/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 06:16:59,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 06:16:59,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 06:16:59,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 06:16:59,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 06:16:59,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 06:16:59,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 06:16:59,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 06:16:59,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 06:16:59,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 06:16:59,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 06:16:59,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 06:16:59,697 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 06:16:59,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 06:16:59,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 06:16:59,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 06:16:59,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 06:16:59,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 06:16:59,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 06:16:59,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 06:16:59,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 06:16:59,740 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 06:16:59,748 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 06:16:59,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 06:16:59,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 06:16:59,750 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 06:16:59,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 06:16:59,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 06:16:59,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 06:16:59,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 06:16:59,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 06:16:59,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 06:16:59,751 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 06:16:59,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 06:16:59,751 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 06:16:59,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 06:16:59,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 06:16:59,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 06:16:59,752 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 06:16:59,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 06:16:59,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 06:16:59,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 06:16:59,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 06:16:59,753 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 06:16:59,753 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 06:16:59,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 06:17:00,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 06:17:00,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 06:17:00,013 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 06:17:00,014 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 06:17:00,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound10.c [2022-03-20 06:17:00,082 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1774bd338/b02ad4e869644ae486f8a54e6c9226e8/FLAG3888cc3a8 [2022-03-20 06:17:00,441 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 06:17:00,442 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound10.c [2022-03-20 06:17:00,446 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1774bd338/b02ad4e869644ae486f8a54e6c9226e8/FLAG3888cc3a8 [2022-03-20 06:17:00,481 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1774bd338/b02ad4e869644ae486f8a54e6c9226e8 [2022-03-20 06:17:00,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 06:17:00,485 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 06:17:00,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 06:17:00,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 06:17:00,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 06:17:00,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:17:00" (1/1) ... [2022-03-20 06:17:00,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c23a66a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:17:00, skipping insertion in model container [2022-03-20 06:17:00,493 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:17:00" (1/1) ... [2022-03-20 06:17:00,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 06:17:00,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 06:17:00,677 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound10.c[526,539] [2022-03-20 06:17:00,699 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 06:17:00,706 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 06:17:00,719 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound10.c[526,539] [2022-03-20 06:17:00,737 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 06:17:00,748 INFO L208 MainTranslator]: Completed translation [2022-03-20 06:17:00,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:17:00 WrapperNode [2022-03-20 06:17:00,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 06:17:00,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 06:17:00,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 06:17:00,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 06:17:00,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:17:00" (1/1) ... [2022-03-20 06:17:00,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:17:00" (1/1) ... [2022-03-20 06:17:00,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:17:00" (1/1) ... [2022-03-20 06:17:00,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:17:00" (1/1) ... [2022-03-20 06:17:00,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:17:00" (1/1) ... [2022-03-20 06:17:00,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:17:00" (1/1) ... [2022-03-20 06:17:00,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:17:00" (1/1) ... [2022-03-20 06:17:00,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 06:17:00,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 06:17:00,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 06:17:00,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 06:17:00,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:17:00" (1/1) ... [2022-03-20 06:17:00,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 06:17:00,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:17:00,824 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 06:17:00,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 06:17:00,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 06:17:00,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 06:17:00,863 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 06:17:00,863 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 06:17:00,863 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 06:17:00,863 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 06:17:00,863 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 06:17:00,864 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 06:17:00,864 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 06:17:00,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 06:17:00,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 06:17:00,864 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 06:17:00,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 06:17:00,865 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 06:17:00,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 06:17:00,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 06:17:00,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 06:17:00,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 06:17:00,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 06:17:00,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 06:17:00,920 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 06:17:00,921 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 06:17:01,026 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 06:17:01,031 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 06:17:01,032 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 06:17:01,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:17:01 BoogieIcfgContainer [2022-03-20 06:17:01,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 06:17:01,034 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 06:17:01,034 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 06:17:01,035 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 06:17:01,037 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:17:01" (1/1) ... [2022-03-20 06:17:01,039 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 06:17:01,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 06:17:01 BasicIcfg [2022-03-20 06:17:01,053 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 06:17:01,054 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 06:17:01,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 06:17:01,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 06:17:01,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 06:17:00" (1/4) ... [2022-03-20 06:17:01,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ff9d13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:17:01, skipping insertion in model container [2022-03-20 06:17:01,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:17:00" (2/4) ... [2022-03-20 06:17:01,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ff9d13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:17:01, skipping insertion in model container [2022-03-20 06:17:01,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:17:01" (3/4) ... [2022-03-20 06:17:01,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ff9d13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 06:17:01, skipping insertion in model container [2022-03-20 06:17:01,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 06:17:01" (4/4) ... [2022-03-20 06:17:01,059 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound10.cJordan [2022-03-20 06:17:01,064 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 06:17:01,064 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 06:17:01,097 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 06:17:01,103 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 06:17:01,103 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 06:17:01,114 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 06:17:01,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 06:17:01,120 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:17:01,120 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:17:01,121 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:17:01,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:17:01,125 INFO L85 PathProgramCache]: Analyzing trace with hash 121155216, now seen corresponding path program 1 times [2022-03-20 06:17:01,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:17:01,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277564584] [2022-03-20 06:17:01,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:01,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:17:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:17:01,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:17:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:17:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:17:01,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:17:01,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277564584] [2022-03-20 06:17:01,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277564584] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:17:01,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:17:01,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 06:17:01,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031994764] [2022-03-20 06:17:01,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:17:01,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 06:17:01,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:17:01,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 06:17:01,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 06:17:01,377 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 06:17:01,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:17:01,487 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2022-03-20 06:17:01,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 06:17:01,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 06:17:01,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:17:01,495 INFO L225 Difference]: With dead ends: 32 [2022-03-20 06:17:01,495 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 06:17:01,496 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 06:17:01,499 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:17:01,500 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:17:01,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 06:17:01,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-20 06:17:01,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 06:17:01,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-03-20 06:17:01,526 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2022-03-20 06:17:01,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:17:01,527 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-03-20 06:17:01,527 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 06:17:01,527 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-03-20 06:17:01,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 06:17:01,528 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:17:01,528 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:17:01,528 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 06:17:01,528 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:17:01,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:17:01,529 INFO L85 PathProgramCache]: Analyzing trace with hash 152644303, now seen corresponding path program 1 times [2022-03-20 06:17:01,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:17:01,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583611866] [2022-03-20 06:17:01,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:01,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:17:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:17:01,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:17:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:17:01,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:17:01,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:17:01,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583611866] [2022-03-20 