/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/loop-lit/gj2007.c.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 15:00:17,426 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 15:00:17,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 15:00:17,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 15:00:17,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 15:00:17,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 15:00:17,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 15:00:17,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 15:00:17,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 15:00:17,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 15:00:17,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 15:00:17,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 15:00:17,531 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 15:00:17,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 15:00:17,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 15:00:17,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 15:00:17,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 15:00:17,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 15:00:17,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 15:00:17,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 15:00:17,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 15:00:17,548 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 15:00:17,558 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 15:00:17,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 15:00:17,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 15:00:17,560 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 15:00:17,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 15:00:17,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 15:00:17,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 15:00:17,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 15:00:17,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 15:00:17,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 15:00:17,562 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 15:00:17,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 15:00:17,562 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 15:00:17,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 15:00:17,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 15:00:17,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 15:00:17,562 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 15:00:17,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 15:00:17,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:00:17,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 15:00:17,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 15:00:17,563 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 15:00:17,563 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 15:00:17,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 15:00:17,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 15:00:17,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 15:00:17,768 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 15:00:17,769 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 15:00:17,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2022-03-17 15:00:17,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37d455fc6/fa274b55ca8d4451b49350d1e6fc2883/FLAG94e0e1bae [2022-03-17 15:00:18,181 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 15:00:18,182 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2022-03-17 15:00:18,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37d455fc6/fa274b55ca8d4451b49350d1e6fc2883/FLAG94e0e1bae [2022-03-17 15:00:18,195 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37d455fc6/fa274b55ca8d4451b49350d1e6fc2883 [2022-03-17 15:00:18,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 15:00:18,198 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 15:00:18,199 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 15:00:18,199 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 15:00:18,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 15:00:18,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:00:18" (1/1) ... [2022-03-17 15:00:18,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e77a0a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:00:18, skipping insertion in model container [2022-03-17 15:00:18,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:00:18" (1/1) ... [2022-03-17 15:00:18,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 15:00:18,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 15:00:18,454 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c[1613,1626] [2022-03-17 15:00:18,460 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:00:18,468 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 15:00:18,495 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c[1613,1626] [2022-03-17 15:00:18,498 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:00:18,509 INFO L208 MainTranslator]: Completed translation [2022-03-17 15:00:18,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:00:18 WrapperNode [2022-03-17 15:00:18,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 15:00:18,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 15:00:18,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 15:00:18,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 15:00:18,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:00:18" (1/1) ... [2022-03-17 15:00:18,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:00:18" (1/1) ... [2022-03-17 15:00:18,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:00:18" (1/1) ... [2022-03-17 15:00:18,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:00:18" (1/1) ... [2022-03-17 15:00:18,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:00:18" (1/1) ... [2022-03-17 15:00:18,542 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:00:18" (1/1) ... [2022-03-17 15:00:18,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:00:18" (1/1) ... [2022-03-17 15:00:18,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 15:00:18,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 15:00:18,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 15:00:18,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 15:00:18,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:00:18" (1/1) ... [2022-03-17 15:00:18,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:00:18,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:00:18,578 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 15:00:18,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 15:00:18,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 15:00:18,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 15:00:18,609 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 15:00:18,609 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 15:00:18,609 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 15:00:18,609 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 15:00:18,609 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 15:00:18,609 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 15:00:18,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 15:00:18,609 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 15:00:18,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 15:00:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 15:00:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 15:00:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 15:00:18,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 15:00:18,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 15:00:18,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 15:00:18,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 15:00:18,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 15:00:18,662 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 15:00:18,664 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 15:00:18,819 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 15:00:18,823 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 15:00:18,823 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-17 15:00:18,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:00:18 BoogieIcfgContainer [2022-03-17 15:00:18,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 15:00:18,825 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 15:00:18,825 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 15:00:18,846 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 15:00:18,848 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:00:18" (1/1) ... [2022-03-17 15:00:18,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:00:18 BasicIcfg [2022-03-17 15:00:18,863 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 15:00:18,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 15:00:18,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 15:00:18,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 