/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/array-examples/relax-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:34:32,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:34:32,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:34:33,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 03:34:33,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 03:34:33,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 03:34:33,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 03:34:33,093 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 03:34:33,118 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:34:33,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:34:33,119 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:34:33,119 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:34:33,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:34:33,120 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:34:33,120 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:34:33,120 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:34:33,120 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:34:33,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:34:33,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:34:33,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:34:33,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:34:33,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:34:33,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:34:33,122 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:34:33,122 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:34:33,122 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:34:33,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:34:33,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:34:33,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:34:33,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:34:33,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:34:33,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:34:33,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:34:33,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:34:33,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:34:33,124 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:34:33,124 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:34:33,124 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:34:33,124 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:34:33,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:34:33,124 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:34:33,125 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:34:33,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:34:33,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:34:33,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:34:33,358 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:34:33,358 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:34:33,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/relax-2.i [2022-01-10 03:34:33,418 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfccde7fd/d9cce82615d44c5d9693d1e18a0eb8de/FLAG1e77aaeca [2022-01-10 03:34:33,802 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:34:33,802 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/relax-2.i [2022-01-10 03:34:33,820 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfccde7fd/d9cce82615d44c5d9693d1e18a0eb8de/FLAG1e77aaeca [2022-01-10 03:34:34,160 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfccde7fd/d9cce82615d44c5d9693d1e18a0eb8de [2022-01-10 03:34:34,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:34:34,164 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:34:34,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:34:34,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:34:34,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:34:34,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:34:34" (1/1) ... [2022-01-10 03:34:34,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43622f37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:34, skipping insertion in model container [2022-01-10 03:34:34,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:34:34" (1/1) ... [2022-01-10 03:34:34,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:34:34,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:34:34,386 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/relax-2.i[980,993] [2022-01-10 03:34:34,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:34:34,552 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:34:34,564 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/relax-2.i[980,993] [2022-01-10 03:34:34,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:34:34,626 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:34:34,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:34 WrapperNode [2022-01-10 03:34:34,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:34:34,628 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:34:34,628 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:34:34,628 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:34:34,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:34" (1/1) ... [2022-01-10 03:34:34,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:34" (1/1) ... [2022-01-10 03:34:34,679 INFO L137 Inliner]: procedures = 123, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 134 [2022-01-10 03:34:34,680 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:34:34,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:34:34,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:34:34,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:34:34,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:34" (1/1) ... [2022-01-10 03:34:34,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:34" (1/1) ... [2022-01-10 03:34:34,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:34" (1/1) ... [2022-01-10 03:34:34,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:34" (1/1) ... [2022-01-10 03:34:34,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:34" (1/1) ... [2022-01-10 03:34:34,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:34" (1/1) ... [2022-01-10 03:34:34,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:34" (1/1) ... [2022-01-10 03:34:34,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:34:34,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:34:34,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:34:34,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:34:34,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:34" (1/1) ... [2022-01-10 03:34:34,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:34:34,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:34:34,743 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 03:34:34,749 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 03:34:34,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 03:34:34,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-10 03:34:34,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-10 03:34:34,770 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 03:34:34,771 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 03:34:34,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 03:34:34,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:34:34,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 03:34:34,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:34:34,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:34:34,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:34:34,832 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:34:34,834 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:34:35,057 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:34:35,061 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:34:35,061 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-10 03:34:35,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:34:35 BoogieIcfgContainer [2022-01-10 03:34:35,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:34:35,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:34:35,077 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:34:35,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:34:35,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:34:34" (1/3) ... [2022-01-10 03:34:35,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470db684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:34:35, skipping insertion in model container [2022-01-10 03:34:35,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:34" (2/3) ... [2022-01-10 03:34:35,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470db684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:34:35, skipping insertion in model container [2022-01-10 03:34:35,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:34:35" (3/3) ... [2022-01-10 03:34:35,081 INFO L111 eAbstractionObserver]: Analyzing ICFG relax-2.i [2022-01-10 03:34:35,085 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:34:35,085 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:34:35,129 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:34:35,136 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 03:34:35,137 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:34:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 44 states have internal predecessors, (67), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 03:34:35,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-10 03:34:35,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:35,153 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:34:35,154 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:35,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:35,158 INFO L85 PathProgramCache]: Analyzing trace with hash 229348008, now seen corresponding path program 1 times [2022-01-10 03:34:35,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:35,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537771372] [2022-01-10 03:34:35,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:35,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:35,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:35,179 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 03:34:35,216 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 03:34:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:35,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:34:35,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:34:35,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:34:35,348 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:35,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537771372] [2022-01-10 03:34:35,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537771372] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:34:35,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:34:35,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 03:34:35,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968138551] [2022-01-10 03:34:35,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:34:35,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 03:34:35,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:35,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 03:34:35,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:34:35,370 INFO L87 Difference]: Start difference. First operand has 51 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 44 states have internal predecessors, (67), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:35,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:35,412 INFO L93 Difference]: Finished difference Result 110 states and 172 transitions. [2022-01-10 03:34:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 03:34:35,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-10 03:34:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:35,419 INFO L225 Difference]: With dead ends: 110 [2022-01-10 03:34:35,419 INFO L226 Difference]: Without dead ends: 55 [2022-01-10 03:34:35,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:34:35,423 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 13 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:35,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 200 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:34:35,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-10 03:34:35,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-01-10 03:34:35,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 42 states have internal predecessors, (57), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:34:35,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2022-01-10 03:34:35,448 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 13 [2022-01-10 03:34:35,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:35,448 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2022-01-10 03:34:35,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:35,448 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2022-01-10 03:34:35,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 03:34:35,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:35,449 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:34:35,458 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 03:34:35,656 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 03:34:35,656 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:35,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:35,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1753731807, now seen corresponding path program 1 times [2022-01-10 03:34:35,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:35,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950708225] [2022-01-10 03:34:35,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:35,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:35,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:35,661 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 03:34:35,662 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 03:34:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:35,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 03:34:35,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:34:35,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:34:35,906 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:35,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950708225] [2022-01-10 03:34:35,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950708225] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:34:35,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:34:35,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 03:34:35,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072160431] [2022-01-10 03:34:35,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:34:35,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:34:35,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:35,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:34:35,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:34:35,908 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:36,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:36,027 INFO L93 Difference]: Finished difference Result 105 states and 141 transitions. [2022-01-10 03:34:36,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:34:36,028 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-10 03:34:36,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:36,028 INFO L225 Difference]: With dead ends: 105 [2022-01-10 03:34:36,029 INFO L226 Difference]: Without dead ends: 69 [2022-01-10 03:34:36,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 03:34:36,030 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 49 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:36,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 266 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:34:36,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-10 03:34:36,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2022-01-10 03:34:36,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 58 states have internal predecessors, (80), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:34:36,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2022-01-10 03:34:36,036 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 15 [2022-01-10 03:34:36,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:36,036 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2022-01-10 03:34:36,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:36,037 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2022-01-10 03:34:36,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 03:34:36,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:36,037 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:34:36,058 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 03:34:36,237 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 03:34:36,238 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:36,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:36,239 INFO L85 PathProgramCache]: Analyzing trace with hash 404200823, now seen corresponding path program 1 times [2022-01-10 03:34:36,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:36,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194054286] [2022-01-10 03:34:36,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:36,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:36,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:36,242 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 03:34:36,245 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 03:34:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:36,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 03:34:36,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:34:36,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:34:36,509 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:36,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194054286] [2022-01-10 03:34:36,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194054286] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:34:36,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:34:36,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 03:34:36,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539801522] [2022-01-10 03:34:36,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:34:36,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 03:34:36,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:36,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 03:34:36,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:34:36,510 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:36,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:36,653 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2022-01-10 03:34:36,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 03:34:36,654 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-10 03:34:36,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:36,655 INFO L225 Difference]: With dead ends: 96 [2022-01-10 03:34:36,655 INFO L226 Difference]: Without dead ends: 79 [2022-01-10 03:34:36,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-01-10 03:34:36,656 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 94 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:36,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 237 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:34:36,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-10 03:34:36,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2022-01-10 03:34:36,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 62 states have (on average 1.3870967741935485) internal successors, (86), 63 states have internal predecessors, (86), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:34:36,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 95 transitions. [2022-01-10 03:34:36,662 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 95 transitions. Word has length 16 [2022-01-10 03:34:36,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:36,662 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 95 transitions. [2022-01-10 