/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 10:02:16,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 10:02:16,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 10:02:16,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 10:02:16,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 10:02:16,699 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 10:02:16,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 10:02:16,701 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 10:02:16,702 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 10:02:16,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 10:02:16,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 10:02:16,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 10:02:16,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 10:02:16,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 10:02:16,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 10:02:16,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 10:02:16,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 10:02:16,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 10:02:16,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 10:02:16,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 10:02:16,731 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 10:02:16,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 10:02:16,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 10:02:16,737 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 10:02:16,739 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 10:02:16,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 10:02:16,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 10:02:16,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 10:02:16,761 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 10:02:16,772 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 10:02:16,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 10:02:16,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 10:02:16,774 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 10:02:16,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 10:02:16,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 10:02:16,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 10:02:16,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 10:02:16,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 10:02:16,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 10:02:16,775 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 10:02:16,775 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 10:02:16,775 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 10:02:16,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 10:02:16,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 10:02:16,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 10:02:16,776 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 10:02:16,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 10:02:16,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:02:16,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 10:02:16,776 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 10:02:16,778 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 10:02:16,778 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 10:02:16,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 10:02:16,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 10:02:16,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 10:02:16,994 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 10:02:16,995 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 10:02:16,995 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c [2022-01-31 10:02:17,036 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0356d2768/a86ac298ba3741cd9038a11f2d07aafe/FLAG07e9b6771 [2022-01-31 10:02:17,404 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 10:02:17,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c [2022-01-31 10:02:17,409 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0356d2768/a86ac298ba3741cd9038a11f2d07aafe/FLAG07e9b6771 [2022-01-31 10:02:17,422 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0356d2768/a86ac298ba3741cd9038a11f2d07aafe [2022-01-31 10:02:17,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 10:02:17,426 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 10:02:17,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 10:02:17,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 10:02:17,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 10:02:17,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:02:17" (1/1) ... [2022-01-31 10:02:17,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15553174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:02:17, skipping insertion in model container [2022-01-31 10:02:17,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:02:17" (1/1) ... [2022-01-31 10:02:17,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 10:02:17,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 10:02:17,620 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c[408,421] [2022-01-31 10:02:17,638 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:02:17,645 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 10:02:17,654 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c[408,421] [2022-01-31 10:02:17,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:02:17,680 INFO L208 MainTranslator]: Completed translation [2022-01-31 10:02:17,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:02:17 WrapperNode [2022-01-31 10:02:17,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 10:02:17,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 10:02:17,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 10:02:17,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 10:02:17,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:02:17" (1/1) ... [2022-01-31 10:02:17,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:02:17" (1/1) ... [2022-01-31 10:02:17,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:02:17" (1/1) ... [2022-01-31 10:02:17,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:02:17" (1/1) ... [2022-01-31 10:02:17,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:02:17" (1/1) ... [2022-01-31 10:02:17,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:02:17" (1/1) ... [2022-01-31 10:02:17,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:02:17" (1/1) ... [2022-01-31 10:02:17,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 10:02:17,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 10:02:17,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 10:02:17,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 10:02:17,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:02:17" (1/1) ... [2022-01-31 10:02:17,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:02:17,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:02:17,759 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 10:02:17,777 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 10:02:17,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 10:02:17,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 10:02:17,795 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 10:02:17,795 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 10:02:17,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 10:02:17,796 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 10:02:17,796 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 10:02:17,796 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 10:02:17,796 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 10:02:17,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 10:02:17,796 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 10:02:17,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 10:02:17,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-01-31 10:02:17,797 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 10:02:17,797 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 10:02:17,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 10:02:17,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 10:02:17,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 10:02:17,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 10:02:17,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 10:02:17,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 10:02:17,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 10:02:17,865 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 10:02:17,866 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 10:02:18,038 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 10:02:18,043 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 10:02:18,043 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-31 10:02:18,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:02:18 BoogieIcfgContainer [2022-01-31 10:02:18,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 10:02:18,045 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 10:02:18,045 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 10:02:18,047 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 10:02:18,049 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:02:18" (1/1) ... [2022-01-31 10:02:18,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:02:18 BasicIcfg [2022-01-31 10:02:18,071 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 10:02:18,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 10:02:18,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 10:02:18,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 10:02:18,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:02:17" (1/4) ... [2022-01-31 10:02:18,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473e541b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:02:18, skipping insertion in model container [2022-01-31 10:02:18,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:02:17" (2/4) ... [2022-01-31 10:02:18,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473e541b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:02:18, skipping insertion in model container [2022-01-31 10:02:18,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:02:18" (3/4) ... [2022-01-31 10:02:18,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473e541b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 10:02:18, skipping insertion in model container [2022-01-31 10:02:18,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:02:18" (4/4) ... [2022-01-31 10:02:18,077 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m2.cJordan [2022-01-31 10:02:18,081 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 10:02:18,081 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 10:02:18,116 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 10:02:18,122 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 10:02:18,122 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 10:02:18,132 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.52) internal successors, (38), 27 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:02:18,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 10:02:18,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:18,137 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:02:18,138 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:18,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:18,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1007829191, now seen corresponding path program 1 times [2022-01-31 10:02:18,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:18,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324957601] [2022-01-31 10:02:18,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:18,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:18,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:18,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:02:18,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:18,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324957601] [2022-01-31 10:02:18,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324957601] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:02:18,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:02:18,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 10:02:18,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804225792] [2022-01-31 10:02:18,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:02:18,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 10:02:18,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:02:18,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 10:02:18,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:02:18,342 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.52) internal successors, (38), 27 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:18,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:18,399 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-01-31 10:02:18,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 10:02:18,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 10:02:18,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:18,406 INFO L225 Difference]: With dead ends: 33 [2022-01-31 10:02:18,406 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 10:02:18,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:02:18,411 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:18,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 42 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:02:18,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 10:02:18,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-31 10:02:18,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:18,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-31 10:02:18,436 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2022-01-31 10:02:18,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:18,437 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-31 10:02:18,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:18,437 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-31 10:02:18,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 10:02:18,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:18,438 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:02:18,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 10:02:18,439 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:18,441 INFO L85 PathProgramCache]: Analyzing trace with hash 277756478, now seen corresponding path program 1 times [2022-01-31 10:02:18,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:18,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302269429] [2022-01-31 10:02:18,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:18,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:18,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:18,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:02:18,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:18,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302269429] [2022-01-31 10:02:18,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302269429] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:02:18,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:02:18,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 10:02:18,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162405359] [2022-01-31 10:02:18,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:02:18,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 10:02:18,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:02:18,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 10:02:18,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 10:02:18,516 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:18,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:18,573 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-01-31 10:02:18,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 10:02:18,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 10:02:18,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:18,574 INFO L225 Difference]: With dead ends: 28 [2022-01-31 10:02:18,574 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 10:02:18,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 10:02:18,575 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:18,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 35 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:02:18,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 10:02:18,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-31 10:02:18,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:18,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 10:02:18,578 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2022-01-31 10:02:18,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:18,579 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 