/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_Bitvector.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:53:33,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:53:33,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:53:34,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 03:53:34,043 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 03:53:34,067 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:53:34,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:53:34,068 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:53:34,068 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:53:34,068 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:53:34,068 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:53:34,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:53:34,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:53:34,069 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:53:34,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:53:34,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:53:34,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:53:34,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:53:34,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:53:34,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:53:34,070 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:53:34,070 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:53:34,070 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:53:34,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:53:34,070 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:53:34,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:53:34,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:53:34,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:53:34,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:53:34,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:53:34,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:53:34,071 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:53:34,071 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:53:34,071 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:53:34,071 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:53:34,072 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:53:34,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:53:34,072 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:53:34,072 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:53:34,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:53:34,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:53:34,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:53:34,234 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:53:34,236 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:53:34,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const1.c [2022-01-10 03:53:34,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15c4d7ac6/f12b2cc6473f4940b3f652ef472c47e9/FLAG0e04382db [2022-01-10 03:53:34,683 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:53:34,684 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const1.c [2022-01-10 03:53:34,687 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15c4d7ac6/f12b2cc6473f4940b3f652ef472c47e9/FLAG0e04382db [2022-01-10 03:53:34,695 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15c4d7ac6/f12b2cc6473f4940b3f652ef472c47e9 [2022-01-10 03:53:34,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:53:34,699 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:53:34,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:53:34,700 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:53:34,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:53:34,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:53:34" (1/1) ... [2022-01-10 03:53:34,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b91c010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:34, skipping insertion in model container [2022-01-10 03:53:34,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:53:34" (1/1) ... [2022-01-10 03:53:34,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:53:34,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:53:34,826 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] [2022-01-10 03:53:34,855 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:53:34,867 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:53:34,877 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] [2022-01-10 03:53:34,882 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:53:34,891 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:53:34,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:34 WrapperNode [2022-01-10 03:53:34,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:53:34,893 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:53:34,893 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:53:34,893 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:53:34,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:34" (1/1) ... [2022-01-10 03:53:34,906 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:34" (1/1) ... [2022-01-10 03:53:34,917 INFO L137 Inliner]: procedures = 18, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-01-10 03:53:34,918 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:53:34,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:53:34,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:53:34,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:53:34,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:34" (1/1) ... [2022-01-10 03:53:34,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:34" (1/1) ... [2022-01-10 03:53:34,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:34" (1/1) ... [2022-01-10 03:53:34,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:34" (1/1) ... [2022-01-10 03:53:34,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:34" (1/1) ... [2022-01-10 03:53:34,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:34" (1/1) ... [2022-01-10 03:53:34,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:34" (1/1) ... [2022-01-10 03:53:34,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:53:34,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:53:34,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:53:34,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:53:34,945 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:34" (1/1) ... [2022-01-10 03:53:34,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:53:34,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:53:34,969 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) [2022-01-10 03:53:34,975 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 [2022-01-10 03:53:35,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:53:35,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:53:35,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-01-10 03:53:35,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 03:53:35,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:53:35,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:53:35,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-01-10 03:53:35,043 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:53:35,044 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:53:35,158 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:53:35,162 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:53:35,163 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 03:53:35,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:53:35 BoogieIcfgContainer [2022-01-10 03:53:35,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:53:35,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:53:35,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:53:35,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:53:35,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:53:34" (1/3) ... [2022-01-10 03:53:35,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10230f50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:53:35, skipping insertion in model container [2022-01-10 03:53:35,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:34" (2/3) ... [2022-01-10 03:53:35,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10230f50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:53:35, skipping insertion in model container [2022-01-10 03:53:35,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:53:35" (3/3) ... [2022-01-10 03:53:35,181 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const1.c [2022-01-10 03:53:35,184 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:53:35,184 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:53:35,215 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:53:35,223 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 [2022-01-10 03:53:35,224 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:53:35,232 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) [2022-01-10 03:53:35,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 03:53:35,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:35,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:35,236 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:35,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:35,247 INFO L85 PathProgramCache]: Analyzing trace with hash -718163050, now seen corresponding path program 1 times [2022-01-10 03:53:35,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:35,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817012708] [2022-01-10 03:53:35,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:53:35,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:35,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:35,268 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:35,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 03:53:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:53:35,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:53:35,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:53:35,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:53:35,384 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:35,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817012708] [2022-01-10 03:53:35,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817012708] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:53:35,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:53:35,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:53:35,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973434905] [2022-01-10 