03:34:36,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:36,662 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 95 transitions. [2022-01-10 03:34:36,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 03:34:36,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:36,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:34:36,672 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 03:34:36,863 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 03:34:36,864 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:36,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:36,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1831341089, now seen corresponding path program 1 times [2022-01-10 03:34:36,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:36,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393014024] [2022-01-10 03:34:36,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:36,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:36,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:36,870 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 03:34:36,874 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 03:34:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:36,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 03:34:37,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:34:37,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:34:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:34:37,791 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:37,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393014024] [2022-01-10 03:34:37,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393014024] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:34:37,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:34:37,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-10 03:34:37,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560052565] [2022-01-10 03:34:37,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:34:37,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 03:34:37,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:37,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 03:34:37,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-01-10 03:34:37,792 INFO L87 Difference]: Start difference. First operand 70 states and 95 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:38,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:38,172 INFO L93 Difference]: Finished difference Result 128 states and 172 transitions. [2022-01-10 03:34:38,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 03:34:38,172 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-10 03:34:38,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:38,173 INFO L225 Difference]: With dead ends: 128 [2022-01-10 03:34:38,173 INFO L226 Difference]: Without dead ends: 92 [2022-01-10 03:34:38,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-01-10 03:34:38,175 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 64 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:38,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 532 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 133 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-01-10 03:34:38,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-10 03:34:38,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2022-01-10 03:34:38,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 78 states have (on average 1.3974358974358974) internal successors, (109), 79 states have internal predecessors, (109), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:34:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 118 transitions. [2022-01-10 03:34:38,189 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 118 transitions. Word has length 17 [2022-01-10 03:34:38,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:38,189 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 118 transitions. [2022-01-10 03:34:38,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:38,190 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 118 transitions. [2022-01-10 03:34:38,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 03:34:38,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:38,191 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:34:38,201 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 03:34:38,399 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 03:34:38,400 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:38,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:38,400 INFO L85 PathProgramCache]: Analyzing trace with hash -251411362, now seen corresponding path program 1 times [2022-01-10 03:34:38,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:38,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769348609] [2022-01-10 03:34:38,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:38,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:38,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:38,401 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 03:34:38,403 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 03:34:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:38,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:34:38,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:34:38,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:34:38,474 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:38,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769348609] [2022-01-10 03:34:38,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769348609] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:34:38,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:34:38,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 03:34:38,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985215767] [2022-01-10 03:34:38,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:34:38,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 03:34:38,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:38,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 03:34:38,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:34:38,475 INFO L87 Difference]: Start difference. First operand 86 states and 118 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:38,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:38,498 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2022-01-10 03:34:38,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 03:34:38,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-10 03:34:38,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:38,500 INFO L225 Difference]: With dead ends: 108 [2022-01-10 03:34:38,500 INFO L226 Difference]: Without dead ends: 82 [2022-01-10 03:34:38,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:34:38,501 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 16 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:38,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 160 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:34:38,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-10 03:34:38,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-01-10 03:34:38,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 74 states have (on average 1.364864864864865) internal successors, (101), 75 states have internal predecessors, (101), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:34:38,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 110 transitions. [2022-01-10 03:34:38,512 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 110 transitions. Word has length 18 [2022-01-10 03:34:38,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:38,512 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 110 transitions. [2022-01-10 03:34:38,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:38,512 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 110 transitions. [2022-01-10 03:34:38,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 03:34:38,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:38,513 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:34:38,533 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 03:34:38,733 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 03:34:38,734 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:38,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:38,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1678412103, now seen corresponding path program 1 times [2022-01-10 03:34:38,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:38,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046960246] [2022-01-10 03:34:38,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:38,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:38,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:38,736 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 03:34:38,737 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 03:34:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:38,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 03:34:38,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:34:38,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:34:38,851 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:38,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046960246] [2022-01-10 03:34:38,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046960246] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:34:38,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:34:38,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 03:34:38,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090721498] [2022-01-10 03:34:38,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:34:38,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:34:38,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:38,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:34:38,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:34:38,852 INFO L87 Difference]: Start difference. First operand 82 states and 110 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:38,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:38,928 INFO L93 Difference]: Finished difference Result 91 states and 119 transitions. [2022-01-10 03:34:38,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 03:34:38,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-10 03:34:38,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:38,929 INFO L225 Difference]: With dead ends: 91 [2022-01-10 03:34:38,929 INFO L226 Difference]: Without dead ends: 66 [2022-01-10 03:34:38,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:34:38,930 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 14 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:38,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 223 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:34:38,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-10 03:34:38,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-01-10 03:34:38,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 59 states have internal predecessors, (79), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:34:38,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 88 transitions. [2022-01-10 03:34:38,935 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 88 transitions. Word has length 18 [2022-01-10 03:34:38,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:38,935 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 88 transitions. [2022-01-10 03:34:38,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:38,935 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 88 transitions. [2022-01-10 03:34:38,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 03:34:38,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:38,936 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:34:38,950 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 03:34:39,143 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 03:34:39,143 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:39,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:39,144 INFO L85 PathProgramCache]: Analyzing trace with hash -2003533961, now seen corresponding path program 1 times [2022-01-10 03:34:39,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:39,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816048110] [2022-01-10 03:34:39,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:39,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:39,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:39,146 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 03:34:39,149 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 03:34:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:39,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 03:34:39,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:34:39,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:34:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:34:39,781 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:39,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816048110] [2022-01-10 03:34:39,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816048110] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:34:39,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:34:39,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-10 03:34:39,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311567178] [2022-01-10 03:34:39,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:34:39,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 03:34:39,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:39,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 03:34:39,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:34:39,782 INFO L87 Difference]: Start difference. First operand 66 states and 88 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:40,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:40,158 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2022-01-10 03:34:40,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 03:34:40,159 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-10 03:34:40,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:40,159 INFO L225 Difference]: With dead ends: 90 [2022-01-10 03:34:40,160 INFO L226 Difference]: Without dead ends: 73 [2022-01-10 03:34:40,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-01-10 03:34:40,160 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 84 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:40,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 368 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 0 Unknown, 31 Unchecked, 0.3s Time] [2022-01-10 03:34:40,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-10 03:34:40,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2022-01-10 03:34:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.309090909090909) internal successors, (72), 56 states have internal predecessors, (72), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:34:40,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2022-01-10 03:34:40,165 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 18 [2022-01-10 03:34:40,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:40,166 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2022-01-10 03:34:40,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:40,166 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2022-01-10 03:34:40,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 03:34:40,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:40,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:34:40,175 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 03:34:40,373 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 03:34:40,373 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:40,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:40,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1044525789, now seen corresponding path program 1 times [2022-01-10 03:34:40,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:40,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003414244] [2022-01-10 03:34:40,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:40,374 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:40,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:40,375 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 03:34:40,378 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 03:34:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:40,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 03:34:40,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:34:40,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:34:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 03:34:40,950 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:40,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003414244] [2022-01-10 03:34:40,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003414244] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:34:40,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:34:40,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2022-01-10 03:34:40,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409535254] [2022-01-10 03:34:40,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:34:40,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 03:34:40,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:40,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 03:34:40,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-01-10 03:34:40,951 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:41,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:41,202 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2022-01-10 03:34:41,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 03:34:41,204 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-10 03:34:41,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:41,204 INFO L225 Difference]: With dead ends: 94 [2022-01-10 03:34:41,204 INFO L226 Difference]: Without dead ends: 92 [2022-01-10 03:34:41,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-10 03:34:41,205 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 126 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:41,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 188 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 03:34:41,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-10 03:34:41,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2022-01-10 03:34:41,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 64 states have internal predecessors, (81), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 03:34:41,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2022-01-10 03:34:41,212 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 19 [2022-01-10 03:34:41,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:41,212 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2022-01-10 03:34:41,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:41,212 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2022-01-10 03:34:41,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 03:34:41,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:41,213 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:34:41,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 03:34:41,423 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 03:34:41,424 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:41,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:41,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1225946208, now seen corresponding path program 1 times [2022-01-10 03:34:41,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:41,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493910371] [2022-01-10 03:34:41,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:41,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:41,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:41,425 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 03:34:41,427 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 03:34:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:41,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 