:57,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 21:48:58,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:48:58,122 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:48:58,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:48:58,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1650636816, now seen corresponding path program 2 times [2022-02-14 21:48:58,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:48:58,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623138933] [2022-02-14 21:48:58,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:48:58,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:48:58,129 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 21:48:58,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261478850] [2022-02-14 21:48:58,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 21:48:58,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:48:58,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:48:58,131 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) [2022-02-14 21:48:58,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 21:48:58,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 21:48:58,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:48:58,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-14 21:48:58,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:48:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 21:48:58,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:49:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 19 refuted. 5 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 21:49:19,872 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:49:19,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623138933] [2022-02-14 21:49:19,872 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 21:49:19,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261478850] [2022-02-14 21:49:19,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261478850] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:49:19,872 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 21:49:19,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-02-14 21:49:19,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222921148] [2022-02-14 21:49:19,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 21:49:19,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-14 21:49:19,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:49:19,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-14 21:49:19,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=179, Unknown=1, NotChecked=0, Total=240 [2022-02-14 21:49:19,873 INFO L87 Difference]: Start difference. First operand 97 states and 116 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-02-14 21:49:31,197 WARN L228 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 81 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 21:49:34,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:49:34,004 INFO L93 Difference]: Finished difference Result 187 states and 252 transitions. [2022-02-14 21:49:34,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-14 21:49:34,005 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 88 [2022-02-14 21:49:34,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:49:34,006 INFO L225 Difference]: With dead ends: 187 [2022-02-14 21:49:34,006 INFO L226 Difference]: Without dead ends: 171 [2022-02-14 21:49:34,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=114, Invalid=305, Unknown=1, NotChecked=0, Total=420 [2022-02-14 21:49:34,007 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 90 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-02-14 21:49:34,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 422 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-02-14 21:49:34,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-02-14 21:49:34,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2022-02-14 21:49:34,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 96 states have (on average 1.21875) internal successors, (117), 100 states have internal predecessors, (117), 48 states have call successors, (48), 16 states have call predecessors, (48), 15 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-14 21:49:34,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 211 transitions. [2022-02-14 21:49:34,015 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 211 transitions. Word has length 88 [2022-02-14 21:49:34,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:49:34,015 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 211 transitions. [2022-02-14 21:49:34,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-02-14 21:49:34,016 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 211 transitions. [2022-02-14 21:49:34,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-02-14 21:49:34,017 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:49:34,017 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:49:34,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-14 21:49:34,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:49:34,218 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:49:34,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:49:34,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1538097783, now seen corresponding path program 1 times [2022-02-14 21:49:34,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:49:34,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050465115] [2022-02-14 21:49:34,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:49:34,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:49:34,224 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 21:49:34,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940729776] [2022-02-14 21:49:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:49:34,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:49:34,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:49:34,227 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 21:49:34,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-14 21:49:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:49:34,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-14 21:49:34,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:49:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 21:49:34,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:49:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 21:49:35,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:49:35,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050465115] [2022-02-14 21:49:35,162 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 21:49:35,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940729776] [2022-02-14 21:49:35,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940729776] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:49:35,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 21:49:35,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-02-14 21:49:35,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176532780] [2022-02-14 21:49:35,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 21:49:35,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 21:49:35,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:49:35,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 21:49:35,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-02-14 21:49:35,164 INFO L87 Difference]: Start difference. First operand 160 states and 211 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-02-14 21:49:35,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:49:35,367 INFO L93 Difference]: Finished difference Result 174 states and 231 transitions. [2022-02-14 21:49:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 21:49:35,368 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) Word has length 104 [2022-02-14 21:49:35,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:49:35,369 INFO L225 Difference]: With dead ends: 174 [2022-02-14 21:49:35,369 INFO L226 Difference]: Without dead ends: 168 [2022-02-14 21:49:35,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 195 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-02-14 21:49:35,369 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 7 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 21:49:35,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 309 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 21:49:35,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-02-14 21:49:35,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-02-14 21:49:35,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 100 states have (on average 1.21) internal successors, (121), 104 states have internal predecessors, (121), 52 states have call successors, (52), 16 states have call predecessors, (52), 15 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2022-02-14 21:49:35,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 223 transitions. [2022-02-14 21:49:35,380 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 223 transitions. Word has length 104 [2022-02-14 21:49:35,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:49:35,380 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 223 transitions. [2022-02-14 21:49:35,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-02-14 