15:00:18,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 03:00:18" (1/4) ... [2022-03-17 15:00:18,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19bee1d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:00:18, skipping insertion in model container [2022-03-17 15:00:18,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:00:18" (2/4) ... [2022-03-17 15:00:18,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19bee1d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:00:18, skipping insertion in model container [2022-03-17 15:00:18,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:00:18" (3/4) ... [2022-03-17 15:00:18,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19bee1d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 03:00:18, skipping insertion in model container [2022-03-17 15:00:18,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:00:18" (4/4) ... [2022-03-17 15:00:18,868 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+lhb-reducer.cJordan [2022-03-17 15:00:18,871 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 15:00:18,871 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 15:00:18,900 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 15:00:18,904 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 [2022-03-17 15:00:18,904 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 15:00:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 28 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:00:18,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 15:00:18,929 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:00:18,930 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:00:18,930 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:00:18,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:00:18,934 INFO L85 PathProgramCache]: Analyzing trace with hash 538022728, now seen corresponding path program 1 times [2022-03-17 15:00:18,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:00:18,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867813299] [2022-03-17 15:00:18,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:00:18,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:00:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:19,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:00:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:00:19,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:00:19,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867813299] [2022-03-17 15:00:19,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867813299] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:00:19,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:00:19,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 15:00:19,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757632382] [2022-03-17 15:00:19,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:00:19,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 15:00:19,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:00:19,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 15:00:19,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 15:00:19,177 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 28 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:19,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:00:19,335 INFO L93 Difference]: Finished difference Result 53 states and 80 transitions. [2022-03-17 15:00:19,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 15:00:19,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-17 15:00:19,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:00:19,348 INFO L225 Difference]: With dead ends: 53 [2022-03-17 15:00:19,349 INFO L226 Difference]: Without dead ends: 47 [2022-03-17 15:00:19,350 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 15:00:19,353 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:00:19,354 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 22 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:00:19,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-17 15:00:19,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2022-03-17 15:00:19,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:19,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2022-03-17 15:00:19,378 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 27 [2022-03-17 15:00:19,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:00:19,379 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2022-03-17 15:00:19,379 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:19,379 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2022-03-17 15:00:19,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 15:00:19,381 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:00:19,381 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:00:19,382 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 15:00:19,382 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:00:19,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:00:19,386 INFO L85 PathProgramCache]: Analyzing trace with hash 538052519, now seen corresponding path program 1 times [2022-03-17 15:00:19,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:00:19,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968872578] [2022-03-17 15:00:19,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:00:19,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:00:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:19,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:00:19,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:00:19,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:00:19,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968872578] [2022-03-17 15:00:19,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968872578] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:00:19,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:00:19,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-17 15:00:19,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404098224] [2022-03-17 15:00:19,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:00:19,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 15:00:19,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:00:19,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 15:00:19,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-03-17 15:00:19,535 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:19,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:00:19,686 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2022-03-17 15:00:19,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-17 15:00:19,687 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-17 15:00:19,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:00:19,688 INFO L225 Difference]: With dead ends: 30 [2022-03-17 15:00:19,688 INFO L226 Difference]: Without dead ends: 30 [2022-03-17 15:00:19,688 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-03-17 15:00:19,689 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:00:19,690 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:00:19,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-17 15:00:19,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-17 15:00:19,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-03-17 15:00:19,694 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2022-03-17 15:00:19,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:00:19,694 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-03-17 15:00:19,695 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:19,695 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-03-17 15:00:19,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 15:00:19,697 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:00:19,697 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:00:19,697 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 15:00:19,697 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:00:19,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:00:19,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1642813573, now seen corresponding path program 1 times [2022-03-17 15:00:19,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:00:19,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034000678] [2022-03-17 15:00:19,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:00:19,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:00:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:19,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:00:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:00:19,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:00:19,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034000678] [2022-03-17 15:00:19,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034000678] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:00:19,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:00:19,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-17 