/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/float-benchs/zonotope_3.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 16:46:22,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 16:46:22,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 16:46:22,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 16:46:22,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 16:46:22,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 16:46:22,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 16:46:22,638 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 16:46:22,640 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 16:46:22,640 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 16:46:22,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 16:46:22,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 16:46:22,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 16:46:22,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 16:46:22,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 16:46:22,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 16:46:22,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 16:46:22,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 16:46:22,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 16:46:22,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 16:46:22,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 16:46:22,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 16:46:22,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 16:46:22,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 16:46:22,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 16:46:22,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 16:46:22,670 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 16:46:22,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 16:46:22,672 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 16:46:22,679 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 16:46:22,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 16:46:22,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 16:46:22,681 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 16:46:22,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 16:46:22,681 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 16:46:22,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 16:46:22,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 16:46:22,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 16:46:22,681 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 16:46:22,682 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 16:46:22,682 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 16:46:22,682 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 16:46:22,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 16:46:22,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 16:46:22,682 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 16:46:22,682 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 16:46:22,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 16:46:22,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 16:46:22,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 16:46:22,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 16:46:22,684 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 16:46:22,684 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 16:46:22,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 16:46:22,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 16:46:22,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 16:46:22,920 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 16:46:22,921 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 16:46:22,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/zonotope_3.c.p+cfa-reducer.c [2022-01-31 16:46:22,978 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94c4c2116/2a4b9d3354b447958186045a303f1f7a/FLAG695c2e0b2 [2022-01-31 16:46:23,368 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 16:46:23,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/zonotope_3.c.p+cfa-reducer.c [2022-01-31 16:46:23,374 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94c4c2116/2a4b9d3354b447958186045a303f1f7a/FLAG695c2e0b2 [2022-01-31 16:46:23,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94c4c2116/2a4b9d3354b447958186045a303f1f7a [2022-01-31 16:46:23,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 16:46:23,392 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 16:46:23,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 16:46:23,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 16:46:23,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 16:46:23,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:46:23" (1/1) ... [2022-01-31 16:46:23,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e7f025a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:23, skipping insertion in model container [2022-01-31 16:46:23,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:46:23" (1/1) ... [2022-01-31 16:46:23,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 16:46:23,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 16:46:23,605 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/zonotope_3.c.p+cfa-reducer.c[2717,2730] [2022-01-31 16:46:23,608 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 16:46:23,614 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 16:46:23,632 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/zonotope_3.c.p+cfa-reducer.c[2717,2730] [2022-01-31 16:46:23,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 16:46:23,644 INFO L208 MainTranslator]: Completed translation [2022-01-31 16:46:23,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:23 WrapperNode [2022-01-31 16:46:23,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 16:46:23,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 16:46:23,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 16:46:23,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 16:46:23,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:23" (1/1) ... [2022-01-31 16:46:23,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:23" (1/1) ... [2022-01-31 16:46:23,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:23" (1/1) ... [2022-01-31 16:46:23,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:23" (1/1) ... [2022-01-31 16:46:23,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:23" (1/1) ... [2022-01-31 16:46:23,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:23" (1/1) ... [2022-01-31 16:46:23,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:23" (1/1) ... [2022-01-31 16:46:23,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 16:46:23,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 16:46:23,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 16:46:23,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 16:46:23,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:23" (1/1) ... [2022-01-31 16:46:23,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 16:46:23,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 16:46:23,700 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) [2022-01-31 16:46:23,704 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 [2022-01-31 16:46:23,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 16:46:23,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 16:46:23,733 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 16:46:23,733 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 16:46:23,733 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 16:46:23,733 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 16:46:23,733 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 16:46:23,733 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 16:46:23,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 16:46:23,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2022-01-31 16:46:23,734 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 16:46:23,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 16:46:23,734 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-01-31 16:46:23,734 INFO L130 BoogieDeclarations]: Found specification of procedure g [2022-01-31 16:46:23,734 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 16:46:23,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 16:46:23,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 