06:17:01,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583611866] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:17:01,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:17:01,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 06:17:01,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552545735] [2022-03-20 06:17:01,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:17:01,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 06:17:01,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:17:01,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 06:17:01,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:17:01,655 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 06:17:01,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:17:01,876 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2022-03-20 06:17:01,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 06:17:01,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 06:17:01,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:17:01,878 INFO L225 Difference]: With dead ends: 39 [2022-03-20 06:17:01,878 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 06:17:01,879 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:17:01,880 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:17:01,880 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 91 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:17:01,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 06:17:01,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-03-20 06:17:01,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 06:17:01,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-20 06:17:01,887 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-03-20 06:17:01,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:17:01,887 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-20 06:17:01,888 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 06:17:01,888 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-20 06:17:01,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 06:17:01,888 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:17:01,888 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:17:01,889 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 06:17:01,889 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:17:01,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:17:01,890 INFO L85 PathProgramCache]: Analyzing trace with hash -400958603, now seen corresponding path program 1 times [2022-03-20 06:17:01,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:17:01,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428116761] [2022-03-20 06:17:01,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:01,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:17:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:17:01,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:17:01,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:17:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:17:01,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:17:01,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428116761] [2022-03-20 06:17:01,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428116761] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:17:01,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:17:01,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 06:17:01,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877530326] [2022-03-20 06:17:01,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:17:01,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:17:01,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:17:01,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:17:01,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:17:01,969 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 06:17:02,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:17:02,062 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-03-20 06:17:02,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 06:17:02,063 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-20 06:17:02,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:17:02,067 INFO L225 Difference]: With dead ends: 32 [2022-03-20 06:17:02,068 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 06:17:02,068 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:17:02,074 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:17:02,075 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:17:02,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 06:17:02,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 06:17:02,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 06:17:02,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-20 06:17:02,088 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2022-03-20 06:17:02,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:17:02,089 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-20 06:17:02,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 06:17:02,089 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-20 06:17:02,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 06:17:02,090 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:17:02,090 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:17:02,090 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 06:17:02,090 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:17:02,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:17:02,091 INFO L85 PathProgramCache]: Analyzing trace with hash 185978583, now seen corresponding path program 1 times [2022-03-20 06:17:02,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:17:02,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086273206] [2022-03-20 06:17:02,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:02,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:17:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:17:02,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:17:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:17:02,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 06:17:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:17:02,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:17:02,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:17:02,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086273206] [2022-03-20 06:17:02,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086273206] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:17:02,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:17:02,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 06:17:02,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643336382] [2022-03-20 06:17:02,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:17:02,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 06:17:02,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:17:02,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 06:17:02,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:17:02,199 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 06:17:02,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:17:02,339 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-03-20 06:17:02,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 06:17:02,340 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-03-20 06:17:02,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:17:02,344 INFO L225 Difference]: With dead ends: 44 [2022-03-20 06:17:02,344 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 06:17:02,345 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:17:02,353 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:17:02,355 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:17:02,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 06:17:02,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2022-03-20 06:17:02,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 06:17:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-03-20 06:17:02,363 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2022-03-20 06:17:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:17:02,363 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-03-20 06:17:02,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 06:17:02,364 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-03-20 06:17:02,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 06:17:02,364 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:17:02,364 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:17:02,364 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 06:17:02,364 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:17:02,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:17:02,365 INFO L85 PathProgramCache]: Analyzing trace with hash -820589269, now seen corresponding path program 1 times [2022-03-20 06:17:02,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:17:02,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453125423] [2022-03-20 06:17:02,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:02,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:17:02,390 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:17:02,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943442082] [2022-03-20 06:17:02,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:02,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:17:02,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:17:02,396 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:17:02,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 06:17:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:17:02,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 06:17:02,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:17:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 06:17:02,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:17:02,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:17:02,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453125423] [2022-03-20 06:17:02,677 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:17:02,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943442082] [2022-03-20 06:17:02,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943442082] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:17:02,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:17:02,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 06:17:02,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507947993] [2022-03-20 06:17:02,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:17:02,678 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:17:02,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:17:02,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:17:02,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:17:02,679 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 06:17:02,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:17:02,733 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2022-03-20 06:17:02,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:17:02,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 06:17:02,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:17:02,736 INFO L225 Difference]: With dead ends: 51 [2022-03-20 06:17:02,736 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 06:17:02,736 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:17:02,738 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:17:02,740 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:17:02,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 06:17:02,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-03-20 06:17:02,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 06:17:02,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-20 06:17:02,755 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2022-03-20 06:17:02,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:17:02,755 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-20 06:17:02,756 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 06:17:02,756 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-20 06:17:02,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 06:17:02,757 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:17:02,757 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:17:02,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 06:17:02,971 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:17:02,972 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:17:02,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:17:02,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1259710898, now seen corresponding path program 1 times [2022-03-20 06:17:02,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:17:02,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618638563] [2022-03-20 06:17:02,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:02,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:17:02,985 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:17:02,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29836877] [2022-03-20 06:17:02,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:02,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:17:02,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:17:03,016 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:17:03,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 06:17:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:17:03,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 06:17:03,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:17:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 06:17:03,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:17:03,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:17:03,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618638563] [2022-03-20 06:17:03,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:17:03,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29836877] [2022-03-20 06:17:03,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29836877] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:17:03,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:17:03,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 06:17:03,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17262114] [2022-03-20 06:17:03,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:17:03,178 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:17:03,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:17:03,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:17:03,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:17:03,179 