/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/loops-crafted-1/nested_delay_nd.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 13:02:52,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 13:02:52,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 13:02:52,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 13:02:52,500 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 13:02:52,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 13:02:52,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 13:02:52,511 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 13:02:52,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 13:02:52,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 13:02:52,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 13:02:52,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 13:02:52,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 13:02:52,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 13:02:52,521 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 13:02:52,522 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 13:02:52,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 13:02:52,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 13:02:52,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 13:02:52,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 13:02:52,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 13:02:52,531 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 13:02:52,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 13:02:52,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 13:02:52,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 13:02:52,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 13:02:52,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 13:02:52,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 13:02:52,545 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 13:02:52,555 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 13:02:52,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 13:02:52,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 13:02:52,557 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 13:02:52,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 13:02:52,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 13:02:52,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 13:02:52,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 13:02:52,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 13:02:52,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 13:02:52,558 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 13:02:52,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 13:02:52,558 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 13:02:52,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 13:02:52,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 13:02:52,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 13:02:52,559 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 13:02:52,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 13:02:52,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 13:02:52,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 13:02:52,559 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 13:02:52,560 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 13:02:52,560 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 13:02:52,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 13:02:52,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 13:02:52,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 13:02:52,726 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 13:02:52,727 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 13:02:52,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c [2022-01-31 13:02:52,778 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe086b8d5/5033531df4a74e21af40ef45f826ea30/FLAG08098b921 [2022-01-31 13:02:53,081 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 13:02:53,082 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c [2022-01-31 13:02:53,094 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe086b8d5/5033531df4a74e21af40ef45f826ea30/FLAG08098b921 [2022-01-31 13:02:53,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe086b8d5/5033531df4a74e21af40ef45f826ea30 [2022-01-31 13:02:53,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 13:02:53,514 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 13:02:53,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 13:02:53,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 13:02:53,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 13:02:53,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:02:53" (1/1) ... [2022-01-31 13:02:53,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@778de725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:02:53, skipping insertion in model container [2022-01-31 13:02:53,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:02:53" (1/1) ... [2022-01-31 13:02:53,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 13:02:53,536 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 13:02:53,649 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c[465,478] [2022-01-31 13:02:53,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 13:02:53,670 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 13:02:53,677 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c[465,478] [2022-01-31 13:02:53,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 13:02:53,688 INFO L208 MainTranslator]: Completed translation [2022-01-31 13:02:53,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:02:53 WrapperNode [2022-01-31 13:02:53,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 13:02:53,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 13:02:53,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 13:02:53,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 13:02:53,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:02:53" (1/1) ... [2022-01-31 13:02:53,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:02:53" (1/1) ... [2022-01-31 13:02:53,700 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:02:53" (1/1) ... [2022-01-31 13:02:53,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:02:53" (1/1) ... [2022-01-31 13:02:53,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:02:53" (1/1) ... [2022-01-31 13:02:53,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:02:53" (1/1) ... [2022-01-31 13:02:53,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:02:53" (1/1) ... [2022-01-31 13:02:53,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 13:02:53,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 13:02:53,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 13:02:53,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 13:02:53,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:02:53" (1/1) ... [2022-01-31 13:02:53,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 13:02:53,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:02:53,761 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 13:02:53,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 13:02:53,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 13:02:53,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 13:02:53,803 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 13:02:53,803 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 13:02:53,804 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 13:02:53,804 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 13:02:53,804 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 13:02:53,804 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 13:02:53,804 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 13:02:53,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 13:02:53,804 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 13:02:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 13:02:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 13:02:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 13:02:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 13:02:53,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 13:02:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 13:02:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 13:02:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 13:02:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 13:02:53,854 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 13:02:53,855 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 13:02:53,971 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 13:02:53,975 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 13:02:53,975 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 13:02:53,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:02:53 BoogieIcfgContainer [2022-01-31 13:02:53,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 13:02:53,977 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 13:02:53,977 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 13:02:53,978 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 13:02:53,980 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:02:53" (1/1) ... [2022-01-31 13:02:53,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 01:02:53 BasicIcfg [2022-01-31 13:02:53,990 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 13:02:53,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 13:02:53,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 13:02:53,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 13:02:53,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 01:02:53" (1/4) ... [2022-01-31 13:02:53,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700667ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:02:53, skipping insertion in model container [2022-01-31 13:02:53,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:02:53" (2/4) ... [2022-01-31 13:02:53,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700667ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:02:53, skipping insertion in model container [2022-01-31 13:02:53,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:02:53" (3/4) ... [2022-01-31 13:02:53,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700667ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 01:02:53, skipping insertion in model container [2022-01-31 13:02:53,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 01:02:53" (4/4) ... [2022-01-31 13:02:53,995 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.cJordan [2022-01-31 13:02:53,998 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 13:02:53,999 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 13:02:54,025 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 13:02:54,029 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 13:02:54,030 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 13:02:54,038 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 13:02:54,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 13:02:54,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:02:54,043 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:02:54,044 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:02:54,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:02:54,047 INFO L85 PathProgramCache]: Analyzing trace with hash -414317756, now seen corresponding path program 1 times [2022-01-31 13:02:54,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:02:54,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353206250] [2022-01-31 