10:02:18,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:18,579 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 10:02:18,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 10:02:18,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:18,580 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:02:18,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 10:02:18,580 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:18,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:18,580 INFO L85 PathProgramCache]: Analyzing trace with hash 33485499, now seen corresponding path program 1 times [2022-01-31 10:02:18,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:18,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048815725] [2022-01-31 10:02:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:18,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:18,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 10:02:18,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:18,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048815725] [2022-01-31 10:02:18,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048815725] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:02:18,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:02:18,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 10:02:18,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069326538] [2022-01-31 10:02:18,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:02:18,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 10:02:18,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:02:18,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 10:02:18,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 10:02:18,631 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:18,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:18,724 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-01-31 10:02:18,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 10:02:18,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 10:02:18,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:18,725 INFO L225 Difference]: With dead ends: 36 [2022-01-31 10:02:18,725 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 10:02:18,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 10:02:18,726 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:18,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 25 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:02:18,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 10:02:18,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2022-01-31 10:02:18,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:18,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-01-31 10:02:18,730 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2022-01-31 10:02:18,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:18,730 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-01-31 10:02:18,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:18,730 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-01-31 10:02:18,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 10:02:18,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:18,731 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:02:18,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 10:02:18,731 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:18,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:18,731 INFO L85 PathProgramCache]: Analyzing trace with hash -670231053, now seen corresponding path program 1 times [2022-01-31 10:02:18,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:18,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794443291] [2022-01-31 10:02:18,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:18,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:18,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:02:18,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:18,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794443291] [2022-01-31 10:02:18,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794443291] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:02:18,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214922542] [2022-01-31 10:02:18,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:18,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:18,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:02:18,835 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 10:02:18,870 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 10:02:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:18,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 10:02:18,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:02:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:02:19,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:02:19,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:02:19,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214922542] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:02:19,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:02:19,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 10:02:19,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149018607] [2022-01-31 10:02:19,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:02:19,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 10:02:19,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:02:19,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 10:02:19,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 10:02:19,094 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:19,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:19,148 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-01-31 10:02:19,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 10:02:19,148 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 10:02:19,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:19,151 INFO L225 Difference]: With dead ends: 34 [2022-01-31 10:02:19,151 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 10:02:19,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 10:02:19,158 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:19,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 41 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:02:19,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 10:02:19,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-01-31 10:02:19,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-01-31 10:02:19,168 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 30 [2022-01-31 10:02:19,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:19,168 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-01-31 10:02:19,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-01-31 10:02:19,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 10:02:19,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:19,171 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:02:19,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 10:02:19,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:19,386 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:19,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:19,387 INFO L85 PathProgramCache]: Analyzing trace with hash -777841104, now seen corresponding path program 2 times [2022-01-31 10:02:19,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:19,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666656302] [2022-01-31 10:02:19,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:19,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:19,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 10:02:19,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:19,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666656302] [2022-01-31 10:02:19,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666656302] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:02:19,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384724231] [2022-01-31 10:02:19,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:02:19,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:19,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:02:19,457 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 10:02:19,458 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 10:02:19,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:02:19,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:02:19,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 10:02:19,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:02:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 10:02:19,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:02:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 10:02:19,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384724231] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:02:19,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:02:19,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-31 10:02:19,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881163835] [2022-01-31 10:02:19,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:02:19,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 10:02:19,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:02:19,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 10:02:19,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:02:19,677 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:19,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:19,773 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-01-31 10:02:19,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 10:02:19,774 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 10:02:19,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:19,774 INFO L225 Difference]: With dead ends: 46 [2022-01-31 10:02:19,775 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 10:02:19,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-31 10:02:19,775 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:19,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 33 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:02:19,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 10:02:19,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2022-01-31 10:02:19,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-01-31 10:02:19,778 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2022-01-31 10:02:19,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:19,779 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-01-31 10:02:19,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:19,779 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-01-31 10:02:19,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 10:02:19,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:19,780 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:02:19,803 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 10:02:19,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:20,000 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:20,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:20,000 INFO L85 PathProgramCache]: Analyzing trace with hash -300784536, now seen corresponding path program 3 times [2022-01-31 10:02:20,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:20,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083511490] [2022-01-31 10:02:20,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:20,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:20,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:02:20,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:20,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083511490] [2022-01-31 10:02:20,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083511490] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:02:20,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701235411] [2022-01-31 10:02:20,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:02:20,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:20,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:02:20,787 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 10:02:20,805 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 10:02:20,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 10:02:20,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:02:20,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-31 10:02:20,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:02:20,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 10:02:22,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:02:22,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:22,629 INFO L353 Elim1Store]: treesize reduction 12, result has 68.4 percent of original size [2022-01-31 10:02:22,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 37 [2022-01-31 10:02:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:02:22,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:02:29,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2022-01-31 10:02:29,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:02:29,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 213 [2022-01-31 10:02:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:02:29,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701235411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:02:29,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:02:29,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29, 28] total 74 [2022-01-31 10:02:29,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351163161] [2022-01-31 10:02:29,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:02:29,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 10:02:29,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:02:29,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 10:02:29,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=4990, Unknown=1, NotChecked=0, Total=5402 [2022-01-31 10:02:29,554 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 74 states, 74 states have (on average 1.337837837837838) internal successors, (99), 71 states have internal predecessors, (99), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:30,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:30,624 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2022-01-31 10:02:30,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 10:02:30,625 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.337837837837838) internal successors, (99), 71 states have internal predecessors, (99), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 10:02:30,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:30,627 INFO L225 Difference]: With dead ends: 100 [2022-01-31 10:02:30,627 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 10:02:30,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 29 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2382 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=621, Invalid=7388, Unknown=1, NotChecked=0, Total=8010 [2022-01-31 10:02:30,630 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 369 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:30,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 228 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 207 Invalid, 0 Unknown, 369 Unchecked, 0.1s Time] [2022-01-31 10:02:30,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 10:02:30,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2022-01-31 10:02:30,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 63 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:30,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2022-01-31 10:02:30,635 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 40 [2022-01-31 10:02:30,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:30,635 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2022-01-31 10:02:30,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.337837837837838) internal successors, (99), 71 states have internal predecessors, (99), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:30,635 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2022-01-31 10:02:30,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 10:02:30,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:30,636 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:02:30,655 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 10:02:30,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:30,852 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:30,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:30,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1454907354, now seen corresponding path program 4 times [2022-01-31 10:02:30,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:30,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927602934] [2022-01-31 