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:17:03,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:17:03,200 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2022-03-20 06:17:03,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:17:03,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-20 06:17:03,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:17:03,202 INFO L225 Difference]: With dead ends: 63 [2022-03-20 06:17:03,202 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 06:17:03,202 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:17:03,203 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:17:03,203 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:17:03,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 06:17:03,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-20 06:17:03,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 06:17:03,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-03-20 06:17:03,229 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2022-03-20 06:17:03,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:17:03,230 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-03-20 06:17:03,230 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:17:03,230 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-03-20 06:17:03,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 06:17:03,231 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:17:03,231 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:17:03,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 06:17:03,432 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-20 06:17:03,432 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:17:03,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:17:03,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1260813165, now seen corresponding path program 1 times [2022-03-20 06:17:03,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:17:03,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726756491] [2022-03-20 06:17:03,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:03,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:17:03,444 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:17:03,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832879983] [2022-03-20 06:17:03,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:03,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:17:03,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:17:03,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:17:03,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 06:17:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:17:03,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 06:17:03,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:17:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 06:17:03,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:17:03,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:17:03,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726756491] [2022-03-20 06:17:03,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:17:03,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832879983] [2022-03-20 06:17:03,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832879983] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:17:03,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:17:03,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 06:17:03,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858004589] [2022-03-20 06:17:03,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:17:03,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:17:03,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:17:03,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:17:03,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:17:03,690 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:17:03,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:17:03,728 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-03-20 06:17:03,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:17:03,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-20 06:17:03,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:17:03,730 INFO L225 Difference]: With dead ends: 74 [2022-03-20 06:17:03,730 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 06:17:03,730 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:17:03,731 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:17:03,731 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:17:03,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 06:17:03,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-20 06:17:03,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 06:17:03,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-03-20 06:17:03,737 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2022-03-20 06:17:03,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:17:03,737 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-03-20 06:17:03,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:17:03,737 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-03-20 06:17:03,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 06:17:03,738 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:17:03,738 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:17:03,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 06:17:03,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:17:03,948 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:17:03,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:17:03,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1811137592, now seen corresponding path program 1 times [2022-03-20 06:17:03,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:17:03,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79895229] [2022-03-20 06:17:03,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:03,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:17:03,962 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:17:03,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505255196] [2022-03-20 06:17:03,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:03,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:17:03,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:17:03,965 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:17:03,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 06:17:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:17:04,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 06:17:04,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:17:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-20 06:17:04,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:17:04,196 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 06:17:04,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:17:04,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79895229] [2022-03-20 06:17:04,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:17:04,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505255196] [2022-03-20 06:17:04,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505255196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:17:04,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:17:04,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 06:17:04,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927214389] [2022-03-20 06:17:04,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:17:04,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 06:17:04,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:17:04,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 06:17:04,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 06:17:04,198 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 06:17:04,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:17:04,258 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2022-03-20 06:17:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 06:17:04,258 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 37 [2022-03-20 06:17:04,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:17:04,260 INFO L225 Difference]: With dead ends: 119 [2022-03-20 06:17:04,261 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 06:17:04,261 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-20 06:17:04,261 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 41 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:17:04,262 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 152 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:17:04,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 06:17:04,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2022-03-20 06:17:04,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 74 states have internal predecessors, (86), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 06:17:04,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2022-03-20 06:17:04,269 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 37 [2022-03-20 06:17:04,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:17:04,269 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2022-03-20 06:17:04,269 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 06:17:04,269 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2022-03-20 06:17:04,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 06:17:04,270 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:17:04,270 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:17:04,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 06:17:04,490 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:17:04,491 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:17:04,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:17:04,491 INFO L85 PathProgramCache]: Analyzing trace with hash -599722260, now seen corresponding path program 1 times [2022-03-20 06:17:04,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:17:04,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038330681] [2022-03-20 06:17:04,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:04,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:17:04,498 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:17:04,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859073435] [2022-03-20 06:17:04,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:04,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:17:04,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:17:04,516 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:17:04,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 06:17:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:17:04,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 06:17:04,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:17:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 06:17:04,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:17:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 06:17:04,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:17:04,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038330681] [2022-03-20 06:17:04,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:17:04,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859073435] [2022-03-20 06:17:04,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859073435] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 06:17:04,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 06:17:04,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 06:17:04,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494792062] [2022-03-20 06:17:04,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:17:04,922 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:17:04,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:17:04,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:17:04,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 06:17:04,923 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:17:04,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:17:04,958 INFO L93 Difference]: Finished difference Result 127 states and 150 transitions. [2022-03-20 06:17:04,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:17:04,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-03-20 06:17:04,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:17:04,960 INFO L225 Difference]: With dead ends: 127 [2022-03-20 06:17:04,960 INFO L226 Difference]: Without dead ends: 125 [2022-03-20 06:17:04,960 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 06:17:04,960 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:17:04,961 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 113 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:17:04,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-20 06:17:04,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2022-03-20 06:17:04,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 81 states have internal predecessors, (92), 27 states have call successors, (27), 18 states have call predecessors, (27), 16 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 06:17:04,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2022-03-20 06:17:04,967 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 40 [2022-03-20 06:17:04,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:17:04,967 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2022-03-20 06:17:04,967 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:17:04,967 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2022-03-20 06:17:04,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 06:17:04,968 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:17:04,968 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:17:04,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 06:17:05,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:17:05,184 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:17:05,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:17:05,184 INFO L85 PathProgramCache]: Analyzing trace with hash 560903707, now seen corresponding path program 1 times [2022-03-20 06:17:05,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:17:05,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579191529] [2022-03-20 06:17:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:05,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:17:05,191 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:17:05,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733337489] [2022-03-20 06:17:05,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:05,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:17:05,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:17:05,193 