/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/egcd-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:07:30,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:07:30,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:07:30,793 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 03:07:30,830 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 03:07:30,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 03:07:30,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 03:07:30,834 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 03:07:30,854 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:07:30,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:07:30,854 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:07:30,855 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:07:30,860 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:07:30,861 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:07:30,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:07:30,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:07:30,861 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:07:30,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:07:30,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:07:30,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:07:30,862 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:07:30,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:07:30,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:07:30,863 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:07:30,863 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:07:30,863 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:07:30,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:07:30,863 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:07:30,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:07:30,863 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:07:30,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:07:30,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:07:30,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:07:30,864 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:07:30,864 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:07:30,864 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:07:30,864 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:07:30,864 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:07:30,864 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:07:30,864 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:07:30,864 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:07:30,864 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:07:31,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:07:31,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:07:31,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:07:31,049 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:07:31,050 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:07:31,051 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound2.c [2022-01-10 03:07:31,089 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdf2305e4/57e2947010f241f7ae1d7afe2e422cf2/FLAG127f010cb [2022-01-10 03:07:31,444 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:07:31,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound2.c [2022-01-10 03:07:31,450 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdf2305e4/57e2947010f241f7ae1d7afe2e422cf2/FLAG127f010cb [2022-01-10 03:07:31,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdf2305e4/57e2947010f241f7ae1d7afe2e422cf2 [2022-01-10 03:07:31,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:07:31,467 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:07:31,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:07:31,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:07:31,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:07:31,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:07:31" (1/1) ... [2022-01-10 03:07:31,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@121ddd71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:07:31, skipping insertion in model container [2022-01-10 03:07:31,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:07:31" (1/1) ... [2022-01-10 03:07:31,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:07:31,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:07:31,615 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/egcd-ll_valuebound2.c[489,502] [2022-01-10 03:07:31,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:07:31,649 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:07:31,657 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/egcd-ll_valuebound2.c[489,502] [2022-01-10 03:07:31,662 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:07:31,670 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:07:31,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:07:31 WrapperNode [2022-01-10 03:07:31,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:07:31,671 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:07:31,671 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:07:31,671 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:07:31,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:07:31" (1/1) ... [2022-01-10 03:07:31,682 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:07:31" (1/1) ... [2022-01-10 03:07:31,693 INFO L137 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2022-01-10 03:07:31,694 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:07:31,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:07:31,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:07:31,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:07:31,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:07:31" (1/1) ... [2022-01-10 03:07:31,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:07:31" (1/1) ... [2022-01-10 03:07:31,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:07:31" (1/1) ... [2022-01-10 03:07:31,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:07:31" (1/1) ... [2022-01-10 03:07:31,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:07:31" (1/1) ... [2022-01-10 03:07:31,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:07:31" (1/1) ... [2022-01-10 03:07:31,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:07:31" (1/1) ... [2022-01-10 03:07:31,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:07:31,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:07:31,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:07:31,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:07:31,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:07:31" (1/1) ... [2022-01-10 03:07:31,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:07:31,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:07:31,742 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 03:07:31,746 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 03:07:31,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:07:31,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:07:31,767 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 03:07:31,767 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 03:07:31,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:07:31,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:07:31,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-10 03:07:31,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-10 03:07:31,807 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:07:31,808 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:07:31,929 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:07:31,937 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:07:31,937 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 03:07:31,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:07:31 BoogieIcfgContainer [2022-01-10 03:07:31,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:07:31,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:07:31,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:07:31,960 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:07:31,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:07:31" (1/3) ... [2022-01-10 03:07:31,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413b8cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:07:31, skipping insertion in model container [2022-01-10 03:07:31,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:07:31" (2/3) ... [2022-01-10 03:07:31,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413b8cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:07:31, skipping insertion in model container [2022-01-10 03:07:31,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:07:31" (3/3) ... [2022-01-10 03:07:31,962 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound2.c [2022-01-10 03:07:31,965 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:07:31,965 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:07:31,999 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:07:32,003 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 03:07:32,003 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:07:32,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-10 03:07:32,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 03:07:32,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:07:32,018 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:07:32,018 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:07:32,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:07:32,022 