/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 23:11:36,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 23:11:36,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 23:11:36,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-09 23:11:36,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-09 23:11:36,626 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-09 23:11:36,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-09 23:11:36,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-09 23:11:36,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-09 23:11:36,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-09 23:11:36,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-09 23:11:36,631 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-09 23:11:36,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-09 23:11:36,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-09 23:11:36,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-09 23:11:36,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-09 23:11:36,634 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-09 23:11:36,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-09 23:11:36,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-09 23:11:36,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-09 23:11:36,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-09 23:11:36,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-09 23:11:36,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-09 23:11:36,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-09 23:11:36,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-09 23:11:36,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 23:11:36,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 23:11:36,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 23:11:36,654 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 23:11:36,680 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 23:11:36,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 23:11:36,681 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 23:11:36,681 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 23:11:36,681 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 23:11:36,681 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 23:11:36,682 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 23:11:36,682 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 23:11:36,682 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 23:11:36,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 23:11:36,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 23:11:36,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 23:11:36,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 23:11:36,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 23:11:36,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 23:11:36,682 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 23:11:36,682 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 23:11:36,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 23:11:36,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 23:11:36,683 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 23:11:36,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 23:11:36,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:11:36,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 23:11:36,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 23:11:36,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 23:11:36,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 23:11:36,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 23:11:36,683 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 23:11:36,683 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 23:11:36,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 23:11:36,684 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 23:11:36,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 23:11:36,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 23:11:36,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 23:11:36,904 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 23:11:36,905 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 23:11:36,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const1.c [2022-01-09 23:11:36,952 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e970f67c2/22abbc0c2aed4b7ea5de9c2388b27ac3/FLAGc3c76819d [2022-01-09 23:11:37,302 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 23:11:37,302 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const1.c [2022-01-09 23:11:37,310 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e970f67c2/22abbc0c2aed4b7ea5de9c2388b27ac3/FLAGc3c76819d [2022-01-09 23:11:37,323 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e970f67c2/22abbc0c2aed4b7ea5de9c2388b27ac3 [2022-01-09 23:11:37,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 23:11:37,327 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 23:11:37,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 23:11:37,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 23:11:37,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 23:11:37,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:11:37" (1/1) ... [2022-01-09 23:11:37,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aa6f529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:11:37, skipping insertion in model container [2022-01-09 23:11:37,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:11:37" (1/1) ... [2022-01-09 23:11:37,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 23:11:37,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 23:11:37,453 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_const1.c[406,419] [2022-01-09 23:11:37,477 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:11:37,482 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 23:11:37,491 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_const1.c[406,419] [2022-01-09 23:11:37,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:11:37,528 INFO L208 MainTranslator]: Completed translation [2022-01-09 23:11:37,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:11:37 WrapperNode [2022-01-09 23:11:37,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 23:11:37,530 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 23:11:37,530 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 23:11:37,530 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 23:11:37,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:11:37" (1/1) ... [2022-01-09 23:11:37,555 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:11:37" (1/1) ... [2022-01-09 23:11:37,569 INFO L137 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 60 [2022-01-09 23:11:37,569 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 23:11:37,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 23:11:37,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 23:11:37,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 23:11:37,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:11:37" (1/1) ... [2022-01-09 23:11:37,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:11:37" (1/1) ... [2022-01-09 23:11:37,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:11:37" (1/1) ... [2022-01-09 23:11:37,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:11:37" (1/1) ... [2022-01-09 23:11:37,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:11:37" (1/1) ... [2022-01-09 23:11:37,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:11:37" (1/1) ... [2022-01-09 23:11:37,596 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:11:37" (1/1) ... [2022-01-09 23:11:37,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 23:11:37,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 23:11:37,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 23:11:37,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 23:11:37,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:11:37" (1/1) ... [2022-01-09 23:11:37,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:11:37,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:11:37,633 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) [2022-01-09 23:11:37,641 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 [2022-01-09 23:11:37,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 23:11:37,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 23:11:37,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-09 23:11:37,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-09 23:11:37,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 23:11:37,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 23:11:37,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-09 23:11:37,713 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 23:11:37,714 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 23:11:37,859 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 23:11:37,863 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 23:11:37,863 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-09 23:11:37,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:11:37 BoogieIcfgContainer [2022-01-09 23:11:37,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 23:11:37,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 23:11:37,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 23:11:37,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 23:11:37,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 11:11:37" (1/3) ... [2022-01-09 23:11:37,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a12c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:11:37, skipping insertion in model container [2022-01-09 23:11:37,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:11:37" (2/3) ... [2022-01-09 23:11:37,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a12c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:11:37, skipping insertion in model container [2022-01-09 23:11:37,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:11:37" (3/3) ... [2022-01-09 23:11:37,870 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const1.c [2022-01-09 23:11:37,873 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 23:11:37,873 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 23:11:37,950 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 23:11:37,954 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-01-09 23:11:37,955 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 23:11:37,969 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:37,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-09 23:11:37,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:11:37,973 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:11:37,973 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:11:37,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:11:37,977 INFO L85 PathProgramCache]: Analyzing trace with hash -718163050, now seen corresponding path program 1 times [2022-01-09 23:11:37,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:11:37,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555007532] [2022-01-09 23:11:37,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:11:37,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:11:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:11:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:11:38,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:11:38,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555007532] [2022-01-09 23:11:38,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555007532] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:11:38,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:11:38,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:11:38,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362485869] [2022-01-09 23:11:38,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:11:38,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 23:11:38,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:11:38,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 23:11:38,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 23:11:38,141 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:38,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:11:38,151 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2022-01-09 23:11:38,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 23:11:38,154 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-09 23:11:38,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:11:38,159 INFO L225 Difference]: With dead ends: 35 [2022-01-09 23:11:38,159 INFO L226 Difference]: Without dead ends: 15 [2022-01-09 23:11:38,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 23:11:38,165 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:11:38,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:11:38,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-09 23:11:38,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-09 