/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/array-programs/partial_mod_count_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 09:18:02,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 09:18:02,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 09:18:02,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 09:18:02,805 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 09:18:02,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 09:18:02,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 09:18:02,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 09:18:02,813 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 09:18:02,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 09:18:02,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 09:18:02,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 09:18:02,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 09:18:02,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 09:18:02,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 09:18:02,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 09:18:02,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 09:18:02,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 09:18:02,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 09:18:02,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 09:18:02,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 09:18:02,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 09:18:02,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 09:18:02,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 09:18:02,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 09:18:02,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 09:18:02,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 09:18:02,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 09:18:02,845 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 09:18:02,855 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 09:18:02,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 09:18:02,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 09:18:02,857 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 09:18:02,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 09:18:02,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 09:18:02,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 09:18:02,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 09:18:02,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 09:18:02,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 09:18:02,857 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 09:18:02,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 09:18:02,858 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 09:18:02,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 09:18:02,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 09:18:02,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 09:18:02,858 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 09:18:02,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 09:18:02,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:18:02,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 09:18:02,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 09:18:02,859 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 09:18:02,859 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 09:18:03,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 09:18:03,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 09:18:03,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 09:18:03,073 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 09:18:03,073 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 09:18:03,074 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/partial_mod_count_1.c [2022-01-31 09:18:03,126 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb3fb4587/afc30962edf84f97a7508b0939b4908b/FLAG76304a4aa [2022-01-31 09:18:03,469 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 09:18:03,469 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_1.c [2022-01-31 09:18:03,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb3fb4587/afc30962edf84f97a7508b0939b4908b/FLAG76304a4aa [2022-01-31 09:18:03,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb3fb4587/afc30962edf84f97a7508b0939b4908b [2022-01-31 09:18:03,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 09:18:03,486 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 09:18:03,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 09:18:03,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 09:18:03,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 09:18:03,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:18:03" (1/1) ... [2022-01-31 09:18:03,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@385249a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:18:03, skipping insertion in model container [2022-01-31 09:18:03,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:18:03" (1/1) ... [2022-01-31 09:18:03,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 09:18:03,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 09:18:03,655 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_1.c[323,336] [2022-01-31 09:18:03,672 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:18:03,689 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 09:18:03,698 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_1.c[323,336] [2022-01-31 09:18:03,708 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:18:03,717 INFO L208 MainTranslator]: Completed translation [2022-01-31 09:18:03,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:18:03 WrapperNode [2022-01-31 09:18:03,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 09:18:03,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 09:18:03,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 09:18:03,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 09:18:03,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:18:03" (1/1) ... [2022-01-31 09:18:03,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:18:03" (1/1) ... [2022-01-31 09:18:03,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:18:03" (1/1) ... [2022-01-31 09:18:03,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:18:03" (1/1) ... [2022-01-31 09:18:03,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:18:03" (1/1) ... [2022-01-31 09:18:03,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:18:03" (1/1) ... [2022-01-31 09:18:03,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:18:03" (1/1) ... [2022-01-31 09:18:03,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 09:18:03,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 09:18:03,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 09:18:03,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 09:18:03,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:18:03" (1/1) ... [2022-01-31 09:18:03,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:18:03,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:18:03,787 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 09:18:03,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 09:18:03,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 09:18:03,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 09:18:03,818 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 09:18:03,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 09:18:03,819 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 09:18:03,819 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 09:18:03,819 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 09:18:03,819 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 09:18:03,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 09:18:03,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 09:18:03,819 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 09:18:03,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 09:18:03,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 09:18:03,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 09:18:03,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 09:18:03,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 09:18:03,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 09:18:03,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 09:18:03,867 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 09:18:03,868 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 09:18:03,970 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 09:18:03,973 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 09:18:03,974 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 09:18:03,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:18:03 BoogieIcfgContainer [2022-01-31 09:18:03,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 09:18:03,975 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 09:18:03,975 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 09:18:03,976 