INFO L85 PathProgramCache]: Analyzing trace with hash 516392259, now seen corresponding path program 1 times [2022-01-10 03:07:32,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:07:32,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816025798] [2022-01-10 03:07:32,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:07:32,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:07:32,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:07:32,042 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 03:07:32,044 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 03:07:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:07:32,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:07:32,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:07:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-10 03:07:32,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:07:32,199 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:07:32,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816025798] [2022-01-10 03:07:32,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816025798] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:07:32,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:07:32,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:07:32,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115646801] [2022-01-10 03:07:32,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:07:32,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:07:32,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:07:32,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:07:32,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:07:32,236 INFO L87 Difference]: Start difference. First operand has 32 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 03:07:32,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:07:32,261 INFO L93 Difference]: Finished difference Result 61 states and 99 transitions. [2022-01-10 03:07:32,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:07:32,263 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-01-10 03:07:32,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:07:32,274 INFO L225 Difference]: With dead ends: 61 [2022-01-10 03:07:32,274 INFO L226 Difference]: Without dead ends: 28 [2022-01-10 03:07:32,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 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 03:07:32,284 INFO L933 BasicCegarLoop]: 42 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, 42 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 03:07:32,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:07:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-10 03:07:32,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-10 03:07:32,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-10 03:07:32,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2022-01-10 03:07:32,318 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 29 [2022-01-10 03:07:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:07:32,319 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2022-01-10 03:07:32,320 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 03:07:32,320 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2022-01-10 03:07:32,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 03:07:32,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:07:32,321 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:07:32,330 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 03:07:32,527 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 03:07:32,528 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:07:32,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:07:32,529 INFO L85 PathProgramCache]: Analyzing trace with hash 501437177, now seen corresponding path program 1 times [2022-01-10 03:07:32,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:07:32,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087733699] [2022-01-10 03:07:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:07:32,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:07:32,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:07:32,531 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 03:07:32,532 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 03:07:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:07:32,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:07:32,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:07:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-10 03:07:32,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:07:32,771 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:07:32,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087733699] [2022-01-10 03:07:32,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087733699] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:07:32,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:07:32,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 03:07:32,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755479895] [2022-01-10 03:07:32,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:07:32,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:07:32,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:07:32,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:07:32,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:07:32,779 INFO L87 Difference]: Start difference. First operand 28 states and 38 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 03:07:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:07:33,588 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2022-01-10 03:07:33,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 03:07:33,603 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-01-10 03:07:33,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:07:33,604 INFO L225 Difference]: With dead ends: 44 [2022-01-10 03:07:33,605 INFO L226 Difference]: Without dead ends: 42 [2022-01-10 03:07:33,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:07:33,606 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 03:07:33,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 139 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 03:07:33,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-10 03:07:33,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-01-10 03:07:33,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-10 03:07:33,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2022-01-10 03:07:33,613 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 29 [2022-01-10 03:07:33,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:07:33,614 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 58 transitions. [2022-01-10 03:07:33,614 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 03:07:33,614 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 58 transitions. [2022-01-10 03:07:33,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 03:07:33,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:07:33,615 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:07:33,623 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 03:07:33,817 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 03:07:33,817 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:07:33,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:07:33,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1017640517, now seen corresponding path program 1 times [2022-01-10 03:07:33,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:07:33,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248408138] [2022-01-10 03:07:33,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:07:33,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:07:33,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:07:33,821 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 03:07:33,822 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 03:07:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:07:33,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 03:07:33,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:07:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 03:07:34,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:07:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-10 03:07:37,634 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:07:37,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248408138] [2022-01-10 03:07:37,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248408138] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:07:37,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:07:37,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-01-10 03:07:37,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175157410] [2022-01-10 03:07:37,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:07:37,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:07:37,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:07:37,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:07:37,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-10 03:07:37,636 INFO L87 Difference]: Start difference. First operand 41 states and 58 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:07:41,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:07:41,031 INFO L93 Difference]: Finished difference Result 66 states and 98 transitions. [2022-01-10 03:07:41,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:07:41,058 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-01-10 03:07:41,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:07:41,061 