03:53:35,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:53:35,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:53:35,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:35,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:53:35,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:53:35,407 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) [2022-01-10 03:53:35,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:53:35,415 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2022-01-10 03:53:35,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:53:35,417 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 [2022-01-10 03:53:35,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:53:35,421 INFO L225 Difference]: With dead ends: 35 [2022-01-10 03:53:35,421 INFO L226 Difference]: Without dead ends: 15 [2022-01-10 03:53:35,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:53:35,425 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 [2022-01-10 03:53:35,425 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] [2022-01-10 03:53:35,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-10 03:53:35,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-10 03:53:35,441 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) [2022-01-10 03:53:35,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-01-10 03:53:35,442 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2022-01-10 03:53:35,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:53:35,443 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-01-10 03:53:35,443 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) [2022-01-10 03:53:35,443 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-01-10 03:53:35,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 03:53:35,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:35,443 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:35,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 03:53:35,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:53:35,650 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:35,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:35,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1709876828, now seen corresponding path program 1 times [2022-01-10 03:53:35,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:35,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390576904] [2022-01-10 03:53:35,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:53:35,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:35,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:35,654 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:35,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 03:53:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:53:35,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 03:53:35,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:53:35,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:53:35,761 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:35,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390576904] [2022-01-10 03:53:35,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390576904] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:53:35,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:53:35,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 03:53:35,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057061097] [2022-01-10 03:53:35,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:53:35,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 03:53:35,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:35,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 03:53:35,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:53:35,763 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-01-10 03:53:35,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:53:35,796 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2022-01-10 03:53:35,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 03:53:35,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2022-01-10 03:53:35,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:53:35,797 INFO L225 Difference]: With dead ends: 22 [2022-01-10 03:53:35,797 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 03:53:35,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:53:35,798 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:53:35,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:53:35,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 03:53:35,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-10 03:53:35,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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) [2022-01-10 03:53:35,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-01-10 03:53:35,802 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2022-01-10 03:53:35,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:53:35,802 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-01-10 03:53:35,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-01-10 03:53:35,802 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-01-10 03:53:35,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-10 03:53:35,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:35,803 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:35,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-01-10 03:53:36,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:53:36,012 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:36,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:36,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1727609346, now seen corresponding path program 1 times [2022-01-10 03:53:36,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:36,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176373868] [2022-01-10 03:53:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:53:36,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:36,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:36,014 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:36,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 03:53:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:53:36,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 03:53:36,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:53:36,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:53:36,114 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:36,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176373868] [2022-01-10 03:53:36,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176373868] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:53:36,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:53:36,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:53:36,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549680636] [2022-01-10 03:53:36,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:53:36,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 03:53:36,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:36,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 03:53:36,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:53:36,116 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2022-01-10 03:53:36,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:53:36,179 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-01-10 03:53:36,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 03:53:36,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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 [2022-01-10 03:53:36,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:53:36,181 INFO L225 Difference]: With dead ends: 33 [2022-01-10 03:53:36,181 INFO L226 Difference]: Without dead ends: 20 [2022-01-10 03:53:36,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:53:36,183 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:53:36,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 17 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:53:36,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-10 03:53:36,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-01-10 03:53:36,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 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) [2022-01-10 03:53:36,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-01-10 03:53:36,186 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2022-01-10 03:53:36,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:53:36,186 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-01-10 03:53:36,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2022-01-10 03:53:36,186 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-01-10 03:53:36,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 03:53:36,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:36,187 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:36,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-01-10 03:53:36,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:53:36,392 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:36,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:36,393 INFO L85 PathProgramCache]: Analyzing trace with hash 714515616, now seen corresponding path program 1 times [2022-01-10 03:53:36,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:36,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277927425] [2022-01-10 03:53:36,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:53:36,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:36,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:36,395 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:36,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 03:53:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:53:36,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:53:36,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:53:36,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:53:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:53:36,577 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:36,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277927425] [2022-01-10 03:53:36,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277927425] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:53:36,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:53:36,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-01-10 03:53:36,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488906536] [2022-01-10 03:53:36,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:53:36,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 