/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-scaling/hard2_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 03:04:26,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 03:04:26,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 03:04:26,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 03:04:26,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 03:04:26,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 03:04:26,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 03:04:26,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 03:04:26,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 03:04:26,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 03:04:26,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 03:04:26,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 03:04:26,441 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 03:04:26,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 03:04:26,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 03:04:26,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 03:04:26,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 03:04:26,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 03:04:26,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 03:04:26,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 03:04:26,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 03:04:26,456 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 03:04:26,467 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 03:04:26,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 03:04:26,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 03:04:26,468 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 03:04:26,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 03:04:26,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 03:04:26,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 03:04:26,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 03:04:26,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 03:04:26,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 03:04:26,470 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 03:04:26,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 03:04:26,470 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 03:04:26,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 03:04:26,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 03:04:26,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 03:04:26,470 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 03:04:26,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 03:04:26,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 03:04:26,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 03:04:26,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 03:04:26,471 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 03:04:26,471 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 03:04:26,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 03:04:26,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 03:04:26,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 03:04:26,682 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 03:04:26,682 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 03:04:26,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c [2022-04-05 03:04:26,739 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aefafa700/b6342cb383db467ea191e3798c799cc7/FLAG12ae1522d [2022-04-05 03:04:27,081 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 03:04:27,081 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c [2022-04-05 03:04:27,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aefafa700/b6342cb383db467ea191e3798c799cc7/FLAG12ae1522d [2022-04-05 03:04:27,092 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aefafa700/b6342cb383db467ea191e3798c799cc7 [2022-04-05 03:04:27,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 03:04:27,095 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 03:04:27,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 03:04:27,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 03:04:27,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 03:04:27,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 03:04:27" (1/1) ... [2022-04-05 03:04:27,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ad8a205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 03:04:27, skipping insertion in model container [2022-04-05 03:04:27,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 03:04:27" (1/1) ... [2022-04-05 03:04:27,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 03:04:27,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 03:04:27,215 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c[526,539] [2022-04-05 03:04:27,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 03:04:27,229 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 03:04:27,238 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c[526,539] [2022-04-05 03:04:27,249 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 03:04:27,257 INFO L208 MainTranslator]: Completed translation [2022-04-05 03:04:27,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 03:04:27 WrapperNode [2022-04-05 03:04:27,258 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 03:04:27,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 03:04:27,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 03:04:27,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 03:04:27,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 03:04:27" (1/1) ... [2022-04-05 03:04:27,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 03:04:27" (1/1) ... [2022-04-05 03:04:27,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 03:04:27" (1/1) ... [2022-04-05 03:04:27,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 03:04:27" (1/1) ... [2022-04-05 03:04:27,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 03:04:27" (1/1) ... [2022-04-05 03:04:27,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 03:04:27" (1/1) ... [2022-04-05 03:04:27,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 03:04:27" (1/1) ... [2022-04-05 03:04:27,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 03:04:27,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 03:04:27,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 03:04:27,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 03:04:27,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 03:04:27" (1/1) ... [2022-04-05 03:04:27,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 03:04:27,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:04:27,326 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) [2022-04-05 03:04:27,332 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 [2022-04-05 03:04:27,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 03:04:27,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 03:04:27,347 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 03:04:27,348 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 03:04:27,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 03:04:27,348 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 03:04:27,348 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 03:04:27,348 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 03:04:27,348 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 03:04:27,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 03:04:27,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 03:04:27,348 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 03:04:27,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 03:04:27,348 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 03:04:27,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 03:04:27,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 03:04:27,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 03:04:27,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 03:04:27,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 03:04:27,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 03:04:27,393 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 03:04:27,394 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 03:04:27,493 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 03:04:27,497 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 03:04:27,498 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 03:04:27,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 03:04:27 BoogieIcfgContainer [2022-04-05 03:04:27,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 03:04:27,499 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 03:04:27,499 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 03:04:27,500 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 03:04:27,502 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 03:04:27" (1/1) ... [2022-04-05 03:04:27,503 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 03:04:27,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 03:04:27 BasicIcfg [2022-04-05 03:04:27,524 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 03:04:27,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 03:04:27,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 03:04:27,527 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 03:04:27,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 03:04:27" (1/4) ... [2022-04-05 03:04:27,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78abfcbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 03:04:27, skipping insertion in model container [2022-04-05 03:04:27,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 03:04:27" (2/4) ... [2022-04-05 03:04:27,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78abfcbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 03:04:27, skipping insertion in model container [2022-04-05 03:04:27,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 03:04:27" (3/4) ... [2022-04-05 03:04:27,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78abfcbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 03:04:27, skipping insertion in model container [2022-04-05 03:04:27,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 03:04:27" (4/4) ... [2022-04-05 03:04:27,529 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound20.cJordan [2022-04-05 03:04:27,542 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 03:04:27,542 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 03:04:27,581 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 03:04:27,588 INFO L340 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 [2022-04-05 03:04:27,588 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 03:04:27,599 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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) [2022-04-05 03:04:27,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 03:04:27,615 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:04:27,615 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:04:27,616 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:04:27,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:04:27,619 INFO L85 PathProgramCache]: Analyzing trace with hash 121155216, now seen corresponding path program 1 times [2022-04-05 03:04:27,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:04:27,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243840322] [2022-04-05 03:04:27,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:27,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:04:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:04:27,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 03:04:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:04:27,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 03:04:27,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:04:27,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243840322] [2022-04-05 03:04:27,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243840322] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 03:04:27,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 03:04:27,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 03:04:27,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788790165] [2022-04-05 03:04:27,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 03:04:27,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 03:04:27,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:04:27,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 03:04:27,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 03:04:27,821 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-04-05 03:04:27,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:04:27,892 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2022-04-05 03:04:27,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 03:04:27,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2022-04-05 03:04:27,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:04:27,903 INFO L225 Difference]: With dead ends: 32 [2022-04-05 03:04:27,903 INFO L226 Difference]: Without dead ends: 27 [2022-04-05 03:04:27,904 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 03:04:27,907 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 03:04:27,908 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 03:04:27,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-05 03:04:27,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-04-05 03:04:27,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 03:04:27,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-04-05 03:04:27,938 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2022-04-05 03:04:27,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:04:27,938 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-04-05 03:04:27,939 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-04-05 03:04:27,939 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-04-05 03:04:27,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 03:04:27,939 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:04:27,940 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:04:27,940 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 03:04:27,940 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:04:27,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:04:27,942 INFO L85 PathProgramCache]: Analyzing trace with hash 152644303, now seen corresponding path program 1 times [2022-04-05 03:04:27,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:04:27,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112788919] [2022-04-05 03:04:27,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:27,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:04:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:04:28,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 03:04:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:04:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 03:04:28,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:04:28,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112788919] [2022-04-05 03:04:28,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112788919] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 03:04:28,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 03:04:28,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 03:04:28,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642334705] [2022-04-05 03:04:28,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 03:04:28,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 03:04:28,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:04:28,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 03:04:28,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 03:04:28,042 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-04-05 03:04:28,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:04:28,201 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2022-04-05 03:04:28,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 03:04:28,203 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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 12 [2022-04-05 03:04:28,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:04:28,204 INFO L225 Difference]: With dead ends: 39 [2022-04-05 03:04:28,204 INFO L226 Difference]: Without dead ends: 39 [2022-04-05 03:04:28,205 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-05 03:04:28,206 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 03:04:28,206 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 85 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 03:04:28,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-05 03:04:28,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-04-05 03:04:28,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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) [2022-04-05 03:04:28,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-04-05 03:04:28,216 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-04-05 03:04:28,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:04:28,216 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-04-05 03:04:28,216 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-04-05 03:04:28,216 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-04-05 03:04:28,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-05 03:04:28,217 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:04:28,217 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:04:28,217 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 03:04:28,217 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:04:28,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:04:28,218 INFO L85 PathProgramCache]: Analyzing trace with hash -400958603, now seen corresponding path program 1 times [2022-04-05 03:04:28,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:04:28,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998299512] [2022-04-05 03:04:28,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:28,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:04:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:04:28,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 03:04:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:04:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 03:04:28,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:04:28,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998299512] [2022-04-05 03:04:28,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998299512] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 03:04:28,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 03:04:28,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 03:04:28,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726996076] [2022-04-05 03:04:28,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 03:04:28,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 03:04:28,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:04:28,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 03:04:28,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 03:04:28,297 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 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) [2022-04-05 03:04:28,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:04:28,351 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-04-05 03:04:28,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 03:04:28,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 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 14 [2022-04-05 03:04:28,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:04:28,352 INFO L225 Difference]: With dead ends: 32 [2022-04-05 03:04:28,352 INFO L226 Difference]: Without dead ends: 32 [2022-04-05 03:04:28,353 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 03:04:28,353 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 03:04:28,354 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 03:04:28,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-05 03:04:28,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-05 03:04:28,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 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) [2022-04-05 03:04:28,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-04-05 03:04:28,358 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2022-04-05 03:04:28,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:04:28,358 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-04-05 03:04:28,358 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 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) [2022-04-05 03:04:28,358 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-04-05 03:04:28,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 03:04:28,358 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:04:28,359 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:04:28,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-05 03:04:28,359 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:04:28,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:04:28,359 INFO L85 PathProgramCache]: Analyzing trace with hash 185978583, now seen corresponding path program 1 times [2022-04-05 03:04:28,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:04:28,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925345244] [2022-04-05 03:04:28,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:28,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:04:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:04:28,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 03:04:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:04:28,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-05 03:04:28,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:04:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 03:04:28,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:04:28,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925345244] [2022-04-05 03:04:28,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925345244] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 03:04:28,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 03:04:28,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 03:04:28,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854139856] [2022-04-05 03:04:28,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 03:04:28,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 03:04:28,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:04:28,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 03:04:28,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 03:04:28,407 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-04-05 03:04:28,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:04:28,498 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-04-05 03:04:28,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 03:04:28,498 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 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 17 [2022-04-05 03:04:28,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:04:28,499 INFO L225 Difference]: With dead ends: 44 [2022-04-05 03:04:28,499 INFO L226 Difference]: Without dead ends: 44 [2022-04-05 03:04:28,499 INFO L912 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 [2022-04-05 03:04:28,500 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 03:04:28,501 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 78 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 03:04:28,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-05 03:04:28,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2022-04-05 03:04:28,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 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) [2022-04-05 03:04:28,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-04-05 03:04:28,505 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2022-04-05 03:04:28,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:04:28,505 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-04-05 03:04:28,505 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-04-05 03:04:28,505 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-04-05 03:04:28,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-05 03:04:28,505 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:04:28,506 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:04:28,506 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-05 03:04:28,506 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:04:28,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:04:28,506 INFO L85 PathProgramCache]: Analyzing trace with hash -820589269, now seen corresponding path program 1 times [2022-04-05 03:04:28,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:04:28,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211772637] [2022-04-05 03:04:28,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:28,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:04:28,515 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:04:28,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824359581] [2022-04-05 03:04:28,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:28,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:04:28,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:04:28,520 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) [2022-04-05 03:04:28,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 03:04:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:04:28,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 03:04:28,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:04:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 03:04:28,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 03:04:28,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:04:28,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211772637] [2022-04-05 03:04:28,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:04:28,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824359581] [2022-04-05 03:04:28,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824359581] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 03:04:28,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 03:04:28,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 03:04:28,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445956183] [2022-04-05 03:04:28,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 03:04:28,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 03:04:28,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:04:28,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 03:04:28,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 03:04:28,670 INFO L87 Difference]: Start difference. First operand 36 states and 44 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, (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) [2022-04-05 03:04:28,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:04:28,707 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2022-04-05 03:04:28,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 03:04:28,707 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, (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 22 [2022-04-05 03:04:28,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:04:28,708 INFO L225 Difference]: With dead ends: 51 [2022-04-05 03:04:28,708 INFO L226 Difference]: Without dead ends: 50 [2022-04-05 03:04:28,708 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 03:04:28,709 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 03:04:28,709 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 121 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 03:04:28,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-05 03:04:28,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-04-05 03:04:28,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 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) [2022-04-05 03:04:28,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-04-05 03:04:28,714 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2022-04-05 03:04:28,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:04:28,714 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-04-05 03:04:28,714 INFO L479 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, (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) [2022-04-05 03:04:28,714 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-04-05 03:04:28,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 03:04:28,715 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:04:28,715 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:04:28,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-05 03:04:28,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:04:28,932 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:04:28,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:04:28,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1259710898, now seen corresponding path program 1 times [2022-04-05 03:04:28,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:04:28,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189163636] [2022-04-05 03:04:28,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:28,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:04:28,946 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:04:28,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177704557] [2022-04-05 03:04:28,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:28,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:04:28,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:04:28,950 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) [2022-04-05 03:04:28,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 03:04:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:04:28,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 03:04:28,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:04:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 03:04:29,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 03:04:29,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:04:29,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189163636] [2022-04-05 03:04:29,081 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:04:29,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177704557] [2022-04-05 03:04:29,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177704557] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 03:04:29,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 03:04:29,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 03:04:29,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094522742] [2022-04-05 03:04:29,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 03:04:29,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 03:04:29,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:04:29,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 03:04:29,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 03:04:29,084 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 03:04:29,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:04:29,107 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2022-04-05 03:04:29,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 03:04:29,108 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-04-05 03:04:29,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:04:29,110 INFO L225 Difference]: With dead ends: 63 [2022-04-05 03:04:29,110 INFO L226 Difference]: Without dead ends: 63 [2022-04-05 03:04:29,111 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 03:04:29,113 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 03:04:29,114 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 03:04:29,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-05 03:04:29,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-04-05 03:04:29,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-05 03:04:29,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-04-05 03:04:29,127 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2022-04-05 03:04:29,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:04:29,128 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-04-05 03:04:29,128 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 03:04:29,129 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-04-05 03:04:29,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 03:04:29,129 