13:02:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:02:54,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:02:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:54,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:02:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:54,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:02:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:02:54,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:02:54,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353206250] [2022-01-31 13:02:54,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353206250] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:02:54,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:02:54,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 13:02:54,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121130817] [2022-01-31 13:02:54,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:02:54,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 13:02:54,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:02:54,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 13:02:54,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 13:02:54,252 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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) [2022-01-31 13:02:54,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:02:54,310 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-01-31 13:02:54,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 13:02:54,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 21 [2022-01-31 13:02:54,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:02:54,321 INFO L225 Difference]: With dead ends: 27 [2022-01-31 13:02:54,322 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 13:02:54,323 INFO L932 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 [2022-01-31 13:02:54,327 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:02:54,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:02:54,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 13:02:54,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-31 13:02:54,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 13:02:54,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-01-31 13:02:54,352 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 21 [2022-01-31 13:02:54,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:02:54,353 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-01-31 13:02:54,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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) [2022-01-31 13:02:54,354 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-01-31 13:02:54,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 13:02:54,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:02:54,355 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:02:54,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 13:02:54,355 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:02:54,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:02:54,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1035089572, now seen corresponding path program 1 times [2022-01-31 13:02:54,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:02:54,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85614848] [2022-01-31 13:02:54,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:02:54,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:02:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:54,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:02:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:54,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:02:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:02:54,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:02:54,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85614848] [2022-01-31 13:02:54,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85614848] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:02:54,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:02:54,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 13:02:54,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927569172] [2022-01-31 13:02:54,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:02:54,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 13:02:54,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:02:54,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 13:02:54,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 13:02:54,439 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 13:02:54,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:02:54,508 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-01-31 13:02:54,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 13:02:54,509 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), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-01-31 13:02:54,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:02:54,510 INFO L225 Difference]: With dead ends: 31 [2022-01-31 13:02:54,510 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 13:02:54,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 13:02:54,511 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 39 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:02:54,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 25 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:02:54,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 13:02:54,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-01-31 13:02:54,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 13:02:54,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-01-31 13:02:54,516 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 21 [2022-01-31 13:02:54,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:02:54,516 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-01-31 13:02:54,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 13:02:54,516 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-01-31 13:02:54,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 13:02:54,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:02:54,517 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:02:54,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 13:02:54,517 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:02:54,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:02:54,518 INFO L85 PathProgramCache]: Analyzing trace with hash -2124918270, now seen corresponding path program 1 times [2022-01-31 13:02:54,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:02:54,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729783598] [2022-01-31 13:02:54,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:02:54,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:02:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:54,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:02:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:54,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:02:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 13:02:54,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:02:54,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729783598] [2022-01-31 13:02:54,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729783598] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:02:54,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:02:54,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 13:02:54,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144100324] [2022-01-31 13:02:54,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:02:54,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 13:02:54,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:02:54,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 13:02:54,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 13:02:54,594 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 13:02:54,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:02:54,667 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2022-01-31 13:02:54,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 13:02:54,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 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 24 [2022-01-31 13:02:54,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:02:54,670 INFO L225 Difference]: With dead ends: 33 [2022-01-31 13:02:54,670 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 13:02:54,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 13:02:54,671 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:02:54,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 44 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:02:54,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 13:02:54,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-01-31 13:02:54,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 13:02:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-01-31 13:02:54,677 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2022-01-31 13:02:54,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:02:54,677 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-01-31 13:02:54,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 13:02:54,677 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-01-31 13:02:54,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 13:02:54,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:02:54,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:02:54,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 13:02:54,678 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:02:54,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:02:54,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1237414589, now seen corresponding path program 1 times [2022-01-31 13:02:54,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:02:54,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21084159] [2022-01-31 13:02:54,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:02:54,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:02:54,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:54,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:02:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:54,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:02:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 13:02:54,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:02:54,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21084159] [2022-01-31 13:02:54,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21084159] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:02:54,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:02:54,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 13:02:54,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404648522] [2022-01-31 13:02:54,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:02:54,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 13:02:54,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:02:54,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 13:02:54,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 13:02:54,806 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 13:02:54,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:02:54,891 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2022-01-31 13:02:54,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 13:02:54,892 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-01-31 13:02:54,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:02:54,895 INFO L225 Difference]: With dead ends: 40 [2022-01-31 13:02:54,895 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 13:02:54,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-31 13:02:54,896 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 89 