/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/lcm1_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:23:29,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:23:29,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:23:29,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 03:23:29,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 03:23:29,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 03:23:29,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 03:23:29,857 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 03:23:29,878 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:23:29,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:23:29,879 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:23:29,879 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:23:29,879 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:23:29,879 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:23:29,880 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:23:29,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:23:29,880 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:23:29,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:23:29,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:23:29,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:23:29,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:23:29,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:23:29,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:23:29,881 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:23:29,881 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:23:29,881 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:23:29,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:23:29,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:23:29,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:23:29,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:23:29,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:23:29,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:23:29,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:23:29,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:23:29,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:23:29,882 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:23:29,882 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:23:29,882 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:23:29,882 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:23:29,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:23:29,882 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:23:29,883 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:23:30,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:23:30,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:23:30,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:23:30,052 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:23:30,055 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:23:30,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound20.c [2022-01-10 03:23:30,102 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c522ca0ed/88ea7aaac354499e84437c3d393f3a50/FLAG82ca9afe7 [2022-01-10 03:23:30,416 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:23:30,417 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound20.c [2022-01-10 03:23:30,421 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c522ca0ed/88ea7aaac354499e84437c3d393f3a50/FLAG82ca9afe7 [2022-01-10 03:23:30,431 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c522ca0ed/88ea7aaac354499e84437c3d393f3a50 [2022-01-10 03:23:30,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:23:30,433 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:23:30,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:23:30,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:23:30,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:23:30,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:23:30" (1/1) ... [2022-01-10 03:23:30,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79f00e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:30, skipping insertion in model container [2022-01-10 03:23:30,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:23:30" (1/1) ... [2022-01-10 03:23:30,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:23:30,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:23:30,566 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/lcm1_valuebound20.c[552,565] [2022-01-10 03:23:30,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:23:30,582 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:23:30,591 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/lcm1_valuebound20.c[552,565] [2022-01-10 03:23:30,596 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:23:30,604 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:23:30,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:30 WrapperNode [2022-01-10 03:23:30,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:23:30,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:23:30,605 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:23:30,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:23:30,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:30" (1/1) ... [2022-01-10 03:23:30,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:30" (1/1) ... [2022-01-10 03:23:30,630 INFO L137 Inliner]: procedures = 14, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 66 [2022-01-10 03:23:30,630 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:23:30,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:23:30,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:23:30,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:23:30,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:30" (1/1) ... [2022-01-10 03:23:30,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:30" (1/1) ... [2022-01-10 03:23:30,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:30" (1/1) ... [2022-01-10 03:23:30,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:30" (1/1) ... [2022-01-10 03:23:30,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:30" (1/1) ... [2022-01-10 03:23:30,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:30" (1/1) ... [2022-01-10 03:23:30,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:30" (1/1) ... [2022-01-10 03:23:30,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:23:30,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:23:30,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:23:30,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:23:30,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:30" (1/1) ... [2022-01-10 03:23:30,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:23:30,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:23:30,694 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 03:23:30,698 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 03:23:30,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:23:30,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:23:30,716 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 03:23:30,716 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 03:23:30,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:23:30,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:23:30,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-10 03:23:30,716 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-10 03:23:30,753 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:23:30,754 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:23:30,851 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:23:30,855 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:23:30,855 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 03:23:30,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:23:30 BoogieIcfgContainer [2022-01-10 03:23:30,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:23:30,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:23:30,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:23:30,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:23:30,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:23:30" (1/3) ... [2022-01-10 03:23:30,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce15837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:23:30, skipping insertion in model container [2022-01-10 03:23:30,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:30" (2/3) ... [2022-01-10 03:23:30,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce15837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:23:30, skipping insertion in model container [2022-01-10 03:23:30,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:23:30" (3/3) ... [2022-01-10 03:23:30,863 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_valuebound20.c [2022-01-10 03:23:30,866 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:23:30,866 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:23:30,894 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:23:30,899 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 03:23:30,899 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:23:30,909 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 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 03:23:30,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-10 03:23:30,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:23:30,913 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:23:30,914 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:23:30,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:23:30,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1807347491, now seen corresponding path program 1 times [2022-01-10 03:23:30,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:23:30,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949569321] [2022-01-10 03:23:30,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:23:30,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:23:30,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:23:30,927 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 03:23:30,928 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 03:23:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:23:31,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:23:31,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:23:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 