/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/nla-digbench-scaling/cohendiv-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:03:17,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:03:17,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:03:17,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 03:03:17,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 03:03:17,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 03:03:17,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 03:03:17,988 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 03:03:18,005 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:03:18,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:03:18,005 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:03:18,005 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:03:18,006 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:03:18,006 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:03:18,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:03:18,006 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:03:18,007 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:03:18,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:03:18,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:03:18,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:03:18,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:03:18,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:03:18,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:03:18,008 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:03:18,008 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:03:18,008 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:03:18,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:03:18,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:03:18,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:03:18,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:03:18,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:03:18,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:03:18,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:03:18,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:03:18,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:03:18,009 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:03:18,010 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:03:18,010 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:03:18,010 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:03:18,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:03:18,010 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:03:18,010 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:03:18,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:03:18,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:03:18,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:03:18,220 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:03:18,221 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:03:18,222 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound20.c [2022-01-10 03:03:18,278 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81b163372/6d23d0f6a90a40e484bfe0257fde742d/FLAG5d1f56f00 [2022-01-10 03:03:18,604 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:03:18,605 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound20.c [2022-01-10 03:03:18,608 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81b163372/6d23d0f6a90a40e484bfe0257fde742d/FLAG5d1f56f00 [2022-01-10 03:03:18,621 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81b163372/6d23d0f6a90a40e484bfe0257fde742d [2022-01-10 03:03:18,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:03:18,623 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:03:18,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:03:18,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:03:18,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:03:18,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:03:18" (1/1) ... [2022-01-10 03:03:18,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20226f55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:18, skipping insertion in model container [2022-01-10 03:03:18,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:03:18" (1/1) ... [2022-01-10 03:03:18,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:03:18,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:03:18,761 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound20.c[576,589] [2022-01-10 03:03:18,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:03:18,779 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:03:18,786 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound20.c[576,589] [2022-01-10 03:03:18,790 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:03:18,798 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:03:18,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:18 WrapperNode [2022-01-10 03:03:18,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:03:18,799 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:03:18,799 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:03:18,800 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:03:18,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:18" (1/1) ... [2022-01-10 03:03:18,812 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:18" (1/1) ... [2022-01-10 03:03:18,823 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2022-01-10 03:03:18,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:03:18,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:03:18,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:03:18,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:03:18,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:18" (1/1) ... [2022-01-10 03:03:18,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:18" (1/1) ... [2022-01-10 03:03:18,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:18" (1/1) ... [2022-01-10 03:03:18,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:18" (1/1) ... [2022-01-10 03:03:18,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:18" (1/1) ... [2022-01-10 03:03:18,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:18" (1/1) ... [2022-01-10 03:03:18,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:18" (1/1) ... [2022-01-10 03:03:18,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:03:18,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:03:18,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:03:18,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:03:18,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:18" (1/1) ... [2022-01-10 03:03:18,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:03:18,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:03:18,873 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 03:03:18,879 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 03:03:18,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:03:18,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:03:18,901 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 03:03:18,901 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 03:03:18,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:03:18,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:03:18,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-10 03:03:18,901 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-10 03:03:18,943 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:03:18,944 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:03:19,047 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:03:19,052 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:03:19,052 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 03:03:19,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:03:19 BoogieIcfgContainer [2022-01-10 03:03:19,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:03:19,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:03:19,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:03:19,058 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:03:19,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:03:18" (1/3) ... [2022-01-10 03:03:19,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b30954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:03:19, skipping insertion in model container [2022-01-10 03:03:19,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:18" (2/3) ... [2022-01-10 03:03:19,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b30954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:03:19, skipping insertion in model container [2022-01-10 03:03:19,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:03:19" (3/3) ... [2022-01-10 03:03:19,071 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound20.c [2022-01-10 03:03:19,074 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:03:19,074 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:03:19,138 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:03:19,148 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 03:03:19,149 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:03:19,162 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-10 03:03:19,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 03:03:19,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:03:19,171 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:03:19,171 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:03:19,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:03:19,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1418986431, now seen corresponding path program 1 times [2022-01-10 03:03:19,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:03:19,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [637558578] [2022-01-10 03:03:19,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:03:19,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:03:19,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:03:19,190 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 03:03:19,191 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 03:03:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:03:19,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:03:19,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:03:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:03:19,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:03:19,337 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:03:19,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [637558578] [2022-01-10 03:03:19,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [637558578] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:03:19,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:03:19,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:03:19,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964615752] [2022-01-10 03:03:19,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:03:19,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:03:19,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:03:19,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:03:19,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:03:19,360 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 03:03:19,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:03:19,380 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2022-01-10 03:03:19,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:03:19,382 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-01-10 03:03:19,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:03:19,390 INFO L225 Difference]: With dead ends: 65 [2022-01-10 03:03:19,390 INFO L226 Difference]: Without dead