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 09:18:03,978 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:18:03" (1/1) ... [2022-01-31 09:18:03,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:18:03 BasicIcfg [2022-01-31 09:18:03,988 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 09:18:03,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 09:18:03,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 09:18:03,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 09:18:03,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:18:03" (1/4) ... [2022-01-31 09:18:03,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3ad6c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:18:03, skipping insertion in model container [2022-01-31 09:18:03,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:18:03" (2/4) ... [2022-01-31 09:18:03,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3ad6c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:18:03, skipping insertion in model container [2022-01-31 09:18:03,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:18:03" (3/4) ... [2022-01-31 09:18:03,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3ad6c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:18:03, skipping insertion in model container [2022-01-31 09:18:03,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:18:03" (4/4) ... [2022-01-31 09:18:03,992 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_1.cJordan [2022-01-31 09:18:04,010 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 09:18:04,010 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 09:18:04,034 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 09:18:04,038 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 09:18:04,039 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 09:18:04,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:18:04,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 09:18:04,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:18:04,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:18:04,061 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:18:04,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:18:04,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2081050055, now seen corresponding path program 1 times [2022-01-31 09:18:04,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:18:04,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909830183] [2022-01-31 09:18:04,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:04,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:18:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:04,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:18:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:04,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:18:04,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:18:04,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909830183] [2022-01-31 09:18:04,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909830183] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:18:04,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:18:04,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 09:18:04,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747325682] [2022-01-31 09:18:04,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:18:04,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:18:04,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:18:04,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:18:04,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:18:04,295 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-01-31 09:18:04,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:18:04,332 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-01-31 09:18:04,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:18:04,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 14 [2022-01-31 09:18:04,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:18:04,338 INFO L225 Difference]: With dead ends: 25 [2022-01-31 09:18:04,338 INFO L226 Difference]: Without dead ends: 20 [2022-01-31 09:18:04,339 INFO L932 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 [2022-01-31 09:18:04,343 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:18:04,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 23 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:18:04,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-31 09:18:04,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-31 09:18:04,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:18:04,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-01-31 09:18:04,364 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-01-31 09:18:04,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:18:04,364 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-01-31 09:18:04,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-01-31 09:18:04,364 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-01-31 09:18:04,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 09:18:04,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:18:04,365 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:18:04,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 09:18:04,366 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:18:04,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:18:04,368 INFO L85 PathProgramCache]: Analyzing trace with hash -471106906, now seen corresponding path program 1 times [2022-01-31 09:18:04,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:18:04,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605167483] [2022-01-31 09:18:04,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:04,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:18:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:04,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:18:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:18:04,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:18:04,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605167483] [2022-01-31 09:18:04,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605167483] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:18:04,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:18:04,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:18:04,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900773069] [2022-01-31 09:18:04,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:18:04,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 09:18:04,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:18:04,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 09:18:04,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 09:18:04,470 INFO L87 Difference]: Start difference. First operand 20 states and 23 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) [2022-01-31 09:18:04,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:18:04,550 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-01-31 09:18:04,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 09:18:04,550 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 [2022-01-31 09:18:04,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:18:04,552 INFO L225 Difference]: With dead ends: 27 [2022-01-31 09:18:04,552 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 09:18:04,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 09:18:04,557 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:18:04,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 18 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:18:04,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 09:18:04,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-01-31 09:18:04,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:18:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-01-31 09:18:04,565 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2022-01-31 09:18:04,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:18:04,565 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-01-31 09:18:04,566 INFO L471 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) [2022-01-31 09:18:04,566 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-01-31 09:18:04,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 09:18:04,567 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:18:04,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:18:04,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 09:18:04,570 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:18:04,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:18:04,575 INFO L85 PathProgramCache]: Analyzing trace with hash -150654790, now seen corresponding path program 1 times [2022-01-31 09:18:04,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:18:04,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294829123] [2022-01-31 