03:34:41,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:34:41,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:34:41,503 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:41,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493910371] [2022-01-10 03:34:41,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493910371] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:34:41,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:34:41,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:34:41,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108029618] [2022-01-10 03:34:41,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:34:41,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 03:34:41,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:41,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 03:34:41,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:34:41,505 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:41,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:41,538 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2022-01-10 03:34:41,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 03:34:41,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-10 03:34:41,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:41,540 INFO L225 Difference]: With dead ends: 108 [2022-01-10 03:34:41,540 INFO L226 Difference]: Without dead ends: 85 [2022-01-10 03:34:41,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:34:41,540 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 22 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:41,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 123 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:34:41,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-10 03:34:41,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 68. [2022-01-10 03:34:41,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 60 states have internal predecessors, (77), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 03:34:41,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2022-01-10 03:34:41,546 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 20 [2022-01-10 03:34:41,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:41,546 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2022-01-10 03:34:41,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:41,546 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2022-01-10 03:34:41,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 03:34:41,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:41,547 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:34:41,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 03:34:41,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:41,754 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:41,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:41,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1248993337, now seen corresponding path program 1 times [2022-01-10 03:34:41,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:41,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999012056] [2022-01-10 03:34:41,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:41,755 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:41,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:41,756 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:41,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 03:34:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:41,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 03:34:41,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:34:41,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:34:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:34:42,689 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:42,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999012056] [2022-01-10 03:34:42,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999012056] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:34:42,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:34:42,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-10 03:34:42,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749910805] [2022-01-10 03:34:42,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:34:42,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 03:34:42,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:42,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 03:34:42,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-01-10 03:34:42,690 INFO L87 Difference]: Start difference. First operand 68 states and 88 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:43,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:43,740 INFO L93 Difference]: Finished difference Result 180 states and 248 transitions. [2022-01-10 03:34:43,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 03:34:43,741 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-10 03:34:43,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:43,742 INFO L225 Difference]: With dead ends: 180 [2022-01-10 03:34:43,742 INFO L226 Difference]: Without dead ends: 166 [2022-01-10 03:34:43,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2022-01-10 03:34:43,743 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 354 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:43,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 514 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 146 Invalid, 0 Unknown, 108 Unchecked, 0.3s Time] [2022-01-10 03:34:43,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-01-10 03:34:43,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 74. [2022-01-10 03:34:43,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 64 states have (on average 1.328125) internal successors, (85), 66 states have internal predecessors, (85), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 03:34:43,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2022-01-10 03:34:43,756 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 20 [2022-01-10 03:34:43,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:43,756 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 96 transitions. [2022-01-10 03:34:43,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:43,757 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 96 transitions. [2022-01-10 03:34:43,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 03:34:43,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:43,757 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:34:43,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 03:34:43,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:43,968 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:43,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:43,969 INFO L85 PathProgramCache]: Analyzing trace with hash 925718521, now seen corresponding path program 2 times [2022-01-10 03:34:43,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:43,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914194510] [2022-01-10 03:34:43,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:34:43,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:43,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:43,970 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:43,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 03:34:44,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 03:34:44,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:34:44,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 03:34:44,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:34:44,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:34:44,142 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:44,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914194510] [2022-01-10 03:34:44,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914194510] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:34:44,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:34:44,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 03:34:44,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311457038] [2022-01-10 03:34:44,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:34:44,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:34:44,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:44,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:34:44,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:34:44,143 INFO L87 Difference]: Start difference. First operand 74 states and 96 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:44,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:44,428 INFO L93 Difference]: Finished difference Result 135 states and 177 transitions. [2022-01-10 03:34:44,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:34:44,429 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-10 03:34:44,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:44,430 INFO L225 Difference]: With dead ends: 135 [2022-01-10 03:34:44,430 INFO L226 Difference]: Without dead ends: 76 [2022-01-10 03:34:44,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-01-10 03:34:44,434 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 28 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:44,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 276 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 03:34:44,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-10 03:34:44,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-01-10 03:34:44,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 65 states have (on average 1.323076923076923) internal successors, (86), 67 states have internal predecessors, (86), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 03:34:44,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2022-01-10 03:34:44,449 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 20 [2022-01-10 03:34:44,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:44,450 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2022-01-10 03:34:44,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:44,450 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2022-01-10 03:34:44,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 03:34:44,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:44,452 INFO L514 BasicCegarLoop]: trace histogram [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 03:34:44,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 03:34:44,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:44,661 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:44,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:44,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1019430450, now seen corresponding path program 1 times [2022-01-10 03:34:44,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:44,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143024199] [2022-01-10 03:34:44,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:44,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:44,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:44,663 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:44,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 03:34:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:44,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 03:34:44,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:34:44,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:34:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:34:45,679 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:45,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143024199] [2022-01-10 03:34:45,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2143024199] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:34:45,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:34:45,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-01-10 03:34:45,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820980723] [2022-01-10 03:34:45,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:34:45,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 03:34:45,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:45,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 03:34:45,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-01-10 03:34:45,680 INFO L87 Difference]: Start difference. First operand 75 states and 97 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:46,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:46,620 INFO L93 Difference]: Finished difference Result 163 states and 213 transitions. [2022-01-10 03:34:46,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 03:34:46,621 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-10 03:34:46,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:46,622 INFO L225 Difference]: With dead ends: 163 [2022-01-10 03:34:46,622 INFO L226 Difference]: Without dead ends: 161 [2022-01-10 03:34:46,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2022-01-10 03:34:46,622 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 283 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:46,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 550 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 158 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-01-10 03:34:46,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-10 03:34:46,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 84. [2022-01-10 03:34:46,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 74 states have (on average 1.364864864864865) internal successors, (101), 76 states have internal predecessors, (101), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 03:34:46,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 112 transitions. [2022-01-10 03:34:46,629 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 112 transitions. Word has length 22 [2022-01-10 03:34:46,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:46,629 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 112 transitions. [2022-01-10 03:34:46,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:46,629 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 112 transitions. [2022-01-10 03:34:46,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 03:34:46,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:46,630 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:34:46,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-01-10 03:34:46,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:46,845 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:46,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:46,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1237917637, now seen corresponding path program 2 times [2022-01-10 03:34:46,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:46,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690662694] [2022-01-10 03:34:46,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:34:46,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:46,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:46,847 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:46,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 03:34:46,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 03:34:46,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:34:46,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 03:34:46,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:34:47,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:34:47,019 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:47,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690662694] [2022-01-10 03:34:47,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690662694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:34:47,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:34:47,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 03:34:47,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253857567] [2022-01-10 03:34:47,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:34:47,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 03:34:47,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:47,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 03:34:47,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:34:47,020 INFO L87 Difference]: Start difference. First operand 84 states and 112 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:47,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:47,150 INFO L93 Difference]: Finished difference Result 98 states and 128 transitions. [2022-01-10 03:34:47,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 03:34:47,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-10 03:34:47,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:47,151 INFO L225 Difference]: With dead ends: 98 [2022-01-10 03:34:47,151 INFO L226 Difference]: Without dead ends: 84 [2022-01-10 03:34:47,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:34:47,152 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 38 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:47,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 108 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:34:47,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-10 03:34:47,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-01-10 03:34:47,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 74 states have (on average 1.3513513513513513) internal successors, (100), 76 states have internal predecessors, (100), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 03:34:47,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 111 transitions. [2022-01-10 03:34:47,158 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 111 transitions. Word has length 22 [2022-01-10 03:34:47,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:47,158 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 111 transitions. [2022-01-10 03:34:47,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:47,159 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 111 transitions. [2022-01-10 03:34:47,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 03:34:47,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:47,159 INFO L514 BasicCegarLoop]: trace histogram [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 03:34:47,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 03:34:47,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:47,366 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:47,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:47,366 INFO L85 PathProgramCache]: Analyzing trace with hash -900198988, now seen corresponding path program 2 times [2022-01-10 03:34:47,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:47,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844218815] [2022-01-10 03:34:47,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:34:47,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:47,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:47,367 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:47,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 03:34:47,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 03:34:47,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:34:47,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 03:34:47,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 03:34:47,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:34:47,561 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:47,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844218815] [2022-01-10 03:34:47,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844218815] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:34:47,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:34:47,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 03:34:47,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843595162] [2022-01-10 03:34:47,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:34:47,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:34:47,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:47,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:34:47,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:34:47,563 INFO L87 Difference]: Start difference. First operand 84 