ends: 30 [2022-01-10 03:03:19,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 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 03:03:19,398 INFO L933 BasicCegarLoop]: 43 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, 43 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 03:03:19,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:03:19,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-10 03:03:19,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-10 03:03:19,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-10 03:03:19,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-01-10 03:03:19,434 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 24 [2022-01-10 03:03:19,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:03:19,435 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-01-10 03:03:19,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 03:03:19,435 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-01-10 03:03:19,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 03:03:19,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:03:19,436 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:03:19,446 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 03:03:19,639 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 03:03:19,640 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:03:19,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:03:19,640 INFO L85 PathProgramCache]: Analyzing trace with hash 240368937, now seen corresponding path program 1 times [2022-01-10 03:03:19,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:03:19,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397783807] [2022-01-10 03:03:19,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:03:19,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:03:19,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:03:19,642 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 03:03:19,645 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 03:03:19,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:03:19,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 03:03:19,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:03:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 03:03:19,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:03:20,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 03:03:20,655 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:03:20,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397783807] [2022-01-10 03:03:20,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397783807] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:03:20,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:03:20,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-01-10 03:03:20,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380869543] [2022-01-10 03:03:20,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:03:20,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:03:20,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:03:20,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:03:20,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-10 03:03:20,658 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 03:03:23,720 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:03:24,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:03:24,041 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2022-01-10 03:03:24,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:03:24,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-01-10 03:03:24,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:03:24,043 INFO L225 Difference]: With dead ends: 49 [2022-01-10 03:03:24,044 INFO L226 Difference]: Without dead ends: 47 [2022-01-10 03:03:24,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:03:24,045 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 11 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:03:24,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 125 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-01-10 03:03:24,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-10 03:03:24,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2022-01-10 03:03:24,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-10 03:03:24,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-01-10 03:03:24,052 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 24 [2022-01-10 03:03:24,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:03:24,053 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-01-10 03:03:24,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 03:03:24,053 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-01-10 03:03:24,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 03:03:24,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:03:24,054 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:03:24,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 03:03:24,260 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 03:03:24,261 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:03:24,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:03:24,262 INFO L85 PathProgramCache]: Analyzing trace with hash -854318377, now seen corresponding path program 1 times [2022-01-10 03:03:24,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:03:24,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134259307] [2022-01-10 03:03:24,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:03:24,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:03:24,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:03:24,263 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 03:03:24,265 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 03:03:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:03:24,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 03:03:24,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:03:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 03:03:24,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:03:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 03:03:26,251 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:03:26,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134259307] [2022-01-10 03:03:26,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134259307] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:03:26,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:03:26,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-01-10 03:03:26,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078821774] [2022-01-10 03:03:26,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:03:26,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:03:26,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:03:26,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:03:26,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:03:26,253 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:03:28,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:03:28,441 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2022-01-10 03:03:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:03:28,450 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-01-10 03:03:28,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:03:28,452 INFO L225 Difference]: With dead ends: 67 [2022-01-10 03:03:28,452 INFO L226 Difference]: Without dead ends: 64 [2022-01-10 03:03:28,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-01-10 03:03:28,453 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:03:28,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 135 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-10 03:03:28,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-10 03:03:28,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2022-01-10 03:03:28,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 36 states have internal predecessors, (40), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-10 03:03:28,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 85 transitions. [2022-01-10 03:03:28,473 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 85 transitions. Word has length 29 [2022-01-10 03:03:28,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:03:28,473 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 85 transitions. [2022-01-10 03:03:28,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:03:28,473 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 85 transitions. [2022-01-10 03:03:28,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 03:03:28,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:03:28,475 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:03:28,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 03:03:28,684 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 03:03:28,686 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:03:28,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:03:28,687 INFO L85 PathProgramCache]: Analyzing trace with hash -2056573358, now seen corresponding path program 1 times [2022-01-10 03:03:28,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:03:28,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530754232] [2022-01-10 03:03:28,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:03:28,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:03:28,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:03:28,689 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 03:03:28,690 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 03:03:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:03:28,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 03:03:28,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:03:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 03:03:29,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:03:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 03:03:29,372 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:03:29,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530754232] [2022-01-10 03:03:29,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530754232] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:03:29,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:03:29,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-01-10 03:03:29,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511118938] [2022-01-10 03:03:29,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:03:29,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 03:03:29,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:03:29,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 03:03:29,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-01-10 03:03:29,374 INFO L87 Difference]: Start difference. First operand 62 states and 85 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-10 03:03:29,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:03:29,630 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2022-01-10 03:03:29,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 03:03:29,631 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 46 [2022-01-10 03:03:29,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:03:29,632 INFO L225 Difference]: With dead ends: 68 [2022-01-10 03:03:29,632 INFO L226 Difference]: Without dead ends: 66 [2022-01-10 03:03:29,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:03:29,633 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:03:29,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 295 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 19 Unchecked, 0.2s Time] [2022-01-10 03:03:29,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-10 