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:17:05,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 06:17:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:17:05,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 06:17:05,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:17:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 06:17:05,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:17:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 06:17:05,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:17:05,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579191529] [2022-03-20 06:17:05,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:17:05,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733337489] [2022-03-20 06:17:05,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733337489] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:17:05,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:17:05,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 06:17:05,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149027577] [2022-03-20 06:17:05,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:17:05,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 06:17:05,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:17:05,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 06:17:05,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:17:05,466 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 06:17:05,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:17:05,576 INFO L93 Difference]: Finished difference Result 224 states and 267 transitions. [2022-03-20 06:17:05,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 06:17:05,578 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 53 [2022-03-20 06:17:05,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:17:05,581 INFO L225 Difference]: With dead ends: 224 [2022-03-20 06:17:05,581 INFO L226 Difference]: Without dead ends: 224 [2022-03-20 06:17:05,582 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-03-20 06:17:05,582 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 82 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:17:05,583 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 233 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:17:05,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-20 06:17:05,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 217. [2022-03-20 06:17:05,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 139 states have (on average 1.1942446043165467) internal successors, (166), 148 states have internal predecessors, (166), 51 states have call successors, (51), 28 states have call predecessors, (51), 26 states have return successors, (46), 40 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-20 06:17:05,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 263 transitions. [2022-03-20 06:17:05,609 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 263 transitions. Word has length 53 [2022-03-20 06:17:05,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:17:05,609 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 263 transitions. [2022-03-20 06:17:05,609 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 06:17:05,609 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 263 transitions. [2022-03-20 06:17:05,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 06:17:05,613 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:17:05,613 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:17:05,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 06:17:05,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:17:05,828 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:17:05,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:17:05,828 INFO L85 PathProgramCache]: Analyzing trace with hash -453219492, now seen corresponding path program 1 times [2022-03-20 06:17:05,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:17:05,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674625807] [2022-03-20 06:17:05,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:05,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:17:05,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:17:05,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890815048] [2022-03-20 06:17:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:05,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:17:05,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:17:05,838 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) [2022-03-20 06:17:05,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 06:17:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:17:05,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 06:17:05,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:17:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 06:17:06,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:17:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 06:17:07,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:17:07,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674625807] [2022-03-20 06:17:07,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:17:07,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890815048] [2022-03-20 06:17:07,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890815048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:17:07,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:17:07,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 06:17:07,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117680378] [2022-03-20 06:17:07,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:17:07,174 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 06:17:07,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:17:07,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 06:17:07,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:17:07,175 INFO L87 Difference]: Start difference. First operand 217 states and 263 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-20 06:17:14,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:17:14,653 INFO L93 Difference]: Finished difference Result 310 states and 393 transitions. [2022-03-20 06:17:14,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 06:17:14,653 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 62 [2022-03-20 06:17:14,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:17:14,657 INFO L225 Difference]: With dead ends: 310 [2022-03-20 06:17:14,657 INFO L226 Difference]: Without dead ends: 303 [2022-03-20 06:17:14,658 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=50, Invalid=131, Unknown=1, NotChecked=0, Total=182 [2022-03-20 06:17:14,658 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 52 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 06:17:14,658 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 292 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 06:17:14,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-03-20 06:17:14,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2022-03-20 06:17:14,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 185 states have (on average 1.2324324324324325) internal successors, (228), 191 states have internal predecessors, (228), 58 states have call successors, (58), 31 states have call predecessors, (58), 30 states have return successors, (55), 51 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 06:17:14,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 341 transitions. [2022-03-20 06:17:14,668 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 341 transitions. Word has length 62 [2022-03-20 06:17:14,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:17:14,669 INFO L478 AbstractCegarLoop]: Abstraction has 274 states and 341 transitions. [2022-03-20 06:17:14,669 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-20 06:17:14,669 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 341 transitions. [2022-03-20 06:17:14,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 06:17:14,670 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:17:14,670 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:17:14,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 06:17:14,870 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:17:14,871 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:17:14,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:17:14,871 INFO L85 PathProgramCache]: Analyzing trace with hash 929445032, now seen corresponding path program 1 times [2022-03-20 06:17:14,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:17:14,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642270848] [2022-03-20 06:17:14,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:14,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:17:14,878 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:17:14,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [266119626] [2022-03-20 06:17:14,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:14,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:17:14,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:17:14,881 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) [2022-03-20 06:17:14,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 06:17:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:17:14,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 06:17:14,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:17:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-20 06:17:15,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:17:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-03-20 06:17:15,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:17:15,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642270848] [2022-03-20 06:17:15,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:17:15,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266119626] [2022-03-20 06:17:15,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266119626] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:17:15,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:17:15,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-20 06:17:15,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490112973] [2022-03-20 06:17:15,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:17:15,676 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 06:17:15,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:17:15,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 06:17:15,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-03-20 06:17:15,677 INFO L87 Difference]: Start difference. First operand 274 states and 341 transitions. Second operand has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-20 06:17:16,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:17:16,074 INFO L93 Difference]: Finished difference Result 266 states and 313 transitions. [2022-03-20 06:17:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 06:17:16,076 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 73 [2022-03-20 06:17:16,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:17:16,077 INFO L225 Difference]: With dead ends: 266 [2022-03-20 06:17:16,077 INFO L226 Difference]: Without dead ends: 239 [2022-03-20 06:17:16,078 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-03-20 06:17:16,078 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 66 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 06:17:16,079 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 243 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 06:17:16,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-03-20 06:17:16,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 223. [2022-03-20 06:17:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 150 states have (on average 1.1933333333333334) internal successors, (179), 154 states have internal predecessors, (179), 45 states have call successors, (45), 29 states have call predecessors, (45), 27 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-20 06:17:16,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 266 transitions. [2022-03-20 06:17:16,091 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 266 transitions. Word has length 73 [2022-03-20 06:17:16,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:17:16,092 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 266 transitions. [2022-03-20 06:17:16,092 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-20 06:17:16,092 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 266 transitions. [2022-03-20 06:17:16,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 06:17:16,094 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:17:16,095 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:17:16,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-20 06:17:16,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 06:17:16,300 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:17:16,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:17:16,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1139963303, now seen corresponding path program 1 times [2022-03-20 06:17:16,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:17:16,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286359557] [2022-03-20 06:17:16,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:16,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:17:16,307 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:17:16,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234728433] [2022-03-20 06:17:16,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:16,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:17:16,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:17:16,332 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) [2022-03-20 06:17:16,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 06:17:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:17:16,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 06:17:16,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:17:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-03-20 06:17:16,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:17:16,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:17:16,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286359557] [2022-03-20 06:17:16,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:17:16,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234728433] [2022-03-20 06:17:16,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234728433] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:17:16,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:17:16,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 