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:02:54,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 36 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:02:54,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 13:02:54,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-31 13:02:54,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 32 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 13:02:54,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-01-31 13:02:54,910 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 24 [2022-01-31 13:02:54,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:02:54,910 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-01-31 13:02:54,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 13:02:54,911 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-01-31 13:02:54,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 13:02:54,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:02:54,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:02:54,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 13:02:54,912 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:02:54,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:02:54,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1236491068, now seen corresponding path program 1 times [2022-01-31 13:02:54,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:02:54,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691589887] [2022-01-31 13:02:54,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:02:54,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:02:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:54,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:02:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:54,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:02:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:02:54,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:02:54,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691589887] [2022-01-31 13:02:54,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691589887] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:02:54,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429054252] [2022-01-31 13:02:54,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:02:54,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:02:54,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:02:54,975 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:02:54,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 13:02:55,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:55,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 13:02:55,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:02:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:02:55,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:02:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:02:55,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429054252] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:02:55,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:02:55,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-31 13:02:55,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59243937] [2022-01-31 13:02:55,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:02:55,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 13:02:55,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:02:55,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 13:02:55,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-01-31 13:02:55,241 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 13:02:55,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:02:55,340 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2022-01-31 13:02:55,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 13:02:55,341 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 24 [2022-01-31 13:02:55,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:02:55,342 INFO L225 Difference]: With dead ends: 59 [2022-01-31 13:02:55,342 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 13:02:55,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-31 13:02:55,346 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 69 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:02:55,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 28 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:02:55,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 13:02:55,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-01-31 13:02:55,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 50 states have internal predecessors, (67), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 13:02:55,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2022-01-31 13:02:55,361 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 24 [2022-01-31 13:02:55,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:02:55,361 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2022-01-31 13:02:55,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 13:02:55,362 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2022-01-31 13:02:55,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 13:02:55,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:02:55,362 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:02:55,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 13:02:55,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:02:55,565 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:02:55,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:02:55,566 INFO L85 PathProgramCache]: Analyzing trace with hash 575066086, now seen corresponding path program 2 times [2022-01-31 13:02:55,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:02:55,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486236963] [2022-01-31 13:02:55,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:02:55,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:02:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:55,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:02:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:55,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:02:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:02:55,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:02:55,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486236963] [2022-01-31 13:02:55,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486236963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:02:55,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425690131] [2022-01-31 13:02:55,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 13:02:55,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:02:55,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:02:55,690 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:02:55,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 13:02:55,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 13:02:55,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:02:55,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 13:02:55,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:02:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 13:02:55,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:02:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 13:02:55,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425690131] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:02:55,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:02:55,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2022-01-31 13:02:55,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625748486] [2022-01-31 13:02:55,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:02:55,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 13:02:55,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:02:55,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 13:02:55,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-31 13:02:55,894 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 13:02:56,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:02:56,166 INFO L93 Difference]: Finished difference Result 110 states and 144 transitions. [2022-01-31 13:02:56,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 13:02:56,167 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-01-31 13:02:56,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:02:56,168 INFO L225 Difference]: With dead ends: 110 [2022-01-31 13:02:56,168 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 13:02:56,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2022-01-31 13:02:56,169 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 153 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:02:56,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 42 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:02:56,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 13:02:56,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2022-01-31 13:02:56,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 87 states have (on average 1.3563218390804597) internal successors, (118), 88 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 13:02:56,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2022-01-31 13:02:56,175 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 33 [2022-01-31 13:02:56,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:02:56,175 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2022-01-31 13:02:56,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 13:02:56,176 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2022-01-31 13:02:56,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 13:02:56,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:02:56,176 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:02:56,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 13:02:56,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-31 13:02:56,392 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:02:56,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:02:56,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1861776890, now seen corresponding path program 1 times [2022-01-31 13:02:56,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:02:56,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955075060] [2022-01-31 13:02:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:02:56,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:02:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:56,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:02:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:56,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:02:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-31 13:02:56,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:02:56,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955075060] [2022-01-31 13:02:56,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955075060] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:02:56,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:02:56,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 13:02:56,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10313219] [2022-01-31 13:02:56,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:02:56,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 13:02:56,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:02:56,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 13:02:56,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 13:02:56,428 INFO L87 Difference]: Start difference. First operand 98 states and 129 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 13:02:56,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:02:56,464 INFO L93 Difference]: Finished