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:04:29,129 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:04:29,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 03:04:29,338 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-04-05 03:04:29,339 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:04:29,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:04:29,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1260813165, now seen corresponding path program 1 times [2022-04-05 03:04:29,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:04:29,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733616908] [2022-04-05 03:04:29,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:29,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:04:29,346 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:04:29,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049863580] [2022-04-05 03:04:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:29,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:04:29,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:04:29,348 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) [2022-04-05 03:04:29,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 03:04:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:04:29,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 03:04:29,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:04:29,468 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 03:04:29,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 03:04:29,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:04:29,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733616908] [2022-04-05 03:04:29,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:04:29,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049863580] [2022-04-05 03:04:29,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049863580] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 03:04:29,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 03:04:29,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 03:04:29,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072766408] [2022-04-05 03:04:29,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 03:04:29,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 03:04:29,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:04:29,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 03:04:29,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 03:04:29,470 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-04-05 03:04:29,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:04:29,505 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-04-05 03:04:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 03:04:29,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 30 [2022-04-05 03:04:29,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:04:29,506 INFO L225 Difference]: With dead ends: 74 [2022-04-05 03:04:29,506 INFO L226 Difference]: Without dead ends: 64 [2022-04-05 03:04:29,506 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 03:04:29,506 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 03:04:29,507 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 95 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 03:04:29,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-05 03:04:29,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-04-05 03:04:29,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 03:04:29,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-04-05 03:04:29,510 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2022-04-05 03:04:29,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:04:29,510 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-04-05 03:04:29,510 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-04-05 03:04:29,510 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-04-05 03:04:29,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-05 03:04:29,511 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:04:29,511 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:04:29,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 03:04:29,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:04:29,728 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:04:29,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:04:29,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1811137592, now seen corresponding path program 1 times [2022-04-05 03:04:29,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:04:29,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136242958] [2022-04-05 03:04:29,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:29,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:04:29,737 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:04:29,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817947703] [2022-04-05 03:04:29,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:29,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:04:29,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:04:29,740 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) [2022-04-05 03:04:29,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 03:04:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:04:29,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 03:04:29,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:04:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-05 03:04:29,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:04:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 03:04:29,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:04:29,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136242958] [2022-04-05 03:04:29,920 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:04:29,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817947703] [2022-04-05 03:04:29,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817947703] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 03:04:29,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 03:04:29,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-05 03:04:29,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688860036] [2022-04-05 03:04:29,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 03:04:29,921 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 03:04:29,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:04:29,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 03:04:29,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-05 03:04:29,922 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-05 03:04:29,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:04:29,982 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2022-04-05 03:04:29,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 03:04:29,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 37 [2022-04-05 03:04:29,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:04:29,985 INFO L225 Difference]: With dead ends: 119 [2022-04-05 03:04:29,985 INFO L226 Difference]: Without dead ends: 119 [2022-04-05 03:04:29,985 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-05 03:04:29,986 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 41 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 03:04:29,986 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 152 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 03:04:29,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-05 03:04:30,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2022-04-05 03:04:30,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 74 states have internal predecessors, (86), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-05 03:04:30,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2022-04-05 03:04:30,006 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 37 [2022-04-05 03:04:30,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:04:30,006 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2022-04-05 03:04:30,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-05 03:04:30,006 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2022-04-05 03:04:30,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-05 03:04:30,007 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:04:30,007 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:04:30,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 03:04:30,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:04:30,220 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:04:30,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:04:30,220 INFO L85 PathProgramCache]: Analyzing trace with hash -599722260, now seen corresponding path program 1 times [2022-04-05 03:04:30,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:04:30,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191337736] [2022-04-05 03:04:30,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:30,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:04:30,226 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:04:30,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995868290] [2022-04-05 03:04:30,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:30,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:04:30,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:04:30,227 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) [2022-04-05 03:04:30,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 03:04:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:04:30,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 03:04:30,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:04:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-05 03:04:30,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:04:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-05 03:04:30,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:04:30,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191337736] [2022-04-05 03:04:30,451 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:04:30,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995868290] [2022-04-05 03:04:30,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995868290] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 03:04:30,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 03:04:30,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-05 03:04:30,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074493864] [2022-04-05 03:04:30,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 03:04:30,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 03:04:30,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:04:30,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 03:04:30,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-05 03:04:30,452 INFO L87 Difference]: Start difference. First operand 112 states and 133 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) [2022-04-05 03:04:30,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:04:30,480 INFO L93 Difference]: Finished difference Result 127 states and 150 transitions. [2022-04-05 03:04:30,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 03:04:30,480 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 40 [2022-04-05 03:04:30,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:04:30,482 INFO L225 Difference]: With dead ends: 127 [2022-04-05 03:04:30,482 INFO L226 Difference]: Without dead ends: 125 [2022-04-05 03:04:30,483 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 03:04:30,484 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 03:04:30,485 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 03:04:30,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-04-05 03:04:30,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2022-04-05 03:04:30,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 81 states have internal predecessors, (92), 27 states have call successors, (27), 18 states have call predecessors, (27), 16 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-05 03:04:30,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2022-04-05 03:04:30,496 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 40 [2022-04-05 03:04:30,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:04:30,496 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2022-04-05 03:04:30,497 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 03:04:30,497 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2022-04-05 03:04:30,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-05 03:04:30,500 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:04:30,500 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:04:30,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 03:04:30,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:04:30,715 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:04:30,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:04:30,716 INFO L85 PathProgramCache]: Analyzing trace with hash 560903707, now seen corresponding path program 1 times [2022-04-05 03:04:30,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:04:30,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76731079] [2022-04-05 03:04:30,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:30,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:04:30,722 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:04:30,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1141346361] [2022-04-05 03:04:30,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:30,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:04:30,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:04:30,723 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) [2022-04-05 03:04:30,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 03:04:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:04:30,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 03:04:30,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:04:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-05 03:04:30,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:04:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-05 03:04:30,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:04:30,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76731079] [2022-04-05 03:04:30,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:04:30,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141346361] [2022-04-05 03:04:30,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141346361] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 03:04:30,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 03:04:30,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-05 03:04:30,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596115953] [2022-04-05 03:04:30,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 03:04:30,947 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 03:04:30,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:04:30,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 03:04:30,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-05 03:04:30,947 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-05 03:04:31,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:04:31,046 INFO L93 Difference]: Finished difference Result 224 states and 267 transitions. [2022-04-05 03:04:31,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-05 03:04:31,046 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 53 [2022-04-05 03:04:31,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:04:31,047 INFO L225 Difference]: With dead ends: 224 [2022-04-05 03:04:31,047 INFO L226 Difference]: Without dead ends: 224 [2022-04-05 03:04:31,048 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-04-05 03:04:31,048 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 82 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 03:04:31,048 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 233 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 03:04:31,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-04-05 03:04:31,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 217. [2022-04-05 03:04:31,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 139 states have (on average 1.1942446043165467) internal successors, (166), 