/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 06:18:28,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 06:18:28,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 06:18:28,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 06:18:28,722 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 06:18:28,723 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 06:18:28,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 06:18:28,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 06:18:28,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 06:18:28,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 06:18:28,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 06:18:28,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 06:18:28,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 06:18:28,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 06:18:28,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 06:18:28,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 06:18:28,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 06:18:28,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 06:18:28,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 06:18:28,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 06:18:28,739 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 06:18:28,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 06:18:28,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 06:18:28,743 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 06:18:28,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 06:18:28,745 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 06:18:28,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 06:18:28,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 06:18:28,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 06:18:28,753 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 06:18:28,759 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 06:18:28,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 06:18:28,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 06:18:28,761 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 06:18:28,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 06:18:28,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 06:18:28,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 06:18:28,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 06:18:28,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 06:18:28,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 06:18:28,762 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 06:18:28,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 06:18:28,762 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 06:18:28,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 06:18:28,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 06:18:28,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 06:18:28,762 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 06:18:28,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 06:18:28,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 06:18:28,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 06:18:28,764 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 06:18:28,765 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 06:18:28,765 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 06:18:28,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 06:18:28,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 06:18:28,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 06:18:28,966 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 06:18:28,966 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 06:18:28,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound2.c [2022-03-20 06:18:29,019 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e61e5dbc/67678c57bf1f4c3f841c3ca7d44edfd9/FLAG2c9e4b604 [2022-03-20 06:18:29,346 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 06:18:29,347 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound2.c [2022-03-20 06:18:29,351 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e61e5dbc/67678c57bf1f4c3f841c3ca7d44edfd9/FLAG2c9e4b604 [2022-03-20 06:18:29,362 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e61e5dbc/67678c57bf1f4c3f841c3ca7d44edfd9 [2022-03-20 06:18:29,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 06:18:29,364 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 06:18:29,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 06:18:29,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 06:18:29,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 06:18:29,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:18:29" (1/1) ... [2022-03-20 06:18:29,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ce5d7a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:18:29, skipping insertion in model container [2022-03-20 06:18:29,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:18:29" (1/1) ... [2022-03-20 06:18:29,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 06:18:29,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 06:18:29,507 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound2.c[526,539] [2022-03-20 06:18:29,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 06:18:29,536 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 06:18:29,566 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound2.c[526,539] [2022-03-20 06:18:29,580 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 06:18:29,592 INFO L208 MainTranslator]: Completed translation [2022-03-20 06:18:29,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:18:29 WrapperNode [2022-03-20 06:18:29,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 06:18:29,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 06:18:29,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 06:18:29,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 06:18:29,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:18:29" (1/1) ... [2022-03-20 06:18:29,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:18:29" (1/1) ... [2022-03-20 06:18:29,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:18:29" (1/1) ... [2022-03-20 06:18:29,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:18:29" (1/1) ... [2022-03-20 06:18:29,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:18:29" (1/1) ... [2022-03-20 06:18:29,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:18:29" (1/1) ... [2022-03-20 06:18:29,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:18:29" (1/1) ... [2022-03-20 06:18:29,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 06:18:29,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 06:18:29,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 06:18:29,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 06:18:29,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:18:29" (1/1) ... [2022-03-20 06:18:29,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 06:18:29,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:29,653 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 06:18:29,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 06:18:29,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 06:18:29,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 06:18:29,678 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 06:18:29,678 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 06:18:29,679 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 06:18:29,679 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 06:18:29,679 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 06:18:29,679 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 06:18:29,679 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 06:18:29,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 06:18:29,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 06:18:29,679 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 06:18:29,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 06:18:29,679 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 06:18:29,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 06:18:29,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 06:18:29,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 06:18:29,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 06:18:29,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 06:18:29,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 06:18:29,726 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 06:18:29,727 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 06:18:29,868 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 06:18:29,875 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 06:18:29,875 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 06:18:29,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:18:29 BoogieIcfgContainer [2022-03-20 06:18:29,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 06:18:29,877 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 06:18:29,877 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 06:18:29,878 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 06:18:29,880 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:18:29" (1/1) ... [2022-03-20 06:18:29,882 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 06:18:29,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 06:18:29 BasicIcfg [2022-03-20 06:18:29,895 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 06:18:29,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 06:18:29,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 06:18:29,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 06:18:29,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 06:18:29" (1/4) ... [2022-03-20 06:18:29,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2558e43b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:18:29, skipping