/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/cohendiv-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 01:45:27,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 01:45:27,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 01:45:27,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 01:45:27,494 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 01:45:27,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 01:45:27,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 01:45:27,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 01:45:27,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 01:45:27,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 01:45:27,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 01:45:27,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 01:45:27,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 01:45:27,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 01:45:27,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 01:45:27,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 01:45:27,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 01:45:27,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 01:45:27,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 01:45:27,507 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 01:45:27,509 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 01:45:27,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 01:45:27,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 01:45:27,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 01:45:27,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 01:45:27,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 01:45:27,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 01:45:27,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 01:45:27,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 01:45:27,522 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 01:45:27,532 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 01:45:27,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 01:45:27,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 01:45:27,534 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 01:45:27,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 01:45:27,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 01:45:27,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 01:45:27,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 01:45:27,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 01:45:27,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 01:45:27,535 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 01:45:27,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 01:45:27,535 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 01:45:27,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 01:45:27,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 01:45:27,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 01:45:27,535 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 01:45:27,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 01:45:27,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 01:45:27,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 01:45:27,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 01:45:27,536 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 01:45:27,537 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 01:45:27,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 01:45:27,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 01:45:27,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 01:45:27,757 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 01:45:27,758 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 01:45:27,759 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound50.c [2022-04-05 01:45:27,805 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3ab40bd3/34dc55b6ff444ab7a5b8ec313a28f632/FLAG301274b28 [2022-04-05 01:45:28,166 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 01:45:28,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound50.c [2022-04-05 01:45:28,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3ab40bd3/34dc55b6ff444ab7a5b8ec313a28f632/FLAG301274b28 [2022-04-05 01:45:28,599 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3ab40bd3/34dc55b6ff444ab7a5b8ec313a28f632 [2022-04-05 01:45:28,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 01:45:28,602 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 01:45:28,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 01:45:28,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 01:45:28,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 01:45:28,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 01:45:28" (1/1) ... [2022-04-05 01:45:28,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12dbd34b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:45:28, skipping insertion in model container [2022-04-05 01:45:28,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 01:45:28" (1/1) ... [2022-04-05 01:45:28,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 01:45:28,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 01:45:28,762 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/cohendiv-ll_unwindbound50.c[576,589] [2022-04-05 01:45:28,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 01:45:28,781 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 01:45:28,790 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/cohendiv-ll_unwindbound50.c[576,589] [2022-04-05 01:45:28,799 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 01:45:28,808 INFO L208 MainTranslator]: Completed translation [2022-04-05 01:45:28,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:45:28 WrapperNode [2022-04-05 01:45:28,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 01:45:28,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 01:45:28,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 01:45:28,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 01:45:28,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:45:28" (1/1) ... [2022-04-05 01:45:28,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:45:28" (1/1) ... [2022-04-05 01:45:28,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:45:28" (1/1) ... [2022-04-05 01:45:28,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:45:28" (1/1) ... [2022-04-05 01:45:28,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:45:28" (1/1) ... [2022-04-05 01:45:28,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:45:28" (1/1) ... [2022-04-05 01:45:28,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:45:28" (1/1) ... [2022-04-05 01:45:28,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 01:45:28,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 01:45:28,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 01:45:28,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 01:45:28,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:45:28" (1/1) ... [2022-04-05 01:45:28,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 01:45:28,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:45:28,866 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 01:45:28,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 01:45:28,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 01:45:28,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 01:45:28,895 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 01:45:28,895 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 01:45:28,896 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 01:45:28,896 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 01:45:28,896 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 01:45:28,896 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 01:45:28,896 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 01:45:28,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 01:45:28,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 01:45:28,897 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 01:45:28,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 01:45:28,897 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 01:45:28,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 01:45:28,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 01:45:28,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 01:45:28,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 01:45:28,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 01:45:28,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 01:45:28,956 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 01:45:28,957 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 01:45:29,074 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 01:45:29,079 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 01:45:29,080 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 01:45:29,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 01:45:29 BoogieIcfgContainer [2022-04-05 01:45:29,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 01:45:29,082 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 01:45:29,082 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 01:45:29,083 