15:00:19,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202568038] [2022-03-17 15:00:19,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:00:19,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 15:00:19,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:00:19,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 15:00:19,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-03-17 15:00:19,855 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:00:20,014 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-03-17 15:00:20,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 15:00:20,015 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-17 15:00:20,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:00:20,015 INFO L225 Difference]: With dead ends: 32 [2022-03-17 15:00:20,016 INFO L226 Difference]: Without dead ends: 32 [2022-03-17 15:00:20,016 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-03-17 15:00:20,017 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:00:20,017 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 22 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:00:20,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-17 15:00:20,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-17 15:00:20,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:20,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-03-17 15:00:20,020 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2022-03-17 15:00:20,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:00:20,020 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-03-17 15:00:20,021 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:20,021 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-03-17 15:00:20,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-17 15:00:20,021 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:00:20,021 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:00:20,021 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 15:00:20,022 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:00:20,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:00:20,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1833702941, now seen corresponding path program 1 times [2022-03-17 15:00:20,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:00:20,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861738924] [2022-03-17 15:00:20,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:00:20,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:00:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:20,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:00:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:00:20,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:00:20,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861738924] [2022-03-17 15:00:20,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861738924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:00:20,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840460913] [2022-03-17 15:00:20,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:00:20,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:00:20,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:00:20,156 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:00:20,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 15:00:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:20,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-17 15:00:20,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:00:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:00:20,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:00:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:00:20,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840460913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:00:20,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:00:20,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-17 15:00:20,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527567411] [2022-03-17 15:00:20,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:00:20,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-17 15:00:20,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:00:20,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-17 15:00:20,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-17 15:00:20,515 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:20,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:00:20,873 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2022-03-17 15:00:20,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-17 15:00:20,874 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 1 states have call successors, (3), 2 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 31 [2022-03-17 15:00:20,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:00:20,876 INFO L225 Difference]: With dead ends: 56 [2022-03-17 15:00:20,876 INFO L226 Difference]: Without dead ends: 56 [2022-03-17 15:00:20,877 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-03-17 15:00:20,883 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 92 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:00:20,883 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 17 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:00:20,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-17 15:00:20,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-17 15:00:20,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:20,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-03-17 15:00:20,893 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 31 [2022-03-17 15:00:20,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:00:20,893 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-03-17 15:00:20,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:20,894 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-03-17 15:00:20,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-17 15:00:20,896 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:00:20,896 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:00:20,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 15:00:21,109 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:00:21,110 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:00:21,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:00:21,110 INFO L85 PathProgramCache]: Analyzing trace with hash 171106635, now seen corresponding path program 2 times [2022-03-17 15:00:21,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:00:21,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777074828] [2022-03-17 15:00:21,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:00:21,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:00:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:21,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:00:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:00:21,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:00:21,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777074828] [2022-03-17 15:00:21,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777074828] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:00:21,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366409319] [2022-03-17 15:00:21,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 15:00:21,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:00:21,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:00:21,384 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:00:21,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 15:00:21,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 15:00:21,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:00:21,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-17 15:00:21,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:00:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:00:21,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:00:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:00:22,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366409319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:00:22,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:00:22,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-17 15:00:22,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798427848] [2022-03-17 15:00:22,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:00:22,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-17 15:00:22,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:00:22,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-17 15:00:22,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-17 15:00:22,151 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:23,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:00:23,219 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2022-03-17 15:00:23,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-17 15:00:23,219 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 1 states have call successors, (3), 2 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 