insertion in model container [2022-03-20 06:18:29,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:18:29" (2/4) ... [2022-03-20 06:18:29,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2558e43b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:18:29, skipping insertion in model container [2022-03-20 06:18:29,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:18:29" (3/4) ... [2022-03-20 06:18:29,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2558e43b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 06:18:29, skipping insertion in model container [2022-03-20 06:18:29,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 06:18:29" (4/4) ... [2022-03-20 06:18:29,900 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound2.cJordan [2022-03-20 06:18:29,904 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 06:18:29,904 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 06:18:29,933 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 06:18:29,938 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 06:18:29,938 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 06:18:29,947 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 06:18:29,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 06:18:29,953 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:29,953 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:29,954 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:29,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:29,958 INFO L85 PathProgramCache]: Analyzing trace with hash 121155216, now seen corresponding path program 1 times [2022-03-20 06:18:29,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:29,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549501328] [2022-03-20 06:18:29,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:29,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:30,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:18:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:30,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:18:30,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:30,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549501328] [2022-03-20 06:18:30,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549501328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:18:30,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:18:30,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 06:18:30,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935167147] [2022-03-20 06:18:30,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:18:30,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 06:18:30,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:30,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 06:18:30,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 06:18:30,181 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 06:18:30,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:30,274 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2022-03-20 06:18:30,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 06:18:30,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 06:18:30,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:30,288 INFO L225 Difference]: With dead ends: 32 [2022-03-20 06:18:30,288 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 06:18:30,289 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 06:18:30,292 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:30,295 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:18:30,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 06:18:30,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-20 06:18:30,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 06:18:30,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-03-20 06:18:30,331 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2022-03-20 06:18:30,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:30,331 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-03-20 06:18:30,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 06:18:30,332 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-03-20 06:18:30,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 06:18:30,333 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:30,333 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:30,333 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 06:18:30,333 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:30,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:30,336 INFO L85 PathProgramCache]: Analyzing trace with hash 152644303, now seen corresponding path program 1 times [2022-03-20 06:18:30,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:30,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115130995] [2022-03-20 06:18:30,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:30,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:30,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:18:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:18:30,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:30,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115130995] [2022-03-20 06:18:30,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115130995] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:18:30,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:18:30,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 06:18:30,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229888711] [2022-03-20 06:18:30,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:18:30,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 06:18:30,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:30,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 06:18:30,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:18:30,471 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 06:18:30,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:30,624 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2022-03-20 06:18:30,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 06:18:30,625 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 06:18:30,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:30,626 INFO L225 Difference]: With dead ends: 39 [2022-03-20 06:18:30,627 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 06:18:30,630 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:18:30,633 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:30,634 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 91 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:18:30,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 06:18:30,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-03-20 06:18:30,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 06:18:30,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-20 06:18:30,649 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-03-20 06:18:30,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:30,650 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-20 06:18:30,650 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 06:18:30,653 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-20 06:18:30,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 06:18:30,657 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:30,657 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:30,657 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 06:18:30,657 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:30,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:30,658 INFO L85 PathProgramCache]: Analyzing trace with hash -400958603, now seen corresponding path program 1 times [2022-03-20 06:18:30,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:30,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572424759] [2022-03-20 06:18:30,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:30,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:30,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:30,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:18:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:18:30,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:30,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572424759] [2022-03-20 06:18:30,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572424759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:18:30,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:18:30,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 06:18:30,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074049685] [2022-03-20 06:18:30,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:18:30,718 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:18:30,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:30,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:18:30,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:18:30,719 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 06:18:30,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:30,796 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-03-20 06:18:30,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 06:18:30,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-20 06:18:30,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:30,798 INFO L225 Difference]: With dead ends: 32 [2022-03-20 06:18:30,798 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 06:18:30,798 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:18:30,799 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:30,799 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:18:30,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 06:18:30,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 06:18:30,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 06:18:30,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-20 