09:18:04,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:04,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:18:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:04,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:18:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:18:04,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:18:04,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294829123] [2022-01-31 09:18:04,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294829123] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:18:04,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522818620] [2022-01-31 09:18:04,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:04,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:04,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:18:04,654 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:18:04,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 09:18:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:04,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:18:04,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:18:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:18:04,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:18:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:18:04,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522818620] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:18:04,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:18:04,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-01-31 09:18:04,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960119070] [2022-01-31 09:18:04,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:18:04,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 09:18:04,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:18:04,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 09:18:04,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-01-31 09:18:04,827 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:18:04,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:18:04,968 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-01-31 09:18:04,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 09:18:04,968 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-01-31 09:18:04,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:18:04,969 INFO L225 Difference]: With dead ends: 43 [2022-01-31 09:18:04,969 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 09:18:04,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-01-31 09:18:04,970 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 73 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:18:04,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 27 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:18:04,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 09:18:04,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2022-01-31 09:18:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:18:04,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-31 09:18:04,974 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 17 [2022-01-31 09:18:04,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:18:04,974 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-31 09:18:04,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:18:04,974 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-31 09:18:04,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 09:18:04,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:18:04,975 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:18:04,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 09:18:05,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:05,201 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:18:05,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:18:05,201 INFO L85 PathProgramCache]: Analyzing trace with hash -487976442, now seen corresponding path program 1 times [2022-01-31 09:18:05,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:18:05,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570139196] [2022-01-31 09:18:05,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:05,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:18:05,213 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:18:05,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204798972] [2022-01-31 09:18:05,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:05,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:05,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:18:05,214 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:18:05,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 09:18:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:05,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 09:18:05,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:18:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:18:05,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:18:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:18:05,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:18:05,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570139196] [2022-01-31 09:18:05,481 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:18:05,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204798972] [2022-01-31 09:18:05,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204798972] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:18:05,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:18:05,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-31 09:18:05,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895293477] [2022-01-31 09:18:05,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:18:05,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 09:18:05,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:18:05,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 09:18:05,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-01-31 09:18:05,483 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:18:05,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:18:05,695 INFO L93 Difference]: Finished difference Result 87 states and 112 transitions. [2022-01-31 09:18:05,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 09:18:05,696 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-01-31 09:18:05,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:18:05,697 INFO L225 Difference]: With dead ends: 87 [2022-01-31 09:18:05,697 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 09:18:05,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-01-31 09:18:05,698 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 164 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:18:05,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 68 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:18:05,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 09:18:05,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 48. [2022-01-31 09:18:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:18:05,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-01-31 09:18:05,704 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 26 [2022-01-31 09:18:05,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:18:05,704 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-01-31 09:18:05,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:18:05,705 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-01-31 09:18:05,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 09:18:05,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:18:05,705 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:18:05,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 09:18:05,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 09:18:05,926 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:18:05,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:18:05,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1464565319, now seen corresponding path program 2 times [2022-01-31 09:18:05,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:18:05,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411275441] [2022-01-31 09:18:05,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:05,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:18:05,949 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:18:05,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493059856] [2022-01-31 09:18:05,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:18:05,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:05,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:18:05,950 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:18:05,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 09:18:05,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-31 09:18:05,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:18:05,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 09:18:05,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:18:06,203 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-31 09:18:06,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 