/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/array-examples/standard_compare_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:05:55,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:05:55,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:05:55,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 22:05:55,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:05:55,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:05:55,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:05:55,384 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 22:05:55,416 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:05:55,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:05:55,417 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:05:55,417 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:05:55,418 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:05:55,419 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:05:55,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:05:55,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:05:55,419 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:05:55,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:05:55,420 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:05:55,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:05:55,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:05:55,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:05:55,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:05:55,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:05:55,421 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:05:55,421 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:05:55,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:05:55,421 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:05:55,421 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:05:55,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:05:55,422 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:05:55,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:05:55,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:05:55,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:05:55,422 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:05:55,422 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:05:55,423 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:05:55,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:05:55,423 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:05:55,423 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:05:55,423 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:05:55,423 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:05:55,423 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:05:55,423 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:05:55,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:05:55,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:05:55,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:05:55,672 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:05:55,672 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:05:55,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_compare_ground.i [2023-03-30 22:05:56,835 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:05:56,991 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:05:56,991 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_compare_ground.i [2023-03-30 22:05:56,996 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5754c0973/3eed2926c1754b38ba644aa93a5673e5/FLAG11c3c3b0f [2023-03-30 22:05:57,007 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5754c0973/3eed2926c1754b38ba644aa93a5673e5 [2023-03-30 22:05:57,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:05:57,010 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:05:57,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:05:57,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:05:57,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:05:57,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:05:57" (1/1) ... [2023-03-30 22:05:57,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@239e5532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:57, skipping insertion in model container [2023-03-30 22:05:57,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:05:57" (1/1) ... [2023-03-30 22:05:57,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:05:57,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:05:57,145 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_compare_ground.i[816,829] [2023-03-30 22:05:57,157 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:05:57,164 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:05:57,173 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_compare_ground.i[816,829] [2023-03-30 22:05:57,179 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:05:57,192 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:05:57,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:57 WrapperNode [2023-03-30 22:05:57,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:05:57,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:05:57,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:05:57,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:05:57,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:57" (1/1) ... [2023-03-30 22:05:57,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:57" (1/1) ... [2023-03-30 22:05:57,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:57" (1/1) ... [2023-03-30 22:05:57,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:57" (1/1) ... [2023-03-30 22:05:57,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:57" (1/1) ... [2023-03-30 22:05:57,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:57" (1/1) ... [2023-03-30 22:05:57,227 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:57" (1/1) ... [2023-03-30 22:05:57,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:57" (1/1) ... [2023-03-30 22:05:57,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:05:57,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:05:57,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:05:57,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:05:57,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:57" (1/1) ... [2023-03-30 22:05:57,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:05:57,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:57,257 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) [2023-03-30 22:05:57,282 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 [2023-03-30 22:05:57,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:05:57,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:05:57,302 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:05:57,302 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-30 22:05:57,302 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:05:57,302 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:05:57,302 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:05:57,302 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-30 22:05:57,302 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-30 22:05:57,303 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:05:57,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:05:57,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-30 22:05:57,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:05:57,303 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:05:57,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-30 22:05:57,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:05:57,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:05:57,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:05:57,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:05:57,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:05:57,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:05:57,379 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:05:57,381 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:05:57,523 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:05:57,528 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:05:57,529 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-30 22:05:57,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:05:57 BoogieIcfgContainer [2023-03-30 22:05:57,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:05:57,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:05:57,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:05:57,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:05:57,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:05:57" (1/3) ... [2023-03-30 22:05:57,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21613851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:05:57, skipping insertion in model container [2023-03-30 22:05:57,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:05:57" (2/3) ... [2023-03-30 22:05:57,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21613851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:05:57, skipping insertion in model container [2023-03-30 22:05:57,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:05:57" (3/3) ... [2023-03-30 22:05:57,538 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_compare_ground.i [2023-03-30 22:05:57,562 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:05:57,562 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:05:57,634 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:05:57,641 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@735316a4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:05:57,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:05:57,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:05:57,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-30 22:05:57,650 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:57,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:57,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:57,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:57,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1708474480, now seen corresponding path program 1 times [2023-03-30 22:05:57,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:57,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396682777] [2023-03-30 22:05:57,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:57,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:57,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:57,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:57,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:05:57,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:57,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396682777] [2023-03-30 