06:18:30,809 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2022-03-20 06:18:30,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:30,809 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-20 06:18:30,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 06:18:30,810 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-20 06:18:30,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 06:18:30,810 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:30,811 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:30,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 06:18:30,811 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:30,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:30,812 INFO L85 PathProgramCache]: Analyzing trace with hash 185978583, now seen corresponding path program 1 times [2022-03-20 06:18:30,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:30,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325386492] [2022-03-20 06:18:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:30,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:30,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:18:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:30,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 06:18:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:18:30,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:30,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325386492] [2022-03-20 06:18:30,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325386492] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:18:30,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:18:30,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 06:18:30,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431827524] [2022-03-20 06:18:30,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:18:30,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 06:18:30,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:30,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 06:18:30,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:18:30,899 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 06:18:31,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:31,000 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-03-20 06:18:31,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 06:18:31,001 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-03-20 06:18:31,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:31,003 INFO L225 Difference]: With dead ends: 44 [2022-03-20 06:18:31,003 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 06:18:31,004 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:18:31,009 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:31,011 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:18:31,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 06:18:31,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2022-03-20 06:18:31,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 06:18:31,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-03-20 06:18:31,025 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2022-03-20 06:18:31,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:31,025 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-03-20 06:18:31,026 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 06:18:31,026 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-03-20 06:18:31,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 06:18:31,026 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:31,026 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:31,026 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 06:18:31,027 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:31,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:31,027 INFO L85 PathProgramCache]: Analyzing trace with hash -820589269, now seen corresponding path program 1 times [2022-03-20 06:18:31,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:31,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007986261] [2022-03-20 06:18:31,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:31,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:31,038 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:18:31,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100477099] [2022-03-20 06:18:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:31,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:31,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:31,052 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:18:31,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 06:18:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:31,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 06:18:31,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:18:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 06:18:31,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:18:31,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:31,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007986261] [2022-03-20 06:18:31,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:18:31,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100477099] [2022-03-20 06:18:31,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100477099] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:18:31,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:18:31,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 06:18:31,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416430819] [2022-03-20 06:18:31,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:18:31,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:18:31,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:31,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:18:31,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:18:31,288 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 06:18:31,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:31,321 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2022-03-20 06:18:31,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:18:31,321 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 06:18:31,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:31,324 INFO L225 Difference]: With dead ends: 51 [2022-03-20 06:18:31,324 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 06:18:31,324 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:18:31,325 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:31,325 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:18:31,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 06:18:31,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-03-20 06:18:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 06:18:31,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-20 06:18:31,329 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2022-03-20 06:18:31,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:31,329 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-20 06:18:31,329 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 06:18:31,329 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-20 06:18:31,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 06:18:31,330 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:31,330 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:31,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 06:18:31,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:31,540 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:31,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:31,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1259710898, now seen corresponding path program 1 times [2022-03-20 06:18:31,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:31,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310523621] [2022-03-20 06:18:31,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:31,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:31,549 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:18:31,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150374603] [2022-03-20 06:18:31,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:31,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:31,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:31,553 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:18:31,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 06:18:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:31,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 06:18:31,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:18:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 06:18:31,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:18:31,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:31,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310523621] [2022-03-20 06:18:31,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:18:31,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150374603] [2022-03-20 06:18:31,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150374603] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:18:31,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:18:31,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 06:18:31,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638467419] [2022-03-20 06:18:31,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:18:31,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:18:31,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:31,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:18:31,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:18:31,716 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:18:31,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:31,738 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2022-03-20 