INFO L225 Difference]: With dead ends: 66 [2022-01-10 03:07:41,061 INFO L226 Difference]: Without dead ends: 64 [2022-01-10 03:07:41,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:07:41,062 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:07:41,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 138 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-01-10 03:07:41,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-10 03:07:41,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2022-01-10 03:07:41,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 31 states have internal predecessors, (38), 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 03:07:41,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 83 transitions. [2022-01-10 03:07:41,080 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 83 transitions. Word has length 34 [2022-01-10 03:07:41,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:07:41,081 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 83 transitions. [2022-01-10 03:07:41,081 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:07:41,081 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 83 transitions. [2022-01-10 03:07:41,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-10 03:07:41,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:07:41,082 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:07:41,094 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 03:07:41,282 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 03:07:41,282 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:07:41,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:07:41,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1133401081, now seen corresponding path program 1 times [2022-01-10 03:07:41,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:07:41,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [880448023] [2022-01-10 03:07:41,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:07:41,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:07:41,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:07:41,285 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 03:07:41,286 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 03:07:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:07:41,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 03:07:41,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:07:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 03:07:41,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:07:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 03:07:45,297 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:07:45,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [880448023] [2022-01-10 03:07:45,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [880448023] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:07:45,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:07:45,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-01-10 03:07:45,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473768307] [2022-01-10 03:07:45,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:07:45,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:07:45,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:07:45,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:07:45,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-10 03:07:45,299 INFO L87 Difference]: Start difference. First operand 57 states and 83 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 03:07:51,158 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 03:07:51,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:07:51,870 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2022-01-10 03:07:51,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:07:51,887 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-01-10 03:07:51,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:07:51,888 INFO L225 Difference]: With dead ends: 64 [2022-01-10 03:07:51,888 INFO L226 Difference]: Without dead ends: 62 [2022-01-10 03:07:51,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:07:51,889 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:07:51,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 138 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2022-01-10 03:07:51,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-10 03:07:51,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-01-10 03:07:51,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 32 states have (on average 1.28125) internal successors, (41), 34 states have internal predecessors, (41), 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 03:07:51,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 86 transitions. [2022-01-10 03:07:51,899 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 86 transitions. Word has length 39 [2022-01-10 03:07:51,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:07:51,899 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 86 transitions. [2022-01-10 03:07:51,899 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 03:07:51,900 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 86 transitions. [2022-01-10 03:07:51,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 03:07:51,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:07:51,900 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2022-01-10 03:07:51,912 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 03:07:52,110 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 03:07:52,110 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:07:52,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:07:52,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1954831506, now seen corresponding path program 1 times [2022-01-10 03:07:52,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:07:52,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257330383] [2022-01-10 03:07:52,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:07:52,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:07:52,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:07:52,113 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 03:07:52,114 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 03:07:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:07:52,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 03:07:52,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:07:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 03:07:52,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:07:52,459 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:07:52,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257330383] [2022-01-10 03:07:52,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257330383] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:07:52,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:07:52,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 03:07:52,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241906413] [2022-01-10 03:07:52,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:07:52,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:07:52,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:07:52,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:07:52,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:07:52,461 INFO L87 Difference]: Start difference. First operand 61 states and 86 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 03:07:53,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:07:53,437 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2022-01-10 03:07:53,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 03:07:53,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-01-10 03:07:53,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:07:53,452 INFO L225 Difference]: With dead ends: 67 [2022-01-10 03:07:53,452 INFO L226 Difference]: Without dead ends: 65 [2022-01-10 03:07:53,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:07:53,452 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:07:53,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 131 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 03:07:53,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-10 03:07:53,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-01-10 03:07:53,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 37 states have internal predecessors, (44), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-10 03:07:53,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2022-01-10 03:07:53,461 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 45 [2022-01-10 03:07:53,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:07:53,462 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2022-01-10 03:07:53,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 03:07:53,462 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2022-01-10 03:07:53,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 03:07:53,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:07:53,463 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2022-01-10 03:07:53,474 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 03:07:53,671 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 03:07:53,671 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:07:53,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:07:53,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1265228631, now seen corresponding path program 1 times [2022-01-10 