22:05:57,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396682777] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:05:57,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:05:57,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:05:57,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626273684] [2023-03-30 22:05:57,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:05:57,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:05:57,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:57,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:05:57,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:05:57,887 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:58,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:58,005 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2023-03-30 22:05:58,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:05:58,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-03-30 22:05:58,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:58,013 INFO L225 Difference]: With dead ends: 48 [2023-03-30 22:05:58,013 INFO L226 Difference]: Without dead ends: 23 [2023-03-30 22:05:58,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:05:58,018 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:58,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 10 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:05:58,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-03-30 22:05:58,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-03-30 22:05:58,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:05:58,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-03-30 22:05:58,049 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2023-03-30 22:05:58,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:58,050 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-03-30 22:05:58,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:58,050 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-03-30 22:05:58,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-30 22:05:58,051 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:58,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:58,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:05:58,051 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:58,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:58,052 INFO L85 PathProgramCache]: Analyzing trace with hash -626288193, now seen corresponding path program 1 times [2023-03-30 22:05:58,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:58,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416339250] [2023-03-30 22:05:58,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:58,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:58,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:05:58,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:58,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416339250] [2023-03-30 22:05:58,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416339250] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:05:58,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:05:58,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:05:58,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608927139] [2023-03-30 22:05:58,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:05:58,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:05:58,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:58,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:05:58,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:05:58,155 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:58,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:58,210 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2023-03-30 22:05:58,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:05:58,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-03-30 22:05:58,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:58,211 INFO L225 Difference]: With dead ends: 40 [2023-03-30 22:05:58,212 INFO L226 Difference]: Without dead ends: 25 [2023-03-30 22:05:58,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:05:58,213 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:58,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 12 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:05:58,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-03-30 22:05:58,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-03-30 22:05:58,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:05:58,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-03-30 22:05:58,221 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2023-03-30 22:05:58,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:58,221 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-03-30 22:05:58,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:58,222 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-03-30 22:05:58,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-30 22:05:58,222 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:58,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:58,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:05:58,223 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:58,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:58,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1733903587, now seen corresponding path program 1 times [2023-03-30 22:05:58,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:58,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892558915] [2023-03-30 22:05:58,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:58,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:58,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:05:58,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:58,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892558915] [2023-03-30 22:05:58,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892558915] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:05:58,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704104722] [2023-03-30 22:05:58,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:58,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:58,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:58,338 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:05:58,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:05:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:58,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-30 22:05:58,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:05:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:05:58,456 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:05:58,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704104722] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:05:58,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:05:58,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 22:05:58,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120593089] [2023-03-30 22:05:58,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:05:58,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:05:58,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:58,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:05:58,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:05:58,458 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:58,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:58,474 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2023-03-30 22:05:58,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:05:58,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-03-30 22:05:58,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:58,478 INFO L225 Difference]: With dead ends: 38 [2023-03-30 22:05:58,478 INFO L226 Difference]: Without dead ends: 27 [2023-03-30 22:05:58,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:05:58,479 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:58,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:05:58,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-03-30 22:05:58,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-03-30 22:05:58,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:05:58,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-03-30 22:05:58,485 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2023-03-30 22:05:58,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:58,486 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-03-30 22:05:58,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:58,486 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-03-30 22:05:58,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-03-30 22:05:58,486 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:58,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:58,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 22:05:58,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:58,688 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:58,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:58,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1242006761, now seen corresponding path program 1 times [2023-03-30 22:05:58,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:58,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948836730] [2023-03-30 22:05:58,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:58,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:58,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:05:58,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:58,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948836730] [2023-03-30 22:05:58,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948836730] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:05:58,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112648863] [2023-03-30 22:05:58,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:58,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:58,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:58,784 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:05:58,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:05:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:58,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-30 22:05:58,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:05:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:05:58,848 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:05:58,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112648863] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:05:58,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:05:58,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 22:05:58,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54834778] [2023-03-30 