09:18:06,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:18:06,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411275441] [2022-01-31 09:18:06,203 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:18:06,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493059856] [2022-01-31 09:18:06,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493059856] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:18:06,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:18:06,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 09:18:06,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298196263] [2022-01-31 09:18:06,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:18:06,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 09:18:06,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:18:06,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 09:18:06,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-31 09:18:06,205 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-01-31 09:18:06,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:18:06,244 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-01-31 09:18:06,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 09:18:06,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 44 [2022-01-31 09:18:06,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:18:06,246 INFO L225 Difference]: With dead ends: 60 [2022-01-31 09:18:06,246 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 09:18:06,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-31 09:18:06,246 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:18:06,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 56 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:18:06,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 09:18:06,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-01-31 09:18:06,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:18:06,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-01-31 09:18:06,250 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 44 [2022-01-31 09:18:06,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:18:06,251 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-01-31 09:18:06,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-01-31 09:18:06,251 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-01-31 09:18:06,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 09:18:06,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:18:06,252 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:18:06,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 09:18:06,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:06,469 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:18:06,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:18:06,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1118259974, now seen corresponding path program 1 times [2022-01-31 09:18:06,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:18:06,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020925931] [2022-01-31 09:18:06,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:06,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:18:06,485 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:18:06,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [959738465] [2022-01-31 09:18:06,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:06,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:06,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:18:06,495 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:18:06,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 09:18:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:06,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 09:18:06,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:18:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:18:06,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:18:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 2 proven. 145 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:18:07,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:18:07,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020925931] [2022-01-31 09:18:07,007 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:18:07,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959738465] [2022-01-31 09:18:07,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959738465] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:18:07,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:18:07,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-01-31 09:18:07,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340684463] [2022-01-31 09:18:07,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:18:07,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 09:18:07,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:18:07,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 09:18:07,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-01-31 09:18:07,011 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:18:07,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:18:07,538 INFO L93 Difference]: Finished difference Result 354 states and 495 transitions. [2022-01-31 09:18:07,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 09:18:07,539 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-01-31 09:18:07,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:18:07,541 INFO L225 Difference]: With dead ends: 354 [2022-01-31 09:18:07,541 INFO L226 Difference]: Without dead ends: 354 [2022-01-31 09:18:07,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 09:18:07,542 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 374 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:18:07,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 92 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:18:07,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-01-31 09:18:07,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 96. [2022-01-31 09:18:07,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 87 states have internal predecessors, (103), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:18:07,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2022-01-31 09:18:07,562 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 52 [2022-01-31 09:18:07,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:18:07,562 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2022-01-31 09:18:07,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:18:07,562 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2022-01-31 09:18:07,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 09:18:07,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:18:07,564 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:18:07,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 09:18:07,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:07,785 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:18:07,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:18:07,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1260735770, now seen corresponding path program 2 times [2022-01-31 09:18:07,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:18:07,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087087717] [2022-01-31 09:18:07,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:07,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:18:07,816 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:18:07,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552712773] [2022-01-31 09:18:07,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:18:07,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:07,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:18:07,839 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:18:07,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 09:18:07,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:18:07,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:18:07,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 09:18:07,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:18:08,423 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:18:08,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:18:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 2 proven. 