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 01:45:29,086 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 01:45:29" (1/1) ... [2022-04-05 01:45:29,087 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 01:45:29,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 01:45:29 BasicIcfg [2022-04-05 01:45:29,111 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 01:45:29,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 01:45:29,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 01:45:29,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 01:45:29,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 01:45:28" (1/4) ... [2022-04-05 01:45:29,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@304f5b8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 01:45:29, skipping insertion in model container [2022-04-05 01:45:29,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:45:28" (2/4) ... [2022-04-05 01:45:29,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@304f5b8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 01:45:29, skipping insertion in model container [2022-04-05 01:45:29,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 01:45:29" (3/4) ... [2022-04-05 01:45:29,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@304f5b8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 01:45:29, skipping insertion in model container [2022-04-05 01:45:29,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 01:45:29" (4/4) ... [2022-04-05 01:45:29,118 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound50.cJordan [2022-04-05 01:45:29,121 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 01:45:29,122 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 01:45:29,152 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 01:45:29,158 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 01:45:29,158 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 01:45:29,171 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 01:45:29,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 01:45:29,178 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:45:29,178 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:45:29,179 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:45:29,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:45:29,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1213541379, now seen corresponding path program 1 times [2022-04-05 01:45:29,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:45:29,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822945314] [2022-04-05 01:45:29,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:29,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:45:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:45:29,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:45:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:45:29,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:45:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:45:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:45:29,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:45:29,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822945314] [2022-04-05 01:45:29,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822945314] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:45:29,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:45:29,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 01:45:29,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157034175] [2022-04-05 01:45:29,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:45:29,409 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 01:45:29,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:45:29,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 01:45:29,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 01:45:29,442 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 01:45:29,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:45:29,545 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-04-05 01:45:29,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 01:45:29,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-05 01:45:29,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:45:29,558 INFO L225 Difference]: With dead ends: 39 [2022-04-05 01:45:29,558 INFO L226 Difference]: Without dead ends: 34 [2022-04-05 01:45:29,560 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 01:45:29,563 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 01:45:29,563 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 01:45:29,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-05 01:45:29,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-04-05 01:45:29,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 01:45:29,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-04-05 01:45:29,596 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2022-04-05 01:45:29,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:45:29,597 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-04-05 01:45:29,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 01:45:29,597 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-04-05 01:45:29,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-05 01:45:29,597 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:45:29,597 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:45:29,598 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 01:45:29,598 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:45:29,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:45:29,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1202035559, now seen corresponding path program 1 times [2022-04-05 01:45:29,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:45:29,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524285550] [2022-04-05 01:45:29,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:29,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:45:29,619 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:45:29,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121963253] [2022-04-05 01:45:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:29,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:45:29,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:45:29,625 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:45:29,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 01:45:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:45:29,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 01:45:29,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:45:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:45:29,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 01:45:29,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:45:29,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524285550] [2022-04-05 01:45:29,769 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:45:29,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121963253] [2022-04-05 01:45:29,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121963253] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:45:29,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:45:29,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 01:45:29,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192570282] [2022-04-05 01:45:29,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:45:29,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 01:45:29,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:45:29,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 01:45:29,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 01:45:29,772 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 01:45:29,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:45:29,784 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-04-05 01:45:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 01:45:29,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-04-05 01:45:29,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:45:29,786 INFO L225 Difference]: With dead ends: 35 [2022-04-05 01:45:29,786 INFO L226 Difference]: Without dead ends: 35 [2022-04-05 01:45:29,786 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 01:45:29,787 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 01:45:29,788 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 01:45:29,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-05 01:45:29,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-05 01:45:29,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 01:45:29,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-04-05 01:45:29,795 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2022-04-05 01:45:29,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:45:29,795 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-04-05 01:45:29,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 01:45:29,795 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-04-05 01:45:29,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-05 01:45:29,796 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:45:29,796 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:45:29,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 