difference Result 144 states and 190 transitions. [2022-01-31 13:02:56,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 13:02:56,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 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 39 [2022-01-31 13:02:56,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:02:56,466 INFO L225 Difference]: With dead ends: 144 [2022-01-31 13:02:56,466 INFO L226 Difference]: Without dead ends: 144 [2022-01-31 13:02:56,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 13:02:56,467 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:02:56,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 51 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:02:56,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-31 13:02:56,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 133. [2022-01-31 13:02:56,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 122 states have (on average 1.3360655737704918) internal successors, (163), 123 states have internal predecessors, (163), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 13:02:56,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 174 transitions. [2022-01-31 13:02:56,473 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 174 transitions. Word has length 39 [2022-01-31 13:02:56,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:02:56,473 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 174 transitions. [2022-01-31 13:02:56,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 13:02:56,473 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 174 transitions. [2022-01-31 13:02:56,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 13:02:56,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:02:56,474 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:02:56,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 13:02:56,474 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:02:56,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:02:56,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1666296505, now seen corresponding path program 1 times [2022-01-31 13:02:56,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:02:56,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506239206] [2022-01-31 13:02:56,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:02:56,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:02:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:56,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:02:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:56,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:02:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 13:02:56,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:02:56,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506239206] [2022-01-31 13:02:56,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506239206] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:02:56,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:02:56,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 13:02:56,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941352799] [2022-01-31 13:02:56,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:02:56,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 13:02:56,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:02:56,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 13:02:56,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 13:02:56,503 INFO L87 Difference]: Start difference. First operand 133 states and 174 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 13:02:56,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:02:56,534 INFO L93 Difference]: Finished difference Result 144 states and 188 transitions. [2022-01-31 13:02:56,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 13:02:56,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 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 40 [2022-01-31 13:02:56,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:02:56,535 INFO L225 Difference]: With dead ends: 144 [2022-01-31 13:02:56,535 INFO L226 Difference]: Without dead ends: 144 [2022-01-31 13:02:56,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 13:02:56,536 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:02:56,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 48 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:02:56,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-31 13:02:56,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 137. [2022-01-31 13:02:56,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 126 states have (on average 1.3253968253968254) internal successors, (167), 127 states have internal predecessors, (167), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 13:02:56,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 178 transitions. [2022-01-31 13:02:56,541 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 178 transitions. Word has length 40 [2022-01-31 13:02:56,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:02:56,542 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 178 transitions. [2022-01-31 13:02:56,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 13:02:56,542 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 178 transitions. [2022-01-31 13:02:56,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 13:02:56,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:02:56,542 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:02:56,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 13:02:56,543 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:02:56,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:02:56,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1695849177, now seen corresponding path program 1 times [2022-01-31 13:02:56,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:02:56,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551727912] [2022-01-31 13:02:56,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:02:56,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:02:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:56,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:02:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:56,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:02:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:02:56,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:02:56,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551727912] [2022-01-31 13:02:56,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551727912] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:02:56,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62072007] [2022-01-31 13:02:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:02:56,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:02:56,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:02:56,625 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:02:56,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 13:02:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:56,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 13:02:56,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:02:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:02:56,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:02:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:02:56,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62072007] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:02:56,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:02:56,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-31 13:02:56,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473372928] [2022-01-31 13:02:56,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:02:56,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 13:02:56,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:02:56,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 13:02:56,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2022-01-31 13:02:56,968 INFO L87 Difference]: Start difference. First operand 137 states and 178 transitions. Second operand has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 13:02:57,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:02:57,149 INFO L93 Difference]: Finished difference Result 258 states and 339 transitions. [2022-01-31 13:02:57,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 13:02:57,150 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2022-01-31 13:02:57,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:02:57,151 INFO L225 Difference]: With dead ends: 258 [2022-01-31 13:02:57,151 INFO L226 Difference]: Without dead ends: 258 [2022-01-31 13:02:57,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=399, Invalid=723, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 13:02:57,152 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 147 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:02:57,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 28 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:02:57,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-01-31 13:02:57,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2022-01-31 13:02:57,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 246 states have (on average 1.329268292682927) internal successors, (327), 247 states have internal predecessors, (327), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 13:02:57,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 338 transitions. [2022-01-31 13:02:57,159 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 338 transitions. Word has length 40 [2022-01-31 13:02:57,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:02:57,159 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 338 transitions. [2022-01-31 13:02:57,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 13:02:57,159 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 338 transitions. [2022-01-31 13:02:57,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 13:02:57,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:02:57,160 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:02:57,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-31 13:02:57,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:02:57,379 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:02:57,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:02:57,379 INFO L85 PathProgramCache]: Analyzing trace with hash 150253017, now seen corresponding path program 2 times [2022-01-31 13:02:57,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:02:57,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083824328] [2022-01-31 13:02:57,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:02:57,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:02:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:57,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:02:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:57,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:02:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:57,630 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:02:57,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:02:57,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083824328] [2022-01-31 13:02:57,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083824328] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:02:57,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278845617] [2022-01-31 13:02:57,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 13:02:57,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:02:57,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:02:57,632 