23:11:38,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:38,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-01-09 23:11:38,190 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2022-01-09 23:11:38,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:11:38,191 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-01-09 23:11:38,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:38,191 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-01-09 23:11:38,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-09 23:11:38,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:11:38,191 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:11:38,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 23:11:38,192 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:11:38,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:11:38,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1709876828, now seen corresponding path program 1 times [2022-01-09 23:11:38,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:11:38,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056270230] [2022-01-09 23:11:38,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:11:38,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:11:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:11:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:11:38,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:11:38,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056270230] [2022-01-09 23:11:38,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056270230] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:11:38,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:11:38,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:11:38,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748815728] [2022-01-09 23:11:38,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:11:38,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:11:38,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:11:38,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:11:38,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:11:38,278 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:38,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:11:38,307 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-01-09 23:11:38,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:11:38,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-09 23:11:38,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:11:38,309 INFO L225 Difference]: With dead ends: 27 [2022-01-09 23:11:38,309 INFO L226 Difference]: Without dead ends: 17 [2022-01-09 23:11:38,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:11:38,313 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:11:38,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:11:38,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-09 23:11:38,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-01-09 23:11:38,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:38,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-01-09 23:11:38,319 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2022-01-09 23:11:38,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:11:38,320 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-01-09 23:11:38,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:38,320 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-01-09 23:11:38,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-09 23:11:38,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:11:38,322 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:11:38,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 23:11:38,322 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:11:38,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:11:38,323 INFO L85 PathProgramCache]: Analyzing trace with hash -2117745282, now seen corresponding path program 1 times [2022-01-09 23:11:38,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:11:38,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949344296] [2022-01-09 23:11:38,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:11:38,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:11:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:11:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 23:11:38,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:11:38,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949344296] [2022-01-09 23:11:38,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949344296] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:11:38,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:11:38,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-09 23:11:38,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960424184] [2022-01-09 23:11:38,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:11:38,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:11:38,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:11:38,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:11:38,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:11:38,395 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:38,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:11:38,434 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-01-09 23:11:38,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:11:38,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-09 23:11:38,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:11:38,435 INFO L225 Difference]: With dead ends: 28 [2022-01-09 23:11:38,436 INFO L226 Difference]: Without dead ends: 21 [2022-01-09 23:11:38,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:11:38,441 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:11:38,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 11 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:11:38,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-09 23:11:38,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-01-09 23:11:38,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:38,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-01-09 23:11:38,448 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2022-01-09 23:11:38,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:11:38,448 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-01-09 23:11:38,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:38,448 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-01-09 23:11:38,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-09 23:11:38,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:11:38,449 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:11:38,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-09 23:11:38,450 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:11:38,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:11:38,450 INFO L85 PathProgramCache]: Analyzing trace with hash -350467326, now seen corresponding path program 1 times [2022-01-09 23:11:38,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:11:38,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082414744] [2022-01-09 23:11:38,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:11:38,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:11:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:11:38,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-09 23:11:38,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:11:38,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082414744] [2022-01-09 23:11:38,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082414744] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:11:38,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911650055] [2022-01-09 23:11:38,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:11:38,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:11:38,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:11:38,534 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) [2022-01-09 23:11:38,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 23:11:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:11:38,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:11:38,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:11:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-09 23:11:38,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:11:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-09 23:11:38,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911650055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:11:38,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:11:38,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-09 23:11:38,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493912445] [2022-01-09 23:11:38,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:11:38,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-09 23:11:38,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:11:38,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-09 23:11:38,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-01-09 23:11:38,728 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:38,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:11:38,762 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-01-09 23:11:38,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-09 23:11:38,762 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-09 23:11:38,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:11:38,762 INFO L225 Difference]: With dead ends: 33 [2022-01-09 23:11:38,762 INFO L226 Difference]: Without dead ends: 21 [2022-01-09 23:11:38,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-01-09 23:11:38,763 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:11:38,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 22 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:11:38,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-09 23:11:38,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-01-09 23:11:38,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:38,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-01-09 23:11:38,766 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2022-01-09 23:11:38,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:11:38,767 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-01-09 23:11:38,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:38,767 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-01-09 23:11:38,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-09 23:11:38,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:11:38,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:11:38,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-09 23:11:38,975 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 [2022-01-09 23:11:38,976 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:11:38,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:11:38,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1584924836, now seen corresponding path program 2 times [2022-01-09 23:11:38,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:11:38,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883369861] [2022-01-09 23:11:38,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:11:38,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:11:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:11:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-09 23:11:39,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:11:39,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883369861] [2022-01-09 23:11:39,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883369861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:11:39,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513710413] [2022-01-09 23:11:39,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:11:39,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:11:39,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:11:39,016 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:11:39,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 23:11:39,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:11:39,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:11:39,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:11:39,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:11:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-09 23:11:39,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:11:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-09 23:11:39,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513710413] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:11:39,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:11:39,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-09 23:11:39,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333364895] [2022-01-09 23:11:39,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:11:39,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-09 