01:45:30,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:45:30,012 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:45:30,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:45:30,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1200933292, now seen corresponding path program 1 times [2022-04-05 01:45:30,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:45:30,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874352678] [2022-04-05 01:45:30,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:30,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:45:30,026 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:45:30,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028995896] [2022-04-05 01:45:30,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:30,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:45:30,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:45:30,028 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:45:30,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 01:45:30,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:45:30,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 01:45:30,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:45:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:45:30,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 01:45:30,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:45:30,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874352678] [2022-04-05 01:45:30,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:45:30,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028995896] [2022-04-05 01:45:30,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028995896] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:45:30,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:45:30,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 01:45:30,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108583032] [2022-04-05 01:45:30,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:45:30,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 01:45:30,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:45:30,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 01:45:30,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 01:45:30,164 INFO L87 Difference]: Start difference. First operand 35 states and 44 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 01:45:30,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:45:30,219 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-04-05 01:45:30,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 01:45:30,220 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-05 01:45:30,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:45:30,221 INFO L225 Difference]: With dead ends: 43 [2022-04-05 01:45:30,221 INFO L226 Difference]: Without dead ends: 43 [2022-04-05 01:45:30,221 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 01:45:30,222 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 01:45:30,223 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 145 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 01:45:30,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-05 01:45:30,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-04-05 01:45:30,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 01:45:30,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-04-05 01:45:30,231 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2022-04-05 01:45:30,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:45:30,231 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-04-05 01:45:30,231 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 01:45:30,231 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-04-05 01:45:30,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 01:45:30,232 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:45:30,232 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:45:30,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 01:45:30,454 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,SelfDestructingSolverStorable2 [2022-04-05 01:45:30,454 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:45:30,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:45:30,455 INFO L85 PathProgramCache]: Analyzing trace with hash -944097291, now seen corresponding path program 1 times [2022-04-05 01:45:30,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:45:30,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884807116] [2022-04-05 01:45:30,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:30,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:45:30,468 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:45:30,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879835952] [2022-04-05 01:45:30,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:30,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:45:30,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:45:30,469 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:45:30,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 01:45:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:45:30,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 01:45:30,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:45:30,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:45:30,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 01:45:30,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:45:30,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884807116] [2022-04-05 01:45:30,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:45:30,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879835952] [2022-04-05 01:45:30,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879835952] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:45:30,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:45:30,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 01:45:30,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891867223] [2022-04-05 01:45:30,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:45:30,621 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 01:45:30,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:45:30,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 01:45:30,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 01:45:30,622 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 01:45:30,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:45:30,689 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2022-04-05 01:45:30,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 01:45:30,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 23 [2022-04-05 01:45:30,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:45:30,691 INFO L225 Difference]: With dead ends: 56 [2022-04-05 01:45:30,692 INFO L226 Difference]: Without dead ends: 55 [2022-04-05 01:45:30,692 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 01:45:30,693 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 13 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 01:45:30,693 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 139 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 01:45:30,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-05 01:45:30,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-04-05 01:45:30,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-05 01:45:30,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-04-05 01:45:30,703 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2022-04-05 01:45:30,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:45:30,703 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-04-05 01:45:30,703 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 01:45:30,703 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-04-05 01:45:30,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 01:45:30,704 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:45:30,704 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:45:30,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 01:45:30,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:45:30,915 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:45:30,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:45:30,916 INFO L85 PathProgramCache]: Analyzing trace with hash -653220550, now seen corresponding path program 1 times [2022-04-05 01:45:30,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:45:30,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271491260] [2022-04-05 01:45:30,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:30,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:45:30,931 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:45:30,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342721470] [2022-04-05 01:45:30,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:30,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:45:30,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:45:30,937 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:45:30,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 01:45:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:45:30,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 01:45:30,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:45:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 