22:05:58,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:05:58,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:05:58,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:58,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:05:58,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:05:58,850 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:58,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:58,858 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-03-30 22:05:58,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:05:58,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-03-30 22:05:58,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:58,859 INFO L225 Difference]: With dead ends: 39 [2023-03-30 22:05:58,860 INFO L226 Difference]: Without dead ends: 25 [2023-03-30 22:05:58,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:05:58,861 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:58,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 52 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:05:58,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-03-30 22:05:58,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-03-30 22:05:58,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:05:58,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-03-30 22:05:58,867 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2023-03-30 22:05:58,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:58,868 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-03-30 22:05:58,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:58,868 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-03-30 22:05:58,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-03-30 22:05:58,869 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:58,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:58,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-30 22:05:59,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-30 22:05:59,076 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:59,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:59,077 INFO L85 PathProgramCache]: Analyzing trace with hash -561948391, now seen corresponding path program 1 times [2023-03-30 22:05:59,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:59,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380962957] [2023-03-30 22:05:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:59,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:59,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:59,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:05:59,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:59,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380962957] [2023-03-30 22:05:59,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380962957] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:05:59,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474243911] [2023-03-30 22:05:59,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:59,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:59,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:59,203 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:05:59,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:05:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:59,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-30 22:05:59,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:05:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:05:59,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:05:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:05:59,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474243911] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:05:59,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:05:59,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-03-30 22:05:59,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527469762] [2023-03-30 22:05:59,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:05:59,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 22:05:59,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:59,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 22:05:59,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:05:59,326 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:59,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:59,439 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2023-03-30 22:05:59,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:05:59,440 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-03-30 22:05:59,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:59,441 INFO L225 Difference]: With dead ends: 47 [2023-03-30 22:05:59,441 INFO L226 Difference]: Without dead ends: 31 [2023-03-30 22:05:59,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:05:59,444 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:59,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 17 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:05:59,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-03-30 22:05:59,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-03-30 22:05:59,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:05:59,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2023-03-30 22:05:59,460 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 20 [2023-03-30 22:05:59,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:59,460 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2023-03-30 22:05:59,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:59,460 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2023-03-30 22:05:59,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-30 22:05:59,461 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:59,462 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:59,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:05:59,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:59,670 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:59,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:59,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1506288575, now seen corresponding path program 2 times [2023-03-30 22:05:59,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:59,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793092207] [2023-03-30 22:05:59,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:59,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:59,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-30 22:05:59,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:59,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793092207] [2023-03-30 22:05:59,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793092207] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:05:59,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469078702] [2023-03-30 22:05:59,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:05:59,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:59,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:59,793 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:05:59,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:05:59,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:05:59,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:05:59,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-30 22:05:59,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:05:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-30 22:05:59,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:05:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-30 22:05:59,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469078702] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:05:59,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:05:59,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-03-30 22:05:59,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008632028] [2023-03-30 22:05:59,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:05:59,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 22:05:59,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:59,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 22:05:59,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:05:59,935 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:06:00,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:06:00,026 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2023-03-30 22:06:00,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:06:00,027 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-03-30 22:06:00,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:06:00,029 INFO L225 Difference]: With dead ends: 51 [2023-03-30 22:06:00,029 INFO L226 Difference]: Without dead ends: 40 [2023-03-30 22:06:00,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:06:00,031 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:06:00,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 22 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:06:00,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-03-30 22:06:00,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-03-30 22:06:00,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:06:00,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-03-30 22:06:00,043 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 26 [2023-03-30 22:06:00,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:06:00,043 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-03-30 22:06:00,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:06:00,044 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-03-30 22:06:00,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-03-30 22:06:00,045 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:06:00,045 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:06:00,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 22:06:00,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:06:00,251 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:06:00,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:06:00,252 INFO L85 PathProgramCache]: Analyzing trace with hash 2046330935, now seen corresponding path program 3 times [2023-03-30 22:06:00,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:06:00,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917511382] [2023-03-30 22:06:00,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:06:00,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:06:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:00,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:06:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-30 22:06:00,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:06:00,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917511382] [2023-03-30 22:06:00,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917511382] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:06:00,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888583382] [2023-03-30 