23:11:39,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:11:39,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-09 23:11:39,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-01-09 23:11:39,162 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:39,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:11:39,206 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-01-09 23:11:39,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-09 23:11:39,207 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-09 23:11:39,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:11:39,207 INFO L225 Difference]: With dead ends: 35 [2022-01-09 23:11:39,207 INFO L226 Difference]: Without dead ends: 27 [2022-01-09 23:11:39,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:11:39,208 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:11:39,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 17 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:11:39,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-09 23:11:39,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-01-09 23:11:39,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:39,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-01-09 23:11:39,211 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2022-01-09 23:11:39,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:11:39,211 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-01-09 23:11:39,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:39,211 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-01-09 23:11:39,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-09 23:11:39,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:11:39,212 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:11:39,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-09 23:11:39,429 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 [2022-01-09 23:11:39,430 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:11:39,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:11:39,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1965660968, now seen corresponding path program 3 times [2022-01-09 23:11:39,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:11:39,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581590546] [2022-01-09 23:11:39,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:11:39,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:11:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:11:39,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:11:39,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:11:39,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581590546] [2022-01-09 23:11:39,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581590546] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:11:39,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649250745] [2022-01-09 23:11:39,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:11:39,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:11:39,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:11:39,791 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) [2022-01-09 23:11:39,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 23:11:39,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-09 23:11:39,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:11:39,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-09 23:11:39,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:11:39,918 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 [2022-01-09 23:11:40,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:11:40,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-09 23:11:40,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2022-01-09 23:11:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:11:40,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:11:42,235 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 [2022-01-09 23:11:42,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-09 23:11:42,251 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 246 treesize of output 215 [2022-01-09 23:11:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:11:42,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649250745] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:11:42,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:11:42,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 20] total 48 [2022-01-09 23:11:42,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136375152] [2022-01-09 23:11:42,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:11:42,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-09 23:11:42,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:11:42,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-09 23:11:42,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1992, Unknown=0, NotChecked=0, Total=2256 [2022-01-09 23:11:42,575 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:44,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:11:44,131 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2022-01-09 23:11:44,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-09 23:11:44,132 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-09 23:11:44,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:11:44,133 INFO L225 Difference]: With dead ends: 72 [2022-01-09 23:11:44,133 INFO L226 Difference]: Without dead ends: 66 [2022-01-09 23:11:44,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=676, Invalid=5644, Unknown=0, NotChecked=0, Total=6320 [2022-01-09 23:11:44,136 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 43 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:11:44,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 66 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 259 Invalid, 0 Unknown, 286 Unchecked, 0.2s Time] [2022-01-09 23:11:44,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-09 23:11:44,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 39. [2022-01-09 23:11:44,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:44,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-01-09 23:11:44,142 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 23 [2022-01-09 23:11:44,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:11:44,142 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-01-09 23:11:44,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:44,142 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-01-09 23:11:44,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-09 23:11:44,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:11:44,143 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:11:44,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-09 23:11:44,359 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 [2022-01-09 23:11:44,359 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:11:44,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:11:44,359 INFO L85 PathProgramCache]: Analyzing trace with hash -732186678, now seen corresponding path program 4 times [2022-01-09 23:11:44,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:11:44,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394632514] [2022-01-09 23:11:44,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:11:44,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:11:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:11:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:11:44,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:11:44,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394632514] [2022-01-09 23:11:44,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394632514] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:11:44,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748213318] [2022-01-09 23:11:44,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:11:44,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:11:44,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:11:44,412 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) [2022-01-09 23:11:44,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-09 23:11:44,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:11:44,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:11:44,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-09 23:11:44,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:11:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:11:44,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:11:44,569 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:11:44,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748213318] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:11:44,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:11:44,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-09 23:11:44,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451877254] [2022-01-09 23:11:44,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:11:44,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-09 23:11:44,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:11:44,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-09 23:11:44,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:11:44,573 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:44,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:11:44,669 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2022-01-09 23:11:44,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-09 23:11:44,670 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-09 23:11:44,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:11:44,671 INFO L225 Difference]: With dead ends: 81 [2022-01-09 23:11:44,671 INFO L226 Difference]: Without dead ends: 56 [2022-01-09 23:11:44,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-01-09 23:11:44,671 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:11:44,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 41 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:11:44,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-09 23:11:44,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2022-01-09 23:11:44,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:44,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-01-09 23:11:44,677 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 25 [2022-01-09 23:11:44,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:11:44,677 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-01-09 23:11:44,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:44,677 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-01-09 23:11:44,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-09 23:11:44,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:11:44,678 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:11:44,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-09 23:11:44,891 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 [2022-01-09 23:11:44,891 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:11:44,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:11:44,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1031419092, now seen corresponding path program 5 times [2022-01-09 23:11:44,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:11:44,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948173272] [2022-01-09 23:11:44,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:11:44,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:11:44,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:11:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-09 23:11:44,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:11:44,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948173272] [2022-01-09 23:11:44,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948173272] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:11:44,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109723020] [2022-01-09 23:11:44,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:11:44,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:11:44,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:11:44,965 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) [2022-01-09 23:11:44,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-09 23:11:45,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-09 23:11:45,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:11:45,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-09 23:11:45,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:11:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-09 23:11:45,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:11:45,124 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-09 23:11:45,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109723020] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:11:45,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:11:45,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-09 23:11:45,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068793981] [2022-01-09 