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:02:57,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 13:02:57,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 13:02:57,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:02:57,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 13:02:57,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:02:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-01-31 13:02:57,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:02:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-01-31 13:02:58,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278845617] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:02:58,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:02:58,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6, 6] total 26 [2022-01-31 13:02:58,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076684976] [2022-01-31 13:02:58,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:02:58,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 13:02:58,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:02:58,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 13:02:58,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=456, Unknown=0, NotChecked=0, Total=650 [2022-01-31 13:02:58,095 INFO L87 Difference]: Start difference. First operand 257 states and 338 transitions. Second operand has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 13:02:59,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:02:59,076 INFO L93 Difference]: Finished difference Result 1062 states and 1392 transitions. [2022-01-31 13:02:59,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 13:02:59,077 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 64 [2022-01-31 13:02:59,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:02:59,080 INFO L225 Difference]: With dead ends: 1062 [2022-01-31 13:02:59,080 INFO L226 Difference]: Without dead ends: 1062 [2022-01-31 13:02:59,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1752, Invalid=4568, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 13:02:59,082 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 429 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 13:02:59,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 40 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 13:02:59,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-01-31 13:02:59,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 524. [2022-01-31 13:02:59,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 507 states have (on average 1.331360946745562) internal successors, (675), 508 states have internal predecessors, (675), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 13:02:59,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 694 transitions. [2022-01-31 13:02:59,093 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 694 transitions. Word has length 64 [2022-01-31 13:02:59,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:02:59,093 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 694 transitions. [2022-01-31 13:02:59,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 13:02:59,093 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 694 transitions. [2022-01-31 13:02:59,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 13:02:59,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:02:59,094 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:02:59,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 13:02:59,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:02:59,311 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:02:59,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:02:59,312 INFO L85 PathProgramCache]: Analyzing trace with hash -110856328, now seen corresponding path program 1 times [2022-01-31 13:02:59,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:02:59,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264273017] [2022-01-31 13:02:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:02:59,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:02:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:59,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:02:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:59,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:02:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:02:59,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:02:59,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264273017] [2022-01-31 13:02:59,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264273017] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:02:59,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755608211] [2022-01-31 13:02:59,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:02:59,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:02:59,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:02:59,504 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:02:59,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 13:02:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:59,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-31 13:02:59,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:02:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:02:59,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:03:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:03:00,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755608211] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:03:00,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:03:00,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 56 [2022-01-31 13:03:00,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160869106] [2022-01-31 13:03:00,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:03:00,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 13:03:00,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:03:00,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 13:03:00,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1301, Invalid=1779, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 13:03:00,363 INFO L87 Difference]: Start difference. First operand 524 states and 694 transitions. Second operand has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 55 states have internal predecessors, (172), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 13:03:00,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:03:00,864 INFO L93 Difference]: Finished difference Result 3382 states and 4457 transitions. [2022-01-31 13:03:00,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 13:03:00,864 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 55 states have internal predecessors, (172), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 70 [2022-01-31 13:03:00,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:03:00,872 INFO L225 Difference]: With dead ends: 3382 [2022-01-31 13:03:00,873 INFO L226 Difference]: Without dead ends: 3382 [2022-01-31 13:03:00,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1832 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1969, Invalid=3433, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 13:03:00,874 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 308 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 13:03:00,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 32 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 13:03:00,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3382 states. [2022-01-31 13:03:00,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3382 to 1107. [2022-01-31 13:03:00,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1090 states have (on average 1.3293577981651377) internal successors, (1449), 1091 states have internal predecessors, (1449), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 13:03:00,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1468 transitions. [2022-01-31 13:03:00,895 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1468 transitions. Word has length 70 [2022-01-31 13:03:00,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:03:00,895 INFO L470 AbstractCegarLoop]: Abstraction has 1107 states and 1468 transitions. [2022-01-31 13:03:00,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 55 states have internal predecessors, (172), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 13:03:00,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1468 transitions. [2022-01-31 13:03:00,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 13:03:00,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:03:00,897 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:03:00,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 13:03:01,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 13:03:01,113 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:03:01,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:03:01,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1335274040, now seen corresponding path program 2 times [2022-01-31 13:03:01,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:03:01,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660562432] [2022-01-31 13:03:01,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:03:01,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:03:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:03:01,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:03:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:03:01,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:03:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:03:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:03:01,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:03:01,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660562432] [2022-01-31 13:03:01,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660562432] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:03:01,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986375543] [2022-01-31 13:03:01,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 13:03:01,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:03:01,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:03:01,712 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:03:01,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 13:03:01,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 13:03:01,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:03:01,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-31 13:03:01,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:03:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:03:02,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:03:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:03:04,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986375543] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:03:04,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:03:04,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 110 [2022-01-31 13:03:04,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187303695] [2022-01-31 13:03:04,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:03:04,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 13:03:04,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:03:04,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 13:03:04,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5189, Invalid=6801, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 13:03:04,181 INFO L87 Difference]: Start difference. First operand 1107 states and 1468 transitions. Second operand has 110 states, 110 states have (on average 3.036363636363636) internal successors, (334), 109 states have internal predecessors, (334), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 