06:17:16,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39692572] [2022-03-20 06:17:16,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:17:16,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:17:16,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:17:16,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:17:16,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:17:16,604 INFO L87 Difference]: Start difference. First operand 223 states and 266 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 06:17:16,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:17:16,654 INFO L93 Difference]: Finished difference Result 222 states and 263 transitions. [2022-03-20 06:17:16,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:17:16,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 82 [2022-03-20 06:17:16,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:17:16,656 INFO L225 Difference]: With dead ends: 222 [2022-03-20 06:17:16,657 INFO L226 Difference]: Without dead ends: 222 [2022-03-20 06:17:16,657 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:17:16,658 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 25 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:17:16,658 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 96 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:17:16,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-03-20 06:17:16,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2022-03-20 06:17:16,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 147 states have (on average 1.163265306122449) internal successors, (171), 149 states have internal predecessors, (171), 43 states have call successors, (43), 27 states have call predecessors, (43), 26 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 06:17:16,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 255 transitions. [2022-03-20 06:17:16,674 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 255 transitions. Word has length 82 [2022-03-20 06:17:16,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:17:16,674 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 255 transitions. [2022-03-20 06:17:16,674 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 06:17:16,675 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 255 transitions. [2022-03-20 06:17:16,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 06:17:16,675 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:17:16,675 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:17:16,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 06:17:16,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 06:17:16,892 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:17:16,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:17:16,892 INFO L85 PathProgramCache]: Analyzing trace with hash -2090333941, now seen corresponding path program 2 times [2022-03-20 06:17:16,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:17:16,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528843770] [2022-03-20 06:17:16,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:17:16,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:17:16,899 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:17:16,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369946498] [2022-03-20 06:17:16,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 06:17:16,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:17:16,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:17:16,908 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) [2022-03-20 06:17:16,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 06:17:16,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 06:17:16,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:17:16,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 06:17:16,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:17:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 06:17:17,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:17:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 06:17:35,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:17:35,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528843770] [2022-03-20 06:17:35,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:17:35,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369946498] [2022-03-20 06:17:35,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369946498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:17:35,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:17:35,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 06:17:35,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924408530] [2022-03-20 06:17:35,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:17:35,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 06:17:35,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:17:35,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 06:17:35,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-20 06:17:35,789 INFO L87 Difference]: Start difference. First operand 217 states and 255 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-20 06:17:44,713 WARN L232 SmtUtils]: Spent 8.66s on a formula simplification. DAG size of input: 192 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 06:17:46,374 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 06:17:48,930 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 06:17:56,704 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 06:17:58,773 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 06:18:01,911 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 06:18:06,979 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 06:18:07,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:07,647 INFO L93 Difference]: Finished difference Result 293 states and 379 transitions. [2022-03-20 06:18:07,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 06:18:07,648 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 94 [2022-03-20 06:18:07,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:07,649 INFO L225 Difference]: With dead ends: 293 [2022-03-20 06:18:07,649 INFO L226 Difference]: Without dead ends: 275 [2022-03-20 06:18:07,650 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=114, Invalid=305, Unknown=1, NotChecked=0, Total=420 [2022-03-20 06:18:07,650 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 125 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 193 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:07,650 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 659 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 529 Invalid, 4 Unknown, 0 Unchecked, 15.7s Time] [2022-03-20 06:18:07,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-20 06:18:07,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 257. [2022-03-20 06:18:07,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 172 states have (on average 1.2267441860465116) internal successors, (211), 177 states have internal predecessors, (211), 57 states have call successors, (57), 28 states have call predecessors, (57), 27 states have return successors, (55), 51 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 06:18:07,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 323 transitions. [2022-03-20 06:18:07,657 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 323 transitions. Word has length 94 [2022-03-20 06:18:07,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:07,658 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 323 transitions. [2022-03-20 06:18:07,658 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-20 06:18:07,658 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 323 transitions. [2022-03-20 06:18:07,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 06:18:07,659 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:07,659 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:07,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 06:18:07,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 06:18:07,859 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:07,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:07,860 INFO L85 PathProgramCache]: Analyzing trace with hash -105290329, now seen corresponding path program 1 times [2022-03-20 06:18:07,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:07,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236873607] [2022-03-20 06:18:07,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:07,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:07,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:18:07,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895016791] [2022-03-20 06:18:07,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:07,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:07,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:07,870 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) [2022-03-20 06:18:07,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 06:18:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:07,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 06:18:07,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:18:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-20 06:18:08,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:18:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-03-20 06:18:08,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:08,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236873607] [2022-03-20 06:18:08,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:18:08,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895016791] [2022-03-20 06:18:08,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895016791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:18:08,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:18:08,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 06:18:08,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908090199] [2022-03-20 06:18:08,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:18:08,262 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 06:18:08,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:08,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 06:18:08,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 06:18:08,262 INFO L87 Difference]: Start difference. First operand 257 states and 323 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-03-20 06:18:08,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:08,511 INFO L93 Difference]: Finished difference Result 661 states and 888 transitions. [2022-03-20 06:18:08,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 06:18:08,512 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 100 [2022-03-20 06:18:08,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:08,515 INFO L225 Difference]: With dead ends: 661 [2022-03-20 06:18:08,515 INFO L226 Difference]: Without dead ends: 659 [2022-03-20 06:18:08,516 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-03-20 06:18:08,516 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 148 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:08,516 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 400 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 06:18:08,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-03-20 06:18:08,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 552. [2022-03-20 06:18:08,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 361 states have (on average 1.2825484764542936) internal successors, (463), 378 states have internal predecessors, (463), 136 states have call successors, (136), 56 states have call predecessors, (136), 54 states have return successors, (131), 117 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-20 06:18:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 730 transitions. [2022-03-20 06:18:08,542 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 730 transitions. Word has length 100 [2022-03-20 06:18:08,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:08,542 INFO L478 AbstractCegarLoop]: Abstraction has 552 states and 730 transitions. [2022-03-20 06:18:08,543 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-03-20 06:18:08,543 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 730 transitions. [2022-03-20 06:18:08,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 06:18:08,543 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:08,544 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:08,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 06:18:08,762 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 06:18:08,762 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:08,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:08,763 INFO L85 PathProgramCache]: Analyzing trace with hash 331614142, now seen corresponding path program 1 times [2022-03-20 06:18:08,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:08,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022156021] [2022-03-20 06:18:08,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:08,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:08,772 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:18:08,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637276462] [2022-03-20 06:18:08,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:08,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:08,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:08,774 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) [2022-03-20 06:18:08,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 06:18:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:08,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 06:18:08,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:18:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 06:18:09,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:18:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 06:18:09,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:09,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022156021] [2022-03-20 06:18:09,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:18:09,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637276462] [2022-03-20 06:18:09,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637276462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:18:09,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:18:09,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-03-20 06:18:09,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944390150] [2022-03-20 06:18:09,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:18:09,194 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 