10:02:30,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:30,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:30,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:02:30,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:30,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927602934] [2022-01-31 10:02:30,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927602934] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:02:30,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637313009] [2022-01-31 10:02:30,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:02:30,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:30,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:02:30,950 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 10:02:30,959 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 10:02:30,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:02:30,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:02:30,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:02:31,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:02:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:02:31,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:02:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:02:31,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637313009] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:02:31,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:02:31,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-01-31 10:02:31,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572548584] [2022-01-31 10:02:31,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:02:31,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 10:02:31,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:02:31,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 10:02:31,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-31 10:02:31,173 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:31,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:31,350 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2022-01-31 10:02:31,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 10:02:31,351 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 10:02:31,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:31,352 INFO L225 Difference]: With dead ends: 116 [2022-01-31 10:02:31,352 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 10:02:31,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-01-31 10:02:31,353 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 101 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:31,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 35 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:02:31,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 10:02:31,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2022-01-31 10:02:31,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 72 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:31,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2022-01-31 10:02:31,358 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 42 [2022-01-31 10:02:31,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:31,358 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2022-01-31 10:02:31,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:31,358 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2022-01-31 10:02:31,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 10:02:31,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:31,359 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:02:31,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 10:02:31,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:31,576 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:31,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:31,576 INFO L85 PathProgramCache]: Analyzing trace with hash -954831645, now seen corresponding path program 5 times [2022-01-31 10:02:31,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:31,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475830894] [2022-01-31 10:02:31,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:31,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:31,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 10:02:31,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:31,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475830894] [2022-01-31 10:02:31,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475830894] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:02:31,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289831606] [2022-01-31 10:02:31,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:02:31,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:31,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:02:31,648 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 10:02:31,649 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 10:02:31,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 10:02:31,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:02:31,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:02:31,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:02:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 10:02:31,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:02:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 10:02:31,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289831606] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:02:31,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:02:31,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-01-31 10:02:31,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895937398] [2022-01-31 10:02:31,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:02:31,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 10:02:31,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:02:31,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 10:02:31,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-31 10:02:31,871 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:32,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:32,062 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-01-31 10:02:32,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 10:02:32,062 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 10:02:32,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:32,063 INFO L225 Difference]: With dead ends: 65 [2022-01-31 10:02:32,063 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 10:02:32,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-01-31 10:02:32,063 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 88 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:32,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 31 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:02:32,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 10:02:32,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2022-01-31 10:02:32,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:32,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-01-31 10:02:32,066 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 44 [2022-01-31 10:02:32,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:32,067 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-01-31 10:02:32,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:32,067 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-01-31 10:02:32,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 10:02:32,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:32,067 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-31 10:02:32,084 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 10:02:32,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:32,272 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:32,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:32,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1070549603, now seen corresponding path program 6 times [2022-01-31 10:02:32,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:32,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981185831] [2022-01-31 10:02:32,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:32,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:33,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:33,965 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:02:33,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:33,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981185831] [2022-01-31 10:02:33,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981185831] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:02:33,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439125782] [2022-01-31 10:02:33,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:02:33,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:33,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:02:33,967 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 10:02:33,968 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 10:02:34,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-31 10:02:34,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:02:34,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-31 10:02:34,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:02:35,427 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:02:35,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 8 [2022-01-31 10:02:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:02:35,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:02:37,293 INFO L353 Elim1Store]: treesize reduction 114, result has 46.0 percent of original size [2022-01-31 10:02:37,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 107 [2022-01-31 10:02:37,575 INFO L353 Elim1Store]: treesize reduction 198, result has 6.2 percent of original size [2022-01-31 10:02:37,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 24 [2022-01-31 10:02:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:02:37,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439125782] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:02:37,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:02:37,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 31, 32] total 95 [2022-01-31 10:02:37,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914198631] [2022-01-31 10:02:37,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:02:37,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 10:02:37,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:02:38,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 10:02:38,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=8474, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 10:02:38,001 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 95 states, 95 states have (on average 1.3157894736842106) internal successors, (125), 92 states have internal predecessors, (125), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:49,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:49,370 INFO L93 Difference]: Finished difference Result 159 states and 177 transitions. [2022-01-31 10:02:49,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 10:02:49,371 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.3157894736842106) internal successors, (125), 92 states have internal predecessors, (125), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 10:02:49,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:49,372 INFO L225 Difference]: With dead ends: 159 [2022-01-31 10:02:49,372 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 10:02:49,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7598 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=2147, Invalid=29715, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 10:02:49,377 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 170 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 3882 mSolverCounterSat, 744 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 4626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 744 IncrementalHoareTripleChecker+Valid, 3882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:49,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 264 Invalid, 4626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [744 Valid, 3882 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 10:02:49,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 10:02:49,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 92. [2022-01-31 10:02:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 87 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:49,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2022-01-31 10:02:49,382 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 50 [2022-01-31 10:02:49,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:49,382 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2022-01-31 10:02:49,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.3157894736842106) internal successors, (125), 92 states have internal predecessors, (125), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:49,383 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2022-01-31 10:02:49,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 10:02:49,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:49,383 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] [2022-01-31 10:02:49,400 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 10:02:49,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:49,595 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:49,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:49,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1388633541, now seen corresponding path program 7 times [2022-01-31 10:02:49,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:49,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030807871] [2022-01-31 10:02:49,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:49,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:49,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 10:02:49,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:49,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030807871] [2022-01-31 10:02:49,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030807871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:02:49,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812255578] [2022-01-31 10:02:49,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:02:49,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:49,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:02:49,683 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 10:02:49,683 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 10:02:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:49,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 10:02:49,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:02:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 10:02:49,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:02:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 10:02:49,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812255578] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:02:49,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:02:49,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-01-31 10:02:49,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969447299] [2022-01-31 10:02:49,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:02:49,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 10:02:49,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:02:49,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 10:02:49,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-31 10:02:49,965 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:50,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:50,137 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2022-01-31 10:02:50,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 10:02:50,138 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 10:02:50,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:50,138 INFO L225 Difference]: With dead ends: 122 [2022-01-31 10:02:50,139 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 10:02:50,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-01-31 10:02:50,139 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 103 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:50,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 45 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:02:50,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 10:02:50,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2022-01-31 10:02:50,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.1) internal successors, (77), 70 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:50,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2022-01-31 10:02:50,149 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 52 [2022-01-31 10:02:50,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:50,149 