13:03:05,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:03:05,842 INFO L93 Difference]: Finished difference Result 6154 states and 8129 transitions. [2022-01-31 13:03:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 13:03:05,860 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 3.036363636363636) internal successors, (334), 109 states have internal predecessors, (334), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 124 [2022-01-31 13:03:05,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:03:05,875 INFO L225 Difference]: With dead ends: 6154 [2022-01-31 13:03:05,876 INFO L226 Difference]: Without dead ends: 6154 [2022-01-31 13:03:05,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7556 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=7819, Invalid=13351, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 13:03:05,880 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 561 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 13:03:05,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 42 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 13:03:05,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6154 states. [2022-01-31 13:03:05,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6154 to 2295. [2022-01-31 13:03:05,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2278 states have (on average 1.3314310798946445) internal successors, (3033), 2279 states have internal predecessors, (3033), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 13:03:05,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 3052 transitions. [2022-01-31 13:03:05,968 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 3052 transitions. Word has length 124 [2022-01-31 13:03:05,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:03:05,968 INFO L470 AbstractCegarLoop]: Abstraction has 2295 states and 3052 transitions. [2022-01-31 13:03:05,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 3.036363636363636) internal successors, (334), 109 states have internal predecessors, (334), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 13:03:05,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 3052 transitions. [2022-01-31 13:03:05,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-01-31 13:03:05,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:03:05,975 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:03:05,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 13:03:06,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:03:06,192 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:03:06,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:03:06,192 INFO L85 PathProgramCache]: Analyzing trace with hash 872046520, now seen corresponding path program 3 times [2022-01-31 13:03:06,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:03:06,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651637986] [2022-01-31 13:03:06,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:03:06,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:03:06,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:03:07,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:03:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:03:07,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:03:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:03:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:03:07,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:03:07,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651637986] [2022-01-31 13:03:07,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651637986] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:03:07,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571762437] [2022-01-31 13:03:07,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 13:03:07,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:03:07,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:03:07,874 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:03:07,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 13:03:07,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 13:03:07,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:03:07,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 13:03:07,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:03:08,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 7176 trivial. 0 not checked. [2022-01-31 13:03:08,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 13:03:08,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571762437] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:03:08,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 13:03:08,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [75] total 79 [2022-01-31 13:03:08,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204396831] [2022-01-31 13:03:08,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:03:08,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 13:03:08,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:03:08,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 13:03:08,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2642, Invalid=3520, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 13:03:08,310 INFO L87 Difference]: Start difference. First operand 2295 states and 3052 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 13:03:08,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:03:08,366 INFO L93 Difference]: Finished difference Result 1858 states and 2467 transitions. [2022-01-31 13:03:08,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 13:03:08,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 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 232 [2022-01-31 13:03:08,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:03:08,371 INFO L225 Difference]: With dead ends: 1858 [2022-01-31 13:03:08,371 INFO L226 Difference]: Without dead ends: 1858 [2022-01-31 13:03:08,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2646, Invalid=3674, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 13:03:08,372 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:03:08,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 71 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:03:08,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-01-31 13:03:08,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1857. [2022-01-31 13:03:08,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1843 states have (on average 1.3298969072164948) internal successors, (2451), 1844 states have internal predecessors, (2451), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 13:03:08,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2466 transitions. [2022-01-31 13:03:08,391 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2466 transitions. Word has length 232 [2022-01-31 13:03:08,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:03:08,392 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 2466 transitions. [2022-01-31 13:03:08,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 13:03:08,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2466 transitions. [2022-01-31 13:03:08,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-01-31 13:03:08,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:03:08,393 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:03:08,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 13:03:08,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:03:08,620 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:03:08,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:03:08,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1465535191, now seen corresponding path program 1 times [2022-01-31 13:03:08,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:03:08,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994873048] [2022-01-31 13:03:08,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:03:08,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:03:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:03:10,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:03:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:03:10,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:03:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:03:10,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:03:10,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:03:10,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994873048] [2022-01-31 13:03:10,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994873048] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:03:10,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999050775] [2022-01-31 13:03:10,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:03:10,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:03:10,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:03:10,567 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:03:10,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 13:03:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:03:10,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 73 conjunts are in the unsatisfiable core [2022-01-31 13:03:10,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:03:12,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:03:12,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:03:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:03:15,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999050775] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:03:15,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:03:15,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 218 [2022-01-31 13:03:15,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644971518] [2022-01-31 13:03:15,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:03:15,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 218 states [2022-01-31 13:03:15,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:03:15,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2022-01-31 13:03:15,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20741, Invalid=26565, Unknown=0, NotChecked=0, Total=47306 [2022-01-31 13:03:15,979 INFO L87 Difference]: Start difference. First operand 1857 states and 2466 transitions. Second operand has 218 states, 218 states have (on average 3.018348623853211) internal successors, (658), 217 states have internal predecessors, (658), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 13:03:21,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:03:21,941 INFO L93 Difference]: Finished difference Result 3802 states and 5059 transitions. [2022-01-31 13:03:21,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-31 13:03:21,941 INFO L78 Accepts]: Start accepts. Automaton has has 218 states, 218 states have (on average 3.018348623853211) internal successors, (658), 217 states have internal predecessors, (658), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 232 [2022-01-31 13:03:21,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:03:21,950 INFO L225 Difference]: With dead ends: 3802 [2022-01-31 13:03:21,950 INFO L226 Difference]: Without dead ends: 3802 [2022-01-31 13:03:21,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30668 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=31183, Invalid=52627, Unknown=0, NotChecked=0, Total=83810 [2022-01-31 13:03:21,954 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1738 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1739 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 13:03:21,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1739 Valid, 31 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 13:03:21,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3802 