21:49:35,381 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 223 transitions. [2022-02-14 21:49:35,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-02-14 21:49:35,382 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:49:35,382 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:49:35,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-14 21:49:35,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-14 21:49:35,584 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:49:35,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:49:35,585 INFO L85 PathProgramCache]: Analyzing trace with hash -191386235, now seen corresponding path program 2 times [2022-02-14 21:49:35,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:49:35,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137283853] [2022-02-14 21:49:35,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:49:35,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:49:35,591 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 21:49:35,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061487401] [2022-02-14 21:49:35,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 21:49:35,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:49:35,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:49:35,592 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) [2022-02-14 21:49:35,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-14 21:49:35,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 21:49:35,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:49:35,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-14 21:49:35,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:49:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 102 proven. 42 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-02-14 21:49:35,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:49:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-02-14 21:49:36,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:49:36,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137283853] [2022-02-14 21:49:36,037 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 21:49:36,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061487401] [2022-02-14 21:49:36,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061487401] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:49:36,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 21:49:36,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-02-14 21:49:36,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065491747] [2022-02-14 21:49:36,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 21:49:36,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 21:49:36,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:49:36,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 21:49:36,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-14 21:49:36,041 INFO L87 Difference]: Start difference. First operand 168 states and 223 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-02-14 21:49:36,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:49:36,096 INFO L93 Difference]: Finished difference Result 153 states and 194 transitions. [2022-02-14 21:49:36,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 21:49:36,097 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) Word has length 117 [2022-02-14 21:49:36,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:49:36,100 INFO L225 Difference]: With dead ends: 153 [2022-02-14 21:49:36,100 INFO L226 Difference]: Without dead ends: 130 [2022-02-14 21:49:36,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 223 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-14 21:49:36,101 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 3 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:49:36,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 247 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:49:36,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-02-14 21:49:36,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-02-14 21:49:36,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 82 states have internal predecessors, (91), 36 states have call successors, (36), 16 states have call predecessors, (36), 15 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 21:49:36,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 161 transitions. [2022-02-14 21:49:36,118 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 161 transitions. Word has length 117 [2022-02-14 21:49:36,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:49:36,119 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 161 transitions. [2022-02-14 21:49:36,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-02-14 21:49:36,119 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 161 transitions. [2022-02-14 21:49:36,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-02-14 21:49:36,122 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:49:36,122 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:49:36,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-14 21:49:36,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:49:36,322 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:49:36,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:49:36,323 INFO L85 PathProgramCache]: Analyzing trace with hash 525706014, now seen corresponding path program 3 times [2022-02-14 21:49:36,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:49:36,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018581217] [2022-02-14 21:49:36,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:49:36,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:49:36,329 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 21:49:36,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831942283] [2022-02-14 21:49:36,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 21:49:36,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:49:36,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:49:36,334 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) [2022-02-14 21:49:36,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-14 21:49:36,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-14 21:49:36,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:49:36,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-14 21:49:36,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:49:36,652 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 21:49:36,697 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 21:49:36,726 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 21:49:36,779 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 21:49:36,852 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-02-14 21:49:36,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:49:42,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:49:42,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018581217] [2022-02-14 21:49:42,938 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 21:49:42,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831942283] [2022-02-14 21:49:42,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831942283] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:49:42,938 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 21:49:42,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-02-14 21:49:42,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564486187] [2022-02-14 21:49:42,938 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 21:49:42,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 21:49:42,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:49:42,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 21:49:42,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-14 21:49:42,939 INFO L87 Difference]: Start difference. First operand 130 states and 161 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-14 21:49:43,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:49:43,004 INFO L93 Difference]: Finished difference Result 134 states and 164 transitions. [2022-02-14 21:49:43,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 21:49:43,005 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 118 [2022-02-14 21:49:43,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:49:43,005 INFO L225 Difference]: With dead ends: 134 [2022-02-14 21:49:43,005 INFO L226 Difference]: Without dead ends: 132 [2022-02-14 21:49:43,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-02-14 21:49:43,006 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 17 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:49:43,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 70 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:49:43,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-14 21:49:43,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2022-02-14 21:49:43,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 69 states have internal predecessors, (77), 28 states have call successors, (28), 16 states have call predecessors, (28), 14 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 21:49:43,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 131 transitions. [2022-02-14 21:49:43,009 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 131 transitions. Word has length 118 [2022-02-14 21:49:43,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:49:43,010 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 131 transitions. [2022-02-14 21:49:43,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-14 21:49:43,010 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 131 transitions. [2022-02-14 21:49:43,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-14 21:49:43,011 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:49:43,011 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:49:43,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-14 21:49:43,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-14 21:49:43,223 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:49:43,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:49:43,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1635698089, now seen corresponding path program 3 times [2022-02-14 21:49:43,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:49:43,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961886538] [2022-02-14 21:49:43,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:49:43,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:49:43,236 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 21:49:43,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399275728] [2022-02-14 21:49:43,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 21:49:43,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:49:43,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:49:43,243 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) [2022-02-14 21:49:43,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-14 21:49:43,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-14 21:49:43,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:49:43,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-14 21:49:43,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:49:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2022-02-14 21:49:43,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:49:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2022-02-14 21:49:43,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:49:43,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961886538] [2022-02-14 21:49:43,651 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 21:49:43,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399275728] [2022-02-14 21:49:43,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399275728] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:49:43,651 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 21:49:43,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-02-14 21:49:43,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624767179] [2022-02-14 21:49:43,652 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 21:49:43,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-14 21:49:43,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:49:43,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-14 21:49:43,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-14 21:49:43,653 INFO L87 Difference]: Start difference. First operand 112 states and 131 transitions. Second operand has 12 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-02-14 21:49:43,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:49:43,774 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2022-02-14 21:49:43,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 21:49:43,774 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 121 [2022-02-14 21:49:43,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:49:43,775 INFO L225 Difference]: With dead ends: 118 [2022-02-14 21:49:43,775 INFO L226 Difference]: Without dead ends: 0 [2022-02-14 21:49:43,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-02-14 21:49:43,775 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:49:43,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 138 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:49:43,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-14 21:49:43,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-14 21:49:43,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-14 21:49:43,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-14 21:49:43,776 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 121 [2022-02-14 21:49:43,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:49:43,776 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-14 21:49:43,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-02-14 21:49:43,776 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-14 21:49:43,776 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-14 21:49:43,778 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-14 21:49:43,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-14 21:49:43,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-14 21:49:43,981 INFO L732 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:49:43,982 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-14 21:49:43,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 09:49:43 BasicIcfg [2022-02-14 21:49:43,983 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-14 21:49:43,983 INFO L158 Benchmark]: Toolchain (without parser) took 53920.21ms. Allocated memory was 221.2MB in the beginning and 266.3MB in the end (delta: 45.1MB). Free memory was 167.3MB in the beginning and 223.8MB in the end (delta: -56.5MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 21:49:43,983 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 221.2MB. Free memory is still 184.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 21:49:43,984 INFO L158 Benchmark]: CACSL2BoogieTranslator took 204.49ms. Allocated memory is still 221.2MB. Free memory was 167.1MB in the beginning and 192.6MB in the end (delta: -25.5MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB. [2022-02-14 21:49:43,984 INFO L158 Benchmark]: Boogie Preprocessor took 25.95ms. Allocated memory is still 221.2MB. Free memory was 192.6MB in the beginning and 191.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-14 21:49:43,984 INFO L158 Benchmark]: RCFGBuilder took 242.97ms. Allocated memory is still 221.2MB. Free memory was 190.8MB in the beginning and 181.1MB in the end (delta: 9.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-14 21:49:43,984 INFO L158 Benchmark]: IcfgTransformer took 12.41ms. Allocated memory is still 221.2MB. Free memory was 181.1MB in the beginning and 179.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-14 21:49:43,984 INFO L158 Benchmark]: TraceAbstraction took 53431.08ms. Allocated memory was 221.2MB in the beginning and 266.3MB in the end (delta: 45.1MB). Free memory was 179.3MB in the beginning and 223.8MB in the end (delta: -44.6MB). Peak memory consumption was 1.8MB. Max. memory is 8.0GB. [2022-02-14 21:49:43,985 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 221.2MB. Free memory is still 184.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 204.49ms. Allocated memory is still 221.2MB. Free memory was 167.1MB in the beginning and 192.6MB in the end (delta: -25.5MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.95ms. Allocated memory is still 221.2MB. Free memory was 192.6MB in the beginning and 191.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 242.97ms. Allocated memory is still 221.2MB. Free memory was 190.8MB in the beginning and 181.1MB in the end (delta: 9.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 12.41ms. Allocated memory is still 221.2MB. Free memory was 181.1MB in the beginning and 179.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 53431.08ms. Allocated memory was 221.2MB in the beginning and 266.3MB in the end (delta: 45.1MB). Free memory was 179.3MB in the beginning and 223.8MB in the end (delta: -44.6MB). Peak memory consumption was 1.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 53.4s, OverallIterations: 13, TraceHistogramMax: 20, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 17.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 378 SdHoareTripleChecker+Valid, 6.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 316 mSDsluCounter, 2031 SdHoareTripleChecker+Invalid, 5.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1570 mSDsCounter, 447 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1710 IncrementalHoareTripleChecker+Invalid, 2157 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 447 mSolverCounterUnsat, 461 mSDtfsCounter, 1710 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1477 GetRequests, 1334 SyntacticMatches, 22 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 17.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=168occurred in iteration=10, InterpolantAutomatonStates: 97, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 75 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 32.3s InterpolantComputationTime, 867 NumberOfCodeBlocks, 745 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1442 ConstructedInterpolants, 0 QuantifiedInterpolants, 15863 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1855 ConjunctsInSsa, 195 ConjunctsInUnsatCore, 20 InterpolantComputations, 6 PerfectInterpolantSequences, 6338/6540 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-14 21:49:44,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...