16:46:23,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 16:46:23,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 16:46:23,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 16:46:23,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 16:46:23,827 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 16:46:23,829 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 16:46:24,004 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 16:46:24,009 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 16:46:24,009 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-31 16:46:24,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:46:24 BoogieIcfgContainer [2022-01-31 16:46:24,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 16:46:24,012 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 16:46:24,012 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 16:46:24,013 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 16:46:24,015 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:46:24" (1/1) ... [2022-01-31 16:46:24,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 04:46:24 BasicIcfg [2022-01-31 16:46:24,041 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 16:46:24,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 16:46:24,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 16:46:24,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 16:46:24,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:46:23" (1/4) ... [2022-01-31 16:46:24,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e177647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:46:24, skipping insertion in model container [2022-01-31 16:46:24,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:23" (2/4) ... [2022-01-31 16:46:24,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e177647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:46:24, skipping insertion in model container [2022-01-31 16:46:24,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:46:24" (3/4) ... [2022-01-31 16:46:24,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e177647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 04:46:24, skipping insertion in model container [2022-01-31 16:46:24,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 04:46:24" (4/4) ... [2022-01-31 16:46:24,048 INFO L111 eAbstractionObserver]: Analyzing ICFG zonotope_3.c.p+cfa-reducer.cJordan [2022-01-31 16:46:24,053 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 16:46:24,054 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 16:46:24,102 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 16:46:24,111 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 16:46:24,111 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 16:46:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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) [2022-01-31 16:46:24,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 16:46:24,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 16:46:24,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 16:46:24,141 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 16:46:24,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 16:46:24,148 INFO L85 PathProgramCache]: Analyzing trace with hash 544286821, now seen corresponding path program 1 times [2022-01-31 16:46:24,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 16:46:24,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86265559] [2022-01-31 16:46:24,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:46:24,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 16:46:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:46:24,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 16:46:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:46:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:46:24,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 16:46:24,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86265559] [2022-01-31 16:46:24,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86265559] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 16:46:24,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 16:46:24,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 16:46:24,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138916193] [2022-01-31 16:46:24,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 16:46:24,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 16:46:24,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 16:46:24,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 16:46:24,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 16:46:24,458 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-01-31 16:46:24,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 16:46:24,506 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2022-01-31 16:46:24,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 16:46:24,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 12 [2022-01-31 16:46:24,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 16:46:24,515 INFO L225 Difference]: With dead ends: 29 [2022-01-31 16:46:24,515 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 16:46:24,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 16:46:24,520 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 16:46:24,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 52 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 16:46:24,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 16:46:24,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2022-01-31 16:46:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 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) [2022-01-31 16:46:24,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-01-31 16:46:24,549 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2022-01-31 16:46:24,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 16:46:24,549 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-01-31 16:46:24,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-01-31 16:46:24,550 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-01-31 16:46:24,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 16:46:24,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 16:46:24,551 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 16:46:24,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 16:46:24,552 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 16:46:24,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 16:46:24,557 INFO L85 PathProgramCache]: Analyzing trace with hash -525248851, now seen corresponding path program 1 times [2022-01-31 16:46:24,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 16:46:24,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840348930] [2022-01-31 16:46:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:46:24,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 16:46:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:46:24,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 16:46:24,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:46:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:46:24,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 16:46:24,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840348930] [2022-01-31 16:46:24,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840348930] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 16:46:24,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321519181] [2022-01-31 16:46:24,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:46:24,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:46:24,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 16:46:24,716 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) [2022-01-31 16:46:24,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 16:46:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:46:24,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 16:46:24,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 16:46:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:46:24,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 16:46:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:46:24,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321519181] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 16:46:24,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 16:46:24,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 