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:47,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:47,755 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2022-01-10 03:34:47,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:34:47,756 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-10 03:34:47,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:47,757 INFO L225 Difference]: With dead ends: 90 [2022-01-10 03:34:47,757 INFO L226 Difference]: Without dead ends: 88 [2022-01-10 03:34:47,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 03:34:47,757 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 69 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:47,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 168 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 03:34:47,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-10 03:34:47,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 60. [2022-01-10 03:34:47,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 52 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:34:47,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2022-01-10 03:34:47,763 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 24 [2022-01-10 03:34:47,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:47,763 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2022-01-10 03:34:47,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:47,763 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2022-01-10 03:34:47,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 03:34:47,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:47,763 INFO L514 BasicCegarLoop]: trace histogram [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 03:34:47,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 03:34:47,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:47,970 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:47,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:47,970 INFO L85 PathProgramCache]: Analyzing trace with hash -458147624, now seen corresponding path program 1 times [2022-01-10 03:34:47,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:47,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259798793] [2022-01-10 03:34:47,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:47,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:47,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:47,972 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:47,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 03:34:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:48,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 03:34:48,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:34:48,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:34:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:34:48,865 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:48,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259798793] [2022-01-10 03:34:48,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259798793] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:34:48,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:34:48,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-10 03:34:48,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861824533] [2022-01-10 03:34:48,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:34:48,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 03:34:48,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:48,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 03:34:48,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:34:48,866 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:49,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:49,083 INFO L93 Difference]: Finished difference Result 115 states and 150 transitions. [2022-01-10 03:34:49,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 03:34:49,084 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-10 03:34:49,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:49,084 INFO L225 Difference]: With dead ends: 115 [2022-01-10 03:34:49,084 INFO L226 Difference]: Without dead ends: 101 [2022-01-10 03:34:49,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-01-10 03:34:49,085 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 96 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:49,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 482 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2022-01-10 03:34:49,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-10 03:34:49,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 76. [2022-01-10 03:34:49,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 67 states have (on average 1.3432835820895523) internal successors, (90), 68 states have internal predecessors, (90), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:34:49,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 99 transitions. [2022-01-10 03:34:49,091 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 99 transitions. Word has length 26 [2022-01-10 03:34:49,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:49,091 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 99 transitions. [2022-01-10 03:34:49,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:49,091 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 99 transitions. [2022-01-10 03:34:49,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 03:34:49,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:49,092 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:34:49,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-01-10 03:34:49,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:49,292 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:49,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:49,293 INFO L85 PathProgramCache]: Analyzing trace with hash -995297303, now seen corresponding path program 1 times [2022-01-10 03:34:49,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:49,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185347996] [2022-01-10 03:34:49,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:49,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:49,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:49,294 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:49,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 03:34:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:49,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 03:34:49,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:34:49,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:34:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:34:49,685 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:49,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185347996] [2022-01-10 03:34:49,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185347996] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:34:49,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:34:49,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-10 03:34:49,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564948097] [2022-01-10 03:34:49,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:34:49,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 03:34:49,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:49,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 03:34:49,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:34:49,687 INFO L87 Difference]: Start difference. First operand 76 states and 99 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:49,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:49,925 INFO L93 Difference]: Finished difference Result 160 states and 211 transitions. [2022-01-10 03:34:49,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 03:34:49,925 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-10 03:34:49,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:49,926 INFO L225 Difference]: With dead ends: 160 [2022-01-10 03:34:49,926 INFO L226 Difference]: Without dead ends: 112 [2022-01-10 03:34:49,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-01-10 03:34:49,927 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 271 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:49,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 511 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 03:34:49,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-10 03:34:49,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 73. [2022-01-10 03:34:49,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 64 states have (on average 1.3125) internal successors, (84), 65 states have internal predecessors, (84), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:34:49,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2022-01-10 03:34:49,933 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 27 [2022-01-10 03:34:49,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:49,933 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2022-01-10 03:34:49,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:49,933 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2022-01-10 03:34:49,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 03:34:49,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:49,933 INFO L514 BasicCegarLoop]: trace histogram [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 03:34:49,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 03:34:50,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:50,141 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:50,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:50,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2085458086, now seen corresponding path program 2 times [2022-01-10 03:34:50,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:50,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632668592] [2022-01-10 03:34:50,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:34:50,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:50,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:50,143 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:50,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 03:34:50,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:34:50,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:34:50,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 03:34:50,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:50,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:34:50,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:34:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:34:50,944 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:50,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632668592] [2022-01-10 03:34:50,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632668592] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:34:50,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:34:50,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2022-01-10 03:34:50,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992448545] [2022-01-10 03:34:50,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:34:50,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:34:50,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:50,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:34:50,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-01-10 03:34:50,945 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:51,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:51,064 INFO L93 Difference]: Finished difference Result 95 states and 122 transitions. [2022-01-10 03:34:51,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 03:34:51,064 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-10 03:34:51,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:51,065 INFO L225 Difference]: With dead ends: 95 [2022-01-10 03:34:51,065 INFO L226 Difference]: Without dead ends: 88 [2022-01-10 03:34:51,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-01-10 03:34:51,066 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 55 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:51,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 178 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:34:51,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-10 03:34:51,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2022-01-10 03:34:51,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 67 states have internal predecessors, (87), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:34:51,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2022-01-10 03:34:51,072 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 28 [2022-01-10 03:34:51,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:51,072 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2022-01-10 03:34:51,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:51,072 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2022-01-10 03:34:51,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 03:34:51,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:51,073 INFO L514 BasicCegarLoop]: trace histogram [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 03:34:51,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 03:34:51,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:51,280 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:51,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:51,280 INFO L85 PathProgramCache]: Analyzing trace with hash -2083611044, now seen corresponding path program 1 times [2022-01-10 03:34:51,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:51,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390244563] [2022-01-10 03:34:51,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:51,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:51,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:51,281 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:51,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 03:34:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:51,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 03:34:51,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:34:51,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:34:52,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:34:52,045 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:52,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390244563] [2022-01-10 03:34:52,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390244563] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:34:52,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:34:52,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 18 [2022-01-10 03:34:52,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871526986] [2022-01-10 03:34:52,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:34:52,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:34:52,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:52,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:34:52,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-10 03:34:52,046 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:52,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:52,282 INFO L93 Difference]: Finished difference Result 90 states and 111 transitions. [2022-01-10 03:34:52,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:34:52,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-10 03:34:52,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:52,283 INFO L225 Difference]: With dead ends: 90 [2022-01-10 03:34:52,283 INFO L226 Difference]: Without dead ends: 82 [2022-01-10 03:34:52,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-01-10 03:34:52,284 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 94 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:52,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 115 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 03:34:52,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-10 03:34:52,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2022-01-10 03:34:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 70 states have (on average 1.3) internal successors, (91), 71 states have internal predecessors, (91), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:34:52,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2022-01-10 03:34:52,294 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 28 [2022-01-10 03:34:52,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:52,294 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2022-01-10 03:34:52,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:52,295 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2022-01-10 03:34:52,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 03:34:52,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:52,296 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 03:34:52,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 03:34:52,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:52,505 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:52,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:52,506 INFO L85 PathProgramCache]: Analyzing trace with hash 99532969, now seen corresponding path program 1 times [2022-01-10 03:34:52,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:52,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584067246] [2022-01-10 03:34:52,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:52,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:52,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:52,507 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:52,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 03:34:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:52,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 03:34:52,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:34:52,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:34:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:34:52,993 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:52,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584067246] [2022-01-10 03:34:52,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584067246] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:34:52,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:34:52,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-10 03:34:52,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888584438] [2022-01-10 03:34:52,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:34:52,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 03:34:52,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:52,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 03:34:52,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:34:52,995 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:53,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:53,400 INFO L93 Difference]: Finished difference Result 202 states and 266 transitions. [2022-01-10 03:34:53,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 03:34:53,401 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-10 03:34:53,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:53,402 INFO L225 Difference]: With dead ends: 202 [2022-01-10 03:34:53,402 INFO L226 Difference]: Without dead ends: 147 [2022-01-10 03:34:53,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-01-10 03:34:53,403 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 284 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:53,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 461 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 03:34:53,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-10 03:34:53,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 88. [2022-01-10 03:34:53,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 80 states have internal predecessors, (103), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:34:53,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 112 transitions. [2022-01-10 03:34:53,412 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 112 transitions. Word has length 29 [2022-01-10 03:34:53,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:53,412 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 