148 states have internal predecessors, (166), 51 states have call successors, (51), 28 states have call predecessors, (51), 26 states have return successors, (46), 40 states have call predecessors, (46), 46 states have call successors, (46) [2022-04-05 03:04:31,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 263 transitions. [2022-04-05 03:04:31,061 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 263 transitions. Word has length 53 [2022-04-05 03:04:31,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:04:31,062 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 263 transitions. [2022-04-05 03:04:31,062 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-05 03:04:31,062 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 263 transitions. [2022-04-05 03:04:31,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-05 03:04:31,066 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:04:31,066 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:04:31,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 03:04:31,266 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:04:31,266 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:04:31,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:04:31,267 INFO L85 PathProgramCache]: Analyzing trace with hash -453219492, now seen corresponding path program 1 times [2022-04-05 03:04:31,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:04:31,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326729664] [2022-04-05 03:04:31,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:31,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:04:31,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:04:31,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424954369] [2022-04-05 03:04:31,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:31,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:04:31,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:04:31,274 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) [2022-04-05 03:04:31,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 03:04:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:04:31,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-05 03:04:31,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:04:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-05 03:04:31,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:04:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-05 03:04:32,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:04:32,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326729664] [2022-04-05 03:04:32,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:04:32,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424954369] [2022-04-05 03:04:32,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424954369] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 03:04:32,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 03:04:32,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-05 03:04:32,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113523373] [2022-04-05 03:04:32,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 03:04:32,306 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 03:04:32,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:04:32,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 03:04:32,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-05 03:04:32,307 INFO L87 Difference]: Start difference. First operand 217 states and 263 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 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) [2022-04-05 03:04:36,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:04:36,859 INFO L93 Difference]: Finished difference Result 310 states and 393 transitions. [2022-04-05 03:04:36,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 03:04:36,860 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 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 62 [2022-04-05 03:04:36,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:04:36,861 INFO L225 Difference]: With dead ends: 310 [2022-04-05 03:04:36,861 INFO L226 Difference]: Without dead ends: 303 [2022-04-05 03:04:36,861 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-04-05 03:04:36,862 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 52 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 03:04:36,862 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 204 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-05 03:04:36,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-04-05 03:04:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2022-04-05 03:04:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 185 states have (on average 1.2324324324324325) internal successors, (228), 191 states have internal predecessors, (228), 58 states have call successors, (58), 31 states have call predecessors, (58), 30 states have return successors, (55), 51 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-05 03:04:36,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 341 transitions. [2022-04-05 03:04:36,878 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 341 transitions. Word has length 62 [2022-04-05 03:04:36,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:04:36,879 INFO L478 AbstractCegarLoop]: Abstraction has 274 states and 341 transitions. [2022-04-05 03:04:36,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 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) [2022-04-05 03:04:36,879 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 341 transitions. [2022-04-05 03:04:36,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-05 03:04:36,880 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:04:36,880 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:04:36,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 03:04:37,081 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:04:37,081 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:04:37,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:04:37,082 INFO L85 PathProgramCache]: Analyzing trace with hash 929445032, now seen corresponding path program 1 times [2022-04-05 03:04:37,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:04:37,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244509372] [2022-04-05 03:04:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:37,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:04:37,090 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:04:37,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240811158] [2022-04-05 03:04:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:37,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:04:37,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:04:37,091 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) [2022-04-05 03:04:37,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 03:04:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:04:37,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-05 03:04:37,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:04:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-04-05 03:04:37,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:04:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-04-05 03:04:37,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:04:37,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244509372] [2022-04-05 03:04:37,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:04:37,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240811158] [2022-04-05 03:04:37,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240811158] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 03:04:37,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 03:04:37,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-05 03:04:37,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476892551] [2022-04-05 03:04:37,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 03:04:37,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 03:04:37,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:04:37,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 03:04:37,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-04-05 03:04:37,697 INFO L87 Difference]: Start difference. First operand 274 states and 341 transitions. Second operand has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-05 03:04:38,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:04:38,080 INFO L93 Difference]: Finished difference Result 266 states and 313 transitions. [2022-04-05 03:04:38,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-05 03:04:38,081 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 73 [2022-04-05 03:04:38,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:04:38,082 INFO L225 Difference]: With dead ends: 266 [2022-04-05 03:04:38,082 INFO L226 Difference]: Without dead ends: 239 [2022-04-05 03:04:38,082 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-04-05 03:04:38,083 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 66 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 03:04:38,083 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 173 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 03:04:38,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-04-05 03:04:38,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 223. [2022-04-05 03:04:38,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 150 states have (on average 1.1933333333333334) internal successors, (179), 154 states have internal predecessors, (179), 45 states have call successors, (45), 29 states have call predecessors, (45), 27 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2022-04-05 03:04:38,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 266 transitions. [2022-04-05 03:04:38,089 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 266 transitions. Word has length 73 [2022-04-05 03:04:38,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:04:38,089 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 266 transitions. [2022-04-05 03:04:38,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-05 03:04:38,089 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 266 transitions. [2022-04-05 03:04:38,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-05 03:04:38,090 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:04:38,090 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:04:38,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 03:04:38,309 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-05 03:04:38,309 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:04:38,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:04:38,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1139963303, now seen corresponding path program 1 times [2022-04-05 03:04:38,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:04:38,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53251405] [2022-04-05 03:04:38,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:38,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:04:38,315 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:04:38,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729743593] [2022-04-05 03:04:38,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:38,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:04:38,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:04:38,316 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) [2022-04-05 03:04:38,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 03:04:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:04:38,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-05 03:04:38,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:04:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-04-05 03:04:38,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 03:04:38,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:04:38,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53251405] [2022-04-05 03:04:38,512 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:04:38,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729743593] [2022-04-05 03:04:38,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729743593] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 03:04:38,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 03:04:38,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 03:04:38,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32328425] [2022-04-05 03:04:38,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 03:04:38,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 03:04:38,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:04:38,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 03:04:38,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-04-05 03:04:38,513 INFO L87 Difference]: Start difference. First operand 223 states and 266 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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) [2022-04-05 03:04:38,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:04:38,550 INFO L93 Difference]: Finished difference Result 222 states and 263 transitions. [2022-04-05 03:04:38,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 03:04:38,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 82 [2022-04-05 03:04:38,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:04:38,552 INFO L225 Difference]: With dead ends: 222 [2022-04-05 03:04:38,552 INFO L226 Difference]: Without dead ends: 222 [2022-04-05 03:04:38,552 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-04-05 03:04:38,553 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 25 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 03:04:38,553 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 92 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 03:04:38,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-04-05 03:04:38,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2022-04-05 03:04:38,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 147 states have (on average 1.163265306122449) internal successors, (171), 149 states have internal predecessors, (171), 43 states have call successors, (43), 27 states have call predecessors, (43), 26 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-05 03:04:38,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 255 transitions. [2022-04-05 03:04:38,563 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 255 transitions. Word has length 82 [2022-04-05 03:04:38,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:04:38,564 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 255 transitions. [2022-04-05 03:04:38,564 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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) [2022-04-05 03:04:38,564 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 255 transitions. [2022-04-05 03:04:38,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-05 03:04:38,567 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:04:38,567 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:04:38,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 03:04:38,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-05 03:04:38,783 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:04:38,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:04:38,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2090333941, now seen corresponding path program 2 times [2022-04-05 03:04:38,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:04:38,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220836801] [2022-04-05 03:04:38,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:04:38,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:04:38,790 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:04:38,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072501508] [2022-04-05 03:04:38,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 03:04:38,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:04:38,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:04:38,792 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) [2022-04-05 03:04:38,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 