01:45:31,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 01:45:31,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:45:31,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271491260] [2022-04-05 01:45:31,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:45:31,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342721470] [2022-04-05 01:45:31,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342721470] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:45:31,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:45:31,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 01:45:31,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12007395] [2022-04-05 01:45:31,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:45:31,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 01:45:31,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:45:31,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 01:45:31,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 01:45:31,085 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-05 01:45:31,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:45:31,134 INFO L93 Difference]: Finished difference Result 81 states and 111 transitions. [2022-04-05 01:45:31,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 01:45:31,134 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2022-04-05 01:45:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:45:31,136 INFO L225 Difference]: With dead ends: 81 [2022-04-05 01:45:31,136 INFO L226 Difference]: Without dead ends: 81 [2022-04-05 01:45:31,136 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 01:45:31,137 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 13 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 01:45:31,137 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 145 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 01:45:31,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-05 01:45:31,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2022-04-05 01:45:31,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 states have internal predecessors, (56), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 01:45:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2022-04-05 01:45:31,148 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2022-04-05 01:45:31,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:45:31,148 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2022-04-05 01:45:31,148 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-05 01:45:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2022-04-05 01:45:31,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 01:45:31,149 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:45:31,149 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:45:31,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 01:45:31,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:45:31,375 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:45:31,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:45:31,376 INFO L85 PathProgramCache]: Analyzing trace with hash -830156892, now seen corresponding path program 1 times [2022-04-05 01:45:31,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:45:31,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58105909] [2022-04-05 01:45:31,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:31,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:45:31,386 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:45:31,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194354003] [2022-04-05 01:45:31,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:31,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:45:31,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:45:31,389 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:45:31,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 01:45:31,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:45:31,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 01:45:31,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:45:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 01:45:31,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 01:45:31,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:45:31,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58105909] [2022-04-05 01:45:31,515 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:45:31,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194354003] [2022-04-05 01:45:31,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194354003] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:45:31,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:45:31,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 01:45:31,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104393457] [2022-04-05 01:45:31,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:45:31,516 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 01:45:31,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:45:31,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 01:45:31,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 01:45:31,517 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 01:45:31,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:45:31,542 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2022-04-05 01:45:31,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 01:45:31,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2022-04-05 01:45:31,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:45:31,544 INFO L225 Difference]: With dead ends: 78 [2022-04-05 01:45:31,545 INFO L226 Difference]: Without dead ends: 78 [2022-04-05 01:45:31,545 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 01:45:31,546 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 01:45:31,546 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 135 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 01:45:31,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-04-05 01:45:31,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-04-05 01:45:31,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 01:45:31,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2022-04-05 01:45:31,554 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2022-04-05 01:45:31,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:45:31,554 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2022-04-05 01:45:31,554 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 01:45:31,554 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2022-04-05 01:45:31,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-05 01:45:31,555 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:45:31,555 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:45:31,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 01:45:31,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:45:31,768 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:45:31,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:45:31,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1527688582, now seen corresponding path program 1 times [2022-04-05 01:45:31,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:45:31,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919928435] [2022-04-05 01:45:31,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:31,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:45:31,780 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:45:31,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201785513] [2022-04-05 01:45:31,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:31,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:45:31,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:45:31,784 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:45:31,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 01:45:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:45:31,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 01:45:31,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:45:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 01:45:31,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 01:45:31,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:45:31,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919928435] [2022-04-05 01:45:31,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:45:31,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201785513] [2022-04-05 01:45:31,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201785513] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:45:31,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:45:31,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-05 01:45:31,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244527977] [2022-04-05 01:45:31,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:45:31,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 01:45:31,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:45:31,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 01:45:31,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-04-05 01:45:31,928 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 01:45:32,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:45:32,030 