112 transitions. [2022-01-10 03:34:53,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:53,412 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 112 transitions. [2022-01-10 03:34:53,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 03:34:53,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:53,413 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2022-01-10 03:34:53,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 03:34:53,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:53,617 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:53,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:53,618 INFO L85 PathProgramCache]: Analyzing trace with hash 2062313625, now seen corresponding path program 1 times [2022-01-10 03:34:53,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:53,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583586848] [2022-01-10 03:34:53,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:53,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:53,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:53,619 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:53,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 03:34:53,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:53,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 03:34:53,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 03:34:53,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:34:53,738 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:53,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1583586848] [2022-01-10 03:34:53,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1583586848] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:34:53,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:34:53,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:34:53,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988382031] [2022-01-10 03:34:53,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:34:53,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 03:34:53,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:53,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 03:34:53,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:34:53,739 INFO L87 Difference]: Start difference. First operand 88 states and 112 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 03:34:53,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:53,789 INFO L93 Difference]: Finished difference Result 118 states and 151 transitions. [2022-01-10 03:34:53,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 03:34:53,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-10 03:34:53,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:53,790 INFO L225 Difference]: With dead ends: 118 [2022-01-10 03:34:53,790 INFO L226 Difference]: Without dead ends: 97 [2022-01-10 03:34:53,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:34:53,791 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 5 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:53,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 111 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:34:53,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-10 03:34:53,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2022-01-10 03:34:53,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 84 states have internal predecessors, (109), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:34:53,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 118 transitions. [2022-01-10 03:34:53,798 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 118 transitions. Word has length 31 [2022-01-10 03:34:53,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:53,798 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 118 transitions. [2022-01-10 03:34:53,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 03:34:53,798 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 118 transitions. [2022-01-10 03:34:53,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 03:34:53,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:53,799 INFO L514 BasicCegarLoop]: trace histogram [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 03:34:53,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-01-10 03:34:54,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:54,006 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:54,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:54,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1241240931, now seen corresponding path program 1 times [2022-01-10 03:34:54,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:54,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81921994] [2022-01-10 03:34:54,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:54,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:54,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:54,008 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:54,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 03:34:54,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:54,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:34:54,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:54,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 03:34:54,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:34:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 03:34:54,247 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:54,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81921994] [2022-01-10 03:34:54,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81921994] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:34:54,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:34:54,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 03:34:54,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571192810] [2022-01-10 03:34:54,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:34:54,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 03:34:54,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:54,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 03:34:54,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:34:54,249 INFO L87 Difference]: Start difference. First operand 92 states and 118 transitions. Second operand has 12 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:54,499 INFO L93 Difference]: Finished difference Result 128 states and 171 transitions. [2022-01-10 03:34:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 03:34:54,500 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-10 03:34:54,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:54,501 INFO L225 Difference]: With dead ends: 128 [2022-01-10 03:34:54,501 INFO L226 Difference]: Without dead ends: 115 [2022-01-10 03:34:54,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-10 03:34:54,502 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 59 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:54,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 536 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 03:34:54,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-10 03:34:54,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2022-01-10 03:34:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 102 states have (on average 1.3431372549019607) internal successors, (137), 103 states have internal predecessors, (137), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:34:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 146 transitions. [2022-01-10 03:34:54,524 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 146 transitions. Word has length 31 [2022-01-10 03:34:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:54,524 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 146 transitions. [2022-01-10 03:34:54,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 146 transitions. [2022-01-10 03:34:54,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 03:34:54,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:54,525 INFO L514 BasicCegarLoop]: trace histogram [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 03:34:54,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-01-10 03:34:54,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:54,727 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:54,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:54,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1243087973, now seen corresponding path program 1 times [2022-01-10 03:34:54,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:54,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210691785] [2022-01-10 03:34:54,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:54,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:54,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:54,729 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:54,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 03:34:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:54,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 03:34:54,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 03:34:55,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:34:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 03:34:55,320 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:55,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210691785] [2022-01-10 03:34:55,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210691785] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:34:55,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:34:55,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 14 [2022-01-10 03:34:55,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199874163] [2022-01-10 03:34:55,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:34:55,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 03:34:55,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:55,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 03:34:55,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:34:55,322 INFO L87 Difference]: Start difference. First operand 111 states and 146 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:55,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:55,456 INFO L93 Difference]: Finished difference Result 159 states and 213 transitions. [2022-01-10 03:34:55,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 03:34:55,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-10 03:34:55,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:55,459 INFO L225 Difference]: With dead ends: 159 [2022-01-10 03:34:55,459 INFO L226 Difference]: Without dead ends: 151 [2022-01-10 03:34:55,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:34:55,459 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 64 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:55,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 94 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:34:55,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-10 03:34:55,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 129. [2022-01-10 03:34:55,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 120 states have (on average 1.3583333333333334) internal successors, (163), 121 states have internal predecessors, (163), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:34:55,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 172 transitions. [2022-01-10 03:34:55,470 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 172 transitions. Word has length 31 [2022-01-10 03:34:55,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:55,470 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 172 transitions. [2022-01-10 03:34:55,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:55,471 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 172 transitions. [2022-01-10 03:34:55,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 03:34:55,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:55,471 INFO L514 BasicCegarLoop]: trace histogram [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 03:34:55,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 03:34:55,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:55,679 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:55,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:55,679 INFO L85 PathProgramCache]: Analyzing trace with hash 431894305, now seen corresponding path program 1 times [2022-01-10 03:34:55,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:55,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812222259] [2022-01-10 03:34:55,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:55,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:55,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:55,681 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:55,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 03:34:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:55,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 03:34:55,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:56,141 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-01-10 03:34:56,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 20 [2022-01-10 03:34:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:34:56,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:34:56,535 INFO L353 Elim1Store]: treesize reduction 25, result has 81.6 percent of original size [2022-01-10 03:34:56,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 118 [2022-01-10 03:34:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:34:57,340 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:57,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812222259] [2022-01-10 03:34:57,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812222259] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:34:57,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:34:57,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-01-10 03:34:57,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083299522] [2022-01-10 03:34:57,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:34:57,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 03:34:57,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:57,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 03:34:57,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:34:57,341 INFO L87 Difference]: Start difference. First operand 129 states and 172 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:58,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:58,509 INFO L93 Difference]: Finished difference Result 282 states and 389 transitions. [2022-01-10 03:34:58,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 03:34:58,510 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-10 03:34:58,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:58,511 INFO L225 Difference]: With dead ends: 282 [2022-01-10 03:34:58,511 INFO L226 Difference]: Without dead ends: 233 [2022-01-10 03:34:58,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2022-01-10 03:34:58,515 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 141 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:58,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 560 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 03:34:58,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-01-10 03:34:58,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 147. [2022-01-10 03:34:58,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 138 states have (on average 1.3623188405797102) internal successors, (188), 139 states have internal predecessors, (188), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:34:58,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 197 transitions. [2022-01-10 03:34:58,530 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 197 transitions. Word has length 31 [2022-01-10 03:34:58,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:58,531 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 197 transitions. [2022-01-10 03:34:58,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:58,531 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 197 transitions. [2022-01-10 03:34:58,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 03:34:58,531 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:58,531 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 03:34:58,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 03:34:58,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:58,739 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:58,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:58,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1611489959, now seen corresponding path program 2 times [2022-01-10 03:34:58,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:58,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075610023] [2022-01-10 03:34:58,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:34:58,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:58,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:58,741 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:58,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 03:34:58,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 03:34:58,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:34:58,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 03:34:58,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 03:34:58,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:34:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 03:34:59,146 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:59,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075610023] [2022-01-10 03:34:59,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075610023] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:34:59,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:34:59,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-01-10 03:34:59,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129317371] [2022-01-10 03:34:59,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:34:59,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:34:59,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:59,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:34:59,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-10 03:34:59,147 INFO L87 Difference]: Start difference. First operand 147 states and 197 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:59,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:59,239 INFO L93 Difference]: Finished difference Result 174 states and 231 transitions. [2022-01-10 03:34:59,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:34:59,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-10 03:34:59,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:59,240 INFO L225 Difference]: With dead ends: 174 [2022-01-10 03:34:59,241 INFO L226 Difference]: Without dead ends: 166 [2022-01-10 03:34:59,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-10 03:34:59,241 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 50 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:59,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 138 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-01-10 03:34:59,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-01-10 03:34:59,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 147. [2022-01-10 03:34:59,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 138 states have (on average 1.3478260869565217) internal successors, (186), 139 states have internal predecessors, (186), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:34:59,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 195 transitions. [2022-01-10 03:34:59,256 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 195 transitions. Word has length 31 [2022-01-10 03:34:59,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:59,256 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 195 transitions. [2022-01-10 03:34:59,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:34:59,256 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 195 transitions. [2022-01-10 03:34:59,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 03:34:59,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:59,256 