states. [2022-01-31 13:03:21,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3802 to 3801. [2022-01-31 13:03:21,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3787 states have (on average 1.3316609453393187) internal successors, (5043), 3788 states have internal predecessors, (5043), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 13:03:21,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 5058 transitions. [2022-01-31 13:03:21,993 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 5058 transitions. Word has length 232 [2022-01-31 13:03:21,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:03:21,993 INFO L470 AbstractCegarLoop]: Abstraction has 3801 states and 5058 transitions. [2022-01-31 13:03:21,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 218 states, 218 states have (on average 3.018348623853211) internal successors, (658), 217 states have internal predecessors, (658), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 13:03:21,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 5058 transitions. [2022-01-31 13:03:21,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2022-01-31 13:03:21,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:03:21,998 INFO L514 BasicCegarLoop]: trace histogram [142, 142, 141, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:03:22,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-31 13:03:22,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 13:03:22,217 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:03:22,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:03:22,217 INFO L85 PathProgramCache]: Analyzing trace with hash -638197545, now seen corresponding path program 2 times [2022-01-31 13:03:22,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:03:22,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904713651] [2022-01-31 13:03:22,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:03:22,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:03:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:03:27,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:03:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:03:27,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:03:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:03:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 30175 backedges. 0 proven. 30175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:03:27,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:03:27,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904713651] [2022-01-31 13:03:27,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904713651] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:03:27,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555169315] [2022-01-31 13:03:27,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 13:03:27,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:03:27,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:03:27,988 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:03:28,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 13:03:28,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 13:03:28,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:03:28,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 145 conjunts are in the unsatisfiable core [2022-01-31 13:03:28,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:03:33,798 INFO L134 CoverageAnalysis]: Checked inductivity of 30175 backedges. 0 proven. 30175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:03:33,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:03:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 30175 backedges. 0 proven. 30175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:03:47,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555169315] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:03:47,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:03:47,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 146, 146] total 434 [2022-01-31 13:03:47,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248136245] [2022-01-31 13:03:47,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:03:47,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 434 states [2022-01-31 13:03:47,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:03:47,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 434 interpolants. [2022-01-31 13:03:47,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82949, Invalid=104973, Unknown=0, NotChecked=0, Total=187922 [2022-01-31 13:03:47,683 INFO L87 Difference]: Start difference. First operand 3801 states and 5058 transitions. Second operand has 434 states, 434 states have (on average 3.0092165898617513) internal successors, (1306), 433 states have internal predecessors, (1306), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 13:04:21,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:04:21,563 INFO L93 Difference]: Finished difference Result 7690 states and 10243 transitions. [2022-01-31 13:04:21,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 291 states. [2022-01-31 13:04:21,571 INFO L78 Accepts]: Start accepts. Automaton has has 434 states, 434 states have (on average 3.0092165898617513) internal successors, (1306), 433 states have internal predecessors, (1306), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 448 [2022-01-31 13:04:21,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:04:21,586 INFO L225 Difference]: With dead ends: 7690 [2022-01-31 13:04:21,586 INFO L226 Difference]: Without dead ends: 7690 [2022-01-31 13:04:21,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1189 GetRequests, 613 SyntacticMatches, 0 SemanticMatches, 576 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123548 ImplicationChecksByTransitivity, 36.1s TimeCoverageRelationStatistics Valid=124567, Invalid=208939, Unknown=0, NotChecked=0, Total=333506 [2022-01-31 13:04:21,600 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4012 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4013 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:04:21,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4013 Valid, 31 Invalid, 2288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [753 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 13:04:21,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7690 states. [2022-01-31 13:04:21,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7690 to 7689. [2022-01-31 13:04:21,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7689 states, 7675 states have (on average 1.3325081433224755) internal successors, (10227), 7676 states have internal predecessors, (10227), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 13:04:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7689 states to 7689 states and 10242 transitions. [2022-01-31 13:04:21,679 INFO L78 Accepts]: Start accepts. Automaton has 7689 states and 10242 transitions. Word has length 448 [2022-01-31 13:04:21,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:04:21,679 INFO L470 AbstractCegarLoop]: Abstraction has 7689 states and 10242 transitions. [2022-01-31 13:04:21,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 434 states, 434 states have (on average 3.0092165898617513) internal successors, (1306), 433 states have internal predecessors, (1306), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 13:04:21,680 INFO L276 IsEmpty]: Start isEmpty. Operand 7689 states and 10242 transitions. [2022-01-31 13:04:21,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 881 [2022-01-31 13:04:21,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:04:21,693 INFO L514 BasicCegarLoop]: trace histogram [286, 286, 285, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:04:21,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 13:04:21,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 13:04:21,908 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:04:21,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:04:21,908 INFO L85 PathProgramCache]: Analyzing trace with hash 878120151, now seen corresponding path program 3 times [2022-01-31 13:04:21,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:04:21,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125819131] [2022-01-31 13:04:21,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:04:21,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:04:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:04:40,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:04:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:04:40,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:04:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:04:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 0 proven. 122551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:04:40,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:04:40,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125819131] [2022-01-31 13:04:40,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125819131] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:04:40,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065167032] [2022-01-31 13:04:40,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 13:04:40,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:04:40,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:04:40,760 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) [2022-01-31 13:04:40,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 13:04:40,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 13:04:40,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:04:40,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 13:04:40,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:04:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 856 proven. 0 refuted. 0 times theorem prover too weak. 121695 trivial. 0 not checked. [2022-01-31 13:04:43,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 13:04:43,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065167032] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:04:43,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 13:04:43,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [291] total 298 [2022-01-31 13:04:43,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280600335] [2022-01-31 13:04:43,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:04:43,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 13:04:43,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:04:43,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 13:04:43,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41640, Invalid=46866, Unknown=0, NotChecked=0, Total=88506 [2022-01-31 13:04:43,263 INFO L87 Difference]: Start difference. First operand 7689 states and 10242 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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) [2022-01-31 13:04:43,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:04:43,413 INFO L93 Difference]: Finished difference Result 10245 states and 13643 transitions. [2022-01-31 13:04:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 13:04:43,414 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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 880 [2022-01-31 13:04:43,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:04:43,451 INFO L225 Difference]: With dead ends: 10245 [2022-01-31 13:04:43,451 INFO L226 Difference]: Without dead ends: 10245 [2022-01-31 13:04:43,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1173 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2599 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=41644, Invalid=47458, Unknown=0, NotChecked=0, Total=89102 [2022-01-31 