715 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:18:09,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:18:09,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087087717] [2022-01-31 09:18:09,071 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:18:09,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552712773] [2022-01-31 09:18:09,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552712773] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:18:09,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:18:09,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-01-31 09:18:09,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235949592] [2022-01-31 09:18:09,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:18:09,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 09:18:09,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:18:09,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 09:18:09,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 09:18:09,074 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:18:10,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:18:10,277 INFO L93 Difference]: Finished difference Result 732 states and 1035 transitions. [2022-01-31 09:18:10,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 09:18:10,278 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 88 [2022-01-31 09:18:10,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:18:10,280 INFO L225 Difference]: With dead ends: 732 [2022-01-31 09:18:10,280 INFO L226 Difference]: Without dead ends: 732 [2022-01-31 09:18:10,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 09:18:10,282 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 931 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:18:10,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [954 Valid, 147 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 09:18:10,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-01-31 09:18:10,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 168. [2022-01-31 09:18:10,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 159 states have (on average 1.1761006289308176) internal successors, (187), 159 states have internal predecessors, (187), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:18:10,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 196 transitions. [2022-01-31 09:18:10,300 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 196 transitions. Word has length 88 [2022-01-31 09:18:10,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:18:10,300 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 196 transitions. [2022-01-31 09:18:10,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:18:10,300 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 196 transitions. [2022-01-31 09:18:10,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 09:18:10,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:18:10,302 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:18:10,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-31 09:18:10,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:10,515 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:18:10,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:18:10,516 INFO L85 PathProgramCache]: Analyzing trace with hash -2038883674, now seen corresponding path program 3 times [2022-01-31 09:18:10,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:18:10,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16841189] [2022-01-31 09:18:10,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:10,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:18:10,550 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:18:10,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928834901] [2022-01-31 09:18:10,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:18:10,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:10,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:18:10,551 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:18:10,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 09:18:10,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 09:18:10,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:18:10,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 09:18:10,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:18:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3156 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-01-31 09:18:11,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:18:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3156 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-01-31 09:18:12,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:18:12,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16841189] [2022-01-31 09:18:12,588 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:18:12,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928834901] [2022-01-31 09:18:12,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928834901] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:18:12,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:18:12,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-01-31 09:18:12,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44697557] [2022-01-31 09:18:12,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:18:12,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 09:18:12,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:18:12,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 09:18:12,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-01-31 09:18:12,589 INFO L87 Difference]: Start difference. First operand 168 states and 196 transitions. Second operand has 12 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:18:12,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:18:12,706 INFO L93 Difference]: Finished difference Result 188 states and 223 transitions. [2022-01-31 09:18:12,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 09:18:12,707 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 160 [2022-01-31 09:18:12,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:18:12,708 INFO L225 Difference]: With dead ends: 188 [2022-01-31 09:18:12,708 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 09:18:12,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 309 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2022-01-31 09:18:12,708 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:18:12,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 75 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:18:12,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 09:18:12,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-01-31 09:18:12,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 174 states have (on average 1.1839080459770115) internal successors, (206), 174 states have internal predecessors, (206), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 09:18:12,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 223 transitions. [2022-01-31 09:18:12,715 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 223 transitions. Word has length 160 [2022-01-31 09:18:12,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:18:12,716 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 223 transitions. [2022-01-31 09:18:12,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:18:12,716 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 223 transitions. [2022-01-31 09:18:12,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 09:18:12,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:18:12,718 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:18:12,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 09:18:12,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:12,928 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:18:12,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:18:12,928 INFO L85 PathProgramCache]: Analyzing trace with hash -132909150, now seen corresponding path program 4 times [2022-01-31 09:18:12,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:18:12,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544313747] [2022-01-31 09:18:12,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:12,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:18:12,981 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:18:12,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663583793] [2022-01-31 09:18:12,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:18:12,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:12,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:18:13,003 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:18:13,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 09:18:13,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:18:13,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:18:13,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-31 09:18:13,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:18:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 737 proven. 1674 refuted. 0 times theorem prover too weak. 845 trivial. 0 not checked. [2022-01-31 09:18:14,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:18:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 747 proven. 1664 refuted. 0 times theorem prover too weak. 845 trivial. 