16:46:24,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875800172] [2022-01-31 16:46:24,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 16:46:24,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 16:46:24,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 16:46:24,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 16:46:24,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 16:46:24,968 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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) [2022-01-31 16:46:25,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 16:46:25,021 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2022-01-31 16:46:25,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 16:46:25,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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 16 [2022-01-31 16:46:25,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 16:46:25,022 INFO L225 Difference]: With dead ends: 34 [2022-01-31 16:46:25,022 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 16:46:25,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 16:46:25,024 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 16:46:25,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 76 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 16:46:25,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 16:46:25,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-31 16:46:25,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 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) [2022-01-31 16:46:25,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-01-31 16:46:25,031 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 16 [2022-01-31 16:46:25,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 16:46:25,032 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-01-31 16:46:25,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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) [2022-01-31 16:46:25,032 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-01-31 16:46:25,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 16:46:25,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 16:46:25,033 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 16:46:25,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 16:46:25,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:46:25,253 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 16:46:25,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 16:46:25,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1932031611, now seen corresponding path program 2 times [2022-01-31 16:46:25,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 16:46:25,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016271971] [2022-01-31 16:46:25,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:46:25,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 16:46:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:46:25,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 16:46:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:46:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 16:46:25,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 16:46:25,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016271971] [2022-01-31 16:46:25,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016271971] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 16:46:25,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624594636] [2022-01-31 16:46:25,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 16:46:25,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:46:25,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 16:46:25,395 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) [2022-01-31 16:46:25,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 16:46:25,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-31 16:46:25,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 16:46:25,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 16:46:25,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 16:46:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 16:46:25,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 16:46:25,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624594636] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 16:46:25,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 16:46:25,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-01-31 16:46:25,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576815386] [2022-01-31 16:46:25,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 16:46:25,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 16:46:25,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 16:46:25,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 16:46:25,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-31 16:46:25,536 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 16:46:25,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 16:46:25,556 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-01-31 16:46:25,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 16:46:25,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 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 28 [2022-01-31 16:46:25,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 16:46:25,560 INFO L225 Difference]: With dead ends: 36 [2022-01-31 16:46:25,560 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 16:46:25,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-31 16:46:25,563 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 16:46:25,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 59 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 16:46:25,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 16:46:25,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-31 16:46:25,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 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) [2022-01-31 16:46:25,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-01-31 16:46:25,575 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2022-01-31 16:46:25,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 16:46:25,576 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-01-31 16:46:25,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 16:46:25,576 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-01-31 16:46:25,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 16:46:25,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 16:46:25,577 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 16:46:25,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 16:46:25,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-31 16:46:25,786 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 16:46:25,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 16:46:25,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1931048508, now seen corresponding path program 1 times [2022-01-31 16:46:25,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 16:46:25,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839054209] [2022-01-31 16:46:25,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:46:25,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 16:46:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:46:25,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 16:46:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:46:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:46:25,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 16:46:25,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839054209] [2022-01-31 16:46:25,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839054209] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 16:46:25,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370683587] [2022-01-31 16:46:25,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:46:25,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:46:25,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 16:46:25,865 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) [2022-01-31 16:46:25,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 16:46:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:46:25,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 16:46:25,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 16:46:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:46:26,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 