06:18:09,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:09,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 06:18:09,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 06:18:09,194 INFO L87 Difference]: Start difference. First operand 552 states and 730 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (34), 9 states have call predecessors, (34), 8 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2022-03-20 06:18:09,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:09,405 INFO L93 Difference]: Finished difference Result 669 states and 858 transitions. [2022-03-20 06:18:09,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 06:18:09,406 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (34), 9 states have call predecessors, (34), 8 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 108 [2022-03-20 06:18:09,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:09,408 INFO L225 Difference]: With dead ends: 669 [2022-03-20 06:18:09,408 INFO L226 Difference]: Without dead ends: 667 [2022-03-20 06:18:09,409 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2022-03-20 06:18:09,409 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 165 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:09,409 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 303 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 06:18:09,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-03-20 06:18:09,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 651. [2022-03-20 06:18:09,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 439 states have (on average 1.2277904328018223) internal successors, (539), 452 states have internal predecessors, (539), 155 states have call successors, (155), 58 states have call predecessors, (155), 56 states have return successors, (150), 140 states have call predecessors, (150), 150 states have call successors, (150) [2022-03-20 06:18:09,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 844 transitions. [2022-03-20 06:18:09,423 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 844 transitions. Word has length 108 [2022-03-20 06:18:09,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:09,424 INFO L478 AbstractCegarLoop]: Abstraction has 651 states and 844 transitions. [2022-03-20 06:18:09,424 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (34), 9 states have call predecessors, (34), 8 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2022-03-20 06:18:09,424 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 844 transitions. [2022-03-20 06:18:09,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 06:18:09,425 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:09,425 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:09,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 06:18:09,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 06:18:09,628 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:09,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:09,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1288142005, now seen corresponding path program 1 times [2022-03-20 06:18:09,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:09,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600222083] [2022-03-20 06:18:09,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:09,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:09,635 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:18:09,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282462772] [2022-03-20 06:18:09,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:09,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:09,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:09,639 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:18:09,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 06:18:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:09,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 06:18:09,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:18:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 06:18:09,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:18:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 06:18:10,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:10,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600222083] [2022-03-20 06:18:10,753 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:18:10,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282462772] [2022-03-20 06:18:10,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282462772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:18:10,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:18:10,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 06:18:10,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150196299] [2022-03-20 06:18:10,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:18:10,754 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 06:18:10,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:10,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 06:18:10,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:18:10,755 INFO L87 Difference]: Start difference. First operand 651 states and 844 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-03-20 06:18:10,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:10,978 INFO L93 Difference]: Finished difference Result 655 states and 848 transitions. [2022-03-20 06:18:10,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 06:18:10,978 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) Word has length 110 [2022-03-20 06:18:10,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:10,981 INFO L225 Difference]: With dead ends: 655 [2022-03-20 06:18:10,981 INFO L226 Difference]: Without dead ends: 651 [2022-03-20 06:18:10,981 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 207 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-20 06:18:10,981 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 3 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:10,981 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 350 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 06:18:10,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-03-20 06:18:10,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2022-03-20 06:18:10,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 439 states have (on average 1.2232346241457859) internal successors, (537), 452 states have internal predecessors, (537), 155 states have call successors, (155), 58 states have call predecessors, (155), 56 states have return successors, (150), 140 states have call predecessors, (150), 150 states have call successors, (150) [2022-03-20 06:18:10,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 842 transitions. [2022-03-20 06:18:10,995 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 842 transitions. Word has length 110 [2022-03-20 06:18:10,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:10,995 INFO L478 AbstractCegarLoop]: Abstraction has 651 states and 842 transitions. [2022-03-20 06:18:10,995 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-03-20 06:18:10,995 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 842 transitions. [2022-03-20 06:18:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 06:18:10,996 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:10,996 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:11,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 06:18:11,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 06:18:11,215 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:11,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:11,216 INFO L85 PathProgramCache]: Analyzing trace with hash 848408867, now seen corresponding path program 2 times [2022-03-20 06:18:11,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:11,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569514303] [2022-03-20 06:18:11,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:11,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:11,221 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:18:11,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997342928] [2022-03-20 06:18:11,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 06:18:11,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:11,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:11,230 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:18:11,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 06:18:11,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 06:18:11,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:18:11,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 06:18:11,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:18:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 102 proven. 51 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-03-20 06:18:11,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:18:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 69 proven. 18 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-20 06:18:11,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:11,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569514303] [2022-03-20 06:18:11,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:18:11,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997342928] [2022-03-20 06:18:11,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997342928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:18:11,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:18:11,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-03-20 06:18:11,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564936418] [2022-03-20 06:18:11,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:18:11,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 06:18:11,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:11,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 06:18:11,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 06:18:11,758 INFO L87 Difference]: Start difference. First operand 651 states and 842 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-03-20 06:18:11,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:11,811 INFO L93 Difference]: Finished difference Result 573 states and 710 transitions. [2022-03-20 06:18:11,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:18:11,811 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) Word has length 124 [2022-03-20 06:18:11,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:11,813 INFO L225 Difference]: With dead ends: 573 [2022-03-20 06:18:11,813 INFO L226 Difference]: Without dead ends: 533 [2022-03-20 06:18:11,813 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 237 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 06:18:11,814 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 5 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:11,814 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 149 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:18:11,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-03-20 06:18:11,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 531. [2022-03-20 06:18:11,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 356 states have (on average 1.1882022471910112) internal successors, (423), 369 states have internal predecessors, (423), 121 states have call successors, (121), 55 states have call predecessors, (121), 53 states have return successors, (116), 106 states have call predecessors, (116), 116 states have call successors, (116) [2022-03-20 06:18:11,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 660 transitions. [2022-03-20 06:18:11,823 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 660 transitions. Word has length 124 [2022-03-20 06:18:11,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:11,823 INFO L478 AbstractCegarLoop]: Abstraction has 531 states and 660 transitions. [2022-03-20 06:18:11,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-03-20 06:18:11,824 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 660 transitions. [2022-03-20 06:18:11,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-03-20 06:18:11,825 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:11,825 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:11,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 06:18:12,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:12,043 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:12,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:12,043 INFO L85 PathProgramCache]: Analyzing trace with hash 722879610, now seen corresponding path program 3 times [2022-03-20 06:18:12,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:12,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102585777] [2022-03-20 06:18:12,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:12,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:12,051 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:18:12,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926384075] [2022-03-20 06:18:12,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 06:18:12,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:12,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:12,052 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:18:12,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 06:18:12,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 06:18:12,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:18:12,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 06:18:12,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:18:12,421 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 06:18:12,508 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 06:18:12,671 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 06:18:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2022-03-20 06:18:12,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:18:46,521 WARN L232 SmtUtils]: Spent 9.50s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 06:22:39,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:22:39,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102585777] [2022-03-20 06:22:39,448 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:22:39,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926384075] [2022-03-20 06:22:39,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926384075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 06:22:39,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 06:22:39,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 06:22:39,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784350978] [2022-03-20 06:22:39,448 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 06:22:39,448 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 