03:53:36,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:36,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 03:53:36,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:53:36,579 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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) [2022-01-10 03:53:36,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:53:36,701 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-01-10 03:53:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:53:36,701 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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 15 [2022-01-10 03:53:36,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:53:36,702 INFO L225 Difference]: With dead ends: 35 [2022-01-10 03:53:36,702 INFO L226 Difference]: Without dead ends: 22 [2022-01-10 03:53:36,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-01-10 03:53:36,703 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:53:36,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 24 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:53:36,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-10 03:53:36,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-01-10 03:53:36,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 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) [2022-01-10 03:53:36,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-01-10 03:53:36,706 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2022-01-10 03:53:36,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:53:36,707 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-01-10 03:53:36,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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) [2022-01-10 03:53:36,707 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-01-10 03:53:36,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 03:53:36,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:36,707 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:36,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 03:53:36,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:53:36,935 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:36,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:36,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1750506814, now seen corresponding path program 2 times [2022-01-10 03:53:36,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:36,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127763493] [2022-01-10 03:53:36,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:53:36,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:36,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:36,939 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:36,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 03:53:36,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 03:53:36,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:53:36,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 03:53:36,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:53:37,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:53:37,078 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:37,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127763493] [2022-01-10 03:53:37,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127763493] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:53:37,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:53:37,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 03:53:37,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726700239] [2022-01-10 03:53:37,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:53:37,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:53:37,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:37,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:53:37,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:53:37,086 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-01-10 03:53:37,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:53:37,171 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-01-10 03:53:37,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 03:53:37,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 [2022-01-10 03:53:37,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:53:37,173 INFO L225 Difference]: With dead ends: 30 [2022-01-10 03:53:37,173 INFO L226 Difference]: Without dead ends: 22 [2022-01-10 03:53:37,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:53:37,174 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:53:37,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 10 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:53:37,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-10 03:53:37,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2022-01-10 03:53:37,176 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) [2022-01-10 03:53:37,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-01-10 03:53:37,177 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2022-01-10 03:53:37,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:53:37,177 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-01-10 03:53:37,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-01-10 03:53:37,177 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-01-10 03:53:37,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 03:53:37,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:37,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:37,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 03:53:37,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:53:37,385 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:37,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:37,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1584924836, now seen corresponding path program 1 times [2022-01-10 03:53:37,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:37,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568619644] [2022-01-10 03:53:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:53:37,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:37,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:37,388 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:37,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 03:53:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:53:37,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 03:53:37,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:53:37,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:53:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:53:37,811 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:37,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [568619644] [2022-01-10 03:53:37,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [568619644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:53:37,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:53:37,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 03:53:37,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944859658] [2022-01-10 03:53:37,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:53:37,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 03:53:37,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:37,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 03:53:37,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-01-10 03:53:37,813 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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) [2022-01-10 03:53:38,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:53:38,164 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2022-01-10 03:53:38,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 03:53:38,165 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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 [2022-01-10 03:53:38,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:53:38,165 INFO L225 Difference]: With dead ends: 53 [2022-01-10 03:53:38,165 INFO L226 Difference]: Without dead ends: 43 [2022-01-10 03:53:38,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2022-01-10 03:53:38,167 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 112 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:53:38,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 24 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 03:53:38,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-10 03:53:38,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-01-10 03:53:38,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 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) [2022-01-10 03:53:38,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-01-10 03:53:38,171 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 19 [2022-01-10 03:53:38,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:53:38,172 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-01-10 03:53:38,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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) [2022-01-10 03:53:38,172 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-01-10 03:53:38,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 03:53:38,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:38,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:38,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 03:53:38,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:53:38,379 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:38,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:38,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1965660968, now seen corresponding path program 2 times [2022-01-10 03:53:38,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:38,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1535567639] [2022-01-10 03:53:38,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:53:38,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:38,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:38,381 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:38,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 03:53:38,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:53:38,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:53:38,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 03:53:38,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:38,689 INFO L353 Elim1Store]: treesize reduction 45, result has 21.1 percent of original size [2022-01-10 03:53:38,689 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 1 case distinctions, treesize of input 26 treesize of output 