03:23:31,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:23:31,087 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:23:31,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949569321] [2022-01-10 03:23:31,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949569321] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:23:31,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:23:31,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:23:31,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395563961] [2022-01-10 03:23:31,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:23:31,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:23:31,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:23:31,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:23:31,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:23:31,111 INFO L87 Difference]: Start difference. First operand has 35 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 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 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:23:31,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:23:31,125 INFO L93 Difference]: Finished difference Result 67 states and 115 transitions. [2022-01-10 03:23:31,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:23:31,126 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-01-10 03:23:31,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:23:31,131 INFO L225 Difference]: With dead ends: 67 [2022-01-10 03:23:31,131 INFO L226 Difference]: Without dead ends: 31 [2022-01-10 03:23:31,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 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 03:23:31,136 INFO L933 BasicCegarLoop]: 46 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, 46 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 03:23:31,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:23:31,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-10 03:23:31,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-01-10 03:23:31,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 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 03:23:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2022-01-10 03:23:31,176 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2022-01-10 03:23:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:23:31,176 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2022-01-10 03:23:31,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:23:31,177 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2022-01-10 03:23:31,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-10 03:23:31,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:23:31,179 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:23:31,189 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 03:23:31,386 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 03:23:31,387 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:23:31,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:23:31,388 INFO L85 PathProgramCache]: Analyzing trace with hash 197197551, now seen corresponding path program 1 times [2022-01-10 03:23:31,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:23:31,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [539205663] [2022-01-10 03:23:31,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:23:31,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:23:31,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:23:31,389 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 03:23:31,390 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 03:23:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:23:31,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 03:23:31,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:23:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 03:23:31,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:23:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-10 03:23:32,788 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:23:32,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [539205663] [2022-01-10 03:23:32,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [539205663] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:23:32,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:23:32,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2022-01-10 03:23:32,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074611431] [2022-01-10 03:23:32,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:23:32,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:23:32,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:23:32,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:23:32,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:23:32,790 INFO L87 Difference]: Start difference. First operand 31 states and 42 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:23:35,279 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 03:23:37,592 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 03:23:37,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:23:37,954 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-01-10 03:23:37,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:23:37,960 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-01-10 03:23:37,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:23:37,961 INFO L225 Difference]: With dead ends: 48 [2022-01-10 03:23:37,961 INFO L226 Difference]: Without dead ends: 46 [2022-01-10 03:23:37,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-10 03:23:37,962 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:23:37,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 130 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2022-01-10 03:23:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-10 03:23:37,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2022-01-10 03:23:37,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-10 03:23:37,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2022-01-10 03:23:37,969 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 39 [2022-01-10 03:23:37,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:23:37,969 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2022-01-10 03:23:37,969 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:23:37,969 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2022-01-10 03:23:37,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 03:23:37,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:23:37,970 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2022-01-10 03:23:37,981 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 03:23:38,177 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 03:23:38,178 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:23:38,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:23:38,178 INFO L85 PathProgramCache]: Analyzing trace with hash -857401627, now seen corresponding path program 1 times [2022-01-10 03:23:38,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:23:38,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234820940] [2022-01-10 03:23:38,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:23:38,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:23:38,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:23:38,180 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 03:23:38,181 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 03:23:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:23:38,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 03:23:38,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:23:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 03:23:38,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:23:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-10 03:23:40,423 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:23:40,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234820940] [2022-01-10 03:23:40,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234820940] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:23:40,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:23:40,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2022-01-10 03:23:40,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445396688] [2022-01-10 03:23:40,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:23:40,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:23:40,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:23:40,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:23:40,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-10 03:23:40,424 INFO L87 Difference]: Start difference. First operand 44 states and 60 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, (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 03:23:41,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:23:41,581 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2022-01-10 03:23:41,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 03:23:41,587 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, (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 45 [2022-01-10 03:23:41,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:23:41,588 INFO L225 Difference]: With dead ends: 61 [2022-01-10 03:23:41,588 INFO L226 Difference]: Without dead ends: 59 [2022-01-10 03:23:41,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:23:41,590 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 10 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:23:41,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 145 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 03:23:41,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-10 03:23:41,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-01-10 03:23:41,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 37 states have internal predecessors, (45), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-10 03:23:41,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 80 transitions. [2022-01-10 03:23:41,599 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 80 transitions. Word has length 45 [2022-01-10 03:23:41,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:23:41,599 