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2022-01-31 10:02:50,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:50,149 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2022-01-31 10:02:50,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 10:02:50,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:50,150 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2022-01-31 10:02:50,168 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 10:02:50,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:50,362 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:50,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:50,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1724271768, now seen corresponding path program 8 times [2022-01-31 10:02:50,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:50,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123569629] [2022-01-31 10:02:50,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:50,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:50,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 10:02:50,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:50,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123569629] [2022-01-31 10:02:50,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123569629] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:02:50,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762673758] [2022-01-31 10:02:50,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:02:50,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:50,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:02:50,453 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 10:02:50,454 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 10:02:50,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:02:50,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:02:50,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 10:02:50,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:02:50,620 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 10:02:50,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:02:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 10:02:50,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762673758] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:02:50,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:02:50,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-01-31 10:02:50,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627896373] [2022-01-31 10:02:50,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:02:50,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 10:02:50,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:02:50,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 10:02:50,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-31 10:02:50,709 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:50,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:02:50,928 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2022-01-31 10:02:50,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 10:02:50,928 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 10:02:50,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:02:50,930 INFO L225 Difference]: With dead ends: 65 [2022-01-31 10:02:50,930 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 10:02:50,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2022-01-31 10:02:50,930 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 87 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:02:50,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 55 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:02:50,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 10:02:50,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2022-01-31 10:02:50,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 56 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2022-01-31 10:02:50,933 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 54 [2022-01-31 10:02:50,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:02:50,933 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2022-01-31 10:02:50,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:02:50,933 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2022-01-31 10:02:50,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 10:02:50,934 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:02:50,934 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:02:50,951 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 10:02:51,139 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,SelfDestructingSolverStorable10 [2022-01-31 10:02:51,139 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:02:51,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:02:51,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1509516910, now seen corresponding path program 9 times [2022-01-31 10:02:51,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:02:51,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202593998] [2022-01-31 10:02:51,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:02:51,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:02:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:53,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:02:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:02:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:02:53,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:02:53,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202593998] [2022-01-31 10:02:53,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202593998] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:02:53,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043629044] [2022-01-31 10:02:53,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:02:53,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:02:53,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:02:53,456 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 10:02:53,463 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 10:02:53,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 10:02:53,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:02:53,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 86 conjunts are in the unsatisfiable core [2022-01-31 10:02:53,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:02:53,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 10:02:58,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:58,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:58,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:58,293 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:02:58,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 53 [2022-01-31 10:02:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:02:58,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:03:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 10:03:07,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043629044] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:03:07,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:03:07,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 41, 37] total 119 [2022-01-31 10:03:07,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281866669] [2022-01-31 10:03:07,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:03:07,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 10:03:07,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:03:07,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 10:03:07,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=13486, Unknown=2, NotChecked=0, Total=14042 [2022-01-31 10:03:07,489 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 119 states, 119 states have (on average 1.26890756302521) internal successors, (151), 116 states have internal predecessors, (151), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:14,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:03:14,471 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2022-01-31 10:03:14,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 10:03:14,471 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.26890756302521) internal successors, (151), 116 states have internal predecessors, (151), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 10:03:14,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:03:14,472 INFO L225 Difference]: With dead ends: 96 [2022-01-31 10:03:14,472 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 10:03:14,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7209 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=1235, Invalid=27833, Unknown=2, NotChecked=0, Total=29070 [2022-01-31 10:03:14,474 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 784 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:03:14,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 335 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 912 Invalid, 0 Unknown, 784 Unchecked, 0.4s Time] [2022-01-31 10:03:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 10:03:14,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2022-01-31 10:03:14,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 81 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:14,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2022-01-31 10:03:14,476 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 60 [2022-01-31 10:03:14,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:03:14,477 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2022-01-31 10:03:14,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.26890756302521) internal successors, (151), 116 states have internal predecessors, (151), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:14,477 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2022-01-31 10:03:14,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 10:03:14,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:03:14,477 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:03:14,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-31 10:03:14,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:03:14,691 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:03:14,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:03:14,692 INFO L85 PathProgramCache]: Analyzing trace with hash 723489488, now seen corresponding path program 10 times [2022-01-31 10:03:14,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:03:14,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044254765] [2022-01-31 10:03:14,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:03:14,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:03:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:14,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:03:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-31 10:03:14,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:03:14,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044254765] [2022-01-31 10:03:14,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044254765] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:03:14,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735610309] [2022-01-31 10:03:14,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:03:14,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:03:14,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:03:14,788 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 10:03:14,791 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 10:03:14,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:03:14,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:03:14,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 10:03:14,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:03:14,991 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-31 10:03:14,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:03:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-31 10:03:15,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735610309] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:03:15,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:03:15,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-01-31 10:03:15,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187744686] [2022-01-31 10:03:15,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:03:15,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 10:03:15,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:03:15,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 10:03:15,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-01-31 10:03:15,094 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:15,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:03:15,358 INFO L93 Difference]: Finished difference Result 144 states and 151 transitions. [2022-01-31 10:03:15,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 10:03:15,358 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 10:03:15,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:03:15,358 INFO L225 Difference]: With dead ends: 144 [2022-01-31 10:03:15,358 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 10:03:15,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-01-31 10:03:15,359 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 120 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:03:15,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 57 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:03:15,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 10:03:15,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 89. [2022-01-31 10:03:15,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 84 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:15,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2022-01-31 10:03:15,362 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 62 [2022-01-31 10:03:15,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:03:15,362 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2022-01-31 10:03:15,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:15,362 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2022-01-31 10:03:15,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 10:03:15,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:03:15,363 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:03:15,381 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 10:03:15,567 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,SelfDestructingSolverStorable12 [2022-01-31 10:03:15,567 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:03:15,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:03:15,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1226661645, now seen corresponding path program 11 times [2022-01-31 10:03:15,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:03:15,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576932380] [2022-01-31 10:03:15,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:03:15,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:03:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:15,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:03:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-31 10:03:15,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:03:15,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576932380] [2022-01-31 10:03:15,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576932380] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:03:15,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087166760] [2022-01-31 10:03:15,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:03:15,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:03:15,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:03:15,679 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 10:03:15,680 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 10:03:15,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-31 10:03:15,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:03:15,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 10:03:15,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:03:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-31 10:03:15,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:03:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-31 10:03:16,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087166760] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:03:16,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:03:16,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-01-31 10:03:16,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131563914] [2022-01-31 10:03:16,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:03:16,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 10:03:16,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:03:16,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 10:03:16,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-01-31 