16:46:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:46:26,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370683587] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 16:46:26,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 16:46:26,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-31 16:46:26,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036940605] [2022-01-31 16:46:26,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 16:46:26,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 16:46:26,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 16:46:26,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 16:46:26,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 16:46:26,154 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 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) [2022-01-31 16:46:26,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 16:46:26,212 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2022-01-31 16:46:26,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 16:46:26,213 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 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 28 [2022-01-31 16:46:26,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 16:46:26,214 INFO L225 Difference]: With dead ends: 64 [2022-01-31 16:46:26,214 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 16:46:26,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 16:46:26,215 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 96 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 16:46:26,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 102 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 16:46:26,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 16:46:26,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-01-31 16:46:26,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.3666666666666667) internal successors, (82), 60 states have internal predecessors, (82), 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) [2022-01-31 16:46:26,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 85 transitions. [2022-01-31 16:46:26,221 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 85 transitions. Word has length 28 [2022-01-31 16:46:26,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 16:46:26,221 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 85 transitions. [2022-01-31 16:46:26,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 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) [2022-01-31 16:46:26,222 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 85 transitions. [2022-01-31 16:46:26,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 16:46:26,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 16:46:26,223 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 16:46:26,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 16:46:26,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:46:26,447 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 16:46:26,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 16:46:26,447 INFO L85 PathProgramCache]: Analyzing trace with hash 399532916, now seen corresponding path program 2 times [2022-01-31 16:46:26,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 16:46:26,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023200474] [2022-01-31 16:46:26,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:46:26,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 16:46:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:46:26,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 16:46:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:46:26,633 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:46:26,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 16:46:26,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023200474] [2022-01-31 16:46:26,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023200474] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 16:46:26,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382172367] [2022-01-31 16:46:26,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 16:46:26,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:46:26,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 16:46:26,635 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) [2022-01-31 16:46:26,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 16:46:26,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 16:46:26,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 16:46:26,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 16:46:26,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 16:46:26,931 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:46:26,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 16:46:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:46:27,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382172367] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 16:46:27,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 16:46:27,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-31 16:46:27,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972073611] [2022-01-31 16:46:27,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 16:46:27,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 16:46:27,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 16:46:27,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 16:46:27,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 16:46:27,232 INFO L87 Difference]: Start difference. First operand 64 states and 85 transitions. Second operand has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 25 states have internal predecessors, (97), 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) [2022-01-31 16:46:27,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 16:46:27,344 INFO L93 Difference]: Finished difference Result 124 states and 169 transitions. [2022-01-31 16:46:27,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 16:46:27,345 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 25 states have internal predecessors, (97), 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 52 [2022-01-31 16:46:27,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 16:46:27,346 INFO L225 Difference]: With dead ends: 124 [2022-01-31 16:46:27,346 INFO L226 Difference]: Without dead ends: 124 [2022-01-31 16:46:27,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 16:46:27,347 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 300 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 16:46:27,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 162 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 16:46:27,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-31 16:46:27,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-01-31 16:46:27,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 120 states have (on average 1.3833333333333333) internal successors, (166), 120 states have internal predecessors, (166), 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) [2022-01-31 16:46:27,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 169 transitions. [2022-01-31 16:46:27,355 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 169 transitions. Word has length 52 [2022-01-31 16:46:27,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 16:46:27,356 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 169 transitions. [2022-01-31 16:46:27,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 25 states have internal predecessors, (97), 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) [2022-01-31 16:46:27,356 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 169 transitions. [2022-01-31 16:46:27,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 16:46:27,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 16:46:27,358 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 16:46:27,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 16:46:27,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:46:27,583 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 16:46:27,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 16:46:27,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1857952044, now seen corresponding path program 3 times [2022-01-31 16:46:27,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 16:46:27,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767142102] [2022-01-31 