/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/reducercommutativity/max60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:36:21,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:36:21,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:36:21,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:36:21,755 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:36:21,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:36:21,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:36:21,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:36:21,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:36:21,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:36:21,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:36:21,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:36:21,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:36:21,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:36:21,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:36:21,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:36:21,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:36:21,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:36:21,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:36:21,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:36:21,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:36:21,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:36:21,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:36:21,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:36:21,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:36:21,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:36:21,801 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:36:21,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:36:21,807 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:36:21,819 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:36:21,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:36:21,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:36:21,821 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:36:21,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:36:21,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:36:21,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:36:21,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:36:21,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:36:21,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:36:21,823 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:36:21,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:36:21,824 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:36:21,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:36:21,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:36:21,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:36:21,824 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:36:21,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:36:21,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:36:21,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:36:21,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:36:21,825 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:36:21,825 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:36:22,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:36:22,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:36:22,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:36:22,071 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:36:22,071 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:36:22,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max60-2.i [2022-01-31 08:36:22,131 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f914d28d/ecbcd92230b345bf9231bbd1c2a9b728/FLAG4d65d38ef [2022-01-31 08:36:22,508 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:36:22,509 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max60-2.i [2022-01-31 08:36:22,516 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f914d28d/ecbcd92230b345bf9231bbd1c2a9b728/FLAG4d65d38ef [2022-01-31 08:36:22,528 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f914d28d/ecbcd92230b345bf9231bbd1c2a9b728 [2022-01-31 08:36:22,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:36:22,532 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:36:22,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:36:22,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:36:22,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:36:22,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:36:22" (1/1) ... [2022-01-31 08:36:22,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@639eeeb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:36:22, skipping insertion in model container [2022-01-31 08:36:22,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:36:22" (1/1) ... [2022-01-31 08:36:22,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:36:22,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:36:22,741 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max60-2.i[1290,1303] [2022-01-31 08:36:22,746 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:36:22,751 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:36:22,765 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max60-2.i[1290,1303] [2022-01-31 08:36:22,766 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:36:22,773 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:36:22,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:36:22 WrapperNode [2022-01-31 08:36:22,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:36:22,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:36:22,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:36:22,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:36:22,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:36:22" (1/1) ... [2022-01-31 08:36:22,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:36:22" (1/1) ... [2022-01-31 08:36:22,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:36:22" (1/1) ... [2022-01-31 08:36:22,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:36:22" (1/1) ... [2022-01-31 08:36:22,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:36:22" (1/1) ... [2022-01-31 08:36:22,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:36:22" (1/1) ... [2022-01-31 08:36:22,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:36:22" (1/1) ... [2022-01-31 08:36:22,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:36:22,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:36:22,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:36:22,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:36:22,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:36:22" (1/1) ... [2022-01-31 08:36:22,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:36:22,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:36:22,854 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 08:36:22,857 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 08:36:22,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:36:22,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:36:22,889 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:36:22,889 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-01-31 08:36:22,889 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:36:22,890 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:36:22,890 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:36:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:36:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:36:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:36:22,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:36:22,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:36:22,892 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-01-31 08:36:22,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:36:22,893 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:36:22,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:36:22,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:36:22,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:36:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:36:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:36:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:36:22,948 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:36:22,949 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:36:23,052 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:36:23,056 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:36:23,057 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 08:36:23,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:36:23 BoogieIcfgContainer [2022-01-31 08:36:23,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:36:23,058 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:36:23,058 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:36:23,059 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:36:23,074 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:36:23" (1/1) ... [2022-01-31 08:36:23,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:36:23 BasicIcfg [2022-01-31 08:36:23,096 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:36:23,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:36:23,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:36:23,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:36:23,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:36:22" (1/4) ... [2022-01-31 08:36:23,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a31bd44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:36:23, skipping insertion in model container [2022-01-31 08:36:23,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:36:22" (2/4) ... [2022-01-31 