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 03:34:59,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 03:34:59,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:59,457 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:59,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:59,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1985271866, now seen corresponding path program 1 times [2022-01-10 03:34:59,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:59,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662808121] [2022-01-10 03:34:59,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:59,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:59,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:59,459 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:59,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 03:34:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:59,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 03:34:59,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:35:00,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 03:35:00,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:35:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 03:35:00,727 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:35:00,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662808121] [2022-01-10 03:35:00,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662808121] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:35:00,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:35:00,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2022-01-10 03:35:00,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132657109] [2022-01-10 03:35:00,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:35:00,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-10 03:35:00,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:35:00,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-10 03:35:00,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2022-01-10 03:35:00,729 INFO L87 Difference]: Start difference. First operand 147 states and 195 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:35:02,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:35:02,582 INFO L93 Difference]: Finished difference Result 572 states and 788 transitions. [2022-01-10 03:35:02,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-10 03:35:02,583 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-10 03:35:02,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:35:02,612 INFO L225 Difference]: With dead ends: 572 [2022-01-10 03:35:02,612 INFO L226 Difference]: Without dead ends: 471 [2022-01-10 03:35:02,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=616, Invalid=1934, Unknown=0, NotChecked=0, Total=2550 [2022-01-10 03:35:02,614 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 970 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 03:35:02,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [974 Valid, 1585 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 03:35:02,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-01-10 03:35:02,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 221. [2022-01-10 03:35:02,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 211 states have (on average 1.3507109004739337) internal successors, (285), 212 states have internal predecessors, (285), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 03:35:02,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 296 transitions. [2022-01-10 03:35:02,653 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 296 transitions. Word has length 34 [2022-01-10 03:35:02,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:35:02,653 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 296 transitions. [2022-01-10 03:35:02,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:35:02,653 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 296 transitions. [2022-01-10 03:35:02,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 03:35:02,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:35:02,654 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2022-01-10 03:35:02,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 03:35:02,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:35:02,863 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:35:02,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:35:02,863 INFO L85 PathProgramCache]: Analyzing trace with hash -483724996, now seen corresponding path program 1 times [2022-01-10 03:35:02,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:35:02,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864357253] [2022-01-10 03:35:02,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:35:02,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:35:02,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:35:02,865 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:35:02,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 03:35:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:35:02,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 03:35:02,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:35:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 03:35:03,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:35:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 03:35:03,199 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:35:03,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864357253] [2022-01-10 03:35:03,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864357253] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:35:03,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:35:03,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2022-01-10 03:35:03,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704247617] [2022-01-10 03:35:03,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:35:03,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 03:35:03,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:35:03,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 03:35:03,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-10 03:35:03,200 INFO L87 Difference]: Start difference. First operand 221 states and 296 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 03:35:03,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:35:03,386 INFO L93 Difference]: Finished difference Result 262 states and 350 transitions. [2022-01-10 03:35:03,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 03:35:03,386 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-10 03:35:03,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:35:03,387 INFO L225 Difference]: With dead ends: 262 [2022-01-10 03:35:03,387 INFO L226 Difference]: Without dead ends: 241 [2022-01-10 03:35:03,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-01-10 03:35:03,388 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 29 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:35:03,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 270 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-01-10 03:35:03,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-01-10 03:35:03,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 234. [2022-01-10 03:35:03,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 222 states have (on average 1.3468468468468469) internal successors, (299), 223 states have internal predecessors, (299), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-10 03:35:03,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 314 transitions. [2022-01-10 03:35:03,413 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 314 transitions. Word has length 36 [2022-01-10 03:35:03,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:35:03,413 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 314 transitions. [2022-01-10 03:35:03,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 03:35:03,413 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 314 transitions. [2022-01-10 03:35:03,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 03:35:03,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:35:03,414 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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] [2022-01-10 03:35:03,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 03:35:03,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:35:03,621 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:35:03,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:35:03,621 INFO L85 PathProgramCache]: Analyzing trace with hash -337481851, now seen corresponding path program 1 times [2022-01-10 03:35:03,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:35:03,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985461] [2022-01-10 03:35:03,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:35:03,622 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:35:03,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:35:03,623 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:35:03,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 03:35:03,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:35:03,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-10 03:35:03,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:35:04,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 03:35:04,485 INFO L353 Elim1Store]: treesize reduction 25, result has 45.7 percent of original size [2022-01-10 03:35:04,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 31 [2022-01-10 03:35:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:35:04,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:35:05,579 INFO L353 Elim1Store]: treesize reduction 26, result has 81.3 percent of original size [2022-01-10 03:35:05,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 120 [2022-01-10 03:35:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 03:35:08,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:35:08,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985461] [2022-01-10 03:35:08,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985461] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:35:08,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:35:08,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2022-01-10 03:35:08,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534395237] [2022-01-10 03:35:08,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:35:08,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 03:35:08,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:35:08,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 03:35:08,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-10 03:35:08,279 INFO L87 Difference]: Start difference. First operand 234 states and 314 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:35:10,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:35:10,796 INFO L93 Difference]: Finished difference Result 540 states and 725 transitions. [2022-01-10 03:35:10,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 03:35:10,797 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-10 03:35:10,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:35:10,798 INFO L225 Difference]: With dead ends: 540 [2022-01-10 03:35:10,798 INFO L226 Difference]: Without dead ends: 403 [2022-01-10 03:35:10,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2022-01-10 03:35:10,799 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 195 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:35:10,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 832 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-10 03:35:10,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-01-10 03:35:10,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 258. [2022-01-10 03:35:10,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 246 states have (on average 1.329268292682927) internal successors, (327), 247 states have internal predecessors, (327), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-10 03:35:10,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 342 transitions. [2022-01-10 03:35:10,828 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 342 transitions. Word has length 37 [2022-01-10 03:35:10,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:35:10,828 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 342 transitions. [2022-01-10 03:35:10,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:35:10,828 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 342 transitions. [2022-01-10 03:35:10,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 03:35:10,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:35:10,829 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:35:10,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 03:35:11,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:35:11,037 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:35:11,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:35:11,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1795729298, now seen corresponding path program 1 times [2022-01-10 03:35:11,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:35:11,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546152762] [2022-01-10 03:35:11,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:35:11,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:35:11,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:35:11,040 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:35:11,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 03:35:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:35:11,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 03:35:11,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:35:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:35:11,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:35:11,321 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:35:11,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546152762] [2022-01-10 03:35:11,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546152762] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:35:11,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:35:11,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 03:35:11,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236244191] [2022-01-10 03:35:11,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:35:11,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:35:11,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:35:11,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:35:11,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:35:11,322 INFO L87 Difference]: Start difference. First operand 258 states and 342 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:35:11,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:35:11,366 INFO L93 Difference]: Finished difference Result 283 states and 373 transitions. [2022-01-10 03:35:11,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 03:35:11,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-01-10 03:35:11,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:35:11,367 INFO L225 Difference]: With dead ends: 283 [2022-01-10 03:35:11,368 INFO L226 Difference]: Without dead ends: 262 [2022-01-10 03:35:11,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:35:11,368 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 9 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:35:11,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 180 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2022-01-10 03:35:11,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-10 03:35:11,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2022-01-10 03:35:11,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 250 states have (on average 1.328) internal successors, (332), 251 states have internal predecessors, (332), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-10 03:35:11,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 347 transitions. [2022-01-10 03:35:11,396 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 347 transitions. Word has length 41 [2022-01-10 03:35:11,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:35:11,396 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 347 transitions. [2022-01-10 03:35:11,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:35:11,397 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 347 transitions. [2022-01-10 03:35:11,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 03:35:11,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:35:11,397 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:35:11,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-01-10 03:35:11,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:35:11,605 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:35:11,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:35:11,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1681589548, now seen corresponding path program 1 times [2022-01-10 03:35:11,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:35:11,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47407897] [2022-01-10 03:35:11,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:35:11,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:35:11,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:35:11,607 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:35:11,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 03:35:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:35:11,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 03:35:11,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:35:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:35:11,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:35:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:35:12,046 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:35:12,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47407897] [2022-01-10 03:35:12,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47407897] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:35:12,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:35:12,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-10 03:35:12,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675976148] [2022-01-10 03:35:12,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:35:12,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 03:35:12,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:35:12,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 03:35:12,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:35:12,047 INFO L87 Difference]: Start difference. First operand 262 states and 347 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:35:12,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:35:12,282 INFO L93 Difference]: Finished difference Result 317 states and 417 transitions. [2022-01-10 03:35:12,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 03:35:12,283 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2022-01-10 03:35:12,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:35:12,284 INFO L225 Difference]: With dead ends: 317 [2022-01-10 03:35:12,284 INFO L226 Difference]: Without dead ends: 253 [2022-01-10 03:35:12,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-01-10 03:35:12,284 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 124 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:35:12,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 335 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 03:35:12,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-10 03:35:12,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-01-10 03:35:12,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 241 states have (on average 1.3236514522821576) internal successors, (319), 242 states have internal predecessors, (319), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-10 03:35:12,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 334 transitions. [2022-01-10 03:35:12,334 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 334 transitions. Word has length 41 [2022-01-10 03:35:12,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:35:12,334 