23:11:45,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:11:45,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-09 23:11:45,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:11:45,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-09 23:11:45,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:11:45,126 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:45,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:11:45,230 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2022-01-09 23:11:45,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-09 23:11:45,231 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-09 23:11:45,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:11:45,232 INFO L225 Difference]: With dead ends: 52 [2022-01-09 23:11:45,233 INFO L226 Difference]: Without dead ends: 42 [2022-01-09 23:11:45,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-01-09 23:11:45,234 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 42 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:11:45,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 27 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:11:45,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-09 23:11:45,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2022-01-09 23:11:45,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:45,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-01-09 23:11:45,243 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2022-01-09 23:11:45,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:11:45,243 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-01-09 23:11:45,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:45,243 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-01-09 23:11:45,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-09 23:11:45,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:11:45,244 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:11:45,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-09 23:11:45,459 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 [2022-01-09 23:11:45,460 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:11:45,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:11:45,460 INFO L85 PathProgramCache]: Analyzing trace with hash 996931278, now seen corresponding path program 6 times [2022-01-09 23:11:45,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:11:45,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770287431] [2022-01-09 23:11:45,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:11:45,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:11:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:11:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:11:46,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:11:46,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770287431] [2022-01-09 23:11:46,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770287431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:11:46,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670311992] [2022-01-09 23:11:46,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 23:11:46,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:11:46,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:11:46,178 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) [2022-01-09 23:11:46,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-09 23:11:46,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-09 23:11:46,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:11:46,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-09 23:11:46,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:11:46,646 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 13 treesize of output 5 [2022-01-09 23:11:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 23:11:46,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:11:47,231 INFO L353 Elim1Store]: treesize reduction 114, result has 46.0 percent of original size [2022-01-09 23:11:47,232 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 [2022-01-09 23:11:47,484 INFO L353 Elim1Store]: treesize reduction 198, result has 6.2 percent of original size [2022-01-09 23:11:47,485 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 [2022-01-09 23:11:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-09 23:11:47,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670311992] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:11:47,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:11:47,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 15] total 46 [2022-01-09 23:11:47,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468131545] [2022-01-09 23:11:47,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:11:47,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-09 23:11:47,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:11:47,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-09 23:11:47,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1920, Unknown=0, NotChecked=0, Total=2070 [2022-01-09 23:11:47,560 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 46 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 46 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:48,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:11:48,728 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-01-09 23:11:48,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-09 23:11:48,728 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 46 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-09 23:11:48,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:11:48,729 INFO L225 Difference]: With dead ends: 46 [2022-01-09 23:11:48,729 INFO L226 Difference]: Without dead ends: 42 [2022-01-09 23:11:48,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=297, Invalid=3863, Unknown=0, NotChecked=0, Total=4160 [2022-01-09 23:11:48,730 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 23:11:48,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 74 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-09 23:11:48,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-09 23:11:48,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2022-01-09 23:11:48,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:48,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-01-09 23:11:48,735 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2022-01-09 23:11:48,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:11:48,735 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-01-09 23:11:48,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 46 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:48,735 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-01-09 23:11:48,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-09 23:11:48,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:11:48,736 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:11:48,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-09 23:11:48,953 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 [2022-01-09 23:11:48,953 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:11:48,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:11:48,954 INFO L85 PathProgramCache]: Analyzing trace with hash 326484464, now seen corresponding path program 7 times [2022-01-09 23:11:48,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:11:48,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337423608] [2022-01-09 23:11:48,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:11:48,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:11:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:11:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-09 23:11:49,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:11:49,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337423608] [2022-01-09 23:11:49,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337423608] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:11:49,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757431330] [2022-01-09 23:11:49,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-09 23:11:49,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:11:49,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:11:49,022 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) [2022-01-09 23:11:49,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-09 23:11:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:11:49,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-09 23:11:49,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:11:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-09 23:11:49,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:11:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-09 23:11:49,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757431330] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:11:49,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:11:49,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-09 23:11:49,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029787700] [2022-01-09 23:11:49,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:11:49,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-09 23:11:49,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:11:49,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-09 23:11:49,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-01-09 23:11:49,204 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:49,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:11:49,326 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2022-01-09 23:11:49,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-09 23:11:49,327 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-09 23:11:49,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:11:49,328 INFO L225 Difference]: With dead ends: 74 [2022-01-09 23:11:49,328 INFO L226 Difference]: Without dead ends: 43 [2022-01-09 23:11:49,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-01-09 23:11:49,328 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 71 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:11:49,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 34 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:11:49,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-09 23:11:49,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2022-01-09 23:11:49,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:49,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-01-09 23:11:49,334 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2022-01-09 23:11:49,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:11:49,335 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-01-09 23:11:49,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:49,335 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-01-09 23:11:49,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-09 23:11:49,335 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:11:49,335 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:11:49,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-09 23:11:49,554 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 [2022-01-09 23:11:49,554 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:11:49,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:11:49,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1551752238, now seen corresponding path program 8 times [2022-01-09 23:11:49,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:11:49,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114016246] [2022-01-09 23:11:49,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:11:49,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:11:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:11:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-09 23:11:49,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:11:49,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114016246] [2022-01-09 23:11:49,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114016246] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:11:49,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283028836] [2022-01-09 23:11:49,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:11:49,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:11:49,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:11:49,629 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) [2022-01-09 23:11:49,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-09 23:11:49,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:11:49,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:11:49,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-09 23:11:49,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:11:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-09 23:11:49,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:11:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-09 