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2022-04-05 01:45:32,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 01:45:32,031 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2022-04-05 01:45:32,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:45:32,033 INFO L225 Difference]: With dead ends: 82 [2022-04-05 01:45:32,033 INFO L226 Difference]: Without dead ends: 82 [2022-04-05 01:45:32,034 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-05 01:45:32,040 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 01:45:32,040 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 167 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 01:45:32,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-05 01:45:32,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-04-05 01:45:32,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 01:45:32,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2022-04-05 01:45:32,048 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2022-04-05 01:45:32,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:45:32,049 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2022-04-05 01:45:32,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 01:45:32,052 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2022-04-05 01:45:32,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 01:45:32,059 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:45:32,060 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:45:32,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 01:45:32,282 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:45:32,282 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:45:32,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:45:32,283 INFO L85 PathProgramCache]: Analyzing trace with hash 800232443, now seen corresponding path program 1 times [2022-04-05 01:45:32,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:45:32,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346359570] [2022-04-05 01:45:32,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:32,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:45:32,293 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:45:32,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997158957] [2022-04-05 01:45:32,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:32,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:45:32,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:45:32,295 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:45:32,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 01:45:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:45:32,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 01:45:32,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:45:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-05 01:45:32,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:45:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-05 01:45:32,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:45:32,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346359570] [2022-04-05 01:45:32,672 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:45:32,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997158957] [2022-04-05 01:45:32,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997158957] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:45:32,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 01:45:32,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-05 01:45:32,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565196434] [2022-04-05 01:45:32,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 01:45:32,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 01:45:32,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:45:32,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 01:45:32,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-04-05 01:45:32,674 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-05 01:45:32,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:45:32,777 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2022-04-05 01:45:32,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 01:45:32,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 47 [2022-04-05 01:45:32,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:45:32,780 INFO L225 Difference]: With dead ends: 86 [2022-04-05 01:45:32,780 INFO L226 Difference]: Without dead ends: 86 [2022-04-05 01:45:32,780 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-04-05 01:45:32,781 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 01:45:32,781 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 109 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 01:45:32,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-05 01:45:32,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-04-05 01:45:32,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 01:45:32,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2022-04-05 01:45:32,803 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2022-04-05 01:45:32,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:45:32,803 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2022-04-05 01:45:32,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-05 01:45:32,804 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2022-04-05 01:45:32,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-05 01:45:32,805 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:45:32,806 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:45:32,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 01:45:33,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:45:33,028 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:45:33,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:45:33,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1984817020, now seen corresponding path program 1 times [2022-04-05 01:45:33,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:45:33,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513282007] [2022-04-05 01:45:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:33,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:45:33,038 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:45:33,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251685596] [2022-04-05 01:45:33,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:33,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:45:33,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:45:33,043 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:45:33,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 01:45:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:45:33,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 01:45:33,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:45:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 01:45:33,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:45:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-05 01:45:33,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:45:33,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513282007] [2022-04-05 01:45:33,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:45:33,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251685596] [2022-04-05 01:45:33,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251685596] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:45:33,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 01:45:33,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-05 01:45:33,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814059930] [2022-04-05 01:45:33,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 01:45:33,326 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 01:45:33,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:45:33,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 01:45:33,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-05 01:45:33,327 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-04-05 01:45:33,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:45:33,467 INFO L93 Difference]: Finished difference Result 250 states and 299 transitions. [2022-04-05 01:45:33,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 01:45:33,467 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 50 [2022-04-05 01:45:33,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:45:33,469 INFO L225 Difference]: With dead ends: 250 [2022-04-05 01:45:33,469 INFO L226 Difference]: Without dead ends: 250 [2022-04-05 01:45:33,469 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-04-05 01:45:33,470 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 90 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 01:45:33,470 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 241 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 01:45:33,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-04-05 01:45:33,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 239. [2022-04-05 01:45:33,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 153 states have (on average 1.1895424836601307) internal successors, (182), 161 states have internal predecessors, (182), 57 states have call successors, (57), 29 states have call