10:03:16,024 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:16,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:03:16,258 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2022-01-31 10:03:16,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 10:03:16,259 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 10:03:16,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:03:16,259 INFO L225 Difference]: With dead ends: 75 [2022-01-31 10:03:16,259 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 10:03:16,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2022-01-31 10:03:16,260 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 118 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:03:16,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 53 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:03:16,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 10:03:16,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2022-01-31 10:03:16,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 66 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:16,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2022-01-31 10:03:16,262 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 64 [2022-01-31 10:03:16,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:03:16,262 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2022-01-31 10:03:16,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:16,262 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2022-01-31 10:03:16,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 10:03:16,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:03:16,263 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:03:16,279 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 10:03:16,479 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,SelfDestructingSolverStorable13 [2022-01-31 10:03:16,479 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:03:16,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:03:16,480 INFO L85 PathProgramCache]: Analyzing trace with hash -2109824953, now seen corresponding path program 12 times [2022-01-31 10:03:16,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:03:16,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309136198] [2022-01-31 10:03:16,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:03:16,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:03:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:19,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:03:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 4 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:03:19,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:03:19,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309136198] [2022-01-31 10:03:19,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309136198] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:03:19,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571240392] [2022-01-31 10:03:19,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:03:19,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:03:19,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:03:19,652 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 10:03:19,652 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 10:03:19,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-31 10:03:19,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:03:19,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 104 conjunts are in the unsatisfiable core [2022-01-31 10:03:19,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:03:19,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 10:03:24,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:03:24,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 85 [2022-01-31 10:03:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 10:03:25,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:03:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 10:03:39,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571240392] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:03:39,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:03:39,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 51, 45] total 145 [2022-01-31 10:03:39,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655896202] [2022-01-31 10:03:39,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:03:39,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-01-31 10:03:39,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:03:39,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-01-31 10:03:39,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=20259, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 10:03:39,018 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 145 states, 145 states have (on average 1.2413793103448276) internal successors, (180), 142 states have internal predecessors, (180), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:48,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:03:48,167 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2022-01-31 10:03:48,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 10:03:48,167 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.2413793103448276) internal successors, (180), 142 states have internal predecessors, (180), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 10:03:48,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:03:48,168 INFO L225 Difference]: With dead ends: 112 [2022-01-31 10:03:48,168 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 10:03:48,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10021 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=1466, Invalid=40354, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 10:03:48,170 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 2499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1312 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 10:03:48,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 449 Invalid, 2499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1101 Invalid, 0 Unknown, 1312 Unchecked, 0.6s Time] [2022-01-31 10:03:48,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 10:03:48,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2022-01-31 10:03:48,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 95 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:48,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2022-01-31 10:03:48,173 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 70 [2022-01-31 10:03:48,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:03:48,173 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2022-01-31 10:03:48,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.2413793103448276) internal successors, (180), 142 states have internal predecessors, (180), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:48,173 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2022-01-31 10:03:48,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 10:03:48,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:03:48,174 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:03:48,195 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 10:03:48,387 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,SelfDestructingSolverStorable14 [2022-01-31 10:03:48,387 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:03:48,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:03:48,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1756311483, now seen corresponding path program 13 times [2022-01-31 10:03:48,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:03:48,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955364160] [2022-01-31 10:03:48,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:03:48,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:03:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:48,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:03:48,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-31 10:03:48,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:03:48,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955364160] [2022-01-31 10:03:48,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955364160] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:03:48,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885158974] [2022-01-31 10:03:48,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:03:48,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:03:48,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:03:48,493 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 10:03:48,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 10:03:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:48,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 10:03:48,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:03:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-31 10:03:48,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:03:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-31 10:03:48,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885158974] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:03:48,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:03:48,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-01-31 10:03:48,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690171612] [2022-01-31 10:03:48,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:03:48,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 10:03:48,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:03:48,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 10:03:48,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2022-01-31 10:03:48,814 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:49,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:03:49,073 INFO L93 Difference]: Finished difference Result 166 states and 173 transitions. [2022-01-31 10:03:49,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 10:03:49,073 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 10:03:49,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:03:49,074 INFO L225 Difference]: With dead ends: 166 [2022-01-31 10:03:49,074 INFO L226 Difference]: Without dead ends: 117 [2022-01-31 10:03:49,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2022-01-31 10:03:49,075 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 194 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:03:49,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 37 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:03:49,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-31 10:03:49,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2022-01-31 10:03:49,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0714285714285714) internal successors, (105), 98 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:49,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 109 transitions. [2022-01-31 10:03:49,077 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 109 transitions. Word has length 72 [2022-01-31 10:03:49,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:03:49,077 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 109 transitions. [2022-01-31 10:03:49,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:49,077 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 109 transitions. [2022-01-31 10:03:49,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 10:03:49,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:03:49,078 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:03:49,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 10:03:49,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 10:03:49,290 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:03:49,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:03:49,290 INFO L85 PathProgramCache]: Analyzing trace with hash -704760766, now seen corresponding path program 14 times [2022-01-31 10:03:49,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:03:49,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088630605] [2022-01-31 10:03:49,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:03:49,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:03:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:49,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:03:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-01-31 10:03:49,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:03:49,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088630605] [2022-01-31 10:03:49,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088630605] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:03:49,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743140716] [2022-01-31 10:03:49,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:03:49,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:03:49,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:03:49,402 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:03:49,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 10:03:49,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:03:49,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:03:49,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 10:03:49,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:03:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-01-31 10:03:49,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:03:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-01-31 10:03:49,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743140716] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:03:49,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:03:49,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-01-31 10:03:49,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399891910] [2022-01-31 10:03:49,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:03:49,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 10:03:49,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:03:49,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 10:03:49,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2022-01-31 10:03:49,772 INFO L87 Difference]: Start difference. First operand 103 states and 109 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:03:50,091 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2022-01-31 10:03:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 10:03:50,092 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 10:03:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:03:50,092 INFO L225 Difference]: With dead ends: 85 [2022-01-31 10:03:50,092 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 10:03:50,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=281, Invalid=1051, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 10:03:50,093 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 170 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:03:50,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 45 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:03:50,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 10:03:50,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2022-01-31 10:03:50,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 76 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:50,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-01-31 10:03:50,095 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 74 [2022-01-31 10:03:50,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:03:50,095 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-01-31 10:03:50,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:50,095 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-01-31 10:03:50,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 10:03:50,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:03:50,096 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:03:50,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 10:03:50,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:03:50,303 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:03:50,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:03:50,304 INFO L85 PathProgramCache]: Analyzing trace with hash 596597180, now seen corresponding path program 15 times [2022-01-31 10:03:50,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:03:50,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548605845] [2022-01-31 10:03:50,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:03:50,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:03:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:54,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:03:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 4 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:03:54,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:03:54,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548605845] [2022-01-31 10:03:54,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548605845] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:03:54,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394116734] [2022-01-31 10:03:54,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:03:54,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:03:54,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:03:54,637 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:03:54,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 10:03:54,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-31 10:03:54,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:03:54,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 120 conjunts are in the unsatisfiable core [2022-01-31 10:03:54,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:04:03,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:03,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:03,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:03,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:03,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:03,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:03,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:03,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:03,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:04:03,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:04:03,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 103 [2022-01-31 10:04:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 7 proven. 