16:46:27,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:46:27,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 16:46:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:46:28,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 16:46:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:46:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:46:28,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 16:46:28,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767142102] [2022-01-31 16:46:28,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767142102] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 16:46:28,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596841544] [2022-01-31 16:46:28,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 16:46:28,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:46:28,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 16:46:28,013 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) [2022-01-31 16:46:28,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 16:46:28,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-01-31 16:46:28,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 16:46:28,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 16:46:28,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 16:46:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:46:28,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 16:46:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:46:29,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596841544] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 16:46:29,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 16:46:29,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-01-31 16:46:29,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90718609] [2022-01-31 16:46:29,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 16:46:29,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 16:46:29,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 16:46:29,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 16:46:29,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 16:46:29,295 INFO L87 Difference]: Start difference. First operand 124 states and 169 transitions. Second operand has 50 states, 50 states have (on average 3.86) internal successors, (193), 49 states have internal predecessors, (193), 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) [2022-01-31 16:46:29,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 16:46:29,505 INFO L93 Difference]: Finished difference Result 244 states and 337 transitions. [2022-01-31 16:46:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 16:46:29,505 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.86) internal successors, (193), 49 states have internal predecessors, (193), 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 100 [2022-01-31 16:46:29,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 16:46:29,507 INFO L225 Difference]: With dead ends: 244 [2022-01-31 16:46:29,507 INFO L226 Difference]: Without dead ends: 244 [2022-01-31 16:46:29,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 16:46:29,509 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 645 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 16:46:29,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 294 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 16:46:29,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-31 16:46:29,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2022-01-31 16:46:29,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 240 states have (on average 1.3916666666666666) internal successors, (334), 240 states have internal predecessors, (334), 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) [2022-01-31 16:46:29,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 337 transitions. [2022-01-31 16:46:29,521 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 337 transitions. Word has length 100 [2022-01-31 16:46:29,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 16:46:29,521 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 337 transitions. [2022-01-31 16:46:29,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.86) internal successors, (193), 49 states have internal predecessors, (193), 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) [2022-01-31 16:46:29,521 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 337 transitions. [2022-01-31 16:46:29,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-31 16:46:29,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 16:46:29,524 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 16:46:29,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 16:46:29,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:46:29,748 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 16:46:29,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 16:46:29,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1406938516, now seen corresponding path program 4 times [2022-01-31 16:46:29,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 16:46:29,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245360626] [2022-01-31 16:46:29,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:46:29,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 16:46:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:46:30,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 16:46:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:46:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:46:30,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 16:46:30,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245360626] [2022-01-31 16:46:30,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245360626] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 16:46:30,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523386812] [2022-01-31 16:46:30,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 16:46:30,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:46:30,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 16:46:30,880 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) [2022-01-31 16:46:30,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 16:46:31,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 16:46:31,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 16:46:31,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 1724 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-31 16:46:31,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 16:46:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:46:31,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 16:46:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:46:34,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523386812] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 16:46:34,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 16:46:34,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-01-31 16:46:34,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28392569] [2022-01-31 16:46:34,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 16:46:34,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 16:46:34,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 16:46:34,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 16:46:34,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 16:46:34,243 INFO L87 Difference]: Start difference. First operand 244 states and 337 transitions. Second operand has 98 states, 98 states have (on average 3.9285714285714284) internal successors, (385), 97 states have internal predecessors, (385), 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) [2022-01-31 16:46:35,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 16:46:35,132 INFO L93 Difference]: Finished difference Result 484 states and 673 transitions. [2022-01-31 16:46:35,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 16:46:35,133 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.9285714285714284) internal successors, (385), 97 states have internal predecessors, (385), 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 196 [2022-01-31 16:46:35,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 16:46:35,135 INFO L225 Difference]: With dead ends: 484 [2022-01-31 16:46:35,135 INFO L226 Difference]: Without dead ends: 484 [2022-01-31 16:46:35,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 