08:36:23,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a31bd44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:36:23, skipping insertion in model container [2022-01-31 08:36:23,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:36:23" (3/4) ... [2022-01-31 08:36:23,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a31bd44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:36:23, skipping insertion in model container [2022-01-31 08:36:23,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:36:23" (4/4) ... [2022-01-31 08:36:23,101 INFO L111 eAbstractionObserver]: Analyzing ICFG max60-2.iJordan [2022-01-31 08:36:23,104 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:36:23,104 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:36:23,140 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:36:23,160 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 08:36:23,160 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:36:23,171 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 23 states have (on average 1.391304347826087) internal successors, (32), 24 states have internal predecessors, (32), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 08:36:23,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:36:23,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:36:23,177 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:36:23,178 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:36:23,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:36:23,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1683381202, now seen corresponding path program 1 times [2022-01-31 08:36:23,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:36:23,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476025357] [2022-01-31 08:36:23,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:36:23,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:36:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:23,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:36:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:23,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:36:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:23,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 08:36:23,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:23,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:36:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 08:36:23,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:36:23,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476025357] [2022-01-31 08:36:23,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476025357] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:36:23,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:36:23,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:36:23,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839839937] [2022-01-31 08:36:23,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:36:23,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:36:23,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:36:23,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:36:23,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:36:23,428 INFO L87 Difference]: Start difference. First operand has 33 states, 23 states have (on average 1.391304347826087) internal successors, (32), 24 states have internal predecessors, (32), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:36:23,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:36:23,522 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-01-31 08:36:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:36:23,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-31 08:36:23,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:36:23,529 INFO L225 Difference]: With dead ends: 35 [2022-01-31 08:36:23,529 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 08:36:23,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:36:23,535 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 27 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:36:23,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 42 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:36:23,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 08:36:23,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-01-31 08:36:23,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:36:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-01-31 08:36:23,562 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 32 [2022-01-31 08:36:23,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:36:23,563 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-01-31 08:36:23,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:36:23,563 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-01-31 08:36:23,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 08:36:23,567 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:36:23,567 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:36:23,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:36:23,568 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:36:23,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:36:23,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1839782542, now seen corresponding path program 1 times [2022-01-31 08:36:23,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:36:23,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082452601] [2022-01-31 08:36:23,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:36:23,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:36:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:23,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:36:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:23,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:36:23,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:23,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 08:36:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:23,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 08:36:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 08:36:23,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:36:23,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082452601] [2022-01-31 08:36:23,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082452601] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:36:23,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037541921] [2022-01-31 08:36:23,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:36:23,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:36:23,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:36:23,708 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 08:36:23,709 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 08:36:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:23,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:36:23,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:36:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 08:36:23,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:36:23,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037541921] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:36:23,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:36:23,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-01-31 08:36:23,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143290350] [2022-01-31 08:36:23,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:36:23,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:36:23,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:36:23,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:36:23,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:36:23,886 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:36:23,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:36:23,895 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-01-31 08:36:23,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:36:23,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-01-31 08:36:23,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:36:23,897 INFO L225 Difference]: With dead ends: 33 [2022-01-31 08:36:23,897 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 08:36:23,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:36:23,898 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:36:23,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 58 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:36:23,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 08:36:23,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2022-01-31 08:36:23,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:36:23,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-01-31 08:36:23,903 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 34 [2022-01-31 08:36:23,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:36:23,904 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-01-31 08:36:23,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:36:23,904 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-01-31 08:36:23,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 08:36:23,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:36:23,905 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:36:23,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 08:36:24,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:36:24,128 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:36:24,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:36:24,128 INFO L85 PathProgramCache]: Analyzing trace with hash -956413876, now seen corresponding path program 1 times [2022-01-31 