0 not checked. [2022-01-31 09:18:16,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:18:16,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544313747] [2022-01-31 09:18:16,116 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:18:16,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663583793] [2022-01-31 09:18:16,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663583793] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:18:16,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:18:16,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 65 [2022-01-31 09:18:16,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995729607] [2022-01-31 09:18:16,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:18:16,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 09:18:16,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:18:16,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 09:18:16,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1232, Invalid=2928, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 09:18:16,119 INFO L87 Difference]: Start difference. First operand 188 states and 223 transitions. Second operand has 65 states, 63 states have (on average 3.0634920634920637) internal successors, (193), 64 states have internal predecessors, (193), 13 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 09:18:21,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:18:21,316 INFO L93 Difference]: Finished difference Result 732 states and 1036 transitions. [2022-01-31 09:18:21,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2022-01-31 09:18:21,317 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 63 states have (on average 3.0634920634920637) internal successors, (193), 64 states have internal predecessors, (193), 13 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 192 [2022-01-31 09:18:21,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:18:21,322 INFO L225 Difference]: With dead ends: 732 [2022-01-31 09:18:21,322 INFO L226 Difference]: Without dead ends: 732 [2022-01-31 09:18:21,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20225 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=13359, Invalid=33081, Unknown=0, NotChecked=0, Total=46440 [2022-01-31 09:18:21,333 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 407 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 2750 mSolverCounterSat, 1074 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 3824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1074 IncrementalHoareTripleChecker+Valid, 2750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:18:21,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 482 Invalid, 3824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1074 Valid, 2750 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 09:18:21,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-01-31 09:18:21,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 224. [2022-01-31 09:18:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 201 states have (on average 1.199004975124378) internal successors, (241), 201 states have internal predecessors, (241), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 09:18:21,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 274 transitions. [2022-01-31 09:18:21,356 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 274 transitions. Word has length 192 [2022-01-31 09:18:21,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:18:21,357 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 274 transitions. [2022-01-31 09:18:21,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 63 states have (on average 3.0634920634920637) internal successors, (193), 64 states have internal predecessors, (193), 13 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 09:18:21,357 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 274 transitions. [2022-01-31 09:18:21,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-01-31 09:18:21,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:18:21,359 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:18:21,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 09:18:21,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:21,560 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:18:21,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:18:21,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2094064026, now seen corresponding path program 5 times [2022-01-31 09:18:21,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:18:21,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738038679] [2022-01-31 09:18:21,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:21,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:18:21,620 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:18:21,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617009678] [2022-01-31 09:18:21,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:18:21,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:21,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:18:21,631 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:18:21,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 09:29:41,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-01-31 09:29:41,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:29:41,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 09:29:41,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:29:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3840 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2022-01-31 09:29:43,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:29:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3840 backedges. 26 proven. 3151 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2022-01-31 09:29:46,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:29:46,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738038679] [2022-01-31 09:29:46,398 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:29:46,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617009678] [2022-01-31 09:29:46,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617009678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:29:46,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:29:46,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-01-31 09:29:46,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401954619] [2022-01-31 09:29:46,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:29:46,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 09:29:46,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:29:46,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 09:29:46,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 09:29:46,401 INFO L87 Difference]: Start difference. First operand 224 states and 274 transitions. Second operand has 98 states, 98 states have (on average 3.020408163265306) internal successors, (296), 98 states have internal predecessors, (296), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:29:53,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:29:53,615 INFO L93 Difference]: Finished difference Result 5636 states and 8325 transitions. [2022-01-31 09:29:53,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 09:29:53,615 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.020408163265306) internal successors, (296), 98 states have internal predecessors, (296), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 256 [2022-01-31 09:29:53,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:29:53,632 INFO L225 Difference]: With dead ends: 5636 [2022-01-31 09:29:53,632 INFO L226 Difference]: Without dead ends: 5636 [2022-01-31 09:29:53,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 09:29:53,634 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1933 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 1062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1980 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1062 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 09:29:53,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1980 Valid, 258 Invalid, 2059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1062 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 09:29:53,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5636 states. [2022-01-31 09:29:53,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5636 to 368. [2022-01-31 09:29:53,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 345 states have (on average 1.1855072463768115) internal successors, (409), 345 states have internal predecessors, (409), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 09:29:53,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 442 transitions. [2022-01-31 09:29:53,750 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 442 transitions. Word has length 256 [2022-01-31 09:29:53,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:29:53,751 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 442 transitions. [2022-01-31 09:29:53,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.020408163265306) internal successors, (296), 98 states have internal predecessors, (296), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:29:53,751 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 442 transitions. [2022-01-31 09:29:53,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2022-01-31 