55 [2022-03-17 15:00:23,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:00:23,220 INFO L225 Difference]: With dead ends: 104 [2022-03-17 15:00:23,220 INFO L226 Difference]: Without dead ends: 104 [2022-03-17 15:00:23,222 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-03-17 15:00:23,223 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 144 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:00:23,223 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 42 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:00:23,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-17 15:00:23,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-03-17 15:00:23,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2022-03-17 15:00:23,230 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 55 [2022-03-17 15:00:23,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:00:23,230 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2022-03-17 15:00:23,230 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:23,230 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2022-03-17 15:00:23,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-17 15:00:23,235 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:00:23,235 INFO L500 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:00:23,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 15:00:23,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:00:23,452 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:00:23,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:00:23,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1936218085, now seen corresponding path program 3 times [2022-03-17 15:00:23,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:00:23,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189880275] [2022-03-17 15:00:23,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:00:23,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:00:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:24,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:00:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:00:24,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:00:24,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189880275] [2022-03-17 15:00:24,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189880275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:00:24,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407038345] [2022-03-17 15:00:24,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 15:00:24,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:00:24,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:00:24,248 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:00:24,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 15:00:24,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-17 15:00:24,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:00:24,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-17 15:00:24,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:00:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 111 proven. 1 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2022-03-17 15:00:24,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:00:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 111 proven. 1 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2022-03-17 15:00:24,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407038345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:00:24,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:00:24,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 4, 4] total 54 [2022-03-17 15:00:24,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070657893] [2022-03-17 15:00:24,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:00:24,578 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-17 15:00:24,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:00:24,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-17 15:00:24,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-17 15:00:24,580 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 54 states, 54 states have (on average 2.4074074074074074) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:25,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:00:25,856 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2022-03-17 15:00:25,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-17 15:00:25,857 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.4074074074074074) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (3), 2 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 103 [2022-03-17 15:00:25,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:00:25,858 INFO L225 Difference]: With dead ends: 112 [2022-03-17 15:00:25,858 INFO L226 Difference]: Without dead ends: 112 [2022-03-17 15:00:25,860 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-03-17 15:00:25,865 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 145 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:00:25,866 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 41 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 15:00:25,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-17 15:00:25,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-03-17 15:00:25,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 108 states have (on average 1.0462962962962963) internal successors, (113), 108 states have internal predecessors, (113), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2022-03-17 15:00:25,878 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 103 [2022-03-17 15:00:25,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:00:25,879 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2022-03-17 15:00:25,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.4074074074074074) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:25,879 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2022-03-17 15:00:25,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-17 15:00:25,880 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:00:25,880 INFO L500 BasicCegarLoop]: trace histogram [42, 38, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:00:25,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 15:00:26,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:00:26,084 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:00:26,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:00:26,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1431719632, now seen corresponding path program 4 times [2022-03-17 15:00:26,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:00:26,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230829704] [2022-03-17 15:00:26,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:00:26,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:00:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:27,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:00:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 273 proven. 1482 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-17 15:00:27,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:00:27,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230829704] [2022-03-17 15:00:27,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230829704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:00:27,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509504875] [2022-03-17 15:00:27,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 15:00:27,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:00:27,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:00:27,069 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:00:27,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 15:00:27,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 15:00:27,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:00:27,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-17 15:00:27,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:00:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 273 proven. 1482 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-17 15:00:27,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:00:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 273 proven. 