08:36:24,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:36:24,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267458092] [2022-01-31 08:36:24,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:36:24,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:36:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:24,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:36:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:24,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:36:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:24,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 08:36:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:24,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 08:36:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:24,284 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 08:36:24,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:36:24,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267458092] [2022-01-31 08:36:24,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267458092] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:36:24,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512974519] [2022-01-31 08:36:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:36:24,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:36:24,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:36:24,286 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 08:36:24,287 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 08:36:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:24,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:36:24,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:36:24,411 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 08:36:24,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:36:24,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512974519] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:36:24,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:36:24,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 08:36:24,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501593217] [2022-01-31 08:36:24,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:36:24,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:36:24,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:36:24,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:36:24,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:36:24,413 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:36:24,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:36:24,419 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-01-31 08:36:24,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:36:24,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2022-01-31 08:36:24,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:36:24,420 INFO L225 Difference]: With dead ends: 32 [2022-01-31 08:36:24,420 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 08:36:24,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:36:24,421 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:36:24,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 60 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:36:24,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 08:36:24,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-01-31 08:36:24,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:36:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-01-31 08:36:24,424 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 46 [2022-01-31 08:36:24,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:36:24,425 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-01-31 08:36:24,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:36:24,425 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-01-31 08:36:24,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 08:36:24,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:36:24,426 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:36:24,450 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 08:36:24,642 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,SelfDestructingSolverStorable2 [2022-01-31 08:36:24,642 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:36:24,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:36:24,642 INFO L85 PathProgramCache]: Analyzing trace with hash 60538376, now seen corresponding path program 1 times [2022-01-31 08:36:24,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:36:24,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866364166] [2022-01-31 08:36:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:36:24,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:36:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:24,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:36:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:24,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:36:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:24,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 08:36:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:24,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 08:36:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-31 08:36:24,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:36:24,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866364166] [2022-01-31 08:36:24,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866364166] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:36:24,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88088565] [2022-01-31 08:36:24,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:36:24,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:36:24,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:36:24,740 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 08:36:24,771 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 08:36:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:24,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:36:24,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:36:24,926 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-31 08:36:24,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:36:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-31 08:36:25,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88088565] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:36:25,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:36:25,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:36:25,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967329981] [2022-01-31 08:36:25,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:36:25,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:36:25,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:36:25,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:36:25,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:36:25,063 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:36:25,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:36:25,188 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-01-31 08:36:25,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:36:25,189 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2022-01-31 08:36:25,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:36:25,189 INFO L225 Difference]: With dead ends: 37 [2022-01-31 08:36:25,189 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 08:36:25,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 08:36:25,191 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:36:25,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 40 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:36:25,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 08:36:25,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-01-31 08:36:25,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:36:25,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-01-31 08:36:25,195 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 48 [2022-01-31 08:36:25,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:36:25,196 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-01-31 08:36:25,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:36:25,196 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-01-31 08:36:25,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 08:36:25,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:36:25,197 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:36:25,223 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 08:36:25,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:36:25,412 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:36:25,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:36:25,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1594696942, now seen corresponding path program 2 times [2022-01-31 08:36:25,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:36:25,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936164403] [2022-01-31 08:36:25,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:36:25,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:36:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:25,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:36:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:25,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 08:36:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:25,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 08:36:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:25,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 08:36:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-31 08:36:25,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:36:25,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936164403] [2022-01-31 