27 [2022-01-10 03:53:39,239 INFO L353 Elim1Store]: treesize reduction 114, result has 0.9 percent of original size [2022-01-10 03:53:39,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 28 [2022-01-10 03:53:39,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:53:39,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:53:40,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:53:40,992 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:40,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1535567639] [2022-01-10 03:53:40,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1535567639] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:53:40,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:53:40,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2022-01-10 03:53:40,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975327403] [2022-01-10 03:53:40,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:53:40,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 03:53:40,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:40,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 03:53:40,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-01-10 03:53:40,994 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 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) [2022-01-10 03:53:43,520 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 03:53:45,766 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 03:53:47,930 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 03:53:49,948 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 03:53:50,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:53:50,321 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-01-10 03:53:50,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 03:53:50,339 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 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 23 [2022-01-10 03:53:50,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:53:50,340 INFO L225 Difference]: With dead ends: 50 [2022-01-10 03:53:50,340 INFO L226 Difference]: Without dead ends: 34 [2022-01-10 03:53:50,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-01-10 03:53:50,341 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:53:50,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 86 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 314 Invalid, 4 Unknown, 13 Unchecked, 9.2s Time] [2022-01-10 03:53:50,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-10 03:53:50,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2022-01-10 03:53:50,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 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) [2022-01-10 03:53:50,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-01-10 03:53:50,346 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2022-01-10 03:53:50,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:53:50,346 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-01-10 03:53:50,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 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) [2022-01-10 03:53:50,346 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-01-10 03:53:50,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 03:53:50,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:50,346 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:50,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 03:53:50,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:53:50,554 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:50,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:50,554 INFO L85 PathProgramCache]: Analyzing trace with hash 368620396, now seen corresponding path program 3 times [2022-01-10 03:53:50,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:50,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758155344] [2022-01-10 03:53:50,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:53:50,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:50,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:50,556 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:50,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 03:53:50,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 03:53:50,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:53:50,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 03:53:50,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 03:53:50,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:53:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 03:53:51,081 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:51,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758155344] [2022-01-10 03:53:51,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758155344] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:53:51,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:53:51,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2022-01-10 03:53:51,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986834575] [2022-01-10 03:53:51,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:53:51,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 03:53:51,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:51,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 03:53:51,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-10 03:53:51,083 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2022-01-10 03:53:51,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:53:51,480 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-01-10 03:53:51,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 03:53:51,481 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 27 [2022-01-10 03:53:51,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:53:51,481 INFO L225 Difference]: With dead ends: 49 [2022-01-10 03:53:51,481 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 03:53:51,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=577, Unknown=0, NotChecked=0, Total=756 [2022-01-10 03:53:51,482 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 83 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:53:51,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 39 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 03:53:51,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 03:53:51,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2022-01-10 03:53:51,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 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) [2022-01-10 03:53:51,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-01-10 03:53:51,486 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 27 [2022-01-10 03:53:51,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:53:51,486 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-01-10 03:53:51,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2022-01-10 03:53:51,486 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-01-10 03:53:51,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 03:53:51,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:51,487 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:51,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-01-10 03:53:51,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:53:51,687 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:51,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:51,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1031419092, now seen corresponding path program 4 times [2022-01-10 03:53:51,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:51,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136060036] [2022-01-10 03:53:51,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 03:53:51,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:51,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:51,689 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:51,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 03:53:51,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 03:53:51,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:53:51,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 03:53:51,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 03:53:52,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:53:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 03:53:52,418 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:52,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136060036] [2022-01-10 03:53:52,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136060036] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:53:52,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:53:52,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-01-10 03:53:52,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979278857] [2022-01-10 03:53:52,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:53:52,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 03:53:52,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:52,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 03:53:52,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2022-01-10 03:53:52,419 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 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) [2022-01-10 03:53:52,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:53:52,968 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2022-01-10 03:53:52,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 03:53:52,969 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 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 [2022-01-10 03:53:52,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:53:52,970 INFO L225 Difference]: With dead ends: 65 [2022-01-10 03:53:52,970 INFO L226 Difference]: Without dead ends: 53 [2022-01-10 03:53:52,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 03:53:52,971 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 151 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:53:52,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 27 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 03:53:52,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-10 03:53:52,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2022-01-10 03:53:52,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 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) [2022-01-10 03:53:52,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-01-10 03:53:52,976 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 27 [2022-01-10 03:53:52,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:53:52,976 