164 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 10:04:04,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:04:23,515 INFO L353 Elim1Store]: treesize reduction 710, result has 31.4 percent of original size [2022-01-31 10:04:23,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 222 treesize of output 359 [2022-01-31 10:04:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 10:04:42,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394116734] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:04:42,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:04:42,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 58, 53] total 170 [2022-01-31 10:04:42,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795803891] [2022-01-31 10:04:42,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:04:42,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-01-31 10:04:42,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:04:42,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-01-31 10:04:42,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=27539, Unknown=1, NotChecked=0, Total=28730 [2022-01-31 10:04:42,063 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 170 states, 170 states have (on average 1.2) internal successors, (204), 167 states have internal predecessors, (204), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:04:57,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:04:57,261 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2022-01-31 10:04:57,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 10:04:57,261 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 1.2) internal successors, (204), 167 states have internal predecessors, (204), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 10:04:57,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:04:57,262 INFO L225 Difference]: With dead ends: 129 [2022-01-31 10:04:57,262 INFO L226 Difference]: Without dead ends: 126 [2022-01-31 10:04:57,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14076 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=2541, Invalid=55780, Unknown=1, NotChecked=0, Total=58322 [2022-01-31 10:04:57,265 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 35 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 1589 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 3545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1839 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 10:04:57,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 439 Invalid, 3545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1589 Invalid, 0 Unknown, 1839 Unchecked, 0.8s Time] [2022-01-31 10:04:57,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-01-31 10:04:57,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 114. [2022-01-31 10:04:57,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.073394495412844) internal successors, (117), 109 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:04:57,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2022-01-31 10:04:57,267 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 80 [2022-01-31 10:04:57,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:04:57,268 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2022-01-31 10:04:57,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 1.2) internal successors, (204), 167 states have internal predecessors, (204), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:04:57,268 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2022-01-31 10:04:57,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 10:04:57,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:04:57,268 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:04:57,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 10:04:57,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 10:04:57,473 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:04:57,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:04:57,474 INFO L85 PathProgramCache]: Analyzing trace with hash -641396614, now seen corresponding path program 16 times [2022-01-31 10:04:57,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:04:57,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292917513] [2022-01-31 10:04:57,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:04:57,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:04:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:04:57,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:04:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:04:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-01-31 10:04:57,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:04:57,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292917513] [2022-01-31 10:04:57,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292917513] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:04:57,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491418156] [2022-01-31 10:04:57,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:04:57,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:04:57,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:04:57,605 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:04:57,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 10:04:57,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:04:57,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:04:57,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 10:04:57,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:04:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-01-31 10:04:57,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:04:58,018 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-01-31 10:04:58,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491418156] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:04:58,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:04:58,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2022-01-31 10:04:58,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640934519] [2022-01-31 10:04:58,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:04:58,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 10:04:58,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:04:58,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 10:04:58,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-01-31 10:04:58,019 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:04:58,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:04:58,325 INFO L93 Difference]: Finished difference Result 188 states and 195 transitions. [2022-01-31 10:04:58,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 10:04:58,325 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 10:04:58,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:04:58,326 INFO L225 Difference]: With dead ends: 188 [2022-01-31 10:04:58,326 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 10:04:58,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=914, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 10:04:58,327 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 209 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:04:58,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 47 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:04:58,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 10:04:58,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 117. [2022-01-31 10:04:58,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0625) internal successors, (119), 112 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:04:58,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 123 transitions. [2022-01-31 10:04:58,329 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 123 transitions. Word has length 82 [2022-01-31 10:04:58,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:04:58,329 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 123 transitions. [2022-01-31 10:04:58,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:04:58,330 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 123 transitions. [2022-01-31 10:04:58,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 10:04:58,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:04:58,330 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:04:58,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 10:04:58,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:04:58,539 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:04:58,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:04:58,540 INFO L85 PathProgramCache]: Analyzing trace with hash -78160841, now seen corresponding path program 17 times [2022-01-31 10:04:58,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:04:58,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696449258] [2022-01-31 10:04:58,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:04:58,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:04:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:04:58,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:04:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:04:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-01-31 10:04:58,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:04:58,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696449258] [2022-01-31 10:04:58,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696449258] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:04:58,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667364483] [2022-01-31 10:04:58,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:04:58,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:04:58,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:04:58,658 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:04:58,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 10:04:58,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-31 10:04:58,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:04:58,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 10:04:58,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:04:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-01-31 10:04:59,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:04:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-01-31 10:04:59,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667364483] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:04:59,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:04:59,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2022-01-31 10:04:59,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753650151] [2022-01-31 10:04:59,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:04:59,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 10:04:59,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:04:59,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 10:04:59,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-01-31 10:04:59,124 INFO L87 Difference]: Start difference. First operand 117 states and 123 transitions. Second operand has 27 states, 27 states have (on average 3.6666666666666665) internal successors, (99), 26 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:04:59,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:04:59,492 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2022-01-31 10:04:59,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 10:04:59,492 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.6666666666666665) internal successors, (99), 26 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-01-31 10:04:59,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:04:59,493 INFO L225 Difference]: With dead ends: 95 [2022-01-31 10:04:59,493 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 10:04:59,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=359, Invalid=1363, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 10:04:59,493 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 150 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:04:59,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 53 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 10:04:59,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 10:04:59,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2022-01-31 10:04:59,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.058139534883721) internal successors, (91), 86 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:04:59,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2022-01-31 10:04:59,495 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 84 [2022-01-31 10:04:59,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:04:59,495 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2022-01-31 10:04:59,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.6666666666666665) internal successors, (99), 26 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:04:59,495 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2022-01-31 10:04:59,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 10:04:59,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:04:59,496 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:04:59,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 10:04:59,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:04:59,707 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:04:59,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:04:59,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1706776049, now seen corresponding path program 18 times [2022-01-31 10:04:59,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:04:59,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634013293] [2022-01-31 10:04:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:04:59,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:04:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:05:05,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:05:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:05:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 16 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:05:05,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:05:05,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634013293] [2022-01-31 10:05:05,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634013293] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:05:05,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391235542] [2022-01-31 10:05:05,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:05:05,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:05:05,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:05:05,357 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:05:05,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 10:05:05,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-31 10:05:05,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:05:05,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 140 conjunts are in the unsatisfiable core [2022-01-31 10:05:05,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:05:05,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 10:05:19,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:05:19,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:05:19,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 100 treesize of output 361 [2022-01-31 10:05:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 11 proven. 