1482 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-17 15:00:27,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509504875] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:00:27,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:00:27,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 54 [2022-03-17 15:00:27,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244438022] [2022-03-17 15:00:27,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:00:27,606 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-17 15:00:27,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:00:27,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-17 15:00:27,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-17 15:00:27,607 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 54 states, 54 states have (on average 2.4444444444444446) internal successors, (132), 53 states have internal predecessors, (132), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:28,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:00:28,782 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2022-03-17 15:00:28,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-17 15:00:28,783 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.4444444444444446) internal successors, (132), 53 states have internal predecessors, (132), 1 states have call successors, (3), 2 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 111 [2022-03-17 15:00:28,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:00:28,784 INFO L225 Difference]: With dead ends: 118 [2022-03-17 15:00:28,784 INFO L226 Difference]: Without dead ends: 118 [2022-03-17 15:00:28,786 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4031, Invalid=6681, Unknown=0, NotChecked=0, Total=10712 [2022-03-17 15:00:28,787 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 101 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:00:28,787 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 22 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 15:00:28,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-17 15:00:28,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-03-17 15:00:28,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 114 states have (on average 1.043859649122807) internal successors, (119), 114 states have internal predecessors, (119), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2022-03-17 15:00:28,797 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 111 [2022-03-17 15:00:28,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:00:28,797 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2022-03-17 15:00:28,797 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.4444444444444446) internal successors, (132), 53 states have internal predecessors, (132), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:28,798 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2022-03-17 15:00:28,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-17 15:00:28,800 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:00:28,800 INFO L500 BasicCegarLoop]: trace histogram [45, 41, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:00:28,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 15:00:29,018 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:00:29,018 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:00:29,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:00:29,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1878629302, now seen corresponding path program 5 times [2022-03-17 15:00:29,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:00:29,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850229760] [2022-03-17 15:00:29,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:00:29,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:00:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:30,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:00:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:00:30,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:00:30,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850229760] [2022-03-17 15:00:30,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850229760] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:00:30,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701394354] [2022-03-17 15:00:30,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 15:00:30,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:00:30,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:00:30,075 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:00:30,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 15:00:30,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2022-03-17 15:00:30,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:00:30,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-17 15:00:30,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:00:30,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 484 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-03-17 15:00:30,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:00:31,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 484 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-03-17 15:00:31,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701394354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:00:31,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:00:31,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 25, 25] total 99 [2022-03-17 15:00:31,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248956357] [2022-03-17 15:00:31,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:00:31,702 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-17 15:00:31,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:00:31,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-17 15:00:31,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-03-17 15:00:31,705 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand has 99 states, 99 states have (on average 2.2626262626262625) internal successors, (224), 98 states have internal predecessors, (224), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:35,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:00:35,368 INFO L93 Difference]: Finished difference Result 202 states and 248 transitions. [2022-03-17 15:00:35,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-17 15:00:35,369 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.2626262626262625) internal successors, (224), 98 states have internal predecessors, (224), 1 states have call successors, (3), 2 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 117 [2022-03-17 15:00:35,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:00:35,370 INFO L225 Difference]: With dead ends: 202 [2022-03-17 15:00:35,370 INFO L226 Difference]: Without dead ends: 202 [2022-03-17 15:00:35,375 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4849 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-03-17 15:00:35,375 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 302 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 601 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 601 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 15:00:35,376 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 46 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [601 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 15:00:35,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-17 15:00:35,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2022-03-17 15:00:35,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 198 states have (on average 1.2373737373737375) internal successors, (245), 198 states have internal predecessors, (245), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:35,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 248 transitions. [2022-03-17 15:00:35,390 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 248 transitions. Word has length 117 [2022-03-17 15:00:35,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:00:35,391 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 248 transitions. [2022-03-17 15:00:35,391 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.2626262626262625) internal successors, (224), 98 states have internal predecessors, (224), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:35,391 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 248 transitions. [2022-03-17 15:00:35,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-03-17 15:00:35,392 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:00:35,392 INFO L500 BasicCegarLoop]: trace histogram [87, 46, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:00:35,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 15:00:35,609 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:00:35,609 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:00:35,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:00:35,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1130384116, now seen corresponding path program 6 times [2022-03-17 15:00:35,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:00:35,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765864271] [2022-03-17 15:00:35,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:00:35,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:00:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:38,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:00:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:00:38,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:00:38,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765864271] [2022-03-17 15:00:38,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765864271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:00:38,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88485884] [2022-03-17 15:00:38,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 15:00:38,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:00:38,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:00:38,148 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:00:38,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 15:00:38,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 87 check-sat command(s) [2022-03-17 15:00:38,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:00:38,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-17 15:00:38,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:00:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 3813 proven. 