08:36:25,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936164403] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:36:25,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452243976] [2022-01-31 08:36:25,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:36:25,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:36:25,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:36:25,507 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 08:36:25,528 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 08:36:25,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:36:25,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:36:25,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:36:25,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:36:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-31 08:36:25,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:36:25,793 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-31 08:36:25,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452243976] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:36:25,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:36:25,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-01-31 08:36:25,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6964575] [2022-01-31 08:36:25,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:36:25,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 08:36:25,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:36:25,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 08:36:25,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-31 08:36:25,795 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 08:36:25,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:36:25,997 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-01-31 08:36:25,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 08:36:25,998 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2022-01-31 08:36:25,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:36:25,999 INFO L225 Difference]: With dead ends: 56 [2022-01-31 08:36:25,999 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 08:36:26,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2022-01-31 08:36:26,000 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:36:26,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 37 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:36:26,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 08:36:26,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2022-01-31 08:36:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:36:26,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-01-31 08:36:26,007 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 54 [2022-01-31 08:36:26,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:36:26,007 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-01-31 08:36:26,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 08:36:26,008 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-01-31 08:36:26,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 08:36:26,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:36:26,009 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:36:26,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-31 08:36:26,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:36:26,219 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:36:26,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:36:26,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1025320980, now seen corresponding path program 3 times [2022-01-31 08:36:26,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:36:26,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751481470] [2022-01-31 08:36:26,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:36:26,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:36:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:26,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:36:26,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:26,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 08:36:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:26,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 08:36:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:26,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 08:36:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-01-31 08:36:26,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:36:26,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751481470] [2022-01-31 08:36:26,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751481470] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:36:26,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125398668] [2022-01-31 08:36:26,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:36:26,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:36:26,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:36:26,315 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 08:36:26,316 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 08:36:26,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:36:26,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:36:26,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 08:36:26,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:36:26,491 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-01-31 08:36:26,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:36:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-01-31 08:36:26,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125398668] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:36:26,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:36:26,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-01-31 08:36:26,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901602801] [2022-01-31 08:36:26,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:36:26,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 08:36:26,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:36:26,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 08:36:26,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-01-31 08:36:26,620 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 08:36:26,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:36:26,783 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2022-01-31 08:36:26,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 08:36:26,783 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 78 [2022-01-31 08:36:26,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:36:26,784 INFO L225 Difference]: With dead ends: 72 [2022-01-31 08:36:26,784 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 08:36:26,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-01-31 08:36:26,785 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 76 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:36:26,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 42 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:36:26,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 08:36:26,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-01-31 08:36:26,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 63 states have internal predecessors, (72), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:36:26,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2022-01-31 08:36:26,791 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 78 [2022-01-31 08:36:26,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:36:26,791 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2022-01-31 08:36:26,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 08:36:26,791 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2022-01-31 08:36:26,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-31 08:36:26,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:36:26,793 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:36:26,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 08:36:27,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:36:27,016 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:36:27,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:36:27,016 INFO L85 PathProgramCache]: Analyzing trace with hash 352696760, now seen corresponding path program 4 times [2022-01-31 08:36:27,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:36:27,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476005005] [2022-01-31 08:36:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:36:27,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:36:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:27,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:36:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:27,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 08:36:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:27,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 08:36:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:27,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-01-31 08:36:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-01-31 08:36:27,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:36:27,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476005005] [2022-01-31 08:36:27,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476005005] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:36:27,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734816954] [2022-01-31 08:36:27,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:36:27,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:36:27,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:36:27,225 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 08:36:27,227 