13:04:43,455 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:04:43,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 95 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:04:43,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10245 states. [2022-01-31 13:04:43,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10245 to 10241. [2022-01-31 13:04:43,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10241 states, 10220 states have (on average 1.3322896281800392) internal successors, (13616), 10224 states have internal predecessors, (13616), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 13:04:43,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10241 states to 10241 states and 13639 transitions. [2022-01-31 13:04:43,606 INFO L78 Accepts]: Start accepts. Automaton has 10241 states and 13639 transitions. Word has length 880 [2022-01-31 13:04:43,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:04:43,608 INFO L470 AbstractCegarLoop]: Abstraction has 10241 states and 13639 transitions. [2022-01-31 13:04:43,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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) [2022-01-31 13:04:43,608 INFO L276 IsEmpty]: Start isEmpty. Operand 10241 states and 13639 transitions. [2022-01-31 13:04:43,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 881 [2022-01-31 13:04:43,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:04:43,625 INFO L514 BasicCegarLoop]: trace histogram [286, 286, 270, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:04:43,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 13:04:43,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 13:04:43,865 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:04:43,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:04:43,866 INFO L85 PathProgramCache]: Analyzing trace with hash -207718695, now seen corresponding path program 1 times [2022-01-31 13:04:43,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:04:43,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388197882] [2022-01-31 13:04:43,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:04:43,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:04:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:05:09,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:05:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:05:09,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:05:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:05:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 0 proven. 122551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:05:09,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:05:09,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388197882] [2022-01-31 13:05:09,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388197882] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:05:09,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241075956] [2022-01-31 13:05:09,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:05:09,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:05:09,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:05:09,640 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) [2022-01-31 13:05:09,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 13:05:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:05:09,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 1785 conjuncts, 289 conjunts are in the unsatisfiable core [2022-01-31 13:05:09,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:05:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 0 proven. 122551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:05:31,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:06:23,118 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 0 proven. 122551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:06:23,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241075956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:06:23,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:06:23,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [291, 290, 290] total 866 [2022-01-31 13:06:23,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040229240] [2022-01-31 13:06:23,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:06:23,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 866 states [2022-01-31 13:06:23,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:06:23,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 866 interpolants. [2022-01-31 13:06:23,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331781, Invalid=417309, Unknown=0, NotChecked=0, Total=749090 [2022-01-31 13:06:23,195 INFO L87 Difference]: Start difference. First operand 10241 states and 13639 transitions. Second operand has 866 states, 866 states have (on average 3.004618937644342) internal successors, (2602), 865 states have internal predecessors, (2602), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 13:13:32,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:13:32,020 INFO L93 Difference]: Finished difference Result 20609 states and 27463 transitions. [2022-01-31 13:13:32,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 579 states. [2022-01-31 13:13:32,021 INFO L78 Accepts]: Start accepts. Automaton has has 866 states, 866 states have (on average 3.004618937644342) internal successors, (2602), 865 states have internal predecessors, (2602), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 880 [2022-01-31 13:13:32,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:13:32,050 INFO L225 Difference]: With dead ends: 20609 [2022-01-31 13:13:32,050 INFO L226 Difference]: Without dead ends: 20609 [2022-01-31 13:13:32,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2341 GetRequests, 1189 SyntacticMatches, 0 SemanticMatches, 1152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495932 ImplicationChecksByTransitivity, 156.3s TimeCoverageRelationStatistics Valid=497959, Invalid=832603, Unknown=0, NotChecked=0, Total=1330562 [2022-01-31 13:13:32,135 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 7064 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 3163 mSolverCounterSat, 892 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7065 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 4055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 892 IncrementalHoareTripleChecker+Valid, 3163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 13:13:32,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7065 Valid, 44 Invalid, 4055 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [892 Valid, 3163 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 13:13:32,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20609 states. [2022-01-31 13:13:32,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20609 to 20609. [2022-01-31 13:13:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20609 states, 20588 states have (on average 1.332815232174082) internal successors, (27440), 20592 states have internal predecessors, (27440), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 13:13:32,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20609 states to 20609 states and 27463 transitions. [2022-01-31 13:13:32,425 INFO L78 Accepts]: Start accepts. Automaton has 20609 states and 27463 transitions. Word has length 880 [2022-01-31 13:13:32,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:13:32,426 INFO L470 AbstractCegarLoop]: Abstraction has 20609 states and 27463 transitions. [2022-01-31 13:13:32,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 866 states, 866 states have (on average 3.004618937644342) internal successors, (2602), 865 states have internal predecessors, (2602), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 13:13:32,427 INFO L276 IsEmpty]: Start isEmpty. Operand 20609 states and 27463 transitions. [2022-01-31 13:13:32,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1745 [2022-01-31 13:13:32,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:13:32,446 INFO L514 BasicCegarLoop]: trace histogram [574, 574, 558, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:13:32,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 13:13:32,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-31 13:13:32,659 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:13:32,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:13:32,660 INFO L85 PathProgramCache]: Analyzing trace with hash -441769255, now seen corresponding path program 2 times [2022-01-31 13:13:32,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:13:32,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535897430] [2022-01-31 13:13:32,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:13:32,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:13:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:14:47,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:14:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:14:47,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:14:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:14:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 493927 backedges. 0 proven. 493927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:14:47,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:14:47,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535897430] [2022-01-31 13:14:47,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535897430] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:14:47,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554862248] [2022-01-31 13:14:47,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 13:14:47,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:14:47,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:14:47,234 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:14:47,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 13:14:47,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 13:14:47,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:14:47,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 3513 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-31 13:14:47,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:14:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 493927 backedges. 0 proven. 28275 refuted. 0 times theorem prover too weak. 465652 trivial. 0 not checked. [2022-01-31 13:14:53,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:14:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 493927 backedges. 0 proven. 28275 refuted. 0 times theorem prover too weak. 465652 trivial. 0 not checked. [2022-01-31 13:14:59,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554862248] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:14:59,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:14:59,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [579, 22, 22] total 618 [2022-01-31 13:14:59,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195431533] [2022-01-31 13:14:59,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:14:59,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 618 states [2022-01-31 13:14:59,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:14:59,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 618 interpolants. [2022-01-31 13:14:59,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186290, Invalid=195016, Unknown=0, NotChecked=0, Total=381306 [2022-01-31 13:14:59,925 INFO L87 Difference]: Start difference. First operand 20609 states and 27463 transitions. Second operand has 618 states, 618 states have (on average 3.0064724919093853) internal successors, (1858), 617 states have internal predecessors, (1858), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5)