16:46:35,137 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1398 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1398 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 16:46:35,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1398 Valid, 575 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 16:46:35,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-01-31 16:46:35,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 484. [2022-01-31 16:46:35,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 480 states have (on average 1.3958333333333333) internal successors, (670), 480 states have internal predecessors, (670), 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) [2022-01-31 16:46:35,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 673 transitions. [2022-01-31 16:46:35,155 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 673 transitions. Word has length 196 [2022-01-31 16:46:35,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 16:46:35,156 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 673 transitions. [2022-01-31 16:46:35,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.9285714285714284) internal successors, (385), 97 states have internal predecessors, (385), 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) [2022-01-31 16:46:35,156 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 673 transitions. [2022-01-31 16:46:35,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2022-01-31 16:46:35,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 16:46:35,162 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 16:46:35,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 16:46:35,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:46:35,376 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 16:46:35,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 16:46:35,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1578255596, now seen corresponding path program 5 times [2022-01-31 16:46:35,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 16:46:35,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092004215] [2022-01-31 16:46:35,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:46:35,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 16:46:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:46:38,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 16:46:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:46:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:46:38,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 16:46:38,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092004215] [2022-01-31 16:46:38,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092004215] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 16:46:38,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169169218] [2022-01-31 16:46:38,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 16:46:38,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:46:38,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 16:46:38,577 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) [2022-01-31 16:46:38,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 16:46:39,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 95 check-sat command(s) [2022-01-31 16:46:39,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 16:46:39,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 3356 conjuncts, 96 conjunts are in the unsatisfiable core [2022-01-31 16:46:39,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 16:46:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:46:40,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 16:46:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:46:48,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169169218] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 16:46:48,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 16:46:48,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97, 97] total 194 [2022-01-31 16:46:48,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628629455] [2022-01-31 16:46:48,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 16:46:48,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-01-31 16:46:48,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 16:46:48,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-01-31 16:46:48,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18530, Invalid=18912, Unknown=0, NotChecked=0, Total=37442 [2022-01-31 16:46:48,601 INFO L87 Difference]: Start difference. First operand 484 states and 673 transitions. Second operand has 194 states, 194 states have (on average 3.963917525773196) internal successors, (769), 193 states have internal predecessors, (769), 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) [2022-01-31 16:46:57,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 16:46:57,037 INFO L93 Difference]: Finished difference Result 964 states and 1345 transitions. [2022-01-31 16:46:57,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-01-31 16:46:57,038 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 3.963917525773196) internal successors, (769), 193 states have internal predecessors, (769), 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 388 [2022-01-31 16:46:57,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 16:46:57,041 INFO L225 Difference]: With dead ends: 964 [2022-01-31 16:46:57,041 INFO L226 Difference]: Without dead ends: 964 [2022-01-31 16:46:57,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 874 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=18530, Invalid=18912, Unknown=0, NotChecked=0, Total=37442 [2022-01-31 16:46:57,045 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 3483 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3483 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 16:46:57,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3483 Valid, 1043 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 16:46:57,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2022-01-31 16:46:57,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 964. [2022-01-31 16:46:57,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 960 states have (on average 1.3979166666666667) internal successors, (1342), 960 states have internal predecessors, (1342), 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) [2022-01-31 16:46:57,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1345 transitions. [2022-01-31 16:46:57,065 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1345 transitions. Word has length 388 [2022-01-31 16:46:57,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 16:46:57,066 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 1345 transitions. [2022-01-31 16:46:57,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 3.963917525773196) internal successors, (769), 193 states have internal predecessors, (769), 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) [2022-01-31 16:46:57,067 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1345 transitions. [2022-01-31 16:46:57,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2022-01-31 16:46:57,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 16:46:57,083 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 16:46:57,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 16:46:57,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:46:57,296 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 16:46:57,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 16:46:57,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1316694508, now seen corresponding path program 6 times [2022-01-31 16:46:57,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 16:46:57,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75688032] [2022-01-31 16:46:57,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:46:57,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 16:46:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:47:09,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 16:47:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:47:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 72010 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:47:09,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 16:47:09,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75688032] [2022-01-31 16:47:09,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75688032] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 