22:06:00,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:06:00,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:06:00,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:06:00,404 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:06:00,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 22:06:00,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-30 22:06:00,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:06:00,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 27 conjunts are in the unsatisfiable core [2023-03-30 22:06:00,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:06:00,790 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-03-30 22:06:00,790 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 10 [2023-03-30 22:06:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-03-30 22:06:00,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:06:00,993 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-03-30 22:06:00,993 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 48 [2023-03-30 22:06:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-03-30 22:06:01,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888583382] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:06:01,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:06:01,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 22 [2023-03-30 22:06:01,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471553007] [2023-03-30 22:06:01,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:06:01,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-03-30 22:06:01,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:06:01,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-03-30 22:06:01,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2023-03-30 22:06:01,045 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:06:01,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:06:01,533 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2023-03-30 22:06:01,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-03-30 22:06:01,533 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2023-03-30 22:06:01,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:06:01,535 INFO L225 Difference]: With dead ends: 76 [2023-03-30 22:06:01,535 INFO L226 Difference]: Without dead ends: 51 [2023-03-30 22:06:01,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2023-03-30 22:06:01,537 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 63 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:06:01,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 77 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:06:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-03-30 22:06:01,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2023-03-30 22:06:01,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.075) internal successors, (43), 41 states have internal predecessors, (43), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:06:01,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2023-03-30 22:06:01,548 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 35 [2023-03-30 22:06:01,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:06:01,548 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2023-03-30 22:06:01,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:06:01,548 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2023-03-30 22:06:01,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-30 22:06:01,551 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:06:01,551 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:06:01,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-03-30 22:06:01,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:06:01,761 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:06:01,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:06:01,762 INFO L85 PathProgramCache]: Analyzing trace with hash -731421748, now seen corresponding path program 1 times [2023-03-30 22:06:01,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:06:01,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817208242] [2023-03-30 22:06:01,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:06:01,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:06:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:01,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:06:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:01,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-03-30 22:06:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:01,875 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:06:01,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:06:01,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817208242] [2023-03-30 22:06:01,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817208242] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:06:01,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754835976] [2023-03-30 22:06:01,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:06:01,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:06:01,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:06:01,877 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:06:01,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 22:06:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:01,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:06:01,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:06:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-03-30 22:06:01,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:06:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:06:02,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754835976] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:06:02,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:06:02,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2023-03-30 22:06:02,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467328445] [2023-03-30 22:06:02,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:06:02,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-30 22:06:02,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:06:02,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-30 22:06:02,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2023-03-30 22:06:02,066 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:06:02,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:06:02,239 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2023-03-30 22:06:02,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-30 22:06:02,240 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2023-03-30 22:06:02,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:06:02,243 INFO L225 Difference]: With dead ends: 93 [2023-03-30 22:06:02,243 INFO L226 Difference]: Without dead ends: 62 [2023-03-30 22:06:02,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=288, Invalid=468, Unknown=0, NotChecked=0, Total=756 [2023-03-30 22:06:02,245 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 44 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:06:02,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 12 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:06:02,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-03-30 22:06:02,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-03-30 22:06:02,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 55 states have internal predecessors, (57), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:06:02,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2023-03-30 22:06:02,266 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 45 [2023-03-30 22:06:02,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:06:02,267 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2023-03-30 22:06:02,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:06:02,268 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2023-03-30 22:06:02,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-03-30 22:06:02,272 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:06:02,272 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:06:02,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-30 22:06:02,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:06:02,479 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:06:02,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:06:02,479 INFO L85 PathProgramCache]: Analyzing trace with hash -778720162, now seen corresponding path program 2 times [2023-03-30 22:06:02,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:06:02,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250440725] [2023-03-30 22:06:02,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:06:02,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:06:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:02,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:06:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:02,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-03-30 22:06:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:06:02,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:06:02,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250440725] [2023-03-30 22:06:02,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250440725] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:06:02,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916724673] [2023-03-30 22:06:02,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:06:02,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:06:02,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:06:02,757 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:06:02,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-30 22:06:02,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:06:02,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:06:02,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 14 conjunts are in the unsatisfiable core [2023-03-30 22:06:02,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:06:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-03-30 22:06:02,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:06:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:06:03,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916724673] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:06:03,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:06:03,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2023-03-30 22:06:03,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853406341] [2023-03-30 22:06:03,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:06:03,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-03-30 22:06:03,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:06:03,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-03-30 