predecessors, (57), 28 states have return successors, (52), 48 states have call predecessors, (52), 52 states have call successors, (52) [2022-04-05 01:45:33,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 291 transitions. [2022-04-05 01:45:33,482 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 291 transitions. Word has length 50 [2022-04-05 01:45:33,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:45:33,483 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 291 transitions. [2022-04-05 01:45:33,483 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-04-05 01:45:33,483 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 291 transitions. [2022-04-05 01:45:33,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-05 01:45:33,484 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:45:33,484 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:45:33,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 01:45:33,702 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-05 01:45:33,703 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:45:33,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:45:33,703 INFO L85 PathProgramCache]: Analyzing trace with hash 960315114, now seen corresponding path program 1 times [2022-04-05 01:45:33,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:45:33,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585115083] [2022-04-05 01:45:33,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:33,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:45:33,712 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:45:33,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243831809] [2022-04-05 01:45:33,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:33,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:45:33,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:45:33,714 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:45:33,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 01:45:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:45:33,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-05 01:45:33,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:45:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-05 01:45:34,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:45:34,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:45:34,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585115083] [2022-04-05 01:45:34,296 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:45:34,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243831809] [2022-04-05 01:45:34,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243831809] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 01:45:34,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 01:45:34,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-05 01:45:34,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095961548] [2022-04-05 01:45:34,296 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 01:45:34,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 01:45:34,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:45:34,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 01:45:34,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-04-05 01:45:34,297 INFO L87 Difference]: Start difference. First operand 239 states and 291 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-04-05 01:45:34,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:45:34,486 INFO L93 Difference]: Finished difference Result 218 states and 257 transitions. [2022-04-05 01:45:34,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 01:45:34,487 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2022-04-05 01:45:34,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:45:34,489 INFO L225 Difference]: With dead ends: 218 [2022-04-05 01:45:34,489 INFO L226 Difference]: Without dead ends: 203 [2022-04-05 01:45:34,489 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-04-05 01:45:34,490 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 26 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 01:45:34,490 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 165 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 01:45:34,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-04-05 01:45:34,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-04-05 01:45:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 130 states have (on average 1.1692307692307693) internal successors, (152), 136 states have internal predecessors, (152), 46 states have call successors, (46), 26 states have call predecessors, (46), 25 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2022-04-05 01:45:34,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 240 transitions. [2022-04-05 01:45:34,503 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 240 transitions. Word has length 55 [2022-04-05 01:45:34,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:45:34,506 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 240 transitions. [2022-04-05 01:45:34,506 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-04-05 01:45:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 240 transitions. [2022-04-05 01:45:34,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-05 01:45:34,507 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:45:34,508 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:45:34,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 01:45:34,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-05 01:45:34,719 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:45:34,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:45:34,720 INFO L85 PathProgramCache]: Analyzing trace with hash 136506131, now seen corresponding path program 1 times [2022-04-05 01:45:34,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:45:34,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889356612] [2022-04-05 01:45:34,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:34,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:45:34,729 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:45:34,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185989273] [2022-04-05 01:45:34,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:34,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:45:34,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:45:34,730 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:45:34,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 01:45:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:45:34,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 01:45:34,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:45:34,892 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 01:45:34,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:45:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-05 01:45:35,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:45:35,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889356612] [2022-04-05 01:45:35,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:45:35,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185989273] [2022-04-05 01:45:35,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185989273] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:45:35,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 01:45:35,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-05 01:45:35,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270452086] [2022-04-05 01:45:35,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 01:45:35,015 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 01:45:35,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:45:35,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 01:45:35,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-05 01:45:35,016 INFO L87 Difference]: Start difference. First operand 202 states and 240 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 8 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-04-05 01:45:35,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:45:35,163 INFO L93 Difference]: Finished difference Result 214 states and 246 transitions. [2022-04-05 01:45:35,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 01:45:35,164 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 8 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 63 [2022-04-05 01:45:35,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:45:35,167 INFO L225 Difference]: With dead ends: 214 [2022-04-05 01:45:35,167 INFO L226 Difference]: Without dead ends: 214 [2022-04-05 01:45:35,167 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-04-05 01:45:35,168 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 98 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 01:45:35,168 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 283 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 01:45:35,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-04-05 01:45:35,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2022-04-05 01:45:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 138 states have (on average 1.1304347826086956) internal successors, (156), 142 states have internal predecessors, (156), 46 states have call