23:11:49,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283028836] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:11:49,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:11:49,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-09 23:11:49,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697697112] [2022-01-09 23:11:49,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:11:49,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-09 23:11:49,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:11:49,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-09 23:11:49,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-01-09 23:11:49,829 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:49,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:11:49,948 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-01-09 23:11:49,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-09 23:11:49,949 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-09 23:11:49,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:11:49,949 INFO L225 Difference]: With dead ends: 42 [2022-01-09 23:11:49,949 INFO L226 Difference]: Without dead ends: 38 [2022-01-09 23:11:49,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2022-01-09 23:11:49,950 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 46 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:11:49,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 23 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:11:49,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-09 23:11:49,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-01-09 23:11:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:49,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-01-09 23:11:49,970 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2022-01-09 23:11:49,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:11:49,971 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-01-09 23:11:49,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:49,971 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-01-09 23:11:49,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-09 23:11:49,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:11:49,971 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:11:49,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-09 23:11:50,187 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 [2022-01-09 23:11:50,187 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:11:50,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:11:50,188 INFO L85 PathProgramCache]: Analyzing trace with hash -827015692, now seen corresponding path program 9 times [2022-01-09 23:11:50,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:11:50,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595355663] [2022-01-09 23:11:50,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:11:50,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:11:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:11:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:11:51,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:11:51,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595355663] [2022-01-09 23:11:51,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595355663] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:11:51,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843955096] [2022-01-09 23:11:51,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:11:51,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:11:51,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:11:51,209 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) [2022-01-09 23:11:51,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-09 23:11:51,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-09 23:11:51,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:11:51,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-09 23:11:51,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:11:51,301 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 [2022-01-09 23:11:52,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:11:52,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-09 23:11:52,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:11:52,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:11:52,558 INFO L353 Elim1Store]: treesize reduction 30, result has 73.2 percent of original size [2022-01-09 23:11:52,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 95 [2022-01-09 23:11:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:11:52,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:11:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-09 23:11:55,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843955096] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:11:55,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:11:55,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 21] total 68 [2022-01-09 23:11:55,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933309067] [2022-01-09 23:11:55,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:11:55,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-09 23:11:55,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:11:55,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-09 23:11:55,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=4241, Unknown=0, NotChecked=0, Total=4556 [2022-01-09 23:11:55,444 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 68 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 68 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:57,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:11:57,745 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2022-01-09 23:11:57,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-09 23:11:57,745 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 68 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-09 23:11:57,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:11:57,745 INFO L225 Difference]: With dead ends: 52 [2022-01-09 23:11:57,745 INFO L226 Difference]: Without dead ends: 48 [2022-01-09 23:11:57,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2329 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=739, Invalid=9161, Unknown=0, NotChecked=0, Total=9900 [2022-01-09 23:11:57,748 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:11:57,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 96 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 180 Invalid, 0 Unknown, 264 Unchecked, 0.1s Time] [2022-01-09 23:11:57,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-09 23:11:57,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-01-09 23:11:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:57,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-01-09 23:11:57,757 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 35 [2022-01-09 23:11:57,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:11:57,757 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-01-09 23:11:57,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 68 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:57,757 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-01-09 23:11:57,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-09 23:11:57,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:11:57,758 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:11:57,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-09 23:11:57,959 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 [2022-01-09 23:11:57,959 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:11:57,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:11:57,960 INFO L85 PathProgramCache]: Analyzing trace with hash -139896938, now seen corresponding path program 10 times [2022-01-09 23:11:57,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:11:57,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218493932] [2022-01-09 23:11:57,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:11:57,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:11:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:11:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-09 23:11:58,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:11:58,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218493932] [2022-01-09 23:11:58,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218493932] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:11:58,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003515821] [2022-01-09 23:11:58,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:11:58,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:11:58,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:11:58,042 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) [2022-01-09 23:11:58,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-09 23:11:58,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:11:58,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:11:58,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-09 23:11:58,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:11:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-09 23:11:58,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:11:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-09 23:11:58,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003515821] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:11:58,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:11:58,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-01-09 23:11:58,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478181271] [2022-01-09 23:11:58,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:11:58,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-09 23:11:58,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:11:58,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-09 23:11:58,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-01-09 23:11:58,292 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:58,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:11:58,410 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2022-01-09 23:11:58,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-09 23:11:58,410 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-09 23:11:58,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:11:58,411 INFO L225 Difference]: With dead ends: 86 [2022-01-09 23:11:58,412 INFO L226 Difference]: Without dead ends: 49 [2022-01-09 23:11:58,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-01-09 23:11:58,412 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 71 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:11:58,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 34 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:11:58,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-09 23:11:58,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2022-01-09 23:11:58,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:58,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-01-09 23:11:58,418 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2022-01-09 23:11:58,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:11:58,418 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-01-09 23:11:58,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:58,419 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-01-09 23:11:58,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-09 23:11:58,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:11:58,419 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:11:58,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-09 23:11:58,627 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 [2022-01-09 23:11:58,628 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:11:58,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:11:58,628 INFO L85 PathProgramCache]: Analyzing trace with hash 38479864, now seen corresponding path program 11 times [2022-01-09 23:11:58,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:11:58,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964219094] [2022-01-09 23:11:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:11:58,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:11:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:11:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-09 23:11:58,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:11:58,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964219094] [2022-01-09 23:11:58,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964219094] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:11:58,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643121215] [2022-01-09 23:11:58,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:11:58,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:11:58,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:11:58,706 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) [2022-01-09 23:11:58,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-09 