06:22:39,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:22:39,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 06:22:39,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=188, Unknown=3, NotChecked=0, Total=240 [2022-03-20 06:22:39,449 INFO L87 Difference]: Start difference. First operand 531 states and 660 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 06:22:43,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:22:43,597 INFO L93 Difference]: Finished difference Result 543 states and 669 transitions. [2022-03-20 06:22:43,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 06:22:43,597 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 126 [2022-03-20 06:22:43,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:22:43,599 INFO L225 Difference]: With dead ends: 543 [2022-03-20 06:22:43,599 INFO L226 Difference]: Without dead ends: 539 [2022-03-20 06:22:43,599 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=62, Invalid=239, Unknown=5, NotChecked=0, Total=306 [2022-03-20 06:22:43,600 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:22:43,600 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 102 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:22:43,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-03-20 06:22:43,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 441. [2022-03-20 06:22:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 298 states have (on average 1.157718120805369) internal successors, (345), 300 states have internal predecessors, (345), 93 states have call successors, (93), 51 states have call predecessors, (93), 49 states have return successors, (90), 89 states have call predecessors, (90), 90 states have call successors, (90) [2022-03-20 06:22:43,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 528 transitions. [2022-03-20 06:22:43,608 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 528 transitions. Word has length 126 [2022-03-20 06:22:43,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:22:43,608 INFO L478 AbstractCegarLoop]: Abstraction has 441 states and 528 transitions. [2022-03-20 06:22:43,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 06:22:43,608 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 528 transitions. [2022-03-20 06:22:43,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 06:22:43,609 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:22:43,609 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:22:43,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 06:22:43,810 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:22:43,810 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:22:43,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:22:43,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1722143882, now seen corresponding path program 3 times [2022-03-20 06:22:43,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:22:43,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431160545] [2022-03-20 06:22:43,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:22:43,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:22:43,816 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:22:43,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665177350] [2022-03-20 06:22:43,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 06:22:43,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:22:43,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:22:43,818 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:22:43,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 06:22:43,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 06:22:43,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:22:43,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 06:22:43,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:22:44,026 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-03-20 06:22:44,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:22:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-03-20 06:22:44,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:22:44,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431160545] [2022-03-20 06:22:44,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:22:44,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665177350] [2022-03-20 06:22:44,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665177350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:22:44,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:22:44,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-20 06:22:44,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292911565] [2022-03-20 06:22:44,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:22:44,215 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 06:22:44,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:22:44,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 06:22:44,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-20 06:22:44,216 INFO L87 Difference]: Start difference. First operand 441 states and 528 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 06:22:44,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:22:44,331 INFO L93 Difference]: Finished difference Result 483 states and 560 transitions. [2022-03-20 06:22:44,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 06:22:44,338 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 128 [2022-03-20 06:22:44,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:22:44,340 INFO L225 Difference]: With dead ends: 483 [2022-03-20 06:22:44,340 INFO L226 Difference]: Without dead ends: 469 [2022-03-20 06:22:44,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-20 06:22:44,341 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:22:44,341 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 149 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:22:44,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-03-20 06:22:44,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 357. [2022-03-20 06:22:44,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 240 states have (on average 1.0958333333333334) internal successors, (263), 247 states have internal predecessors, (263), 67 states have call successors, (67), 50 states have call predecessors, (67), 49 states have return successors, (65), 59 states have call predecessors, (65), 65 states have call successors, (65) [2022-03-20 06:22:44,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 395 transitions. [2022-03-20 06:22:44,347 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 395 transitions. Word has length 128 [2022-03-20 06:22:44,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:22:44,347 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 395 transitions. [2022-03-20 06:22:44,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 06:22:44,347 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 395 transitions. [2022-03-20 06:22:44,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-03-20 06:22:44,348 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:22:44,349 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:22:44,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 06:22:44,549 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:22:44,549 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:22:44,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:22:44,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1538719799, now seen corresponding path program 2 times [2022-03-20 06:22:44,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:22:44,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976188826] [2022-03-20 06:22:44,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:22:44,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:22:44,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:22:44,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917322992] [2022-03-20 06:22:44,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 06:22:44,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:22:44,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:22:44,571 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:22:44,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 06:22:44,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 06:22:44,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:22:44,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 06:22:44,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:22:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 417 proven. 69 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2022-03-20 06:22:44,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:22:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 105 proven. 69 refuted. 0 times theorem prover too weak. 1116 trivial. 0 not checked. [2022-03-20 06:22:45,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:22:45,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976188826] [2022-03-20 06:22:45,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:22:45,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917322992] [2022-03-20 06:22:45,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917322992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:22:45,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:22:45,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-03-20 06:22:45,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956433859] [2022-03-20 06:22:45,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:22:45,237 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 06:22:45,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:22:45,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 06:22:45,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-20 06:22:45,237 INFO L87 Difference]: Start difference. First operand 357 states and 395 transitions. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 9 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2022-03-20 06:22:45,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:22:45,321 INFO L93 Difference]: Finished difference Result 381 states and 428 transitions. [2022-03-20 06:22:45,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 06:22:45,322 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 9 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) Word has length 168 [2022-03-20 06:22:45,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:22:45,323 INFO L225 Difference]: With dead ends: 381 [2022-03-20 06:22:45,323 INFO L226 Difference]: Without dead ends: 329 [2022-03-20 06:22:45,323 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 326 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-20 06:22:45,324 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 4 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:22:45,324 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 413 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:22:45,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-03-20 06:22:45,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2022-03-20 06:22:45,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 221 states have (on average 1.090497737556561) internal successors, (241), 227 states have internal predecessors, (241), 61 states have call successors, (61), 47 states have call predecessors, (61), 46 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2022-03-20 06:22:45,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 361 transitions. [2022-03-20 06:22:45,329 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 361 transitions. Word has length 168 [2022-03-20 06:22:45,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:22:45,329 INFO L478 AbstractCegarLoop]: Abstraction has 329 states and 361 transitions. [2022-03-20 06:22:45,329 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 9 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2022-03-20 06:22:45,329 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 361 transitions. [2022-03-20 06:22:45,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-03-20 06:22:45,330 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:22:45,330 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 25, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:22:45,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 06:22:45,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:22:45,544 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:22:45,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:22:45,544 INFO L85 PathProgramCache]: Analyzing trace with hash 885039068, now seen corresponding path program 3 times [2022-03-20 06:22:45,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:22:45,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101331988] [2022-03-20 06:22:45,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:22:45,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:22:45,551 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:22:45,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285945866] [2022-03-20 06:22:45,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 06:22:45,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:22:45,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:22:45,580 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:22:45,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 06:22:45,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-03-20 06:22:45,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:22:45,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 06:22:45,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:22:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 130 proven. 122 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2022-03-20 06:22:46,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:23:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 136 proven. 