16:47:09,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956208056] [2022-01-31 16:47:09,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 16:47:09,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:47:09,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 16:47:09,101 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 16:47:09,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 16:47:11,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 191 check-sat command(s) [2022-01-31 16:47:11,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 16:47:11,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 6620 conjuncts, 192 conjunts are in the unsatisfiable core [2022-01-31 16:47:11,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 16:47:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 72010 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:47:12,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 16:47:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 72010 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:47:45,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956208056] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 16:47:45,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 16:47:45,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 193, 193] total 386 [2022-01-31 16:47:45,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974517675] [2022-01-31 16:47:45,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 16:47:45,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 386 states [2022-01-31 16:47:45,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 16:47:45,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 386 interpolants. [2022-01-31 16:47:45,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73922, Invalid=74688, Unknown=0, NotChecked=0, Total=148610 [2022-01-31 16:47:45,478 INFO L87 Difference]: Start difference. First operand 964 states and 1345 transitions. Second operand has 386 states, 386 states have (on average 3.981865284974093) internal successors, (1537), 385 states have internal predecessors, (1537), 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) [2022-01-31 16:49:39,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 16:49:39,344 INFO L93 Difference]: Finished difference Result 1924 states and 2689 transitions. [2022-01-31 16:49:39,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 385 states. [2022-01-31 16:49:39,345 INFO L78 Accepts]: Start accepts. Automaton has has 386 states, 386 states have (on average 3.981865284974093) internal successors, (1537), 385 states have internal predecessors, (1537), 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 772 [2022-01-31 16:49:39,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 16:49:39,352 INFO L225 Difference]: With dead ends: 1924 [2022-01-31 16:49:39,352 INFO L226 Difference]: Without dead ends: 1924 [2022-01-31 16:49:39,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1738 GetRequests, 1354 SyntacticMatches, 0 SemanticMatches, 384 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 42.3s TimeCoverageRelationStatistics Valid=73922, Invalid=74688, Unknown=0, NotChecked=0, Total=148610 [2022-01-31 16:49:39,359 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 8277 mSDsluCounter, 2027 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8277 SdHoareTripleChecker+Valid, 2046 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 16:49:39,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8277 Valid, 2046 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 16:49:39,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2022-01-31 16:49:39,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1924. [2022-01-31 16:49:39,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1920 states have (on average 1.3989583333333333) internal successors, (2686), 1920 states have internal predecessors, (2686), 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) [2022-01-31 16:49:39,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 2689 transitions. [2022-01-31 16:49:39,388 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 2689 transitions. Word has length 772 [2022-01-31 16:49:39,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 16:49:39,389 INFO L470 AbstractCegarLoop]: Abstraction has 1924 states and 2689 transitions. [2022-01-31 16:49:39,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 386 states, 386 states have (on average 3.981865284974093) internal successors, (1537), 385 states have internal predecessors, (1537), 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) [2022-01-31 16:49:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 2689 transitions. [2022-01-31 16:49:39,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1541 [2022-01-31 16:49:39,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 16:49:39,435 INFO L514 BasicCegarLoop]: trace histogram [382, 382, 382, 382, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 16:49:39,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 16:49:39,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-31 16:49:39,648 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 16:49:39,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 16:49:39,648 INFO L85 PathProgramCache]: Analyzing trace with hash 511904788, now seen corresponding path program 7 times [2022-01-31 16:49:39,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 16:49:39,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027541525] [2022-01-31 16:49:39,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:49:39,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 16:49:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:50:25,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 16:50:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:50:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 291466 backedges. 0 proven. 291466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:50:25,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 16:50:25,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027541525] [2022-01-31 16:50:25,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027541525] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 16:50:25,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348846002] [2022-01-31 16:50:25,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 16:50:25,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:50:25,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 16:50:25,627 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 16:50:25,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 16:50:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:50:27,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 13148 conjuncts, 384 conjunts are in the unsatisfiable core [2022-01-31 16:50:27,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 16:50:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 291466 backedges. 0 proven. 291466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:50:30,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 16:52:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 291466 backedges. 0 proven. 291466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:52:43,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348846002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 16:52:43,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 16:52:43,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [386, 385, 385] total 770 [2022-01-31 16:52:43,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894851562] [2022-01-31 16:52:43,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 16:52:43,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 770 states [2022-01-31 16:52:43,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 16:52:43,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 770 interpolants. [2022-01-31 16:52:43,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295298, Invalid=296832, Unknown=0, NotChecked=0, Total=592130 [2022-01-31 16:52:43,152 INFO L87 Difference]: Start difference. First operand 1924 states and 2689 transitions. Second operand has 770 states, 770 states have (on average 3.9909090909090907) internal successors, (3073), 769 states have internal predecessors, (3073), 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)