03:04:38,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 03:04:38,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 03:04:38,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-05 03:04:38,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:04:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-05 03:04:39,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:04:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-05 03:04:53,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:04:53,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220836801] [2022-04-05 03:04:53,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:04:53,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072501508] [2022-04-05 03:04:53,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072501508] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 03:04:53,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 03:04:53,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-05 03:04:53,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73196581] [2022-04-05 03:04:53,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 03:04:53,471 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 03:04:53,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:04:53,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 03:04:53,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-04-05 03:04:53,472 INFO L87 Difference]: Start difference. First operand 217 states and 255 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 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) [2022-04-05 03:05:10,976 WARN L232 SmtUtils]: Spent 16.93s on a formula simplification. DAG size of input: 192 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 03:05:18,499 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 03:05:19,779 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 03:05:22,457 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 03:05:25,273 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 03:05:28,146 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 03:05:30,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 03:05:32,872 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 03:05:32,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:05:32,882 INFO L93 Difference]: Finished difference Result 293 states and 379 transitions. [2022-04-05 03:05:32,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-05 03:05:32,882 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 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 94 [2022-04-05 03:05:32,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:05:32,884 INFO L225 Difference]: With dead ends: 293 [2022-04-05 03:05:32,884 INFO L226 Difference]: Without dead ends: 275 [2022-04-05 03:05:32,884 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2022-04-05 03:05:32,885 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 125 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 193 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2022-04-05 03:05:32,885 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 380 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 799 Invalid, 5 Unknown, 0 Unchecked, 18.1s Time] [2022-04-05 03:05:32,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-04-05 03:05:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 257. [2022-04-05 03:05:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 172 states have (on average 1.2267441860465116) internal successors, (211), 177 states have internal predecessors, (211), 57 states have call successors, (57), 28 states have call predecessors, (57), 27 states have return successors, (55), 51 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-05 03:05:32,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 323 transitions. [2022-04-05 03:05:32,894 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 323 transitions. Word has length 94 [2022-04-05 03:05:32,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:05:32,894 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 323 transitions. [2022-04-05 03:05:32,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 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) [2022-04-05 03:05:32,895 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 323 transitions. [2022-04-05 03:05:32,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-04-05 03:05:32,895 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:05:32,895 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:05:32,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 03:05:33,096 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-05 03:05:33,096 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:05:33,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:05:33,097 INFO L85 PathProgramCache]: Analyzing trace with hash -105290329, now seen corresponding path program 1 times [2022-04-05 03:05:33,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:05:33,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107949306] [2022-04-05 03:05:33,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:05:33,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:05:33,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:05:33,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619366942] [2022-04-05 03:05:33,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:05:33,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:05:33,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:05:33,103 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) [2022-04-05 03:05:33,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 03:05:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:05:33,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 03:05:33,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:05:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-05 03:05:33,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:05:33,462 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-04-05 03:05:33,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:05:33,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107949306] [2022-04-05 03:05:33,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:05:33,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619366942] [2022-04-05 03:05:33,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619366942] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 03:05:33,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 03:05:33,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-05 03:05:33,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658472650] [2022-04-05 03:05:33,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 03:05:33,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 03:05:33,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:05:33,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 03:05:33,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-05 03:05:33,464 INFO L87 Difference]: Start difference. First operand 257 states and 323 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-04-05 03:05:33,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:05:33,672 INFO L93 Difference]: Finished difference Result 661 states and 888 transitions. [2022-04-05 03:05:33,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-05 03:05:33,672 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 100 [2022-04-05 03:05:33,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:05:33,674 INFO L225 Difference]: With dead ends: 661 [2022-04-05 03:05:33,674 INFO L226 Difference]: Without dead ends: 659 [2022-04-05 03:05:33,675 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-04-05 03:05:33,675 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 148 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 03:05:33,675 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 400 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 03:05:33,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-04-05 03:05:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 552. [2022-04-05 03:05:33,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 361 states have (on average 1.2825484764542936) internal successors, (463), 378 states have internal predecessors, (463), 136 states have call successors, (136), 56 states have call predecessors, (136), 54 states have return successors, (131), 117 states have call predecessors, (131), 131 states have call successors, (131) [2022-04-05 03:05:33,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 730 transitions. [2022-04-05 03:05:33,690 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 730 transitions. Word has length 100 [2022-04-05 03:05:33,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:05:33,691 INFO L478 AbstractCegarLoop]: Abstraction has 552 states and 730 transitions. [2022-04-05 03:05:33,691 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-04-05 03:05:33,691 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 730 transitions. [2022-04-05 03:05:33,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-04-05 03:05:33,692 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:05:33,692 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:05:33,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 03:05:33,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-05 03:05:33,907 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:05:33,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:05:33,908 INFO L85 PathProgramCache]: Analyzing trace with hash 331614142, now seen corresponding path program 1 times [2022-04-05 03:05:33,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:05:33,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61532565] [2022-04-05 03:05:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:05:33,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:05:33,914 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:05:33,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989345628] [2022-04-05 03:05:33,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:05:33,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:05:33,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:05:33,918 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 03:05:33,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 03:05:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:05:33,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-05 03:05:33,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:05:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-05 03:05:34,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:05:34,354 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-05 03:05:34,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:05:34,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61532565] [2022-04-05 03:05:34,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:05:34,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989345628] [2022-04-05 03:05:34,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989345628] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 03:05:34,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 03:05:34,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-04-05 03:05:34,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898408365] [2022-04-05 03:05:34,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 03:05:34,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-05 03:05:34,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:05:34,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-05 03:05:34,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-04-05 03:05:34,355 INFO L87 Difference]: Start difference. First operand 552 states and 730 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 16 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) [2022-04-05 03:05:34,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:05:34,687 INFO L93 Difference]: Finished difference Result 1124 states and 1476 transitions. [2022-04-05 03:05:34,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-05 03:05:34,688 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 16 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) Word has length 108 [2022-04-05 03:05:34,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:05:34,691 INFO L225 Difference]: With dead ends: 1124 [2022-04-05 03:05:34,691 INFO L226 Difference]: Without dead ends: 1122 [2022-04-05 03:05:34,692 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2022-04-05 03:05:34,692 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 328 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 03:05:34,692 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 500 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 03:05:34,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-04-05 03:05:34,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1097. [2022-04-05 03:05:34,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 729 states have (on average 1.2455418381344308) internal successors, (908), 758 states have internal predecessors, (908), 279 states have call successors, (279), 90 states have call predecessors, (279), 88 states have return successors, (270), 248 states have call predecessors, (270), 270 states have call successors, (270) [2022-04-05 03:05:34,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1457 transitions. [2022-04-05 03:05:34,712 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1457 transitions. Word has length 108 [2022-04-05 03:05:34,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:05:34,712 INFO L478 AbstractCegarLoop]: Abstraction has 1097 states and 1457 transitions. [2022-04-05 03:05:34,712 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 16 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) [2022-04-05 03:05:34,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1457 transitions. [2022-04-05 03:05:34,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-05 03:05:34,713 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:05:34,713 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 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] [2022-04-05 03:05:34,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-05 03:05:34,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-05 03:05:34,927 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:05:34,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:05:34,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1288142005, now seen corresponding path program 1 times [2022-04-05 03:05:34,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:05:34,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829457776] [2022-04-05 03:05:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:05:34,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:05:34,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:05:34,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020408875] [2022-04-05 03:05:34,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:05:34,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:05:34,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:05:34,935 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 03:05:34,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-05 03:05:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:05:34,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 03:05:34,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:05:35,239 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-05 03:05:35,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:05:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-05 03:05:36,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:05:36,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829457776] [2022-04-05 03:05:36,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:05:36,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020408875] [2022-04-05 03:05:36,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020408875] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 03:05:36,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 03:05:36,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-05 