09:29:53,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:29:53,756 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 47, 47, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:29:53,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 09:29:53,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 09:29:53,973 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:29:53,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:29:53,973 INFO L85 PathProgramCache]: Analyzing trace with hash 874123546, now seen corresponding path program 6 times [2022-01-31 09:29:53,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:29:53,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679412132] [2022-01-31 09:29:53,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:29:53,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:29:54,047 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:29:54,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43711967] [2022-01-31 09:29:54,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:29:54,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:29:54,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:29:54,064 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:29:54,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 09:29:57,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-01-31 09:29:57,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:29:57,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-31 09:29:57,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:29:58,880 INFO L134 CoverageAnalysis]: Checked inductivity of 13896 backedges. 0 proven. 377 refuted. 0 times theorem prover too weak. 13519 trivial. 0 not checked. [2022-01-31 09:29:58,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:30:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13896 backedges. 26 proven. 351 refuted. 0 times theorem prover too weak. 13519 trivial. 0 not checked. [2022-01-31 09:30:02,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:30:02,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679412132] [2022-01-31 09:30:02,745 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:30:02,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43711967] [2022-01-31 09:30:02,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43711967] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:30:02,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:30:02,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2022-01-31 09:30:02,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678578732] [2022-01-31 09:30:02,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:30:02,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 09:30:02,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:30:02,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 09:30:02,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=535, Invalid=725, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 09:30:02,747 INFO L87 Difference]: Start difference. First operand 368 states and 442 transitions. Second operand has 36 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 35 states have internal predecessors, (109), 31 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (28), 28 states have call predecessors, (28), 27 states have call successors, (28) [2022-01-31 09:30:03,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:30:03,501 INFO L93 Difference]: Finished difference Result 436 states and 541 transitions. [2022-01-31 09:30:03,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 09:30:03,503 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 35 states have internal predecessors, (109), 31 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (28), 28 states have call predecessors, (28), 27 states have call successors, (28) Word has length 400 [2022-01-31 09:30:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:30:03,507 INFO L225 Difference]: With dead ends: 436 [2022-01-31 09:30:03,508 INFO L226 Difference]: Without dead ends: 436 [2022-01-31 09:30:03,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 765 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1057, Invalid=1699, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 09:30:03,508 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 269 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:30:03,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 130 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:30:03,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-01-31 09:30:03,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2022-01-31 09:30:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 396 states have (on average 1.202020202020202) internal successors, (476), 396 states have internal predecessors, (476), 33 states have call successors, (33), 7 states have call predecessors, (33), 6 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-01-31 09:30:03,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 541 transitions. [2022-01-31 09:30:03,514 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 541 transitions. Word has length 400 [2022-01-31 09:30:03,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:30:03,515 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 541 transitions. [2022-01-31 09:30:03,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 35 states have internal predecessors, (109), 31 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (28), 28 states have call predecessors, (28), 27 states have call successors, (28) [2022-01-31 09:30:03,515 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 541 transitions. [2022-01-31 09:30:03,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2022-01-31 09:30:03,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:30:03,520 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 47, 47, 30, 30, 30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:30:03,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-31 09:30:03,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:30:03,732 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:30:03,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:30:03,733 INFO L85 PathProgramCache]: Analyzing trace with hash -96951030, now seen corresponding path program 7 times [2022-01-31 09:30:03,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:30:03,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602991136] [2022-01-31 09:30:03,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:30:03,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:30:03,780 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:30:03,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530187584] [2022-01-31 09:30:03,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:30:03,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:30:03,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:30:03,782 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:30:03,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 09:30:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:30:04,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 97 conjunts are in the unsatisfiable core [2022-01-31 09:30:04,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:30:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16600 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 3393 trivial. 0 not checked. [2022-01-31 09:30:07,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:30:30,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16600 backedges. 58 proven. 13207 refuted. 0 times theorem prover too weak. 3335 trivial. 0 not checked. [2022-01-31 09:30:30,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:30:30,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602991136] [2022-01-31 09:30:30,194 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:30:30,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530187584] [2022-01-31 09:30:30,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530187584] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:30:30,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:30:30,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2022-01-31 09:30:30,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456679849] [2022-01-31 09:30:30,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:30:30,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-01-31 09:30:30,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:30:30,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-01-31 09:30:30,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18531, Invalid=18911, Unknown=0, NotChecked=0, Total=37442 [2022-01-31 09:30:30,200 INFO L87 Difference]: Start difference. First operand 436 states and 541 transitions. Second operand has 194 states, 194 states have (on average 3.0103092783505154) internal successors, (584), 194 states have internal predecessors, (584), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4)