/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/mod3.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 09:54:26,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 09:54:26,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 09:54:26,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 09:54:26,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 09:54:26,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 09:54:26,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 09:54:26,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 09:54:26,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 09:54:26,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 09:54:26,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 09:54:26,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 09:54:26,077 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 09:54:26,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 09:54:26,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 09:54:26,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 09:54:26,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 09:54:26,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 09:54:26,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 09:54:26,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 09:54:26,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 09:54:26,095 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 09:54:26,121 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 09:54:26,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 09:54:26,122 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 09:54:26,122 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 09:54:26,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 09:54:26,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 09:54:26,123 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 09:54:26,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 09:54:26,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 09:54:26,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 09:54:26,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 09:54:26,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 09:54:26,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 09:54:26,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 09:54:26,125 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 09:54:26,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 09:54:26,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 09:54:26,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 09:54:26,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 09:54:26,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 09:54:26,125 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 09:54:26,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 09:54:26,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 09:54:26,126 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 09:54:26,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 09:54:26,126 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 09:54:26,126 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 09:54:26,126 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 09:54:26,127 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 09:54:26,127 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 09:54:26,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 09:54:26,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 09:54:26,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 09:54:26,351 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 09:54:26,352 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 09:54:26,352 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/mod3.c.v+cfa-reducer.c [2022-04-06 09:54:26,398 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de1bd0ad5/5781d15c2697412abc78a46d14385860/FLAG9fc252c76 [2022-04-06 09:54:26,763 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 09:54:26,763 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/mod3.c.v+cfa-reducer.c [2022-04-06 09:54:26,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de1bd0ad5/5781d15c2697412abc78a46d14385860/FLAG9fc252c76 [2022-04-06 09:54:26,780 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de1bd0ad5/5781d15c2697412abc78a46d14385860 [2022-04-06 09:54:26,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 09:54:26,783 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 09:54:26,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 09:54:26,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 09:54:26,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 09:54:26,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:54:26" (1/1) ... [2022-04-06 09:54:26,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3220ea12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:54:26, skipping insertion in model container [2022-04-06 09:54:26,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:54:26" (1/1) ... [2022-04-06 09:54:26,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 09:54:26,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 09:54:26,985 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/mod3.c.v+cfa-reducer.c[1250,1263] [2022-04-06 09:54:26,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 09:54:26,996 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 09:54:27,008 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/mod3.c.v+cfa-reducer.c[1250,1263] [2022-04-06 09:54:27,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 09:54:27,018 INFO L208 MainTranslator]: Completed translation [2022-04-06 09:54:27,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:54:27 WrapperNode [2022-04-06 09:54:27,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 09:54:27,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 09:54:27,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 09:54:27,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 09:54:27,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:54:27" (1/1) ... [2022-04-06 09:54:27,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:54:27" (1/1) ... [2022-04-06 09:54:27,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:54:27" (1/1) ... [2022-04-06 09:54:27,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:54:27" (1/1) ... [2022-04-06 09:54:27,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:54:27" (1/1) ... [2022-04-06 09:54:27,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:54:27" (1/1) ... [2022-04-06 09:54:27,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:54:27" (1/1) ... [2022-04-06 09:54:27,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 09:54:27,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 09:54:27,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 09:54:27,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 09:54:27,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:54:27" (1/1) ... [2022-04-06 09:54:27,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 09:54:27,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:54:27,068 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 09:54:27,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 09:54:27,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 09:54:27,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 09:54:27,100 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 09:54:27,100 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 09:54:27,100 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 09:54:27,101 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 09:54:27,101 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 09:54:27,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 09:54:27,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 09:54:27,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 09:54:27,101 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 09:54:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 09:54:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 09:54:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 09:54:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 09:54:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 09:54:27,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 09:54:27,149 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 09:54:27,150 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 09:54:31,557 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 09:54:31,561 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 09:54:31,561 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-04-06 09:54:31,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:54:31 BoogieIcfgContainer [2022-04-06 09:54:31,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 09:54:31,563 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 09:54:31,563 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 09:54:31,564 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 09:54:31,566 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:54:31" (1/1) ... [2022-04-06 09:54:31,567 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 09:54:31,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 09:54:31 BasicIcfg [2022-04-06 09:54:31,578 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 09:54:31,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 09:54:31,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 09:54:31,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 09:54:31,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:54:26" (1/4) ... [2022-04-06 09:54:31,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a755aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:54:31, skipping insertion in model container [2022-04-06 09:54:31,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:54:27" (2/4) ... [2022-04-06 09:54:31,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a755aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:54:31, skipping insertion in model container [2022-04-06 09:54:31,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:54:31" (3/4) ... [2022-04-06 09:54:31,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a755aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 09:54:31, skipping insertion in model container [2022-04-06 09:54:31,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 09:54:31" (4/4) ... [2022-04-06 09:54:31,584 INFO L111 eAbstractionObserver]: Analyzing ICFG mod3.c.v+cfa-reducer.cqvasr [2022-04-06 09:54:31,588 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 09:54:31,588 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 09:54:31,638 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 09:54:31,648 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 09:54:31,649 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 09:54:31,661 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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) [2022-04-06 09:54:31,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 09:54:31,664 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:54:31,664 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:54:31,665 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:54:31,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:54:31,668 INFO L85 PathProgramCache]: Analyzing trace with hash -963747291, now seen corresponding path program 1 times [2022-04-06 09:54:31,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:54:31,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260695927] [2022-04-06 09:54:31,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:54:31,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:54:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:31,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:54:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:54:31,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:54:31,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260695927] [2022-04-06 09:54:31,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260695927] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:54:31,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 09:54:31,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 09:54:31,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075329870] [2022-04-06 09:54:31,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:54:31,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 09:54:31,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:54:31,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 09:54:31,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 09:54:31,944 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-04-06 09:54:33,993 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 09:54:36,150 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 09:54:38,336 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 09:54:40,506 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 09:54:40,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:54:40,685 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-04-06 09:54:40,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 09:54:40,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 11 [2022-04-06 09:54:40,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:54:40,693 INFO L225 Difference]: With dead ends: 36 [2022-04-06 09:54:40,693 INFO L226 Difference]: Without dead ends: 20 [2022-04-06 09:54:40,695 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 09:54:40,698 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-04-06 09:54:40,699 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 31 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 4 Unknown, 0 Unchecked, 8.7s Time] [2022-04-06 09:54:40,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-06 09:54:40,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-04-06 09:54:40,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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) [2022-04-06 09:54:40,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-04-06 09:54:40,725 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2022-04-06 09:54:40,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:54:40,726 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-04-06 09:54:40,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-04-06 09:54:40,726 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-04-06 09:54:40,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 09:54:40,727 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:54:40,727 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:54:40,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 09:54:40,727 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:54:40,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:54:40,728 INFO L85 PathProgramCache]: Analyzing trace with hash -92546851, now seen corresponding path program 1 times [2022-04-06 09:54:40,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:54:40,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137031428] [2022-04-06 09:54:40,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:54:40,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:54:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:41,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:54:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:54:41,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:54:41,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137031428] [2022-04-06 09:54:41,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137031428] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:54:41,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446162234] [2022-04-06 09:54:41,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:54:41,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:54:41,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:54:41,095 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:54:41,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process