209 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 10:05:20,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:05:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 10:05:50,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391235542] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:05:50,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:05:50,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 65, 61] total 195 [2022-01-31 10:05:50,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750830125] [2022-01-31 10:05:50,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:05:50,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2022-01-31 10:05:50,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:05:50,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2022-01-31 10:05:50,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1293, Invalid=36537, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 10:05:50,783 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 195 states, 195 states have (on average 1.1743589743589744) internal successors, (229), 192 states have internal predecessors, (229), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:06:19,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:06:19,036 INFO L93 Difference]: Finished difference Result 144 states and 151 transitions. [2022-01-31 10:06:19,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 10:06:19,037 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 1.1743589743589744) internal successors, (229), 192 states have internal predecessors, (229), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-01-31 10:06:19,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:06:19,038 INFO L225 Difference]: With dead ends: 144 [2022-01-31 10:06:19,038 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 10:06:19,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17416 ImplicationChecksByTransitivity, 68.1s TimeCoverageRelationStatistics Valid=2908, Invalid=73544, Unknown=0, NotChecked=0, Total=76452 [2022-01-31 10:06:19,041 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 3791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2147 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 10:06:19,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 582 Invalid, 3791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1546 Invalid, 0 Unknown, 2147 Unchecked, 0.9s Time] [2022-01-31 10:06:19,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 10:06:19,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 128. [2022-01-31 10:06:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.065040650406504) internal successors, (131), 123 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:06:19,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 135 transitions. [2022-01-31 10:06:19,043 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 135 transitions. Word has length 90 [2022-01-31 10:06:19,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:06:19,043 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 135 transitions. [2022-01-31 10:06:19,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 1.1743589743589744) internal successors, (229), 192 states have internal predecessors, (229), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:06:19,044 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 135 transitions. [2022-01-31 10:06:19,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 10:06:19,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:06:19,044 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:06:19,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-01-31 10:06:19,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:06:19,255 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:06:19,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:06:19,256 INFO L85 PathProgramCache]: Analyzing trace with hash 232448879, now seen corresponding path program 19 times [2022-01-31 10:06:19,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:06:19,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841459862] [2022-01-31 10:06:19,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:06:19,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:06:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:06:19,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:06:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:06:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-01-31 10:06:19,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:06:19,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841459862] [2022-01-31 10:06:19,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841459862] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:06:19,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271373387] [2022-01-31 10:06:19,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:06:19,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:06:19,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:06:19,398 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:06:19,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-31 10:06:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:06:19,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 10:06:19,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:06:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-01-31 10:06:19,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:06:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-01-31 10:06:19,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271373387] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:06:19,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:06:19,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-01-31 10:06:19,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336186501] [2022-01-31 10:06:19,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:06:19,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 10:06:19,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:06:19,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 10:06:19,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2022-01-31 10:06:19,869 INFO L87 Difference]: Start difference. First operand 128 states and 135 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:06:20,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:06:20,210 INFO L93 Difference]: Finished difference Result 210 states and 217 transitions. [2022-01-31 10:06:20,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 10:06:20,212 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-01-31 10:06:20,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:06:20,213 INFO L225 Difference]: With dead ends: 210 [2022-01-31 10:06:20,213 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 10:06:20,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=341, Invalid=1141, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 10:06:20,214 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 278 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:06:20,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 43 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 10:06:20,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 10:06:20,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 131. [2022-01-31 10:06:20,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0555555555555556) internal successors, (133), 126 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:06:20,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 137 transitions. [2022-01-31 10:06:20,216 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 137 transitions. Word has length 92 [2022-01-31 10:06:20,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:06:20,216 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 137 transitions. [2022-01-31 10:06:20,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:06:20,216 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 137 transitions. [2022-01-31 10:06:20,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 10:06:20,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:06:20,217 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:06:20,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-31 10:06:20,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:06:20,423 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:06:20,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:06:20,424 INFO L85 PathProgramCache]: Analyzing trace with hash -836540692, now seen corresponding path program 20 times [2022-01-31 10:06:20,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:06:20,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649529012] [2022-01-31 10:06:20,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:06:20,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:06:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:06:20,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:06:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:06:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-01-31 10:06:20,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:06:20,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649529012] [2022-01-31 10:06:20,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649529012] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:06:20,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41982507] [2022-01-31 10:06:20,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:06:20,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:06:20,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:06:20,564 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:06:20,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-31 10:06:20,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:06:20,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:06:20,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 10:06:20,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:06:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-01-31 10:06:20,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:06:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-01-31 10:06:21,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41982507] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:06:21,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:06:21,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-01-31 10:06:21,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140318611] [2022-01-31 10:06:21,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:06:21,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 10:06:21,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:06:21,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 10:06:21,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2022-01-31 10:06:21,031 INFO L87 Difference]: Start difference. First operand 131 states and 137 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:06:21,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:06:21,450 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2022-01-31 10:06:21,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 10:06:21,450 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-01-31 10:06:21,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:06:21,450 INFO L225 Difference]: With dead ends: 105 [2022-01-31 10:06:21,450 INFO L226 Difference]: Without dead ends: 105 [2022-01-31 10:06:21,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=447, Invalid=1715, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 10:06:21,451 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 226 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:06:21,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 53 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 10:06:21,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-31 10:06:21,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2022-01-31 10:06:21,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 96 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:06:21,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-01-31 10:06:21,453 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 94 [2022-01-31 10:06:21,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:06:21,453 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-01-31 10:06:21,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:06:21,454 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-01-31 10:06:21,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 10:06:21,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:06:21,454 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:06:21,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-31 10:06:21,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-31 10:06:21,670 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:06:21,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:06:21,671 INFO L85 PathProgramCache]: Analyzing trace with hash 311502054, now seen corresponding path program 21 times [2022-01-31 10:06:21,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:06:21,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990642321] [2022-01-31 10:06:21,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:06:21,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:06:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:06:28,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:06:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:06:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 36 proven. 284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:06:28,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:06:28,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990642321] [2022-01-31 10:06:28,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990642321] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:06:28,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925842231] [2022-01-31 10:06:28,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:06:28,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:06:28,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:06:28,775 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:06:28,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 10:06:28,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-31 10:06:28,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:06:28,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 158 conjunts are in the unsatisfiable core [2022-01-31 10:06:28,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:06:29,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 10:06:47,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,651 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:06:47,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 72 treesize of output 163 [2022-01-31 10:06:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 9 proven. 