03:05:36,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511862153] [2022-04-05 03:05:36,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 03:05:36,036 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 03:05:36,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:05:36,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 03:05:36,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-04-05 03:05:36,037 INFO L87 Difference]: Start difference. First operand 1097 states and 1457 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 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) [2022-04-05 03:05:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:05:36,289 INFO L93 Difference]: Finished difference Result 1101 states and 1461 transitions. [2022-04-05 03:05:36,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 03:05:36,290 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 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 110 [2022-04-05 03:05:36,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:05:36,293 INFO L225 Difference]: With dead ends: 1101 [2022-04-05 03:05:36,293 INFO L226 Difference]: Without dead ends: 1097 [2022-04-05 03:05:36,293 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 207 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-04-05 03:05:36,294 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 3 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 03:05:36,294 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 295 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 03:05:36,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-04-05 03:05:36,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1097. [2022-04-05 03:05:36,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 729 states have (on average 1.242798353909465) internal successors, (906), 758 states have internal predecessors, (906), 279 states have call successors, (279), 90 states have call predecessors, (279), 88 states have return successors, (270), 248 states have call predecessors, (270), 270 states have call successors, (270) [2022-04-05 03:05:36,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1455 transitions. [2022-04-05 03:05:36,313 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1455 transitions. Word has length 110 [2022-04-05 03:05:36,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:05:36,313 INFO L478 AbstractCegarLoop]: Abstraction has 1097 states and 1455 transitions. [2022-04-05 03:05:36,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 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) [2022-04-05 03:05:36,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1455 transitions. [2022-04-05 03:05:36,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-04-05 03:05:36,315 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:05:36,316 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:05:36,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-05 03:05:36,532 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-05 03:05:36,533 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:05:36,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:05:36,533 INFO L85 PathProgramCache]: Analyzing trace with hash 848408867, now seen corresponding path program 2 times [2022-04-05 03:05:36,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:05:36,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834359701] [2022-04-05 03:05:36,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:05:36,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:05:36,540 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:05:36,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150795118] [2022-04-05 03:05:36,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 03:05:36,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:05:36,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:05:36,543 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 03:05:36,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-05 03:05:36,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 03:05:36,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 03:05:36,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 03:05:36,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:05:36,740 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 102 proven. 51 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-04-05 03:05:36,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:05:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 69 proven. 18 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-05 03:05:37,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:05:37,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834359701] [2022-04-05 03:05:37,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:05:37,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150795118] [2022-04-05 03:05:37,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150795118] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 03:05:37,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 03:05:37,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-04-05 03:05:37,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669166505] [2022-04-05 03:05:37,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 03:05:37,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 03:05:37,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:05:37,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 03:05:37,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-05 03:05:37,056 INFO L87 Difference]: Start difference. First operand 1097 states and 1455 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 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) [2022-04-05 03:05:37,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:05:37,128 INFO L93 Difference]: Finished difference Result 947 states and 1203 transitions. [2022-04-05 03:05:37,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 03:05:37,139 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 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 124 [2022-04-05 03:05:37,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:05:37,142 INFO L225 Difference]: With dead ends: 947 [2022-04-05 03:05:37,142 INFO L226 Difference]: Without dead ends: 907 [2022-04-05 03:05:37,142 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 237 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-05 03:05:37,142 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 3 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 03:05:37,143 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 238 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 03:05:37,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-04-05 03:05:37,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 905. [2022-04-05 03:05:37,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 598 states have (on average 1.2040133779264215) internal successors, (720), 627 states have internal predecessors, (720), 221 states have call successors, (221), 87 states have call predecessors, (221), 85 states have return successors, (212), 190 states have call predecessors, (212), 212 states have call successors, (212) [2022-04-05 03:05:37,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1153 transitions. [2022-04-05 03:05:37,159 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1153 transitions. Word has length 124 [2022-04-05 03:05:37,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:05:37,160 INFO L478 AbstractCegarLoop]: Abstraction has 905 states and 1153 transitions. [2022-04-05 03:05:37,160 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 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) [2022-04-05 03:05:37,160 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1153 transitions. [2022-04-05 03:05:37,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-04-05 03:05:37,161 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:05:37,162 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:05:37,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-05 03:05:37,378 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:05:37,379 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:05:37,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:05:37,379 INFO L85 PathProgramCache]: Analyzing trace with hash 722879610, now seen corresponding path program 3 times [2022-04-05 03:05:37,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:05:37,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677276897] [2022-04-05 03:05:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:05:37,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:05:37,387 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:05:37,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737791805] [2022-04-05 03:05:37,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 03:05:37,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:05:37,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:05:37,389 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 03:05:37,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-05 03:05:37,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 03:05:37,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 03:05:37,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-05 03:05:37,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:05:37,716 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 03:05:37,796 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 03:05:37,989 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 03:05:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2022-04-05 03:05:38,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:05:48,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:05:48,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677276897] [2022-04-05 03:05:48,853 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:05:48,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737791805] [2022-04-05 03:05:48,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737791805] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 03:05:48,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 03:05:48,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-05 03:05:48,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167773073] [2022-04-05 03:05:48,854 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 03:05:48,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 03:05:48,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:05:48,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 03:05:48,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-04-05 03:05:48,855 INFO L87 Difference]: Start difference. First operand 905 states and 1153 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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) [2022-04-05 03:05:48,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:05:48,942 INFO L93 Difference]: Finished difference Result 933 states and 1174 transitions. [2022-04-05 03:05:48,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 03:05:48,943 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 126 [2022-04-05 03:05:48,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:05:48,946 INFO L225 Difference]: With dead ends: 933 [2022-04-05 03:05:48,946 INFO L226 Difference]: Without dead ends: 921 [2022-04-05 03:05:48,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-04-05 03:05:48,946 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 03:05:48,946 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 94 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 03:05:48,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-04-05 03:05:48,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 695. [2022-04-05 03:05:48,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 468 states have (on average 1.1752136752136753) internal successors, (550), 470 states have internal predecessors, (550), 153 states have call successors, (153), 75 states have call predecessors, (153), 73 states have return successors, (150), 149 states have call predecessors, (150), 150 states have call successors, (150) [2022-04-05 03:05:48,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 853 transitions. [2022-04-05 03:05:48,963 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 853 transitions. Word has length 126 [2022-04-05 03:05:48,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:05:48,964 INFO L478 AbstractCegarLoop]: Abstraction has 695 states and 853 transitions. [2022-04-05 03:05:48,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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) [2022-04-05 03:05:48,964 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 853 transitions. [2022-04-05 03:05:48,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-05 03:05:48,965 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:05:48,965 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:05:48,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-05 03:05:49,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:05:49,183 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:05:49,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:05:49,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1722143882, now seen corresponding path program 3 times [2022-04-05 03:05:49,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:05:49,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003411845] [2022-04-05 03:05:49,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:05:49,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:05:49,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:05:49,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49121168] [2022-04-05 03:05:49,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 03:05:49,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:05:49,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:05:49,192 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 03:05:49,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-05 03:05:49,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 03:05:49,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 03:05:49,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 03:05:49,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:05:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-04-05 03:05:49,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:05:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-04-05 03:05:49,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:05:49,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003411845] [2022-04-05 03:05:49,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:05:49,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49121168] [2022-04-05 03:05:49,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49121168] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 03:05:49,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 03:05:49,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-04-05 03:05:49,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125058433] [2022-04-05 03:05:49,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 03:05:49,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 03:05:49,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:05:49,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 03:05:49,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-04-05 03:05:49,630 INFO L87 Difference]: Start difference. First operand 695 states and 853 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 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) [2022-04-05 03:05:49,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:05:49,726 INFO L93 Difference]: Finished difference Result 769 states and 909 transitions. [2022-04-05 03:05:49,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 03:05:49,726 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 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 128 [2022-04-05 03:05:49,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:05:49,728 INFO L225 Difference]: With dead ends: 769 [2022-04-05 03:05:49,728 INFO L226 Difference]: Without dead ends: 755 [2022-04-05 03:05:49,728 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-04-05 03:05:49,729 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 03:05:49,729 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 127 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 03:05:49,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-04-05 03:05:49,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 539. [2022-04-05 03:05:49,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 362 states have (on average 1.1049723756906078) internal successors, (400), 373 states have internal predecessors, (400), 103 states have call successors, (103), 74 states have call predecessors, (103), 73 states have return successors, (101), 91 states have call predecessors, (101), 101 states have call successors, (101) [2022-04-05 03:05:49,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 604 transitions. [2022-04-05 03:05:49,737 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 604 transitions. Word has length 128 [2022-04-05 03:05:49,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:05:49,737 INFO L478 AbstractCegarLoop]: Abstraction has 539 states and 604 transitions. [2022-04-05 03:05:49,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 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) [2022-04-05 03:05:49,738 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 604 transitions. [2022-04-05 03:05:49,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-04-05 03:05:49,739 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:05:49,739 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 32, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:05:49,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-05 03:05:49,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:05:49,947 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:05:49,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:05:49,948 INFO L85 PathProgramCache]: Analyzing trace with hash -206704767, now seen corresponding path program 2 times [2022-04-05 03:05:49,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:05:49,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348208680] [2022-04-05 03:05:49,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:05:49,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:05:49,957 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:05:49,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694098949] [2022-04-05 03:05:49,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 03:05:49,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:05:49,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:05:49,965 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 03:05:49,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-05 03:05:50,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 03:05:50,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 03:05:50,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-05 03:05:50,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:05:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 2222 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-05 03:05:50,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:05:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 326 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-04-05 03:05:50,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:05:50,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348208680] [2022-04-05 03:05:50,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:05:50,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694098949] [2022-04-05 03:05:50,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694098949] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 03:05:50,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 03:05:50,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2022-04-05 03:05:50,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419257321] [2022-04-05 03:05:50,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 03:05:50,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 03:05:50,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:05:50,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 03:05:50,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-05 03:05:50,798 INFO L87 Difference]: Start difference. First operand 539 states and 604 transitions. Second operand has 24 states, 24 states have (on average 5.916666666666667) internal successors, (142), 24 states have internal predecessors, (142), 22 states have call successors, (68), 17 states have call predecessors, (68), 16 states have return successors, (66), 20 states have call predecessors, (66), 20 states have call successors, (66) [2022-04-05 03:05:51,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:05:51,283 INFO L93 Difference]: Finished difference Result 816 states and 923 transitions. [2022-04-05 03:05:51,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-05 03:05:51,283 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.916666666666667) internal successors, (142), 24 states have internal predecessors, (142), 22 states have call successors, (68), 17 states have call predecessors, (68), 16 states have return successors, (66), 20 states have call predecessors, (66), 20 states have call successors, (66) Word has length 224 [2022-04-05 03:05:51,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:05:51,286 INFO L225 Difference]: With dead ends: 816 [2022-04-05 03:05:51,286 INFO L226 Difference]: Without dead ends: 816 [2022-04-05 03:05:51,286 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 424 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=517, Invalid=965, Unknown=0, NotChecked=0, Total=1482 [2022-04-05 03:05:51,287 INFO L913 BasicCegarLoop]: 119 mSDtfsCounter, 349 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 03:05:51,287 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 486 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 03:05:51,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-04-05 03:05:51,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 815. [2022-04-05 03:05:51,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 548 states have (on average 1.1131386861313868) internal successors, (610), 565 states have internal predecessors, (610), 157 states have call successors, (157), 110 states have call predecessors, (157), 109 states have return successors, (155), 139 states have call predecessors, (155), 155 states have call successors, (155) [2022-04-05 03:05:51,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 922 transitions. [2022-04-05 03:05:51,298 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 922 transitions. Word has length 224 [2022-04-05 03:05:51,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:05:51,298 INFO L478 AbstractCegarLoop]: Abstraction has 815 states and 922 transitions. [2022-04-05 03:05:51,298 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.916666666666667) internal successors, (142), 24 states have internal predecessors, (142), 22 states have call successors, (68), 17 states have call predecessors, (68), 16 states have return successors, (66), 20 states have call predecessors, (66), 20 states have call successors, (66) [2022-04-05 03:05:51,298 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 922 transitions. [2022-04-05 03:05:51,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-04-05 03:05:51,301 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:05:51,301 INFO L499 BasicCegarLoop]: trace histogram [45, 44, 44, 17, 16, 16, 16, 16, 16, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:05:51,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-05 03:05:51,518 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:05:51,519 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:05:51,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:05:51,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1664620565, now seen corresponding path program 3 times [2022-04-05 03:05:51,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:05:51,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843128724] [2022-04-05 03:05:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:05:51,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:05:51,530 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:05:51,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914684272] [2022-04-05 03:05:51,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 03:05:51,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:05:51,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:05:51,531 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 03:05:51,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-05 03:05:51,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-04-05 03:05:51,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 03:05:51,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-05 03:05:51,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:05:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4660 backedges. 2247 proven. 69 refuted. 0 times theorem prover too weak. 2344 trivial. 0 not checked. [2022-04-05 03:05:52,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:05:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4660 backedges. 491 proven. 85 refuted. 0 times theorem prover too weak. 4084 trivial. 0 not checked. [2022-04-05 03:05:54,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:05:54,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843128724] [2022-04-05 03:05:54,098 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:05:54,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914684272] [2022-04-05 03:05:54,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914684272] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 03:05:54,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 03:05:54,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2022-04-05 03:05:54,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296021495] [2022-04-05 03:05:54,099 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 03:05:54,099 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 03:05:54,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:05:54,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 03:05:54,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-04-05 03:05:54,100 INFO L87 Difference]: Start difference. First operand 815 states and 922 transitions. Second operand has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 states have internal predecessors, (75), 11 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (47), 11 states have call predecessors, (47), 11 states have call successors, (47) [2022-04-05 03:05:54,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:05:54,496 INFO L93 Difference]: Finished difference Result 923 states and 1075 transitions. [2022-04-05 03:05:54,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 03:05:54,498 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 states have internal predecessors, (75), 11 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (47), 11 states have call predecessors, (47), 11 states have call successors, (47) Word has length 308 [2022-04-05 03:05:54,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:05:54,500 INFO L225 Difference]: With dead ends: 923 [2022-04-05 03:05:54,500 INFO L226 Difference]: Without dead ends: 731 [2022-04-05 03:05:54,500 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 603 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-04-05 03:05:54,501 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 19 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 03:05:54,501 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 336 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 03:05:54,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-04-05 03:05:54,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 731. [2022-04-05 03:05:54,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 491 states have (on average 1.1079429735234216) internal successors, (544), 505 states have internal predecessors, (544), 139 states have call successors, (139), 101 states have call predecessors, (139), 100 states have return successors, (137), 124 states have call predecessors, (137), 137 states have call successors, (137) [2022-04-05 03:05:54,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 820 transitions. [2022-04-05 03:05:54,511 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 820 transitions. Word has length 308 [2022-04-05 03:05:54,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:05:54,511 INFO L478 AbstractCegarLoop]: Abstraction has 731 states and 820 transitions. [2022-04-05 03:05:54,511 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 states have internal predecessors, (75), 11 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (47), 11 states have call predecessors, (47), 11 states have call successors, (47) [2022-04-05 03:05:54,511 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 820 transitions. [2022-04-05 03:05:54,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-04-05 03:05:54,514 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:05:54,514 INFO L499 BasicCegarLoop]: trace histogram [49, 48, 48, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:05:54,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-05 03:05:54,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:05:54,727 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:05:54,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:05:54,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1611585699, now seen corresponding path program 2 times [2022-04-05 03:05:54,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:05:54,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096193882] [2022-04-05 03:05:54,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:05:54,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:05:54,736 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:05:54,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153862361] [2022-04-05 03:05:54,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 03:05:54,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:05:54,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:05:54,745 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 03:05:54,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-05 03:05:54,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 03:05:54,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 03:05:54,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-05 03:05:54,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:05:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5132 backedges. 2220 proven. 1910 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2022-04-05 03:05:55,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:05:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5132 backedges. 96 proven. 290 refuted. 0 times theorem prover too weak. 4746 trivial. 