23:11:58,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-09 23:11:58,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:11:58,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-09 23:11:58,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:11:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-09 23:11:58,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:11:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-09 23:11:58,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643121215] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:11:58,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:11:58,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-01-09 23:11:58,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245262244] [2022-01-09 23:11:58,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:11:58,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-09 23:11:58,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:11:58,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-09 23:11:58,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-01-09 23:11:58,935 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:59,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:11:59,099 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-01-09 23:11:59,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-09 23:11:59,100 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-09 23:11:59,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:11:59,100 INFO L225 Difference]: With dead ends: 48 [2022-01-09 23:11:59,100 INFO L226 Difference]: Without dead ends: 44 [2022-01-09 23:11:59,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-01-09 23:11:59,101 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 77 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:11:59,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 20 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:11:59,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-09 23:11:59,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-01-09 23:11:59,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:59,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-01-09 23:11:59,107 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2022-01-09 23:11:59,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:11:59,107 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-01-09 23:11:59,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:11:59,108 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-01-09 23:11:59,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-09 23:11:59,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:11:59,108 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:11:59,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-09 23:11:59,313 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 [2022-01-09 23:11:59,313 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:11:59,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:11:59,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1622323046, now seen corresponding path program 12 times [2022-01-09 23:11:59,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:11:59,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967275291] [2022-01-09 23:11:59,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:11:59,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:11:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:12:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:12:00,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:12:00,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967275291] [2022-01-09 23:12:00,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967275291] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:12:00,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734233587] [2022-01-09 23:12:00,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 23:12:00,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:12:00,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:12:00,680 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) [2022-01-09 23:12:00,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-09 23:12:00,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-09 23:12:00,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:12:00,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-09 23:12:00,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:12:00,864 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 [2022-01-09 23:12:02,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-09 23:12:02,037 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 [2022-01-09 23:12:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 23:12:02,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:12:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-09 23:12:05,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734233587] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:12:05,954 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:12:05,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30, 25] total 80 [2022-01-09 23:12:05,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316125968] [2022-01-09 23:12:05,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:12:05,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-09 23:12:05,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:12:05,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-09 23:12:05,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=5970, Unknown=0, NotChecked=0, Total=6320 [2022-01-09 23:12:05,956 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 80 states, 80 states have (on average 1.325) internal successors, (106), 80 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:12:08,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:12:08,693 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2022-01-09 23:12:08,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-09 23:12:08,694 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.325) internal successors, (106), 80 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-09 23:12:08,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:12:08,694 INFO L225 Difference]: With dead ends: 61 [2022-01-09 23:12:08,694 INFO L226 Difference]: Without dead ends: 57 [2022-01-09 23:12:08,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2637 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=757, Invalid=12125, Unknown=0, NotChecked=0, Total=12882 [2022-01-09 23:12:08,697 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 650 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 23:12:08,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 115 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 761 Invalid, 0 Unknown, 650 Unchecked, 0.4s Time] [2022-01-09 23:12:08,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-09 23:12:08,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2022-01-09 23:12:08,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:12:08,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-01-09 23:12:08,705 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 41 [2022-01-09 23:12:08,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:12:08,705 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-01-09 23:12:08,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.325) internal successors, (106), 80 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:12:08,705 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-01-09 23:12:08,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-09 23:12:08,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:12:08,706 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:12:08,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-09 23:12:08,906 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 [2022-01-09 23:12:08,906 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:12:08,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:12:08,907 INFO L85 PathProgramCache]: Analyzing trace with hash 73914556, now seen corresponding path program 13 times [2022-01-09 23:12:08,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:12:08,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26849885] [2022-01-09 23:12:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:12:08,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:12:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:12:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-09 23:12:08,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:12:08,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26849885] [2022-01-09 23:12:08,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26849885] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:12:08,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650306938] [2022-01-09 23:12:08,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-09 23:12:08,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:12:08,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:12:08,995 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) [2022-01-09 23:12:08,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-09 23:12:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:12:09,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-09 23:12:09,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:12:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-09 23:12:09,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:12:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-09 23:12:09,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650306938] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:12:09,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:12:09,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-01-09 23:12:09,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422401281] [2022-01-09 23:12:09,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:12:09,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-09 23:12:09,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:12:09,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-09 23:12:09,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-01-09 23:12:09,276 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:12:09,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:12:09,442 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2022-01-09 23:12:09,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-09 23:12:09,442 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-09 23:12:09,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:12:09,443 INFO L225 Difference]: With dead ends: 98 [2022-01-09 23:12:09,443 INFO L226 Difference]: Without dead ends: 55 [2022-01-09 23:12:09,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-01-09 23:12:09,444 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 98 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:12:09,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 31 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:12:09,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-09 23:12:09,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2022-01-09 23:12:09,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:12:09,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2022-01-09 23:12:09,451 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2022-01-09 23:12:09,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:12:09,452 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2022-01-09 23:12:09,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:12:09,452 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2022-01-09 23:12:09,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-09 23:12:09,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:12:09,453 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:12:09,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-09 23:12:09,670 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 [2022-01-09 23:12:09,670 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:12:09,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:12:09,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1970943902, now seen corresponding path program 14 times [2022-01-09 23:12:09,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:12:09,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519456256] [2022-01-09 23:12:09,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:12:09,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:12:09,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:12:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-09 23:12:09,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:12:09,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519456256] [2022-01-09 23:12:09,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519456256] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:12:09,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759038571] [2022-01-09 