06:18:31,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:18:31,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-20 06:18:31,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:31,740 INFO L225 Difference]: With dead ends: 63 [2022-03-20 06:18:31,741 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 06:18:31,741 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:18:31,742 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:31,742 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:18:31,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 06:18:31,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-20 06:18:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 06:18:31,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-03-20 06:18:31,754 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2022-03-20 06:18:31,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:31,754 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-03-20 06:18:31,754 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:18:31,754 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-03-20 06:18:31,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 06:18:31,755 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:31,755 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:31,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 06:18:31,974 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-20 06:18:31,974 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:31,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:31,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1260813165, now seen corresponding path program 1 times [2022-03-20 06:18:31,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:31,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187250100] [2022-03-20 06:18:31,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:31,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:31,982 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:18:31,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465001759] [2022-03-20 06:18:31,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:31,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:31,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:31,986 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:18:32,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 06:18:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:32,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 06:18:32,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:18:32,161 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 06:18:32,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:18:32,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:32,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187250100] [2022-03-20 06:18:32,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:18:32,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465001759] [2022-03-20 06:18:32,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465001759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:18:32,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:18:32,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 06:18:32,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93144628] [2022-03-20 06:18:32,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:18:32,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:18:32,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:32,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:18:32,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:18:32,163 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:18:32,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:32,205 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-03-20 06:18:32,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:18:32,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-20 06:18:32,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:32,207 INFO L225 Difference]: With dead ends: 74 [2022-03-20 06:18:32,207 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 06:18:32,208 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:18:32,208 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:32,209 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:18:32,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 06:18:32,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-20 06:18:32,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 06:18:32,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-03-20 06:18:32,227 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2022-03-20 06:18:32,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:32,227 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-03-20 06:18:32,228 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:18:32,228 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-03-20 06:18:32,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 06:18:32,232 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:32,232 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:32,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 06:18:32,433 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:32,433 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:32,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:32,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1811137592, now seen corresponding path program 1 times [2022-03-20 06:18:32,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:32,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958214602] [2022-03-20 06:18:32,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:32,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:32,440 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:18:32,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788058616] [2022-03-20 06:18:32,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:32,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:32,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:32,442 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:18:32,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 06:18:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:32,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 06:18:32,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:18:32,541 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-20 06:18:32,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:18:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 06:18:32,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:32,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958214602] [2022-03-20 06:18:32,634 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:18:32,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788058616] [2022-03-20 06:18:32,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788058616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:18:32,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:18:32,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-03-20 06:18:32,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169164856] [2022-03-20 06:18:32,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:18:32,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:18:32,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:32,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:18:32,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:18:32,636 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 06:18:32,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:32,662 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2022-03-20 06:18:32,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 06:18:32,663 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 37 [2022-03-20 06:18:32,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:32,664 INFO L225 Difference]: With dead ends: 65 [2022-03-20 06:18:32,665 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 06:18:32,665 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:18:32,665 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:32,665 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 126 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:18:32,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 06:18:32,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-20 06:18:32,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 06:18:32,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2022-03-20 06:18:32,682 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 37 [2022-03-20 06:18:32,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:32,682 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2022-03-20 06:18:32,682 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 06:18:32,682 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2022-03-20 06:18:32,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 06:18:32,683 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:32,683 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:32,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 06:18:32,894 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:32,894 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:32,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:32,895 INFO L85 PathProgramCache]: Analyzing trace with hash -599722260, now seen corresponding path program 1 times [2022-03-20 06:18:32,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:32,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964979108] [2022-03-20 06:18:32,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:32,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:32,911 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:18:32,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433281655] [2022-03-20 