0 not checked. [2022-04-05 03:05:55,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:05:55,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096193882] [2022-04-05 03:05:55,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:05:55,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153862361] [2022-04-05 03:05:55,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153862361] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 03:05:55,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 03:05:55,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-04-05 03:05:55,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693041956] [2022-04-05 03:05:55,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 03:05:55,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 03:05:55,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:05:55,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 03:05:55,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-05 03:05:55,796 INFO L87 Difference]: Start difference. First operand 731 states and 820 transitions. Second operand has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 22 states have call successors, (68), 13 states have call predecessors, (68), 13 states have return successors, (66), 21 states have call predecessors, (66), 21 states have call successors, (66) [2022-04-05 03:05:56,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:05:56,257 INFO L93 Difference]: Finished difference Result 733 states and 813 transitions. [2022-04-05 03:05:56,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-05 03:05:56,257 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 22 states have call successors, (68), 13 states have call predecessors, (68), 13 states have return successors, (66), 21 states have call predecessors, (66), 21 states have call successors, (66) Word has length 320 [2022-04-05 03:05:56,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:05:56,259 INFO L225 Difference]: With dead ends: 733 [2022-04-05 03:05:56,259 INFO L226 Difference]: Without dead ends: 733 [2022-04-05 03:05:56,260 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 616 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=665, Invalid=1141, Unknown=0, NotChecked=0, Total=1806 [2022-04-05 03:05:56,260 INFO L913 BasicCegarLoop]: 113 mSDtfsCounter, 261 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 03:05:56,260 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 446 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 03:05:56,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-04-05 03:05:56,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 733. [2022-04-05 03:05:56,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 493 states have (on average 1.0892494929006085) internal successors, (537), 507 states have internal predecessors, (537), 139 states have call successors, (139), 101 states have call predecessors, (139), 100 states have return successors, (137), 124 states have call predecessors, (137), 137 states have call successors, (137) [2022-04-05 03:05:56,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 813 transitions. [2022-04-05 03:05:56,269 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 813 transitions. Word has length 320 [2022-04-05 03:05:56,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:05:56,270 INFO L478 AbstractCegarLoop]: Abstraction has 733 states and 813 transitions. [2022-04-05 03:05:56,270 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 22 states have call successors, (68), 13 states have call predecessors, (68), 13 states have return successors, (66), 21 states have call predecessors, (66), 21 states have call successors, (66) [2022-04-05 03:05:56,270 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 813 transitions. [2022-04-05 03:05:56,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-04-05 03:05:56,273 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:05:56,273 INFO L499 BasicCegarLoop]: trace histogram [48, 47, 47, 14, 13, 13, 13, 13, 13, 13, 13, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:05:56,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-05 03:05:56,490 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:05:56,490 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:05:56,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:05:56,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1950046478, now seen corresponding path program 4 times [2022-04-05 03:05:56,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:05:56,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274106084] [2022-04-05 03:05:56,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:05:56,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:05:56,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:05:56,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846168600] [2022-04-05 03:05:56,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 03:05:56,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:05:56,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:05:56,500 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 03:05:56,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-05 03:06:11,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 03:06:11,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 03:06:11,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-05 03:06:11,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:06:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5038 backedges. 2016 proven. 246 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2022-04-05 03:06:11,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:06:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5038 backedges. 389 proven. 217 refuted. 0 times theorem prover too weak. 4432 trivial. 0 not checked. [2022-04-05 03:06:13,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:06:13,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274106084] [2022-04-05 03:06:13,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:06:13,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846168600] [2022-04-05 03:06:13,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846168600] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 03:06:13,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 03:06:13,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-04-05 03:06:13,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930059884] [2022-04-05 03:06:13,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 03:06:13,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-05 03:06:13,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:06:13,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-05 03:06:13,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-04-05 03:06:13,300 INFO L87 Difference]: Start difference. First operand 733 states and 813 transitions. Second operand has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 15 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (70), 15 states have call predecessors, (70), 15 states have call successors, (70) [2022-04-05 03:06:13,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:06:13,568 INFO L93 Difference]: Finished difference Result 793 states and 900 transitions. [2022-04-05 03:06:13,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 03:06:13,568 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 15 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (70), 15 states have call predecessors, (70), 15 states have call successors, (70) Word has length 320 [2022-04-05 03:06:13,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:06:13,570 INFO L225 Difference]: With dead ends: 793 [2022-04-05 03:06:13,570 INFO L226 Difference]: Without dead ends: 705 [2022-04-05 03:06:13,571 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 623 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-04-05 03:06:13,571 INFO L913 BasicCegarLoop]: 126 mSDtfsCounter, 12 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 03:06:13,571 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 747 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 03:06:13,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-04-05 03:06:13,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 705. [2022-04-05 03:06:13,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 474 states have (on average 1.0864978902953586) internal successors, (515), 487 states have internal predecessors, (515), 133 states have call successors, (133), 98 states have call predecessors, (133), 97 states have return successors, (131), 119 states have call predecessors, (131), 131 states have call successors, (131) [2022-04-05 03:06:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 779 transitions. [2022-04-05 03:06:13,579 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 779 transitions. Word has length 320 [2022-04-05 03:06:13,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:06:13,580 INFO L478 AbstractCegarLoop]: Abstraction has 705 states and 779 transitions. [2022-04-05 03:06:13,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 15 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (70), 15 states have call predecessors, (70), 15 states have call successors, (70) [2022-04-05 03:06:13,580 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 779 transitions. [2022-04-05 03:06:13,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-04-05 03:06:13,581 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:06:13,582 INFO L499 BasicCegarLoop]: trace histogram [49, 48, 48, 13, 12, 12, 12, 12, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:06:13,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-05 03:06:13,794 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-04-05 03:06:13,794 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:06:13,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:06:13,794 INFO L85 PathProgramCache]: Analyzing trace with hash 179823329, now seen corresponding path program 5 times [2022-04-05 03:06:13,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:06:13,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623856735] [2022-04-05 03:06:13,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:06:13,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:06:13,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:06:13,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678647780] [2022-04-05 03:06:13,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 03:06:13,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:06:13,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:06:13,807 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 03:06:13,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-05 03:06:27,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-04-05 03:06:27,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 03:06:27,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-05 03:06:27,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:06:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5196 backedges. 1571 proven. 329 refuted. 0 times theorem prover too weak. 3296 trivial. 0 not checked. [2022-04-05 03:06:27,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:06:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5196 backedges. 397 proven. 239 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2022-04-05 03:06:32,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:06:32,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623856735] [2022-04-05 03:06:32,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:06:32,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678647780] [2022-04-05 03:06:32,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678647780] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 03:06:32,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 03:06:32,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-04-05 03:06:32,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59247812] [2022-04-05 03:06:32,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 03:06:32,159 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-05 03:06:32,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:06:32,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-05 03:06:32,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-04-05 03:06:32,160 INFO L87 Difference]: Start difference. First operand 705 states and 779 transitions. Second operand has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 17 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (80), 17 states have call predecessors, (80), 17 states have call successors, (80) [2022-04-05 03:06:32,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:06:32,497 INFO L93 Difference]: Finished difference Result 777 states and 884 transitions. [2022-04-05 03:06:32,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 03:06:32,498 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 17 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (80), 17 states have call predecessors, (80), 17 states have call successors, (80) Word has length 324 [2022-04-05 03:06:32,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:06:32,500 INFO L225 Difference]: With dead ends: 777 [2022-04-05 03:06:32,500 INFO L226 Difference]: Without dead ends: 677 [2022-04-05 03:06:32,500 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 626 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-04-05 03:06:32,500 INFO L913 BasicCegarLoop]: 141 mSDtfsCounter, 25 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 03:06:32,501 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 479 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 03:06:32,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-04-05 03:06:32,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 677. [2022-04-05 03:06:32,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 455 states have (on average 1.0835164835164834) internal successors, (493), 467 states have internal predecessors, (493), 127 states have call successors, (127), 95 states have call predecessors, (127), 94 states have return successors, (125), 114 states have call predecessors, (125), 125 states have call successors, (125) [2022-04-05 03:06:32,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 745 transitions. [2022-04-05 03:06:32,509 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 745 transitions. Word has length 324 [2022-04-05 03:06:32,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:06:32,509 INFO L478 AbstractCegarLoop]: Abstraction has 677 states and 745 transitions. [2022-04-05 03:06:32,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 17 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (80), 17 states have call predecessors, (80), 17 states have call successors, (80) [2022-04-05 03:06:32,510 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 745 transitions. [2022-04-05 03:06:32,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-04-05 03:06:32,511 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:06:32,511 INFO L499 BasicCegarLoop]: trace histogram [50, 49, 49, 12, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:06:32,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-05 03:06:32,722 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-05 03:06:32,723 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:06:32,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:06:32,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1085750924, now seen corresponding path program 6 times [2022-04-05 03:06:32,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:06:32,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401966507] [2022-04-05 03:06:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:06:32,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:06:32,739 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:06:32,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907240358] [2022-04-05 03:06:32,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 03:06:32,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:06:32,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:06:32,741 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 03:06:32,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-05 03:06:33,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-04-05 03:06:33,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 03:06:33,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 115 conjunts are in the unsatisfiable core [2022-04-05 03:06:33,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:06:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 1317 proven. 541 refuted. 0 times theorem prover too weak. 3512 trivial. 0 not checked. [2022-04-05 03:06:34,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:07:00,427 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 03:07:24,077 WARN L232 SmtUtils]: Spent 6.45s on a formula simplification that was a NOOP. DAG size: 165 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 03:08:42,789 WARN L232 SmtUtils]: Spent 42.60s on a formula simplification. DAG size of input: 117 DAG size of output: 105 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)