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 334 transitions. [2022-01-10 03:35:12,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:35:12,334 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 334 transitions. [2022-01-10 03:35:12,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 03:35:12,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:35:12,334 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 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] [2022-01-10 03:35:12,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 03:35:12,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:35:12,542 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:35:12,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:35:12,542 INFO L85 PathProgramCache]: Analyzing trace with hash 916341538, now seen corresponding path program 1 times [2022-01-10 03:35:12,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:35:12,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39881746] [2022-01-10 03:35:12,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:35:12,543 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:35:12,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:35:12,544 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:35:12,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 03:35:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:35:12,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 03:35:12,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:35:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 03:35:13,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:35:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 03:35:13,458 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:35:13,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39881746] [2022-01-10 03:35:13,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39881746] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:35:13,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:35:13,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-01-10 03:35:13,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956407089] [2022-01-10 03:35:13,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:35:13,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 03:35:13,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:35:13,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 03:35:13,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-10 03:35:13,459 INFO L87 Difference]: Start difference. First operand 253 states and 334 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:35:14,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:35:14,217 INFO L93 Difference]: Finished difference Result 482 states and 641 transitions. [2022-01-10 03:35:14,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 03:35:14,217 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-10 03:35:14,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:35:14,218 INFO L225 Difference]: With dead ends: 482 [2022-01-10 03:35:14,218 INFO L226 Difference]: Without dead ends: 384 [2022-01-10 03:35:14,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2022-01-10 03:35:14,220 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 572 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 03:35:14,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 841 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 03:35:14,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-01-10 03:35:14,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 227. [2022-01-10 03:35:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 215 states have (on average 1.3116279069767443) internal successors, (282), 216 states have internal predecessors, (282), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-10 03:35:14,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 297 transitions. [2022-01-10 03:35:14,277 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 297 transitions. Word has length 40 [2022-01-10 03:35:14,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:35:14,278 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 297 transitions. [2022-01-10 03:35:14,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:35:14,278 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 297 transitions. [2022-01-10 03:35:14,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-10 03:35:14,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:35:14,278 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-01-10 03:35:14,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-01-10 03:35:14,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:35:14,485 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:35:14,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:35:14,486 INFO L85 PathProgramCache]: Analyzing trace with hash 335133290, now seen corresponding path program 2 times [2022-01-10 03:35:14,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:35:14,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446504951] [2022-01-10 03:35:14,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:35:14,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:35:14,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:35:14,487 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:35:14,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 03:35:14,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:35:14,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:35:14,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 03:35:14,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:35:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:35:14,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:35:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:35:15,101 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:35:15,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446504951] [2022-01-10 03:35:15,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446504951] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:35:15,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:35:15,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-10 03:35:15,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722809908] [2022-01-10 03:35:15,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:35:15,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 03:35:15,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:35:15,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 03:35:15,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:35:15,102 INFO L87 Difference]: Start difference. First operand 227 states and 297 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:35:15,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:35:15,554 INFO L93 Difference]: Finished difference Result 305 states and 397 transitions. [2022-01-10 03:35:15,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 03:35:15,555 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2022-01-10 03:35:15,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:35:15,562 INFO L225 Difference]: With dead ends: 305 [2022-01-10 03:35:15,562 INFO L226 Difference]: Without dead ends: 250 [2022-01-10 03:35:15,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-01-10 03:35:15,563 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 115 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:35:15,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 371 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 03:35:15,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-01-10 03:35:15,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 226. [2022-01-10 03:35:15,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 214 states have (on average 1.3037383177570094) internal successors, (279), 215 states have internal predecessors, (279), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-10 03:35:15,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 294 transitions. [2022-01-10 03:35:15,629 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 294 transitions. Word has length 43 [2022-01-10 03:35:15,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:35:15,629 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 294 transitions. [2022-01-10 03:35:15,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:35:15,629 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 294 transitions. [2022-01-10 03:35:15,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 03:35:15,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:35:15,631 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 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] [2022-01-10 03:35:15,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-01-10 03:35:15,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:35:15,840 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:35:15,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:35:15,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1477368771, now seen corresponding path program 1 times [2022-01-10 03:35:15,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:35:15,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613942011] [2022-01-10 03:35:15,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:35:15,841 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:35:15,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:35:15,842 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:35:15,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 03:35:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:35:16,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-10 03:35:16,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:35:16,623 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-01-10 03:35:16,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 20 [2022-01-10 03:35:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 03:35:16,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:35:17,462 INFO L353 Elim1Store]: treesize reduction 25, result has 81.6 percent of original size [2022-01-10 03:35:17,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 118 [2022-01-10 03:35:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 03:35:20,886 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:35:20,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613942011] [2022-01-10 03:35:20,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613942011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:35:20,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:35:20,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2022-01-10 03:35:20,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176929146] [2022-01-10 03:35:20,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:35:20,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 03:35:20,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:35:20,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 03:35:20,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-01-10 03:35:20,888 INFO L87 Difference]: Start difference. First operand 226 states and 294 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:35:23,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:35:23,615 INFO L93 Difference]: Finished difference Result 477 states and 641 transitions. [2022-01-10 03:35:23,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 03:35:23,616 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-10 03:35:23,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:35:23,617 INFO L225 Difference]: With dead ends: 477 [2022-01-10 03:35:23,617 INFO L226 Difference]: Without dead ends: 428 [2022-01-10 03:35:23,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-01-10 03:35:23,618 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 277 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:35:23,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 936 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-10 03:35:23,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-01-10 03:35:23,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 249. [2022-01-10 03:35:23,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 237 states have (on average 1.3080168776371308) internal successors, (310), 238 states have internal predecessors, (310), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-10 03:35:23,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 325 transitions. [2022-01-10 03:35:23,651 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 325 transitions. Word has length 41 [2022-01-10 03:35:23,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:35:23,651 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 325 transitions. [2022-01-10 03:35:23,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:35:23,651 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 325 transitions. [2022-01-10 03:35:23,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 03:35:23,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:35:23,651 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-01-10 03:35:23,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-01-10 03:35:23,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:35:23,860 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:35:23,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:35:23,860 INFO L85 PathProgramCache]: Analyzing trace with hash -374018524, now seen corresponding path program 2 times [2022-01-10 03:35:23,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:35:23,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414697604] [2022-01-10 03:35:23,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:35:23,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:35:23,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:35:23,876 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:35:23,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-01-10 03:35:23,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:35:23,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:35:23,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 03:35:23,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:35:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 03:35:24,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:35:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 03:35:25,285 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:35:25,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1414697604] [2022-01-10 03:35:25,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1414697604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:35:25,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:35:25,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2022-01-10 03:35:25,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691904347] [2022-01-10 03:35:25,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:35:25,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-10 03:35:25,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:35:25,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-10 03:35:25,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2022-01-10 03:35:25,286 INFO L87 Difference]: Start difference. First operand 249 states and 325 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:35:29,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:35:29,751 INFO L93 Difference]: Finished difference Result 1057 states and 1415 transitions. [2022-01-10 03:35:29,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-10 03:35:29,751 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-10 03:35:29,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:35:29,754 INFO L225 Difference]: With dead ends: 1057 [2022-01-10 03:35:29,754 INFO L226 Difference]: Without dead ends: 902 [2022-01-10 03:35:29,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1121, Invalid=3991, Unknown=0, NotChecked=0, Total=5112 [2022-01-10 03:35:29,755 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 1439 mSDsluCounter, 1643 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 1790 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-10 03:35:29,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1443 Valid, 1790 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-10 03:35:29,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-01-10 03:35:29,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 303. [2022-01-10 03:35:29,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 290 states have (on average 1.313793103448276) internal successors, (381), 291 states have internal predecessors, (381), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 03:35:29,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 398 transitions. [2022-01-10 03:35:29,800 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 398 transitions. Word has length 42 [2022-01-10 03:35:29,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:35:29,801 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 398 transitions. [2022-01-10 03:35:29,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:35:29,801 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 398 transitions. [2022-01-10 03:35:29,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-10 03:35:29,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:35:29,801 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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 03:35:29,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-01-10 03:35:30,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:35:30,009 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:35:30,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:35:30,010 INFO L85 PathProgramCache]: Analyzing trace with hash 841725603, now seen corresponding path program 2 times [2022-01-10 03:35:30,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:35:30,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489322689] [2022-01-10 03:35:30,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:35:30,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:35:30,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:35:30,011 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:35:30,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-01-10 03:35:30,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:35:30,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:35:30,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 03:35:30,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:35:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 03:35:30,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:35:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 03:35:30,476 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:35:30,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489322689] [2022-01-10 03:35:30,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489322689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:35:30,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:35:30,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-01-10 03:35:30,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3245221] [2022-01-10 03:35:30,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:35:30,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 03:35:30,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:35:30,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 03:35:30,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-01-10 03:35:30,477 INFO L87 Difference]: Start difference. First operand 303 states and 398 transitions. Second operand has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:35:31,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:35:31,431 INFO L93 Difference]: Finished difference Result 422 states and 575 transitions. [2022-01-10 03:35:31,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 03:35:31,431 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-10 03:35:31,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:35:31,432 INFO L225 Difference]: With dead ends: 422 [2022-01-10 03:35:31,432 INFO L226 Difference]: Without dead ends: 385 [2022-01-10 03:35:31,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2022-01-10 