295 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 10:06:48,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:07:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 10:07:27,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925842231] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:07:27,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:07:27,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 75, 69] total 224 [2022-01-31 10:07:27,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541283686] [2022-01-31 10:07:27,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:07:27,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 224 states [2022-01-31 10:07:27,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:07:27,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2022-01-31 10:07:27,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1878, Invalid=48072, Unknown=2, NotChecked=0, Total=49952 [2022-01-31 10:07:27,085 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 224 states, 224 states have (on average 1.15625) internal successors, (259), 221 states have internal predecessors, (259), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:07:57,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:07:57,576 INFO L93 Difference]: Finished difference Result 161 states and 168 transitions. [2022-01-31 10:07:57,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 10:07:57,576 INFO L78 Accepts]: Start accepts. Automaton has has 224 states, 224 states have (on average 1.15625) internal successors, (259), 221 states have internal predecessors, (259), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-01-31 10:07:57,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:07:57,577 INFO L225 Difference]: With dead ends: 161 [2022-01-31 10:07:57,577 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 10:07:57,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 64 SyntacticMatches, 7 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29699 ImplicationChecksByTransitivity, 81.5s TimeCoverageRelationStatistics Valid=4205, Invalid=95333, Unknown=2, NotChecked=0, Total=99540 [2022-01-31 10:07:57,581 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 1996 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 5451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3277 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:07:57,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 556 Invalid, 5451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1996 Invalid, 0 Unknown, 3277 Unchecked, 1.2s Time] [2022-01-31 10:07:57,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 10:07:57,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 142. [2022-01-31 10:07:57,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0583941605839415) internal successors, (145), 137 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:07:57,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2022-01-31 10:07:57,584 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 100 [2022-01-31 10:07:57,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:07:57,584 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2022-01-31 10:07:57,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 224 states, 224 states have (on average 1.15625) internal successors, (259), 221 states have internal predecessors, (259), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:07:57,584 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2022-01-31 10:07:57,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 10:07:57,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:07:57,585 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:07:57,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-31 10:07:57,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-31 10:07:57,785 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:07:57,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:07:57,786 INFO L85 PathProgramCache]: Analyzing trace with hash 704436516, now seen corresponding path program 22 times [2022-01-31 10:07:57,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:07:57,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021633115] [2022-01-31 10:07:57,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:07:57,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:07:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:07:57,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:07:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:07:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-01-31 10:07:57,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:07:57,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021633115] [2022-01-31 10:07:57,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021633115] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:07:57,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663216054] [2022-01-31 10:07:57,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:07:57,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:07:57,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:07:57,971 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:07:57,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-31 10:07:58,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:07:58,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:07:58,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 10:07:58,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:07:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-01-31 10:07:58,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:07:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-01-31 10:07:58,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663216054] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:07:58,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:07:58,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 33 [2022-01-31 10:07:58,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633669279] [2022-01-31 10:07:58,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:07:58,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 10:07:58,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:07:58,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 10:07:58,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 10:07:58,473 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:07:58,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:07:58,858 INFO L93 Difference]: Finished difference Result 232 states and 239 transitions. [2022-01-31 10:07:58,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 10:07:58,859 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 10:07:58,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:07:58,859 INFO L225 Difference]: With dead ends: 232 [2022-01-31 10:07:58,859 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 10:07:58,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=413, Invalid=1393, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 10:07:58,860 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 299 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:07:58,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 39 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 10:07:58,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 10:07:58,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 145. [2022-01-31 10:07:58,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.05) internal successors, (147), 140 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:07:58,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 151 transitions. [2022-01-31 10:07:58,862 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 151 transitions. Word has length 102 [2022-01-31 10:07:58,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:07:58,863 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 151 transitions. [2022-01-31 10:07:58,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:07:58,863 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 151 transitions. [2022-01-31 10:07:58,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 10:07:58,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:07:58,863 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:07:58,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-31 10:07:59,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:07:59,079 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:07:59,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:07:59,080 INFO L85 PathProgramCache]: Analyzing trace with hash -345447327, now seen corresponding path program 23 times [2022-01-31 10:07:59,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:07:59,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186438510] [2022-01-31 10:07:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:07:59,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:07:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:07:59,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:07:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:07:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-01-31 10:07:59,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:07:59,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186438510] [2022-01-31 10:07:59,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186438510] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:07:59,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668688586] [2022-01-31 10:07:59,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:07:59,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:07:59,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:07:59,260 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:07:59,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-31 10:07:59,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-01-31 10:07:59,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:07:59,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 10:07:59,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:07:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-01-31 10:07:59,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:07:59,884 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-01-31 10:07:59,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668688586] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:07:59,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:07:59,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 33 [2022-01-31 10:07:59,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354709988] [2022-01-31 10:07:59,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:07:59,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 10:07:59,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:07:59,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 10:07:59,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 10:07:59,886 INFO L87 Difference]: Start difference. First operand 145 states and 151 transitions. Second operand has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 32 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:08:00,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:08:00,375 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2022-01-31 10:08:00,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 10:08:00,376 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 32 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-01-31 10:08:00,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:08:00,376 INFO L225 Difference]: With dead ends: 115 [2022-01-31 10:08:00,376 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 10:08:00,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 197 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=545, Invalid=2107, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 10:08:00,377 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 201 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:08:00,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 53 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 10:08:00,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 10:08:00,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2022-01-31 10:08:00,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0471698113207548) internal successors, (111), 106 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:08:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2022-01-31 10:08:00,392 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 104 [2022-01-31 10:08:00,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:08:00,392 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2022-01-31 10:08:00,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 32 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:08:00,392 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2022-01-31 10:08:00,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 10:08:00,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:08:00,392 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:08:00,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-31 10:08:00,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:08:00,593 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:08:00,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:08:00,593 INFO L85 PathProgramCache]: Analyzing trace with hash -2098506085, now seen corresponding path program 24 times [2022-01-31 10:08:00,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:08:00,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382021519] [2022-01-31 10:08:00,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:08:00,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:08:00,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:08:10,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:08:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:08:10,321 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 25 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:08:10,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:08:10,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382021519] [2022-01-31 10:08:10,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382021519] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:08:10,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914235780] [2022-01-31 10:08:10,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:08:10,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:08:10,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:08:10,323 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:08:10,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-31 10:08:10,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-01-31 10:08:10,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:08:10,464 WARN L261 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 182 conjunts are in the unsatisfiable core [2022-01-31 10:08:10,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:08:11,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 10:08:11,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 10:08:11,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 10:08:28,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:28,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:28,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:28,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:08:28,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2022-01-31 10:08:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 4 proven. 399 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 10:08:29,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:08:38,523 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-01-31 10:08:38,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-01-31 10:08:38,524 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2022-01-31 10:08:38,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-31 10:08:38,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-31 10:08:38,726 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:934) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 47 more [2022-01-31 10:08:38,728 INFO L158 Benchmark]: Toolchain (without parser) took 381302.97ms. Allocated memory was 176.2MB in the beginning and 405.8MB in the end (delta: 229.6MB). Free memory was 127.9MB in the beginning and 191.6MB in the end (delta: -63.7MB). Peak memory consumption was 166.5MB. Max. memory is 8.0GB. [2022-01-31 10:08:38,729 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 176.2MB. Free memory was 144.5MB in the beginning and 144.4MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 10:08:38,729 INFO L158 Benchmark]: CACSL2BoogieTranslator took 253.00ms. Allocated memory is still 176.2MB. Free memory was 127.6MB in the beginning and 153.9MB in the end (delta: -26.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-01-31 10:08:38,729 INFO L158 Benchmark]: Boogie Preprocessor took 43.04ms. Allocated memory is still 176.2MB. Free memory was 153.9MB in the beginning and 152.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 10:08:38,729 INFO L158 Benchmark]: RCFGBuilder took 318.68ms. Allocated memory is still 176.2MB. Free memory was 152.3MB in the beginning and 140.3MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-31 10:08:38,729 INFO L158 Benchmark]: IcfgTransformer took 26.14ms. Allocated memory is still 176.2MB. Free memory was 140.3MB in the beginning and 138.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 10:08:38,729 INFO L158 Benchmark]: TraceAbstraction took 380656.03ms. Allocated memory was 176.2MB in the beginning and 405.8MB in the end (delta: 229.6MB). Free memory was 138.2MB in the beginning and 191.6MB in the end (delta: -53.4MB). Peak memory consumption was 177.6MB. Max. memory is 8.0GB. [2022-01-31 10:08:38,730 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 176.2MB. Free memory was 144.5MB in the beginning and 144.4MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 253.00ms. Allocated memory is still 176.2MB. Free memory was 127.6MB in the beginning and 153.9MB in the end (delta: -26.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 43.04ms. Allocated memory is still 176.2MB. Free memory was 153.9MB in the beginning and 152.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 318.68ms. Allocated memory is still 176.2MB. Free memory was 152.3MB in the beginning and 140.3MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 26.14ms. Allocated memory is still 176.2MB. Free memory was 140.3MB in the beginning and 138.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 380656.03ms. Allocated memory was 176.2MB in the beginning and 405.8MB in the end (delta: 229.6MB). Free memory was 138.2MB in the beginning and 191.6MB in the end (delta: -53.4MB). Peak memory consumption was 177.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...