03:07:53,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:07:53,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012058940] [2022-01-10 03:07:53,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:07:53,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:07:53,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:07:53,674 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 03:07:53,674 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 03:07:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:07:53,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 03:07:53,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:07:54,146 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 03:07:54,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:07:54,147 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:07:54,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012058940] [2022-01-10 03:07:54,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012058940] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:07:54,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:07:54,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 03:07:54,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417485789] [2022-01-10 03:07:54,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:07:54,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:07:54,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:07:54,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:07:54,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:07:54,148 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 03:07:54,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:07:54,915 INFO L93 Difference]: Finished difference Result 82 states and 110 transitions. [2022-01-10 03:07:54,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 03:07:54,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-01-10 03:07:54,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:07:54,931 INFO L225 Difference]: With dead ends: 82 [2022-01-10 03:07:54,932 INFO L226 Difference]: Without dead ends: 80 [2022-01-10 03:07:54,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:07:54,932 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 03:07:54,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 139 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 03:07:54,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-10 03:07:54,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-01-10 03:07:54,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 45 states have internal predecessors, (50), 29 states have call successors, (29), 8 states have call predecessors, (29), 8 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2022-01-10 03:07:54,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 107 transitions. [2022-01-10 03:07:54,942 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 107 transitions. Word has length 47 [2022-01-10 03:07:54,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:07:54,942 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 107 transitions. [2022-01-10 03:07:54,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 03:07:54,942 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 107 transitions. [2022-01-10 03:07:54,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 03:07:54,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:07:54,943 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:07:54,959 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 03:07:55,147 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 03:07:55,148 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:07:55,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:07:55,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1617953190, now seen corresponding path program 1 times [2022-01-10 03:07:55,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:07:55,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052029315] [2022-01-10 03:07:55,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:07:55,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:07:55,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:07:55,149 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 03:07:55,150 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 03:07:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:07:55,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 03:07:55,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:07:56,104 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-01-10 03:07:56,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:08:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-10 03:08:03,656 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:08:03,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052029315] [2022-01-10 03:08:03,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052029315] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:08:03,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:08:03,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2022-01-10 03:08:03,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779095210] [2022-01-10 03:08:03,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:08:03,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:08:03,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:08:03,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:08:03,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-10 03:08:03,658 INFO L87 Difference]: Start difference. First operand 79 states and 107 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 03:08:08,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:08:08,844 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2022-01-10 03:08:08,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 03:08:08,857 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-01-10 03:08:08,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:08:08,858 INFO L225 Difference]: With dead ends: 86 [2022-01-10 03:08:08,858 INFO L226 Difference]: Without dead ends: 84 [2022-01-10 03:08:08,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:08:08,859 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-01-10 03:08:08,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 139 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-01-10 03:08:08,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-10 03:08:08,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-01-10 03:08:08,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 48 states have internal predecessors, (53), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2022-01-10 03:08:08,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 110 transitions. [2022-01-10 03:08:08,868 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 110 transitions. Word has length 50 [2022-01-10 03:08:08,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:08:08,868 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 110 transitions. [2022-01-10 03:08:08,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 03:08:08,868 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 110 transitions. [2022-01-10 03:08:08,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-10 03:08:08,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:08:08,869 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:08:08,884 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 03:08:09,080 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 03:08:09,082 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:08:09,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:08:09,083 INFO L85 PathProgramCache]: Analyzing trace with hash 860577929, now seen corresponding path program 1 times [2022-01-10 03:08:09,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:08:09,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56670836] [2022-01-10 03:08:09,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:08:09,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:08:09,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:08:09,084 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 03:08:09,085 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 03:08:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:08:09,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-10 03:08:09,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:08:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-10 03:08:10,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:08:33,642 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-10 03:08:33,643 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:08:33,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56670836] [2022-01-10 03:08:33,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56670836] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:08:33,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:08:33,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2022-01-10 03:08:33,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89893058] [2022-01-10 03:08:33,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:08:33,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 03:08:33,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:08:33,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 03:08:33,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:08:33,644 INFO L87 Difference]: Start difference. First operand 83 states and 110 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2022-01-10 03:08:48,675 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 []