successors, (46), 26 states have call predecessors, (46), 25 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-04-05 01:45:35,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 244 transitions. [2022-04-05 01:45:35,181 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 244 transitions. Word has length 63 [2022-04-05 01:45:35,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:45:35,181 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 244 transitions. [2022-04-05 01:45:35,181 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 8 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-04-05 01:45:35,181 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 244 transitions. [2022-04-05 01:45:35,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-05 01:45:35,182 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:45:35,182 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:45:35,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 01:45:35,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-05 01:45:35,395 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:45:35,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:45:35,396 INFO L85 PathProgramCache]: Analyzing trace with hash -286098381, now seen corresponding path program 1 times [2022-04-05 01:45:35,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:45:35,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226572486] [2022-04-05 01:45:35,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:35,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:45:35,405 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:45:35,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642105272] [2022-04-05 01:45:35,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:45:35,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:45:35,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:45:35,406 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:45:35,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 01:45:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:45:35,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-05 01:45:35,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:45:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-05 01:45:35,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:45:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-05 01:45:35,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:45:35,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226572486] [2022-04-05 01:45:35,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:45:35,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642105272] [2022-04-05 01:45:35,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642105272] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:45:35,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 01:45:35,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-04-05 01:45:35,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260820202] [2022-04-05 01:45:35,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 01:45:35,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 01:45:35,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:45:35,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 01:45:35,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-04-05 01:45:35,915 INFO L87 Difference]: Start difference. First operand 210 states and 244 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-05 01:45:36,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:45:36,326 INFO L93 Difference]: Finished difference Result 234 states and 268 transitions. [2022-04-05 01:45:36,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 01:45:36,326 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 79 [2022-04-05 01:45:36,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:45:36,326 INFO L225 Difference]: With dead ends: 234 [2022-04-05 01:45:36,326 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 01:45:36,327 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-04-05 01:45:36,327 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 75 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 01:45:36,327 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 185 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 01:45:36,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 01:45:36,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 01:45:36,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-05 01:45:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 01:45:36,328 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2022-04-05 01:45:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:45:36,328 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 01:45:36,328 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-05 01:45:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 01:45:36,328 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 01:45:36,331 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 01:45:36,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 01:45:36,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-05 01:45:36,550 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:45:36,551 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 01:45:36,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 01:45:36 BasicIcfg [2022-04-05 01:45:36,553 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 01:45:36,553 INFO L158 Benchmark]: Toolchain (without parser) took 7951.62ms. Allocated memory was 179.3MB in the beginning and 216.0MB in the end (delta: 36.7MB). Free memory was 130.6MB in the beginning and 178.7MB in the end (delta: -48.1MB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 01:45:36,554 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 179.3MB. Free memory is still 147.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 01:45:36,554 INFO L158 Benchmark]: CACSL2BoogieTranslator took 205.40ms. Allocated memory is still 179.3MB. Free memory was 130.4MB in the beginning and 157.8MB in the end (delta: -27.4MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-05 01:45:36,554 INFO L158 Benchmark]: Boogie Preprocessor took 27.50ms. Allocated memory is still 179.3MB. Free memory was 157.8MB in the beginning and 156.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 01:45:36,554 INFO L158 Benchmark]: RCFGBuilder took 243.94ms. Allocated memory is still 179.3MB. Free memory was 156.0MB in the beginning and 145.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-05 01:45:36,554 INFO L158 Benchmark]: IcfgTransformer took 29.20ms. Allocated memory is still 179.3MB. Free memory was 145.5MB in the beginning and 144.2MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 01:45:36,555 INFO L158 Benchmark]: TraceAbstraction took 7440.61ms. Allocated memory was 179.3MB in the beginning and 216.0MB in the end (delta: 36.7MB). Free memory was 143.8MB in the beginning and 178.7MB in the end (delta: -34.9MB). Peak memory consumption was 2.7MB. Max. memory is 8.0GB. [2022-04-05 01:45:36,556 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 179.3MB. Free memory is still 147.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 205.40ms. Allocated memory is still 179.3MB. Free memory was 130.4MB in the beginning and 157.8MB in the end (delta: -27.4MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.50ms. Allocated memory is still 179.3MB. Free memory was 157.8MB in the beginning and 156.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 243.94ms. Allocated memory is still 179.3MB. Free memory was 156.0MB in the beginning and 145.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 29.20ms. Allocated memory is still 179.3MB. Free memory was 145.5MB in the beginning and 144.2MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 7440.61ms. Allocated memory was 179.3MB in the beginning and 216.0MB in the end (delta: 36.7MB). Free memory was 143.8MB in the beginning and 178.7MB in the end (delta: -34.9MB). Peak memory consumption was 2.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.4s, OverallIterations: 12, TraceHistogramMax: 11, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 409 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 385 mSDsluCounter, 1870 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1342 mSDsCounter, 232 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1166 IncrementalHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 232 mSolverCounterUnsat, 528 mSDtfsCounter, 1166 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 749 GetRequests, 653 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=239occurred in iteration=9, InterpolantAutomatonStates: 88, 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, 12 MinimizatonAttempts, 28 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 476 NumberOfCodeBlocks, 476 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 699 ConstructedInterpolants, 0 QuantifiedInterpolants, 1996 SizeOfPredicates, 29 NumberOfNonLiveVariables, 1473 ConjunctsInSsa, 112 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 861/960 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-04-05 01:45:36,570 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...