03:03:29,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-01-10 03:03:29,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-10 03:03:29,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 88 transitions. [2022-01-10 03:03:29,643 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 88 transitions. Word has length 46 [2022-01-10 03:03:29,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:03:29,643 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 88 transitions. [2022-01-10 03:03:29,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-10 03:03:29,644 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 88 transitions. [2022-01-10 03:03:29,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-10 03:03:29,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:03:29,644 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:03:29,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 03:03:29,854 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 03:03:29,854 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:03:29,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:03:29,855 INFO L85 PathProgramCache]: Analyzing trace with hash -2085516536, now seen corresponding path program 1 times [2022-01-10 03:03:29,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:03:29,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006574490] [2022-01-10 03:03:29,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:03:29,855 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:03:29,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:03:29,856 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 03:03:29,857 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 03:03:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:03:30,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 03:03:30,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:03:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-10 03:03:30,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:03:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-10 03:03:46,130 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:03:46,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006574490] [2022-01-10 03:03:46,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006574490] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:03:46,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:03:46,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2022-01-10 03:03:46,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668244695] [2022-01-10 03:03:46,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:03:46,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 03:03:46,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:03:46,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 03:03:46,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=388, Unknown=2, NotChecked=0, Total=462 [2022-01-10 03:03:46,131 INFO L87 Difference]: Start difference. First operand 66 states and 88 transitions. Second operand has 22 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 10 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2022-01-10 03:03:49,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:03:49,793 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2022-01-10 03:03:49,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 03:03:49,799 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 10 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) Word has length 52 [2022-01-10 03:03:49,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:03:49,800 INFO L225 Difference]: With dead ends: 74 [2022-01-10 03:03:49,800 INFO L226 Difference]: Without dead ends: 72 [2022-01-10 03:03:49,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=103, Invalid=545, Unknown=2, NotChecked=0, Total=650 [2022-01-10 03:03:49,801 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:03:49,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 269 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 171 Invalid, 0 Unknown, 41 Unchecked, 2.0s Time] [2022-01-10 03:03:49,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-10 03:03:49,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-01-10 03:03:49,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.15) internal successors, (46), 43 states have internal predecessors, (46), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-10 03:03:49,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2022-01-10 03:03:49,813 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 52 [2022-01-10 03:03:49,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:03:49,813 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2022-01-10 03:03:49,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 10 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2022-01-10 03:03:49,813 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2022-01-10 03:03:49,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 03:03:49,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:03:49,814 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:03:49,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-01-10 03:03:50,028 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 03:03:50,029 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:03:50,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:03:50,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1724367982, now seen corresponding path program 1 times [2022-01-10 03:03:50,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:03:50,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581954391] [2022-01-10 03:03:50,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:03:50,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:03:50,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:03:50,031 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 03:03:50,032 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 03:03:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:03:50,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 03:03:50,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:03:50,920 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-01-10 03:03:50,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:04:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-01-10 03:04:04,294 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:04:04,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581954391] [2022-01-10 03:04:04,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1581954391] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:04:04,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:04:04,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2022-01-10 03:04:04,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690008274] [2022-01-10 03:04:04,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:04:04,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 03:04:04,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:04:04,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 03:04:04,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-01-10 03:04:04,295 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-10 03:04:11,384 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:04:15,180 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:04:19,336 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:04:21,348 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:04:24,588 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:04:32,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:04:32,877 INFO L93 Difference]: Finished difference Result 99 states and 133 transitions. [2022-01-10 03:04:32,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 03:04:32,895 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 59 [2022-01-10 03:04:32,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:04:32,896 INFO L225 Difference]: With dead ends: 99 [2022-01-10 03:04:32,896 INFO L226 Difference]: Without dead ends: 96 [2022-01-10 03:04:32,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-01-10 03:04:32,897 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 16 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 27 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.5s IncrementalHoareTripleChecker+Time [2022-01-10 03:04:32,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 232 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 94 Invalid, 5 Unknown, 0 Unchecked, 20.5s Time] [2022-01-10 03:04:32,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-10 03:04:32,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2022-01-10 03:04:32,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 54 states have internal predecessors, (59), 33 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2022-01-10 03:04:32,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 124 transitions. [2022-01-10 03:04:32,909 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 124 transitions. Word has length 59 [2022-01-10 03:04:32,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:04:32,910 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 124 transitions. [2022-01-10 03:04:32,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-10 03:04:32,910 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 124 transitions. [2022-01-10 03:04:32,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 03:04:32,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:04:32,911 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:04:32,921 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 03:04:33,115 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 03:04:33,116 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:04:33,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:04:33,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1447152234, now seen corresponding path program 1 times [2022-01-10 03:04:33,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:04:33,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895560927] [2022-01-10 03:04:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:04:33,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:04:33,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:04:33,117 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 03:04:33,118 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 03:04:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:04:33,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 03:04:33,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:04:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-10 03:04:34,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:04:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-01-10 03:04:38,471 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:04:38,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895560927] [2022-01-10 03:04:38,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895560927] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:04:38,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:04:38,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2022-01-10 03:04:38,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410429516] [2022-01-10 03:04:38,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:04:38,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 03:04:38,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:04:38,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 03:04:38,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-01-10 03:04:38,472 INFO L87 Difference]: Start difference. First operand 92 states and 124 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)