2116 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-03-17 15:00:38,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:00:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 3813 proven. 2116 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-03-17 15:00:39,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88485884] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:00:39,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:00:39,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 49, 49] total 103 [2022-03-17 15:00:39,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622873740] [2022-03-17 15:00:39,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:00:39,179 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-17 15:00:39,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:00:39,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-17 15:00:39,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-17 15:00:39,181 INFO L87 Difference]: Start difference. First operand 202 states and 248 transitions. Second operand has 103 states, 103 states have (on average 2.2233009708737863) internal successors, (229), 102 states have internal predecessors, (229), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:43,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:00:43,709 INFO L93 Difference]: Finished difference Result 210 states and 260 transitions. [2022-03-17 15:00:43,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-17 15:00:43,710 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.2233009708737863) internal successors, (229), 102 states have internal predecessors, (229), 1 states have call successors, (3), 2 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 201 [2022-03-17 15:00:43,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:00:43,711 INFO L225 Difference]: With dead ends: 210 [2022-03-17 15:00:43,711 INFO L226 Difference]: Without dead ends: 210 [2022-03-17 15:00:43,713 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 448 SyntacticMatches, 2 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5096 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-03-17 15:00:43,713 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 238 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 838 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 838 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 15:00:43,714 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 26 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [838 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-17 15:00:43,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-03-17 15:00:43,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-03-17 15:00:43,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 206 states have (on average 1.2475728155339805) internal successors, (257), 206 states have internal predecessors, (257), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:43,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 260 transitions. [2022-03-17 15:00:43,718 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 260 transitions. Word has length 201 [2022-03-17 15:00:43,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:00:43,718 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 260 transitions. [2022-03-17 15:00:43,718 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.2233009708737863) internal successors, (229), 102 states have internal predecessors, (229), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:43,718 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 260 transitions. [2022-03-17 15:00:43,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-03-17 15:00:43,722 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:00:43,722 INFO L500 BasicCegarLoop]: trace histogram [91, 50, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:00:43,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 15:00:43,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:00:43,940 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:00:43,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:00:43,940 INFO L85 PathProgramCache]: Analyzing trace with hash 604234368, now seen corresponding path program 7 times [2022-03-17 15:00:43,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:00:43,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477395596] [2022-03-17 15:00:43,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:00:43,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:00:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:45,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:00:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-03-17 15:00:45,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:00:45,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477395596] [2022-03-17 15:00:45,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477395596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:00:45,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025828719] [2022-03-17 15:00:45,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 15:00:45,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:00:45,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:00:45,240 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:00:45,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 15:00:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:45,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-17 15:00:45,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:00:46,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-03-17 15:00:46,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:00:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-03-17 15:00:46,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025828719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:00:46,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:00:46,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 56 [2022-03-17 15:00:46,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516187428] [2022-03-17 15:00:46,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:00:46,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-17 15:00:46,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:00:46,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-17 15:00:46,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2022-03-17 15:00:46,943 INFO L87 Difference]: Start difference. First operand 210 states and 260 transitions. Second operand has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 55 states have internal predecessors, (128), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:50,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:00:50,877 INFO L93 Difference]: Finished difference Result 2862 states and 4237 transitions. [2022-03-17 15:00:50,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-17 15:00:50,877 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 55 states have internal predecessors, (128), 1 states have call successors, (3), 2 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 209 [2022-03-17 15:00:50,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:00:50,884 INFO L225 Difference]: With dead ends: 2862 [2022-03-17 15:00:50,884 INFO L226 Difference]: Without dead ends: 2861 [2022-03-17 15:00:50,886 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 414 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=321, Invalid=11235, Unknown=0, NotChecked=0, Total=11556 [2022-03-17 15:00:50,886 INFO L912 BasicCegarLoop]: 128 mSDtfsCounter, 180 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 8982 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 9034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 8982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-17 15:00:50,886 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 390 Invalid, 9034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 8982 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-17 15:00:50,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2022-03-17 15:00:50,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 212. [2022-03-17 15:00:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 208 states have (on average 1.25) internal successors, (260), 208 states have internal