03:35:31,435 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 186 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 03:35:31,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 891 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 03:35:31,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-01-10 03:35:31,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 375. [2022-01-10 03:35:31,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 362 states have (on average 1.3176795580110496) internal successors, (477), 363 states have internal predecessors, (477), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 03:35:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 494 transitions. [2022-01-10 03:35:31,528 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 494 transitions. Word has length 43 [2022-01-10 03:35:31,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:35:31,528 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 494 transitions. [2022-01-10 03:35:31,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:35:31,528 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 494 transitions. [2022-01-10 03:35:31,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 03:35:31,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:35:31,529 INFO L514 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1] [2022-01-10 03:35:31,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-01-10 03:35:31,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:35:31,737 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:35:31,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:35:31,737 INFO L85 PathProgramCache]: Analyzing trace with hash -2028075032, now seen corresponding path program 3 times [2022-01-10 03:35:31,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:35:31,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253964797] [2022-01-10 03:35:31,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:35:31,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:35:31,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:35:31,738 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:35:31,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-01-10 03:35:31,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 03:35:31,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:35:31,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 03:35:31,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:35:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 03:35:32,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:35:32,084 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:35:32,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253964797] [2022-01-10 03:35:32,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253964797] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:35:32,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:35:32,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 03:35:32,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749265730] [2022-01-10 03:35:32,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:35:32,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:35:32,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:35:32,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:35:32,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:35:32,085 INFO L87 Difference]: Start difference. First operand 375 states and 494 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 03:35:32,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:35:32,141 INFO L93 Difference]: Finished difference Result 432 states and 566 transitions. [2022-01-10 03:35:32,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:35:32,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2022-01-10 03:35:32,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:35:32,142 INFO L225 Difference]: With dead ends: 432 [2022-01-10 03:35:32,142 INFO L226 Difference]: Without dead ends: 387 [2022-01-10 03:35:32,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:35:32,143 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 5 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:35:32,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 190 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 42 Unchecked, 0.0s Time] [2022-01-10 03:35:32,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-01-10 03:35:32,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 375. [2022-01-10 03:35:32,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 362 states have (on average 1.3149171270718232) internal successors, (476), 363 states have internal predecessors, (476), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 03:35:32,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 493 transitions. [2022-01-10 03:35:32,214 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 493 transitions. Word has length 45 [2022-01-10 03:35:32,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:35:32,214 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 493 transitions. [2022-01-10 03:35:32,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 03:35:32,215 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 493 transitions. [2022-01-10 03:35:32,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-10 03:35:32,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:35:32,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-01-10 03:35:32,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-01-10 03:35:32,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:35:32,422 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:35:32,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:35:32,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1968671326, now seen corresponding path program 2 times [2022-01-10 03:35:32,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:35:32,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247161624] [2022-01-10 03:35:32,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:35:32,423 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:35:32,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:35:32,424 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:35:32,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-01-10 03:35:32,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:35:32,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:35:32,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 03:35:32,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:35:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:35:32,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:35:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 03:35:35,113 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:35:35,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247161624] [2022-01-10 03:35:35,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247161624] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:35:35,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:35:35,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2022-01-10 03:35:35,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892168186] [2022-01-10 03:35:35,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:35:35,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-10 03:35:35,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:35:35,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-10 03:35:35,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2022-01-10 03:35:35,114 INFO L87 Difference]: Start difference. First operand 375 states and 493 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:35:40,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:35:40,095 INFO L93 Difference]: Finished difference Result 1473 states and 1978 transitions. [2022-01-10 03:35:40,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-10 03:35:40,096 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-01-10 03:35:40,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:35:40,100 INFO L225 Difference]: With dead ends: 1473 [2022-01-10 03:35:40,100 INFO L226 Difference]: Without dead ends: 1271 [2022-01-10 03:35:40,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=979, Invalid=3577, Unknown=0, NotChecked=0, Total=4556 [2022-01-10 03:35:40,102 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 1683 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1690 SdHoareTripleChecker+Valid, 2470 SdHoareTripleChecker+Invalid, 2162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-10 03:35:40,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1690 Valid, 2470 Invalid, 2162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 1699 Invalid, 0 Unknown, 87 Unchecked, 2.4s Time] [2022-01-10 03:35:40,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2022-01-10 03:35:40,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 453. [2022-01-10 03:35:40,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 440 states have (on average 1.3431818181818183) internal successors, (591), 441 states have internal predecessors, (591), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 03:35:40,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 608 transitions. [2022-01-10 03:35:40,195 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 608 transitions. Word has length 44 [2022-01-10 03:35:40,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:35:40,195 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 608 transitions. [2022-01-10 03:35:40,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:35:40,195 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 608 transitions. [2022-01-10 03:35:40,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-10 03:35:40,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:35:40,196 INFO L514 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:35:40,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-01-10 03:35:40,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:35:40,404 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:35:40,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:35:40,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1011805829, now seen corresponding path program 1 times [2022-01-10 03:35:40,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:35:40,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307175817] [2022-01-10 03:35:40,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:35:40,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:35:40,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:35:40,405 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:35:40,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-01-10 03:35:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:35:40,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 03:35:40,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:35:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:35:40,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:35:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 03:35:41,864 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:35:41,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307175817] [2022-01-10 03:35:41,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307175817] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:35:41,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:35:41,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-01-10 03:35:41,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430184466] [2022-01-10 03:35:41,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:35:41,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-10 03:35:41,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:35:41,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-10 03:35:41,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2022-01-10 03:35:41,865 INFO L87 Difference]: Start difference. First operand 453 states and 608 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 03:35:44,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:35:44,676 INFO L93 Difference]: Finished difference Result 889 states and 1177 transitions. [2022-01-10 03:35:44,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-10 03:35:44,676 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2022-01-10 03:35:44,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:35:44,678 INFO L225 Difference]: With dead ends: 889 [2022-01-10 03:35:44,678 INFO L226 Difference]: Without dead ends: 777 [2022-01-10 03:35:44,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=713, Invalid=2479, Unknown=0, NotChecked=0, Total=3192 [2022-01-10 03:35:44,679 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1175 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1175 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:35:44,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1175 Valid, 934 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 03:35:44,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-01-10 03:35:44,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 453. [2022-01-10 03:35:44,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 440 states have (on average 1.3204545454545455) internal successors, (581), 441 states have internal predecessors, (581), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 03:35:44,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 598 transitions. [2022-01-10 03:35:44,765 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 598 transitions. Word has length 48 [2022-01-10 03:35:44,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:35:44,765 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 598 transitions. [2022-01-10 03:35:44,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 03:35:44,765 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 598 transitions. [2022-01-10 03:35:44,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 03:35:44,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:35:44,766 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 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 03:35:44,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-01-10 03:35:44,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:35:44,974 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:35:44,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:35:44,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1719898279, now seen corresponding path program 3 times [2022-01-10 03:35:44,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:35:44,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258927858] [2022-01-10 03:35:44,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:35:44,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:35:44,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:35:44,975 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:35:44,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-01-10 03:35:45,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 03:35:45,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:35:45,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 03:35:45,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:35:45,310 INFO L353 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-01-10 03:35:45,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 10 [2022-01-10 03:35:45,339 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-10 03:35:45,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:35:45,704 INFO L353 Elim1Store]: treesize reduction 38, result has 72.1 percent of original size [2022-01-10 03:35:45,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 105 [2022-01-10 03:35:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-10 03:35:46,331 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:35:46,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258927858] [2022-01-10 03:35:46,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258927858] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:35:46,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:35:46,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-01-10 03:35:46,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125436747] [2022-01-10 03:35:46,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:35:46,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 03:35:46,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:35:46,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 03:35:46,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:35:46,332 INFO L87 Difference]: Start difference. First operand 453 states and 598 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:35:47,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:35:47,521 INFO L93 Difference]: Finished difference Result 819 states and 1092 transitions. [2022-01-10 03:35:47,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 03:35:47,521 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-10 03:35:47,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:35:47,523 INFO L225 Difference]: With dead ends: 819 [2022-01-10 03:35:47,523 INFO L226 Difference]: Without dead ends: 676 [2022-01-10 03:35:47,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2022-01-10 03:35:47,524 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 205 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 03:35:47,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 558 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 03:35:47,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-01-10 03:35:47,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 453. [2022-01-10 03:35:47,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 440 states have (on average 1.3068181818181819) internal successors, (575), 441 states have internal predecessors, (575), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 03:35:47,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 592 transitions. [2022-01-10 03:35:47,612 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 592 transitions. Word has length 47 [2022-01-10 03:35:47,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:35:47,612 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 592 transitions. [2022-01-10 03:35:47,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:35:47,612 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 592 transitions. [2022-01-10 03:35:47,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 03:35:47,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:35:47,613 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 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 03:35:47,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-01-10 03:35:47,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:35:47,821 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:35:47,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:35:47,821 INFO L85 PathProgramCache]: Analyzing trace with hash 862887189, now seen corresponding path program 4 times [2022-01-10 03:35:47,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:35:47,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187556201] [2022-01-10 03:35:47,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 03:35:47,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:35:47,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:35:47,824 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:35:47,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-01-10 03:35:48,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 03:35:48,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:35:48,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-10 03:35:48,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:35:48,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 03:35:48,909 INFO L353 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2022-01-10 03:35:48,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 25 [2022-01-10 03:35:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 03:35:48,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:35:50,470 INFO L353 Elim1Store]: treesize reduction 26, result has 81.3 percent of original size [2022-01-10 03:35:50,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 120