23:12:09,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:12:09,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:12:09,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:12:09,769 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) [2022-01-09 23:12:09,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-09 23:12:09,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:12:09,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:12:09,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-09 23:12:09,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:12:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-09 23:12:09,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:12:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-09 23:12:10,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759038571] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:12:10,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:12:10,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-01-09 23:12:10,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341944446] [2022-01-09 23:12:10,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:12:10,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-09 23:12:10,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:12:10,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-09 23:12:10,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-01-09 23:12:10,043 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:12:10,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:12:10,235 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2022-01-09 23:12:10,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-09 23:12:10,235 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-01-09 23:12:10,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:12:10,236 INFO L225 Difference]: With dead ends: 54 [2022-01-09 23:12:10,236 INFO L226 Difference]: Without dead ends: 50 [2022-01-09 23:12:10,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2022-01-09 23:12:10,237 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 71 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:12:10,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 31 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:12:10,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-09 23:12:10,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-01-09 23:12:10,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:12:10,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-01-09 23:12:10,244 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2022-01-09 23:12:10,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:12:10,244 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-01-09 23:12:10,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:12:10,245 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-01-09 23:12:10,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-09 23:12:10,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:12:10,245 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:12:10,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-09 23:12:10,455 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 [2022-01-09 23:12:10,456 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:12:10,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:12:10,456 INFO L85 PathProgramCache]: Analyzing trace with hash 49745600, now seen corresponding path program 15 times [2022-01-09 23:12:10,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:12:10,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069194346] [2022-01-09 23:12:10,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:12:10,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:12:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:12:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:12:12,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:12:12,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069194346] [2022-01-09 23:12:12,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069194346] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:12:12,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765831694] [2022-01-09 23:12:12,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:12:12,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:12:12,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:12:12,238 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) [2022-01-09 23:12:12,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-09 23:12:12,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-09 23:12:12,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:12:12,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 74 conjunts are in the unsatisfiable core [2022-01-09 23:12:12,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:12:12,383 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 [2022-01-09 23:12:14,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:14,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:14,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:14,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-09 23:12:14,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:14,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:14,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:14,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:14,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:14,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:14,796 INFO L353 Elim1Store]: treesize reduction 22, result has 78.8 percent of original size [2022-01-09 23:12:14,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 66 treesize of output 97 [2022-01-09 23:12:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 7 proven. 92 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-09 23:12:15,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:12:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-09 23:12:19,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765831694] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:12:19,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:12:19,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 35, 29] total 96 [2022-01-09 23:12:19,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108370490] [2022-01-09 23:12:19,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:12:19,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-09 23:12:19,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:12:19,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-09 23:12:19,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=8601, Unknown=0, NotChecked=0, Total=9120 [2022-01-09 23:12:19,986 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 96 states, 96 states have (on average 1.2291666666666667) internal successors, (118), 96 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:12:24,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:12:24,675 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2022-01-09 23:12:24,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-09 23:12:24,675 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.2291666666666667) internal successors, (118), 96 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-09 23:12:24,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:12:24,676 INFO L225 Difference]: With dead ends: 68 [2022-01-09 23:12:24,676 INFO L226 Difference]: Without dead ends: 64 [2022-01-09 23:12:24,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4215 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=1142, Invalid=18318, Unknown=0, NotChecked=0, Total=19460 [2022-01-09 23:12:24,678 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:12:24,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 131 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 285 Invalid, 0 Unknown, 380 Unchecked, 0.1s Time] [2022-01-09 23:12:24,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-09 23:12:24,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2022-01-09 23:12:24,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:12:24,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2022-01-09 23:12:24,689 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 47 [2022-01-09 23:12:24,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:12:24,689 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2022-01-09 23:12:24,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.2291666666666667) internal successors, (118), 96 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:12:24,690 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2022-01-09 23:12:24,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-09 23:12:24,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:12:24,690 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:12:24,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-09 23:12:24,906 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 [2022-01-09 23:12:24,906 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:12:24,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:12:24,906 INFO L85 PathProgramCache]: Analyzing trace with hash 614114658, now seen corresponding path program 16 times [2022-01-09 23:12:24,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:12:24,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407219708] [2022-01-09 23:12:24,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:12:24,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:12:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:12:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-09 23:12:25,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:12:25,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407219708] [2022-01-09 23:12:25,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407219708] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:12:25,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70014292] [2022-01-09 23:12:25,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:12:25,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:12:25,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:12:25,005 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) [2022-01-09 23:12:25,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-09 23:12:25,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:12:25,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:12:25,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-09 23:12:25,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:12:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-09 23:12:25,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:12:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-09 23:12:25,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70014292] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:12:25,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:12:25,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-01-09 23:12:25,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13985765] [2022-01-09 23:12:25,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:12:25,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-09 23:12:25,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:12:25,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-09 23:12:25,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-01-09 23:12:25,304 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:12:25,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:12:25,508 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2022-01-09 23:12:25,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-09 23:12:25,508 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-01-09 23:12:25,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:12:25,509 INFO L225 Difference]: With dead ends: 110 [2022-01-09 23:12:25,509 INFO L226 Difference]: Without dead ends: 61 [2022-01-09 23:12:25,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-01-09 23:12:25,510 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 104 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:12:25,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 34 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:12:25,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-09 23:12:25,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2022-01-09 23:12:25,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:12:25,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-01-09 23:12:25,520 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2022-01-09 23:12:25,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:12:25,520 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-01-09 23:12:25,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:12:25,520 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-01-09 23:12:25,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-09 23:12:25,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:12:25,521 