predecessors, (260), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:50,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 263 transitions. [2022-03-17 15:00:50,899 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 263 transitions. Word has length 209 [2022-03-17 15:00:50,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:00:50,900 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 263 transitions. [2022-03-17 15:00:50,900 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 55 states have internal predecessors, (128), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:50,900 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 263 transitions. [2022-03-17 15:00:50,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-03-17 15:00:50,901 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:00:50,901 INFO L500 BasicCegarLoop]: trace histogram [92, 51, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:00:50,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 15:00:51,118 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:00:51,118 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:00:51,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:00:51,119 INFO L85 PathProgramCache]: Analyzing trace with hash 847690173, now seen corresponding path program 8 times [2022-03-17 15:00:51,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:00:51,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684564379] [2022-03-17 15:00:51,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:00:51,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:00:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:51,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:00:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 6742 proven. 0 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-03-17 15:00:51,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:00:51,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684564379] [2022-03-17 15:00:51,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684564379] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:00:51,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:00:51,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-17 15:00:51,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966105388] [2022-03-17 15:00:51,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:00:51,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-17 15:00:51,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:00:51,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-17 15:00:51,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-03-17 15:00:51,771 INFO L87 Difference]: Start difference. First operand 212 states and 263 transitions. Second operand has 53 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 52 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:52,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:00:52,487 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2022-03-17 15:00:52,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-17 15:00:52,487 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 52 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-03-17 15:00:52,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:00:52,488 INFO L225 Difference]: With dead ends: 207 [2022-03-17 15:00:52,488 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 15:00:52,490 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-03-17 15:00:52,496 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:00:52,497 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 39 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 15:00:52,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 15:00:52,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 15:00:52,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-17 15:00:52,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 15:00:52,497 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 211 [2022-03-17 15:00:52,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:00:52,497 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 15:00:52,498 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 52 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:52,498 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 15:00:52,498 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 15:00:52,500 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 15:00:52,500 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-17 15:00:52,505 INFO L718 BasicCegarLoop]: Path program histogram: [8, 1, 1, 1] [2022-03-17 15:00:52,506 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 15:00:52,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 03:00:52 BasicIcfg [2022-03-17 15:00:52,519 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 15:00:52,520 INFO L158 Benchmark]: Toolchain (without parser) took 34321.51ms. Allocated memory was 204.5MB in the beginning and 511.7MB in the end (delta: 307.2MB). Free memory was 154.3MB in the beginning and 329.4MB in the end (delta: -175.1MB). Peak memory consumption was 132.0MB. Max. memory is 8.0GB. [2022-03-17 15:00:52,520 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 204.5MB. Free memory is still 170.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 15:00:52,520 INFO L158 Benchmark]: CACSL2BoogieTranslator took 310.78ms. Allocated memory is still 204.5MB. Free memory was 154.2MB in the beginning and 178.6MB in the end (delta: -24.4MB). Peak memory consumption was 11.1MB. Max. memory is 8.0GB. [2022-03-17 15:00:52,520 INFO L158 Benchmark]: Boogie Preprocessor took 36.16ms. Allocated memory is still 204.5MB. Free memory was 178.6MB in the beginning and 177.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 15:00:52,520 INFO L158 Benchmark]: RCFGBuilder took 277.03ms. Allocated memory is still 204.5MB. Free memory was 177.2MB in the beginning and 164.9MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-17 15:00:52,520 INFO L158 Benchmark]: IcfgTransformer took 38.26ms. Allocated memory is still 204.5MB. Free memory was 164.9MB in the beginning and 163.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 15:00:52,521 INFO L158 Benchmark]: TraceAbstraction took 33655.24ms. Allocated memory was 204.5MB in the beginning and 511.7MB in the end (delta: 307.2MB). Free memory was 162.9MB in the beginning and 329.4MB in the end (delta: -166.6MB). Peak memory consumption was 140.8MB. Max. memory is 8.0GB. [2022-03-17 15:00:52,521 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 204.5MB. Free memory is still 170.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 310.78ms. Allocated memory is still 204.5MB. Free memory was 154.2MB in the beginning and 178.6MB in the end (delta: -24.4MB). Peak memory consumption was 11.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.16ms. Allocated memory is still 204.5MB. Free memory was 178.6MB in the beginning and 177.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 277.03ms. Allocated memory is still 204.5MB. Free memory was 177.2MB in the beginning and 164.9MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 38.26ms. Allocated memory is still 204.5MB. Free memory was 164.9MB in the beginning and 163.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 33655.24ms. Allocated memory was 204.5MB in the beginning and 511.7MB in the end (delta: 307.2MB). Free memory was 162.9MB in the beginning and 329.4MB in the end (delta: -166.6MB). Peak memory consumption was 140.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 96]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 33.6s, OverallIterations: 11, TraceHistogramMax: 92, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 17.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1349 SdHoareTripleChecker+Valid, 4.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1349 mSDsluCounter, 706 SdHoareTripleChecker+Invalid, 3.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 459 mSDsCounter, 2084 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10837 IncrementalHoareTripleChecker+Invalid, 12921 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2084 mSolverCounterUnsat, 247 mSDtfsCounter, 10837 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2728 GetRequests, 1730 SyntacticMatches, 9 SemanticMatches, 989 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17151 ImplicationChecksByTransitivity, 21.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=212occurred in iteration=10, InterpolantAutomatonStates: 520, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 2666 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 13.6s InterpolantComputationTime, 1948 NumberOfCodeBlocks, 1876 NumberOfCodeBlocksAsserted, 154 NumberOfCheckSat, 2750 ConstructedInterpolants, 0 QuantifiedInterpolants, 9123 SizeOfPredicates, 2 NumberOfNonLiveVariables, 2053 ConjunctsInSsa, 268 ConjunctsInUnsatCore, 25 InterpolantComputations, 4 PerfectInterpolantSequences, 31437/72314 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-17 15:00:52,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...