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 80 transitions. [2022-01-10 03:23:41,600 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, (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 03:23:41,600 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 80 transitions. [2022-01-10 03:23:41,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 03:23:41,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:23:41,601 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2022-01-10 03:23:41,610 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 03:23:41,802 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 03:23:41,803 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:23:41,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:23:41,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1563788950, now seen corresponding path program 1 times [2022-01-10 03:23:41,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:23:41,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980310187] [2022-01-10 03:23:41,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:23:41,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:23:41,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:23:41,805 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 03:23:41,806 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 03:23:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:23:41,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 03:23:41,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:23:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-10 03:23:41,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:23:41,940 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:23:41,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980310187] [2022-01-10 03:23:41,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980310187] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:23:41,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:23:41,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 03:23:41,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416297452] [2022-01-10 03:23:41,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:23:41,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:23:41,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:23:41,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:23:41,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:23:41,942 INFO L87 Difference]: Start difference. First operand 58 states and 80 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 03:23:42,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:23:42,109 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2022-01-10 03:23:42,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 03:23:42,110 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-01-10 03:23:42,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:23:42,110 INFO L225 Difference]: With dead ends: 64 [2022-01-10 03:23:42,110 INFO L226 Difference]: Without dead ends: 52 [2022-01-10 03:23:42,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 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 03:23:42,111 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 5 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:23:42,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 152 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 03:23:42,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-10 03:23:42,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-01-10 03:23:42,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 32 states have (on average 1.25) internal successors, (40), 33 states have internal predecessors, (40), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-10 03:23:42,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2022-01-10 03:23:42,118 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 50 [2022-01-10 03:23:42,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:23:42,118 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2022-01-10 03:23:42,118 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 03:23:42,118 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2022-01-10 03:23:42,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-10 03:23:42,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:23:42,119 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1] [2022-01-10 03:23:42,127 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 03:23:42,327 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 03:23:42,327 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:23:42,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:23:42,328 INFO L85 PathProgramCache]: Analyzing trace with hash 696987010, now seen corresponding path program 1 times [2022-01-10 03:23:42,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:23:42,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192552090] [2022-01-10 03:23:42,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:23:42,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:23:42,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:23:42,332 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 03:23:42,332 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 03:23:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:23:42,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-10 03:23:42,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:23:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-10 03:23:43,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:23:48,072 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-01-10 03:23:48,072 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:23:48,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [192552090] [2022-01-10 03:23:48,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [192552090] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:23:48,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:23:48,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 19 [2022-01-10 03:23:48,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50404806] [2022-01-10 03:23:48,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:23:48,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 03:23:48,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:23:48,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 03:23:48,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-10 03:23:48,073 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand has 19 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-01-10 03:23:56,020 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 03:24:00,072 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:24:02,079 WARN L534 Checker$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 03:24:02,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:24:02,520 INFO L93 Difference]: Finished difference Result 84 states and 115 transitions. [2022-01-10 03:24:02,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 03:24:02,526 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 53 [2022-01-10 03:24:02,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:24:02,528 INFO L225 Difference]: With dead ends: 84 [2022-01-10 03:24:02,528 INFO L226 Difference]: Without dead ends: 82 [2022-01-10 03:24:02,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-01-10 03:24:02,529 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 127 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 107 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:24:02,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 214 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 319 Invalid, 3 Unknown, 0 Unchecked, 13.3s Time] [2022-01-10 03:24:02,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-10 03:24:02,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2022-01-10 03:24:02,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 50 states have internal predecessors, (61), 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 03:24:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2022-01-10 03:24:02,540 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 53 [2022-01-10 03:24:02,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:24:02,540 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2022-01-10 03:24:02,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-01-10 03:24:02,540 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2022-01-10 03:24:02,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 03:24:02,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:24:02,541 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1, 1] [2022-01-10 03:24:02,560 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 03:24:02,751 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 03:24:02,752 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:24:02,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:24:02,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1380457715, now seen corresponding path program 1 times [2022-01-10 03:24:02,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:24:02,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752271146] [2022-01-10 03:24:02,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:24:02,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:24:02,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:24:02,753 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 03:24:02,754 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 03:24:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:24:02,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-10 03:24:02,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:24:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-10 03:24:03,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:24:09,009 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:24:09,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752271146] [2022-01-10 03:24:09,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752271146] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 03:24:09,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1874091652] [2022-01-10 03:24:09,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:24:09,010 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 