06:18:32,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:32,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:32,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:32,918 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:18:32,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 06:18:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:32,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 06:18:32,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:18:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 06:18:33,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:18:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 06:18:33,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:33,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964979108] [2022-03-20 06:18:33,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:18:33,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433281655] [2022-03-20 06:18:33,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433281655] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 06:18:33,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 06:18:33,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 06:18:33,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567602765] [2022-03-20 06:18:33,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:18:33,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:18:33,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:33,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:18:33,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 06:18:33,173 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:18:33,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:33,203 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2022-03-20 06:18:33,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:18:33,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-03-20 06:18:33,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:33,205 INFO L225 Difference]: With dead ends: 76 [2022-03-20 06:18:33,205 INFO L226 Difference]: Without dead ends: 76 [2022-03-20 06:18:33,205 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 06:18:33,207 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:33,207 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 113 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:18:33,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-20 06:18:33,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2022-03-20 06:18:33,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 49 states have internal predecessors, (56), 17 states have call successors, (17), 10 states have call predecessors, (17), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 06:18:33,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2022-03-20 06:18:33,213 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 40 [2022-03-20 06:18:33,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:33,214 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2022-03-20 06:18:33,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:18:33,214 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2022-03-20 06:18:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 06:18:33,215 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:33,215 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:33,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 06:18:33,421 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:33,422 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:33,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:33,422 INFO L85 PathProgramCache]: Analyzing trace with hash 560903707, now seen corresponding path program 1 times [2022-03-20 06:18:33,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:33,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489840346] [2022-03-20 06:18:33,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:33,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:33,429 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:18:33,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384778168] [2022-03-20 06:18:33,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:33,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:33,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:33,430 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:18:33,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 06:18:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 06:18:33,471 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 06:18:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 06:18:33,518 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 06:18:33,518 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 06:18:33,519 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 06:18:33,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 06:18:33,721 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:33,724 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:33,726 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 06:18:33,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 06:18:33 BasicIcfg [2022-03-20 06:18:33,749 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 06:18:33,749 INFO L158 Benchmark]: Toolchain (without parser) took 4384.87ms. Allocated memory was 186.6MB in the beginning and 259.0MB in the end (delta: 72.4MB). Free memory was 130.5MB in the beginning and 186.3MB in the end (delta: -55.8MB). Peak memory consumption was 17.3MB. Max. memory is 8.0GB. [2022-03-20 06:18:33,750 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 186.6MB. Free memory is still 146.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 06:18:33,750 INFO L158 Benchmark]: CACSL2BoogieTranslator took 227.15ms. Allocated memory was 186.6MB in the beginning and 259.0MB in the end (delta: 72.4MB). Free memory was 130.2MB in the beginning and 232.4MB in the end (delta: -102.1MB). Peak memory consumption was 13.3MB. Max. memory is 8.0GB. [2022-03-20 06:18:33,750 INFO L158 Benchmark]: Boogie Preprocessor took 33.85ms. Allocated memory is still 259.0MB. Free memory was 232.4MB in the beginning and 230.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 06:18:33,750 INFO L158 Benchmark]: RCFGBuilder took 248.90ms. Allocated memory is still 259.0MB. Free memory was 230.8MB in the beginning and 218.7MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 06:18:33,750 INFO L158 Benchmark]: IcfgTransformer took 17.67ms. Allocated memory is still 259.0MB. Free memory was 218.7MB in the beginning and 217.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 06:18:33,751 INFO L158 Benchmark]: TraceAbstraction took 3853.21ms. Allocated memory is still 259.0MB. Free memory was 217.1MB in the beginning and 186.3MB in the end (delta: 30.8MB). Peak memory consumption was 31.3MB. Max. memory is 8.0GB. [2022-03-20 06:18:33,752 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 186.6MB. Free memory is still 146.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 227.15ms. Allocated memory was 186.6MB in the beginning and 259.0MB in the end (delta: 72.4MB). Free memory was 130.2MB in the beginning and 232.4MB in the end (delta: -102.1MB). Peak memory consumption was 13.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.85ms. Allocated memory is still 259.0MB. Free memory was 232.4MB in the beginning and 230.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 248.90ms. Allocated memory is still 259.0MB. Free memory was 230.8MB in the beginning and 218.7MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 17.67ms. Allocated memory is still 259.0MB. Free memory was 218.7MB in the beginning and 217.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 3853.21ms. Allocated memory is still 259.0MB. Free memory was 217.1MB in the beginning and 186.3MB in the end (delta: 30.8MB). Peak memory consumption was 31.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=4, counter=0] [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [\old(counter)=0, A=1, B=1, counter=0, d=1, p=1, q=0, r=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=1, B=1, counter=1, counter++=0, d=1, p=1, q=0, r=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=1, B=1, counter=1, d=2, p=2, q=0, r=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=1, B=1, counter=2, counter++=1, d=2, p=2, q=0, r=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L38] COND TRUE !(r >= d) VAL [\old(counter)=0, A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L44] EXPR counter++ VAL [\old(counter)=0, A=1, B=1, counter=3, counter++=2, d=2, p=2, q=0, r=1] [L44] COND FALSE !(counter++<2) [L58] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L58] RET __VERIFIER_assert(A == d*q + r) VAL [\old(counter)=0, A=1, B=1, counter=3, d=2, p=2, q=0, r=1] [L59] CALL __VERIFIER_assert(B == d) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.8s, OverallIterations: 10, TraceHistogramMax: 8, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 113 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 92 mSDsluCounter, 889 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 573 mSDsCounter, 55 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 382 IncrementalHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 55 mSolverCounterUnsat, 316 mSDtfsCounter, 382 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 225 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=9, InterpolantAutomatonStates: 51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 23 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 267 NumberOfCodeBlocks, 267 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 280 ConstructedInterpolants, 0 QuantifiedInterpolants, 742 SizeOfPredicates, 7 NumberOfNonLiveVariables, 565 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 215/224 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-20 06:18:33,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...