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:12:25,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-09 23:12:25,735 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 [2022-01-09 23:12:25,736 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:12:25,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:12:25,736 INFO L85 PathProgramCache]: Analyzing trace with hash 2099294916, now seen corresponding path program 17 times [2022-01-09 23:12:25,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:12:25,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712507159] [2022-01-09 23:12:25,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:12:25,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:12:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:12:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-09 23:12:25,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:12:25,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712507159] [2022-01-09 23:12:25,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712507159] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:12:25,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182480620] [2022-01-09 23:12:25,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:12:25,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:12:25,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:12:25,852 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) [2022-01-09 23:12:25,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-09 23:12:25,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-09 23:12:25,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:12:25,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-09 23:12:25,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:12:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-09 23:12:26,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:12:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-09 23:12:26,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182480620] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:12:26,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:12:26,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-01-09 23:12:26,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752089339] [2022-01-09 23:12:26,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:12:26,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-09 23:12:26,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:12:26,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-09 23:12:26,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-01-09 23:12:26,194 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:12:26,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:12:26,448 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-01-09 23:12:26,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-09 23:12:26,449 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-09 23:12:26,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:12:26,449 INFO L225 Difference]: With dead ends: 60 [2022-01-09 23:12:26,449 INFO L226 Difference]: Without dead ends: 56 [2022-01-09 23:12:26,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2022-01-09 23:12:26,450 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 74 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:12:26,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 33 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:12:26,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-09 23:12:26,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-01-09 23:12:26,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:12:26,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-01-09 23:12:26,460 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2022-01-09 23:12:26,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:12:26,460 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-01-09 23:12:26,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:12:26,460 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-01-09 23:12:26,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-09 23:12:26,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:12:26,461 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:12:26,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-09 23:12:26,664 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 [2022-01-09 23:12:26,664 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:12:26,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:12:26,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1158981530, now seen corresponding path program 18 times [2022-01-09 23:12:26,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:12:26,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536672210] [2022-01-09 23:12:26,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:12:26,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:12:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:12:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:12:28,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:12:28,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536672210] [2022-01-09 23:12:28,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536672210] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:12:28,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707977436] [2022-01-09 23:12:28,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 23:12:28,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:12:28,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:12:28,659 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) [2022-01-09 23:12:28,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-09 23:12:28,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-09 23:12:28,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:12:28,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 82 conjunts are in the unsatisfiable core [2022-01-09 23:12:28,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:12:28,829 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 [2022-01-09 23:12:33,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:12:33,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-09 23:12:33,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 96 treesize of output 249 [2022-01-09 23:12:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 11 proven. 111 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-09 23:12:33,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:12:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-09 23:12:39,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707977436] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:12:39,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:12:39,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 36, 33] total 106 [2022-01-09 23:12:39,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123476717] [2022-01-09 23:12:39,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:12:39,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-09 23:12:39,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:12:39,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-09 23:12:39,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=661, Invalid=10468, Unknown=1, NotChecked=0, Total=11130 [2022-01-09 23:12:39,662 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 106 states, 106 states have (on average 1.2358490566037736) internal successors, (131), 106 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:12:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:12:45,623 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-01-09 23:12:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-09 23:12:45,624 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.2358490566037736) internal successors, (131), 106 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-09 23:12:45,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:12:45,624 INFO L225 Difference]: With dead ends: 77 [2022-01-09 23:12:45,624 INFO L226 Difference]: Without dead ends: 73 [2022-01-09 23:12:45,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5604 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=1560, Invalid=22619, Unknown=1, NotChecked=0, Total=24180 [2022-01-09 23:12:45,626 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 40 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 901 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:12:45,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 140 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 927 Invalid, 0 Unknown, 901 Unchecked, 0.5s Time] [2022-01-09 23:12:45,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-09 23:12:45,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 59. [2022-01-09 23:12:45,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:12:45,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-01-09 23:12:45,640 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 53 [2022-01-09 23:12:45,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:12:45,640 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-01-09 23:12:45,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.2358490566037736) internal successors, (131), 106 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:12:45,640 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-01-09 23:12:45,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-09 23:12:45,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:12:45,641 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:12:45,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-09 23:12:45,841 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 [2022-01-09 23:12:45,841 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:12:45,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:12:45,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1331487352, now seen corresponding path program 19 times [2022-01-09 23:12:45,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:12:45,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26277309] [2022-01-09 23:12:45,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:12:45,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:12:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:12:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-09 23:12:45,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:12:45,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26277309] [2022-01-09 23:12:45,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26277309] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:12:45,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225056644] [2022-01-09 23:12:45,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-09 23:12:45,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:12:45,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:12:45,959 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) [2022-01-09 23:12:45,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-09 23:12:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:12:46,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-09 23:12:46,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:12:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-09 23:12:46,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:12:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-09 23:12:46,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225056644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:12:46,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:12:46,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-01-09 23:12:46,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125111544] [2022-01-09 23:12:46,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:12:46,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-09 23:12:46,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:12:46,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-09 23:12:46,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2022-01-09 23:12:46,285 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:12:46,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:12:46,477 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2022-01-09 23:12:46,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-09 23:12:46,478 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-01-09 23:12:46,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:12:46,479 INFO L225 Difference]: With dead ends: 122 [2022-01-09 23:12:46,479 INFO L226 Difference]: Without dead ends: 67 [2022-01-09 23:12:46,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-01-09 23:12:46,480 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 142 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:12:46,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 34 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:12:46,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states.