116 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2022-03-20 06:23:23,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:23:23,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101331988] [2022-03-20 06:23:23,628 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:23:23,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285945866] [2022-03-20 06:23:23,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285945866] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:23:23,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:23:23,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2022-03-20 06:23:23,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481070720] [2022-03-20 06:23:23,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:23:23,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 06:23:23,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:23:23,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 06:23:23,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-03-20 06:23:23,629 INFO L87 Difference]: Start difference. First operand 329 states and 361 transitions. Second operand has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 17 states have internal predecessors, (82), 14 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (49), 15 states have call predecessors, (49), 13 states have call successors, (49) [2022-03-20 06:23:24,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:23:24,143 INFO L93 Difference]: Finished difference Result 365 states and 412 transitions. [2022-03-20 06:23:24,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 06:23:24,144 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 17 states have internal predecessors, (82), 14 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (49), 15 states have call predecessors, (49), 13 states have call successors, (49) Word has length 172 [2022-03-20 06:23:24,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:23:24,145 INFO L225 Difference]: With dead ends: 365 [2022-03-20 06:23:24,145 INFO L226 Difference]: Without dead ends: 301 [2022-03-20 06:23:24,146 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 321 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-03-20 06:23:24,146 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 39 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 06:23:24,146 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 421 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 06:23:24,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-03-20 06:23:24,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2022-03-20 06:23:24,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 202 states have (on average 1.0841584158415842) internal successors, (219), 207 states have internal predecessors, (219), 55 states have call successors, (55), 44 states have call predecessors, (55), 43 states have return successors, (53), 49 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-20 06:23:24,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 327 transitions. [2022-03-20 06:23:24,151 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 327 transitions. Word has length 172 [2022-03-20 06:23:24,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:23:24,151 INFO L478 AbstractCegarLoop]: Abstraction has 301 states and 327 transitions. [2022-03-20 06:23:24,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 17 states have internal predecessors, (82), 14 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (49), 15 states have call predecessors, (49), 13 states have call successors, (49) [2022-03-20 06:23:24,152 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 327 transitions. [2022-03-20 06:23:24,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-20 06:23:24,153 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:23:24,154 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 26, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:23:24,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 06:23:24,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:23:24,371 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:23:24,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:23:24,372 INFO L85 PathProgramCache]: Analyzing trace with hash 87753903, now seen corresponding path program 4 times [2022-03-20 06:23:24,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:23:24,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765173887] [2022-03-20 06:23:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:23:24,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:23:24,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:23:24,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788013072] [2022-03-20 06:23:24,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 06:23:24,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:23:24,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:23:24,381 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:23:24,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 06:23:24,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 06:23:24,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-20 06:23:24,482 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 06:23:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 06:23:24,598 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 06:23:24,598 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 06:23:24,611 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 06:23:24,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 06:23:24,813 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:23:24,816 INFO L719 BasicCegarLoop]: Path program histogram: [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:23:24,818 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 06:23:24,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 06:23:24 BasicIcfg [2022-03-20 06:23:24,860 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 06:23:24,861 INFO L158 Benchmark]: Toolchain (without parser) took 384376.13ms. Allocated memory was 185.6MB in the beginning and 265.3MB in the end (delta: 79.7MB). Free memory was 158.0MB in the beginning and 179.4MB in the end (delta: -21.4MB). Peak memory consumption was 58.1MB. Max. memory is 8.0GB. [2022-03-20 06:23:24,861 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 185.6MB. Free memory is still 141.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 06:23:24,861 INFO L158 Benchmark]: CACSL2BoogieTranslator took 262.56ms. Allocated memory was 185.6MB in the beginning and 265.3MB in the end (delta: 79.7MB). Free memory was 157.8MB in the beginning and 235.7MB in the end (delta: -77.9MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. [2022-03-20 06:23:24,861 INFO L158 Benchmark]: Boogie Preprocessor took 44.31ms. Allocated memory is still 265.3MB. Free memory was 235.7MB in the beginning and 234.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 06:23:24,861 INFO L158 Benchmark]: RCFGBuilder took 238.47ms. Allocated memory is still 265.3MB. Free memory was 234.6MB in the beginning and 223.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 06:23:24,861 INFO L158 Benchmark]: IcfgTransformer took 18.79ms. Allocated memory is still 265.3MB. Free memory was 223.1MB in the beginning and 221.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 06:23:24,861 INFO L158 Benchmark]: TraceAbstraction took 383806.05ms. Allocated memory is still 265.3MB. Free memory was 221.0MB in the beginning and 179.4MB in the end (delta: 41.6MB). Peak memory consumption was 42.6MB. Max. memory is 8.0GB. [2022-03-20 06:23:24,862 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 185.6MB. Free memory is still 141.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 262.56ms. Allocated memory was 185.6MB in the beginning and 265.3MB in the end (delta: 79.7MB). Free memory was 157.8MB in the beginning and 235.7MB in the end (delta: -77.9MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 44.31ms. Allocated memory is still 265.3MB. Free memory was 235.7MB in the beginning and 234.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 238.47ms. Allocated memory is still 265.3MB. Free memory was 234.6MB in the beginning and 223.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 18.79ms. Allocated memory is still 265.3MB. Free memory was 223.1MB in the beginning and 221.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 383806.05ms. Allocated memory is still 265.3MB. Free memory was 221.0MB in the beginning and 179.4MB in the end (delta: 41.6MB). Peak memory consumption was 42.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=13, counter=0] [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [\old(counter)=0, A=31, B=1, counter=0, d=1, p=1, q=0, r=31] [L34] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=1, counter++=0, d=1, p=1, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=31, B=1, counter=1, d=1, p=1, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=31, B=1, counter=1, d=1, p=1, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=31, B=1, counter=1, d=1, p=1, q=0, r=31] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=31, B=1, counter=1, d=2, p=2, q=0, r=31] [L34] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=2, counter++=1, d=2, p=2, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=31, B=1, counter=2, d=2, p=2, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=31, B=1, counter=2, d=2, p=2, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=31, B=1, counter=2, d=2, p=2, q=0, r=31] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=31, B=1, counter=2, d=4, p=4, q=0, r=31] [L34] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=3, counter++=2, d=4, p=4, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=31, B=1, counter=3, d=4, p=4, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=31, B=1, counter=3, d=4, p=4, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=31, B=1, counter=3, d=4, p=4, q=0, r=31] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=31, B=1, counter=3, d=8, p=8, q=0, r=31] [L34] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=4, counter++=3, d=8, p=8, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=31, B=1, counter=4, d=8, p=8, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=31, B=1, counter=4, d=8, p=8, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=31, B=1, counter=4, d=8, p=8, q=0, r=31] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=31, B=1, counter=4, d=16, p=16, q=0, r=31] [L34] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=5, counter++=4, d=16, p=16, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=31, B=1, counter=5, d=16, p=16, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=31, B=1, counter=5, d=16, p=16, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=31, B=1, counter=5, d=16, p=16, q=0, r=31] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=31, B=1, counter=5, d=32, p=32, q=0, r=31] [L34] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=6, counter++=5, d=32, p=32, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=31, B=1, counter=6, d=32, p=32, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=31, B=1, counter=6, d=32, p=32, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=31, B=1, counter=6, d=32, p=32, q=0, r=31] [L38] COND TRUE !(r >= d) VAL [\old(counter)=0, A=31, B=1, counter=6, d=32, p=32, q=0, r=31] [L44] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=7, counter++=6, d=32, p=32, q=0, r=31] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [\old(counter)=0, A=31, B=1, counter=7, d=32, p=32, q=0, r=31] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L46] RET __VERIFIER_assert(d == B*p) VAL [\old(counter)=0, A=31, B=1, counter=7, d=32, p=32, q=0, r=31] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [\old(counter)=0, A=31, B=1, counter=7, d=16, p=16, q=0, r=31] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [\old(counter)=0, A=31, B=1, counter=7, d=16, p=16, q=16, r=15] [L44] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=8, counter++=7, d=16, p=16, q=16, r=15] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [\old(counter)=0, A=31, B=1, counter=8, d=16, p=16, q=16, r=15] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L46] RET __VERIFIER_assert(d == B*p) VAL [\old(counter)=0, A=31, B=1, counter=8, d=16, p=16, q=16, r=15] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [\old(counter)=0, A=31, B=1, counter=8, d=8, p=8, q=16, r=15] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [\old(counter)=0, A=31, B=1, counter=8, d=8, p=8, q=24, r=7] [L44] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=9, counter++=8, d=8, p=8, q=24, r=7] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [\old(counter)=0, A=31, B=1, counter=9, d=8, p=8, q=24, r=7] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L46] RET __VERIFIER_assert(d == B*p) VAL [\old(counter)=0, A=31, B=1, counter=9, d=8, p=8, q=24, r=7] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [\old(counter)=0, A=31, B=1, counter=9, d=4, p=4, q=24, r=7] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [\old(counter)=0, A=31, B=1, counter=9, d=4, p=4, q=28, r=3] [L44] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=10, counter++=9, d=4, p=4, q=28, r=3] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [\old(counter)=0, A=31, B=1, counter=10, d=4, p=4, q=28, r=3] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L46] RET __VERIFIER_assert(d == B*p) VAL [\old(counter)=0, A=31, B=1, counter=10, d=4, p=4, q=28, r=3] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [\old(counter)=0, A=31, B=1, counter=10, d=2, p=2, q=28, r=3] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [\old(counter)=0, A=31, B=1, counter=10, d=2, p=2, q=30, r=1] [L44] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=11, counter++=10, d=2, p=2, q=30, r=1] [L44] COND FALSE !(counter++<10) [L58] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=0, \old(counter)=0, counter=11] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 383.7s, OverallIterations: 23, TraceHistogramMax: 27, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 46.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 972 SdHoareTripleChecker+Valid, 18.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 900 mSDsluCounter, 4725 SdHoareTripleChecker+Invalid, 18.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3651 mSDsCounter, 693 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3066 IncrementalHoareTripleChecker+Invalid, 3763 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 693 mSolverCounterUnsat, 1074 mSDtfsCounter, 3066 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2913 GetRequests, 2665 SyntacticMatches, 29 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 60.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=651occurred in iteration=16, InterpolantAutomatonStates: 191, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 22 MinimizatonAttempts, 440 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 331.0s InterpolantComputationTime, 1790 NumberOfCodeBlocks, 1664 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 2848 ConstructedInterpolants, 0 QuantifiedInterpolants, 41144 SizeOfPredicates, 48 NumberOfNonLiveVariables, 3901 ConjunctsInSsa, 299 ConjunctsInUnsatCore, 35 InterpolantComputations, 9 PerfectInterpolantSequences, 12686/14119 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-20 06:23:25,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...