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 08:36:27,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:36:27,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:36:27,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 08:36:27,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:36:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-01-31 08:36:27,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:36:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-01-31 08:36:27,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734816954] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:36:27,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:36:27,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-31 08:36:27,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867410120] [2022-01-31 08:36:27,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:36:27,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 08:36:27,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:36:27,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 08:36:27,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 08:36:27,761 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:36:28,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:36:28,112 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2022-01-31 08:36:28,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 08:36:28,114 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2022-01-31 08:36:28,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:36:28,115 INFO L225 Difference]: With dead ends: 95 [2022-01-31 08:36:28,115 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 08:36:28,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 08:36:28,116 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 65 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:36:28,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 50 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:36:28,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 08:36:28,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-01-31 08:36:28,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 87 states have (on average 1.103448275862069) internal successors, (96), 87 states have internal predecessors, (96), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:36:28,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2022-01-31 08:36:28,120 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 128 [2022-01-31 08:36:28,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:36:28,121 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2022-01-31 08:36:28,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:36:28,121 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2022-01-31 08:36:28,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 08:36:28,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:36:28,122 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 18, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:36:28,140 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 08:36:28,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:36:28,331 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:36:28,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:36:28,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1776268720, now seen corresponding path program 5 times [2022-01-31 08:36:28,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:36:28,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128332213] [2022-01-31 08:36:28,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:36:28,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:36:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:28,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:36:28,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:28,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 08:36:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:28,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 08:36:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:28,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-01-31 08:36:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-01-31 08:36:28,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:36:28,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128332213] [2022-01-31 08:36:28,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128332213] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:36:28,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927047547] [2022-01-31 08:36:28,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:36:28,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:36:28,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:36:28,653 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 08:36:28,654 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 08:36:29,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-01-31 08:36:29,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:36:29,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 08:36:29,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:36:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 316 proven. 66 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2022-01-31 08:36:29,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:36:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2022-01-31 08:36:30,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927047547] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:36:30,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:36:30,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 9] total 40 [2022-01-31 08:36:30,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930112592] [2022-01-31 08:36:30,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:36:30,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 08:36:30,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:36:30,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 08:36:30,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1139, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 08:36:30,289 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 40 states, 40 states have (on average 3.25) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:36:30,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:36:30,941 INFO L93 Difference]: Finished difference Result 130 states and 148 transitions. [2022-01-31 08:36:30,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 08:36:30,941 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.25) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 152 [2022-01-31 08:36:30,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:36:30,942 INFO L225 Difference]: With dead ends: 130 [2022-01-31 08:36:30,942 INFO L226 Difference]: Without dead ends: 130 [2022-01-31 08:36:30,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1257, Invalid=4595, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 08:36:30,944 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 236 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:36:30,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 47 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:36:30,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-31 08:36:30,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-01-31 08:36:30,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 121 states have (on average 1.140495867768595) internal successors, (138), 121 states have internal predecessors, (138), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:36:30,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2022-01-31 08:36:30,949 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 152 [2022-01-31 08:36:30,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:36:30,949 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2022-01-31 08:36:30,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.25) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:36:30,949 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2022-01-31 08:36:30,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-01-31 08:36:30,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:36:30,951 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 23, 23, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:36:30,971 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 08:36:31,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:36:31,168 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:36:31,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:36:31,168 INFO L85 PathProgramCache]: Analyzing trace with hash 531848002, now seen corresponding path program 6 times [2022-01-31 08:36:31,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:36:31,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905718380] [2022-01-31 08:36:31,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:36:31,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:36:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:31,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:36:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:31,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 08:36:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:31,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 08:36:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:31,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2022-01-31 08:36:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3589 trivial. 