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-01-10 03:53:52,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 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) [2022-01-10 03:53:52,977 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-01-10 03:53:52,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 03:53:52,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:52,977 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:52,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 03:53:53,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:53:53,185 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:53,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:53,185 INFO L85 PathProgramCache]: Analyzing trace with hash 996931278, now seen corresponding path program 5 times [2022-01-10 03:53:53,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:53,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502483070] [2022-01-10 03:53:53,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 03:53:53,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:53,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:53,186 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:53,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 03:53:53,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-10 03:53:53,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:53:53,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-10 03:53:53,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:53,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2022-01-10 03:53:53,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 03:53:53,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 61 [2022-01-10 03:53:53,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:53,625 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 03:53:53,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 16 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 94 [2022-01-10 03:53:54,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:54,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:54,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:54,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:54,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:54,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:54,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:54,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:54,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:54,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:54,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:54,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:54,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:54,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:54,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:54,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 03:53:54,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 115 treesize of output 35 [2022-01-10 03:53:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:53:55,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:53:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 03:53:59,719 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:59,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502483070] [2022-01-10 03:53:59,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502483070] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:53:59,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:53:59,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2022-01-10 03:53:59,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256999435] [2022-01-10 03:53:59,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:53:59,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-10 03:53:59,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:59,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-10 03:53:59,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2022-01-10 03:53:59,721 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 31 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) [2022-01-10 03:54:01,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:54:01,263 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2022-01-10 03:54:01,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 03:54:01,264 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 31 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) Word has length 29 [2022-01-10 03:54:01,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:54:01,264 INFO L225 Difference]: With dead ends: 62 [2022-01-10 03:54:01,264 INFO L226 Difference]: Without dead ends: 42 [2022-01-10 03:54:01,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2022-01-10 03:54:01,265 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 03:54:01,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 71 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 03:54:01,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-10 03:54:01,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2022-01-10 03:54:01,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 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) [2022-01-10 03:54:01,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-01-10 03:54:01,270 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 29 [2022-01-10 03:54:01,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:54:01,271 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-01-10 03:54:01,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 31 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) [2022-01-10 03:54:01,271 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-01-10 03:54:01,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-10 03:54:01,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:54:01,275 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:54:01,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-01-10 03:54:01,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:54:01,485 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:54:01,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:54:01,485 INFO L85 PathProgramCache]: Analyzing trace with hash -438567918, now seen corresponding path program 6 times [2022-01-10 03:54:01,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:54:01,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135130346] [2022-01-10 03:54:01,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 03:54:01,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:54:01,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:54:01,486 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:54:01,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 03:54:01,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-10 03:54:01,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:54:01,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 03:54:01,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:54:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 03:54:01,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:54:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 03:54:02,248 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:54:02,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135130346] [2022-01-10 03:54:02,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135130346] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:54:02,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:54:02,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2022-01-10 03:54:02,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572456155] [2022-01-10 03:54:02,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:54:02,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 03:54:02,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:54:02,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 03:54:02,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-01-10 03:54:02,249 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2022-01-10 03:54:02,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:54:02,862 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-01-10 03:54:02,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 03:54:02,863 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 33 [2022-01-10 03:54:02,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:54:02,863 INFO L225 Difference]: With dead ends: 53 [2022-01-10 03:54:02,863 INFO L226 Difference]: Without dead ends: 39 [2022-01-10 03:54:02,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=926, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 03:54:02,864 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 113 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:54:02,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 19 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 03:54:02,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-10 03:54:02,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2022-01-10 03:54:02,869 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) [2022-01-10 03:54:02,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-01-10 03:54:02,869 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2022-01-10 03:54:02,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:54:02,870 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-01-10 03:54:02,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2022-01-10 03:54:02,870 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-01-10 03:54:02,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 03:54:02,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:54:02,870 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:54:02,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-01-10 03:54:03,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:54:03,071 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:54:03,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:54:03,071 INFO L85 PathProgramCache]: Analyzing trace with hash -827015692, now seen corresponding path program 7 times [2022-01-10 03:54:03,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:54:03,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059020656] [2022-01-10 03:54:03,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 03:54:03,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:54:03,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:54:03,074 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:54:03,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process