03:24:09,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 03:24:09,011 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 03:24:09,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-01-10 03:24:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:24:09,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 03:24:09,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:24:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-10 03:24:09,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:24:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-01-10 03:24:15,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1874091652] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:24:15,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:24:15,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17, 7] total 22 [2022-01-10 03:24:15,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395611999] [2022-01-10 03:24:15,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:24:15,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:24:15,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:24:15,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:24:15,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2022-01-10 03:24:15,626 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 03:24:18,286 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 03:24:18,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:24:18,956 INFO L93 Difference]: Finished difference Result 104 states and 142 transitions. [2022-01-10 03:24:18,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:24:18,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 67 [2022-01-10 03:24:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:24:18,963 INFO L225 Difference]: With dead ends: 104 [2022-01-10 03:24:18,964 INFO L226 Difference]: Without dead ends: 102 [2022-01-10 03:24:18,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-01-10 03:24:18,964 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:24:18,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 120 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-01-10 03:24:18,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-10 03:24:18,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2022-01-10 03:24:18,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 68 states have internal predecessors, (82), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-01-10 03:24:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 139 transitions. [2022-01-10 03:24:18,985 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 139 transitions. Word has length 67 [2022-01-10 03:24:18,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:24:18,985 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 139 transitions. [2022-01-10 03:24:18,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 03:24:18,986 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 139 transitions. [2022-01-10 03:24:18,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 03:24:18,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:24:18,988 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:24:18,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2022-01-10 03:24:19,198 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 03:24:19,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:24:19,391 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:24:19,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:24:19,391 INFO L85 PathProgramCache]: Analyzing trace with hash 597113487, now seen corresponding path program 1 times [2022-01-10 03:24:19,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:24:19,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091022507] [2022-01-10 03:24:19,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:24:19,392 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:24:19,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:24:19,393 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 03:24:19,394 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 03:24:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:24:19,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-10 03:24:19,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:24:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-01-10 03:24:20,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:24:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-10 03:24:25,919 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:24:25,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091022507] [2022-01-10 03:24:25,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091022507] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:24:25,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:24:25,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 21 [2022-01-10 03:24:25,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953156783] [2022-01-10 03:24:25,919 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:24:25,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 03:24:25,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:24:25,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 03:24:25,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-01-10 03:24:25,920 INFO L87 Difference]: Start difference. First operand 101 states and 139 transitions. Second operand has 21 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 12 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-01-10 03:24:29,894 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 03:24:33,509 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 03:24:34,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:24:34,154 INFO L93 Difference]: Finished difference Result 216 states and 296 transitions. [2022-01-10 03:24:34,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 03:24:34,155 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 12 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 73 [2022-01-10 03:24:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:24:34,156 INFO L225 Difference]: With dead ends: 216 [2022-01-10 03:24:34,156 INFO L226 Difference]: Without dead ends: 117 [2022-01-10 03:24:34,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-01-10 03:24:34,158 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 69 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 54 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-01-10 03:24:34,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 241 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 338 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2022-01-10 03:24:34,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-10 03:24:34,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 89. [2022-01-10 03:24:34,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 60 states have internal predecessors, (67), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-10 03:24:34,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 113 transitions. [2022-01-10 03:24:34,167 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 113 transitions. Word has length 73 [2022-01-10 03:24:34,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:24:34,167 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 113 transitions. [2022-01-10 03:24:34,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 12 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-01-10 03:24:34,167 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 113 transitions. [2022-01-10 03:24:34,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-10 03:24:34,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:24:34,168 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:24:34,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-01-10 03:24:34,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:24:34,376 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:24:34,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:24:34,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2125426086, now seen corresponding path program 1 times [2022-01-10 03:24:34,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:24:34,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797540539] [2022-01-10 03:24:34,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:24:34,377 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:24:34,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:24:34,377 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:24:34,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 03:24:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:24:34,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-10 03:24:34,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:24:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 16 proven. 46 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-10 03:24:36,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:24:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-01-10 03:24:40,874 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:24:40,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797540539] [2022-01-10 03:24:40,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797540539] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:24:40,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:24:40,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7] total 22 [2022-01-10 03:24:40,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682622700] [2022-01-10 03:24:40,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:24:40,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 03:24:40,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:24:40,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 03:24:40,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-01-10 03:24:40,876 INFO L87 Difference]: Start difference. First operand 89 states and 113 transitions. Second operand has 22 states, 20 states have (on average 2.25) internal successors, (45), 17 states have internal predecessors, (45), 12 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 11 states have call predecessors, (21), 10 states have call successors, (21) [2022-01-10 03:24:46,317 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 03:24:48,767 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 []