0 not checked. [2022-01-31 08:36:31,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:36:31,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905718380] [2022-01-31 08:36:31,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905718380] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:36:31,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741940169] [2022-01-31 08:36:31,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:36:31,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:36:31,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:36:31,533 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 08:36:31,534 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 08:36:31,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-31 08:36:31,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:36:31,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 08:36:31,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:36:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 1634 proven. 4 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2022-01-31 08:36:32,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:36:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4114 trivial. 0 not checked. [2022-01-31 08:36:32,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741940169] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:36:32,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:36:32,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 5, 5] total 33 [2022-01-31 08:36:32,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116363010] [2022-01-31 08:36:32,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:36:32,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 08:36:32,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:36:32,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 08:36:32,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 08:36:32,337 INFO L87 Difference]: Start difference. First operand 129 states and 147 transitions. Second operand has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 32 states have internal predecessors, (93), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:36:32,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:36:32,781 INFO L93 Difference]: Finished difference Result 140 states and 158 transitions. [2022-01-31 08:36:32,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 08:36:32,781 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 32 states have internal predecessors, (93), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 250 [2022-01-31 08:36:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:36:32,782 INFO L225 Difference]: With dead ends: 140 [2022-01-31 08:36:32,782 INFO L226 Difference]: Without dead ends: 140 [2022-01-31 08:36:32,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1056, Invalid=2850, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 08:36:32,783 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 84 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:36:32,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 53 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:36:32,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-31 08:36:32,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-01-31 08:36:32,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 131 states have (on average 1.1297709923664123) internal successors, (148), 131 states have internal predecessors, (148), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:36:32,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 157 transitions. [2022-01-31 08:36:32,792 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 157 transitions. Word has length 250 [2022-01-31 08:36:32,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:36:32,792 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 157 transitions. [2022-01-31 08:36:32,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 32 states have internal predecessors, (93), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:36:32,792 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 157 transitions. [2022-01-31 08:36:32,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-01-31 08:36:32,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:36:32,795 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 24, 24, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:36:32,813 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 08:36:33,006 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,SelfDestructingSolverStorable8 [2022-01-31 08:36:33,007 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:36:33,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:36:33,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1293066196, now seen corresponding path program 7 times [2022-01-31 08:36:33,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:36:33,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083708459] [2022-01-31 08:36:33,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:36:33,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:36:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:33,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:36:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:33,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 08:36:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:33,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 08:36:33,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:33,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-01-31 08:36:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-01-31 08:36:33,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:36:33,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083708459] [2022-01-31 08:36:33,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083708459] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:36:33,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413314791] [2022-01-31 08:36:33,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 08:36:33,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:36:33,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:36:33,515 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 08:36:33,516 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 08:36:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:33,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 08:36:33,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:36:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-01-31 08:36:33,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:36:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-01-31 08:36:34,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413314791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:36:34,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:36:34,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-01-31 08:36:34,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050835122] [2022-01-31 08:36:34,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:36:34,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 08:36:34,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:36:34,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 08:36:34,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 08:36:34,819 INFO L87 Difference]: Start difference. First operand 139 states and 157 transitions. Second operand has 54 states, 54 states have (on average 2.425925925925926) internal successors, (131), 53 states have internal predecessors, (131), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:36:35,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:36:35,780 INFO L93 Difference]: Finished difference Result 191 states and 209 transitions. [2022-01-31 08:36:35,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 08:36:35,780 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.425925925925926) internal successors, (131), 53 states have internal predecessors, (131), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 260 [2022-01-31 08:36:35,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:36:35,781 INFO L225 Difference]: With dead ends: 191 [2022-01-31 08:36:35,781 INFO L226 Difference]: Without dead ends: 191 [2022-01-31 08:36:35,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4031, Invalid=6681, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 08:36:35,797 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 146 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:36:35,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 50 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:36:35,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-31 08:36:35,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-01-31 08:36:35,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 183 states have (on average 1.092896174863388) internal successors, (200), 183 states have internal predecessors, (200), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:36:35,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 209 transitions. [2022-01-31 08:36:35,805 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 209 transitions. Word has length 260 [2022-01-31 08:36:35,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:36:35,805 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 209 transitions. [2022-01-31 08:36:35,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.425925925925926) internal successors, (131), 53 states have internal predecessors, (131), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:36:35,805 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 209 transitions. [2022-01-31 08:36:35,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2022-01-31 08:36:35,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:36:35,813 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:36:35,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 08:36:36,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 08:36:36,030 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:36:36,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:36:36,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1985220296, now seen corresponding path program 8 times [2022-01-31 08:36:36,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:36:36,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318023998] [2022-01-31 08:36:36,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:36:36,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:36:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:36,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:36:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:36,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-01-31 08:36:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:36,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 08:36:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:36,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2022-01-31 08:36:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:36,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-01-31 08:36:36,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:36:36,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318023998] [2022-01-31 08:36:36,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318023998] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:36:36,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99393861] [2022-01-31 08:36:36,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:36:36,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:36:36,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:36:36,842 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 08:36:36,863 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 08:36:37,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:36:37,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:36:37,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 1141 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-31 08:36:37,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:36:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-01-31 08:36:37,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:36:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-01-31 08:36:38,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99393861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:36:38,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:36:38,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 64 [2022-01-31 08:36:38,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591446821] [2022-01-31 08:36:38,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:36:38,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 08:36:38,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:36:38,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 08:36:38,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 08:36:38,200 INFO L87 Difference]: Start difference. First operand 191 states and 209 transitions. Second operand has 64 states, 64 states have (on average 2.390625) internal successors, (153), 63 states have internal predecessors, (153), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:36:39,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:36:39,715 INFO L93 Difference]: Finished difference Result 211 states and 229 transitions. [2022-01-31 08:36:39,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 08:36:39,715 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.390625) internal successors, (153), 63 states have internal predecessors, (153), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 312 [2022-01-31 08:36:39,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:36:39,716 INFO L225 Difference]: With dead ends: 211 [2022-01-31 08:36:39,716 INFO L226 Difference]: Without dead ends: 211 [2022-01-31 08:36:39,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 744 GetRequests, 621 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5736, Invalid=9516, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 08:36:39,719 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 141 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:36:39,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 55 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:36:39,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-31 08:36:39,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-01-31 08:36:39,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 203 states have (on average 1.083743842364532) internal successors, (220), 203 states have internal predecessors, (220), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:36:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 229 transitions. [2022-01-31 08:36:39,729 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 229 transitions. Word has length 312 [2022-01-31 08:36:39,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:36:39,730 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 229 transitions. [2022-01-31 08:36:39,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.390625) internal successors, (153), 63 states have internal predecessors, (153), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:36:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 229 transitions. [2022-01-31 08:36:39,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-01-31 08:36:39,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:36:39,734 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:36:39,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 08:36:39,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 08:36:39,954 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:36:39,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:36:39,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1216140700, now seen corresponding path program 9 times [2022-01-31 08:36:39,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:36:39,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311288399] [2022-01-31 08:36:39,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:36:39,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:36:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:40,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:36:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:40,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-01-31 08:36:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:40,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-01-31 08:36:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:40,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 267 [2022-01-31 08:36:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 0 proven. 2010 refuted. 0 times theorem prover too weak. 5211 trivial. 0 not checked. [2022-01-31 08:36:40,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:36:40,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311288399] [2022-01-31 08:36:40,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311288399] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:36:40,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158314549] [2022-01-31 08:36:40,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:36:40,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:36:40,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:36:40,331 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:36:40,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 08:36:40,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-31 08:36:40,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:36:40,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 08:36:40,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:36:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 1634 proven. 36 refuted. 0 times theorem prover too weak. 5551 trivial. 0 not checked. [2022-01-31 08:36:41,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:36:41,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7185 trivial. 0 not checked. [2022-01-31 08:36:41,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158314549] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:36:41,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:36:41,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 9] total 32 [2022-01-31 08:36:41,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496420836] [2022-01-31 08:36:41,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:36:41,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 08:36:41,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:36:41,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 08:36:41,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2022-01-31 08:36:41,577 INFO L87 Difference]: Start difference. First operand 211 states and 229 transitions. Second operand has 32 states, 32 states have (on average 3.71875) internal successors, (119), 31 states have internal predecessors, (119), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:36:41,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:36:41,987 INFO L93 Difference]: Finished difference Result 234 states and 254 transitions. [2022-01-31 08:36:41,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 08:36:41,987 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.71875) internal successors, (119), 31 states have internal predecessors, (119), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 332 [2022-01-31 08:36:41,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:36:41,989 INFO L225 Difference]: With dead ends: 234 [2022-01-31 08:36:41,989 INFO L226 Difference]: Without dead ends: 234 [2022-01-31 08:36:41,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 673 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=765, Invalid=2895, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 08:36:41,991 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 191 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:36:41,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 77 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:36:41,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-01-31 08:36:41,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 231. [2022-01-31 08:36:41,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 223 states have (on average 1.0807174887892377) internal successors, (241), 223 states have internal predecessors, (241), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:36:41,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 250 transitions. [2022-01-31 08:36:41,996 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 250 transitions. Word has length 332 [2022-01-31 08:36:41,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:36:41,996 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 250 transitions. [2022-01-31 08:36:41,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.71875) internal successors, (119), 31 states have internal predecessors, (119), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:36:41,997 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 250 transitions. [2022-01-31 08:36:41,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2022-01-31 08:36:41,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:36:41,999 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 45, 45, 45, 45, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:36:42,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 08:36:42,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 08:36:42,219 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:36:42,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:36:42,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1233125206, now seen corresponding path program 10 times [2022-01-31 08:36:42,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:36:42,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743227010] [2022-01-31 08:36:42,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:36:42,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:36:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:42,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:36:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:42,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-01-31 08:36:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:42,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-31 08:36:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:42,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 291 [2022-01-31 08:36:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7906 backedges. 0 proven. 2303 refuted. 0 times theorem prover too weak. 5603 trivial. 0 not checked. [2022-01-31 08:36:42,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:36:42,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743227010] [2022-01-31 08:36:42,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743227010] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:36:42,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918156340] [2022-01-31 08:36:42,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:36:42,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:36:42,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:36:42,633 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:36:42,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 08:36:42,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:36:42,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:36:42,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 1323 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 08:36:42,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:36:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7906 backedges. 1864 proven. 435 refuted. 0 times theorem prover too weak. 5607 trivial. 0 not checked. [2022-01-31 08:36:43,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:36:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7906 backedges. 0 proven. 2303 refuted. 0 times theorem prover too weak. 5603 trivial. 0 not checked. [2022-01-31 08:36:43,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918156340] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:36:43,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:36:43,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 35 [2022-01-31 08:36:43,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860029517] [2022-01-31 08:36:43,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:36:43,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 08:36:43,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:36:43,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 08:36:43,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 08:36:43,947 INFO L87 Difference]: Start difference. First operand 231 states and 250 transitions. Second operand has 35 states, 35 states have (on average 4.457142857142857) internal successors, (156), 34 states have internal predecessors, (156), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:36:44,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:36:44,493 INFO L93 Difference]: Finished difference Result 299 states and 335 transitions. [2022-01-31 08:36:44,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 08:36:44,494 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.457142857142857) internal successors, (156), 34 states have internal predecessors, (156), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 360 [2022-01-31 08:36:44,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:36:44,495 INFO L225 Difference]: With dead ends: 299 [2022-01-31 08:36:44,495 INFO L226 Difference]: Without dead ends: 299 [2022-01-31 08:36:44,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 744 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 08:36:44,496 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 394 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:36:44,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 44 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:36:44,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-31 08:36:44,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-01-31 08:36:44,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 291 states have (on average 1.120274914089347) internal successors, (326), 291 states have internal predecessors, (326), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:36:44,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 335 transitions. [2022-01-31 08:36:44,500 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 335 transitions. Word has length 360 [2022-01-31 08:36:44,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:36:44,500 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 335 transitions. [2022-01-31 08:36:44,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.457142857142857) internal successors, (156), 34 states have internal predecessors, (156), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:36:44,501 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 335 transitions. [2022-01-31 08:36:44,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2022-01-31 08:36:44,504 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:36:44,504 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 60, 60, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:36:44,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 08:36:44,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 08:36:44,723 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:36:44,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:36:44,723 INFO L85 PathProgramCache]: Analyzing trace with hash -722605616, now seen corresponding path program 11 times [2022-01-31 08:36:44,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:36:44,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456712445] [2022-01-31 08:36:44,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:36:44,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:36:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:44,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:36:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:44,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-01-31 08:36:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:45,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2022-01-31 08:36:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:45,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 427 [2022-01-31 08:36:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 22339 backedges. 0 proven. 10344 refuted. 0 times theorem prover too weak. 11995 trivial. 0 not checked. [2022-01-31 08:36:45,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:36:45,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456712445] [2022-01-31 08:36:45,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456712445] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:36:45,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442316572] [2022-01-31 08:36:45,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:36:45,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:36:45,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:36:45,384 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:36:45,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process