22:06:03,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2023-03-30 22:06:03,226 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:06:03,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:06:03,752 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2023-03-30 22:06:03,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-03-30 22:06:03,753 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2023-03-30 22:06:03,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:06:03,754 INFO L225 Difference]: With dead ends: 121 [2023-03-30 22:06:03,754 INFO L226 Difference]: Without dead ends: 90 [2023-03-30 22:06:03,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1163, Invalid=1917, Unknown=0, NotChecked=0, Total=3080 [2023-03-30 22:06:03,757 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 72 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:06:03,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 32 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:06:03,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-03-30 22:06:03,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-03-30 22:06:03,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 83 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:06:03,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2023-03-30 22:06:03,772 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 59 [2023-03-30 22:06:03,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:06:03,772 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2023-03-30 22:06:03,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:06:03,772 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2023-03-30 22:06:03,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-03-30 22:06:03,775 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:06:03,775 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:06:03,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-30 22:06:03,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:06:03,984 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:06:03,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:06:03,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1354029310, now seen corresponding path program 3 times [2023-03-30 22:06:03,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:06:03,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587475488] [2023-03-30 22:06:03,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:06:03,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:06:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:04,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:06:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:04,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-03-30 22:06:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:06:04,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:06:04,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587475488] [2023-03-30 22:06:04,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587475488] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:06:04,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310697230] [2023-03-30 22:06:04,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:06:04,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:06:04,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:06:04,890 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:06:04,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-30 22:06:05,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-03-30 22:06:05,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:06:05,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:06:05,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:06:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2023-03-30 22:06:05,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:06:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2023-03-30 22:06:05,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310697230] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:06:05,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:06:05,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 7, 7] total 40 [2023-03-30 22:06:05,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666793491] [2023-03-30 22:06:05,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:06:05,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-03-30 22:06:05,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:06:05,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-03-30 22:06:05,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=1087, Unknown=0, NotChecked=0, Total=1560 [2023-03-30 22:06:05,240 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 40 states, 40 states have (on average 2.65) internal successors, (106), 39 states have internal predecessors, (106), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:06:06,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:06:06,094 INFO L93 Difference]: Finished difference Result 142 states and 152 transitions. [2023-03-30 22:06:06,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-03-30 22:06:06,094 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.65) internal successors, (106), 39 states have internal predecessors, (106), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 87 [2023-03-30 22:06:06,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:06:06,095 INFO L225 Difference]: With dead ends: 142 [2023-03-30 22:06:06,095 INFO L226 Difference]: Without dead ends: 111 [2023-03-30 22:06:06,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1413, Invalid=4439, Unknown=0, NotChecked=0, Total=5852 [2023-03-30 22:06:06,098 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 106 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:06:06,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 37 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:06:06,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-03-30 22:06:06,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2023-03-30 22:06:06,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 103 states have internal predecessors, (105), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:06:06,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2023-03-30 22:06:06,107 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 87 [2023-03-30 22:06:06,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:06:06,107 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2023-03-30 22:06:06,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.65) internal successors, (106), 39 states have internal predecessors, (106), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:06:06,108 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2023-03-30 22:06:06,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-03-30 22:06:06,108 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:06:06,108 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:06:06,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-30 22:06:06,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-30 22:06:06,314 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:06:06,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:06:06,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1393927456, now seen corresponding path program 4 times [2023-03-30 22:06:06,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:06:06,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841812561] [2023-03-30 22:06:06,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:06:06,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:06:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:07,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:06:07,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:07,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-03-30 22:06:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 2 proven. 729 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-03-30 22:06:07,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:06:07,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841812561] [2023-03-30 22:06:07,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841812561] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:06:07,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734690260] [2023-03-30 22:06:07,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:06:07,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:06:07,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:06:07,405 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:06:07,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-30 22:06:07,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:06:07,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:06:07,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 29 conjunts are in the unsatisfiable core [2023-03-30 22:06:07,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:06:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2023-03-30 22:06:07,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:06:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 2 proven. 729 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-03-30 22:06:08,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734690260] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:06:08,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:06:08,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2023-03-30 22:06:08,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111428083] [2023-03-30 22:06:08,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:06:08,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-03-30 22:06:08,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:06:08,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-03-30 22:06:08,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2023-03-30 22:06:08,670 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 60 states, 60 states have (on average 2.25) internal successors, (135), 59 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:06:10,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:06:10,136 INFO L93 Difference]: Finished difference Result 217 states and 249 transitions. [2023-03-30 22:06:10,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-03-30 22:06:10,137 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.25) internal successors, (135), 59 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 107 [2023-03-30 22:06:10,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:06:10,138 INFO L225 Difference]: With dead ends: 217 [2023-03-30 22:06:10,138 INFO L226 Difference]: Without dead ends: 168 [2023-03-30 22:06:10,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5018, Invalid=8322, Unknown=0, NotChecked=0, Total=13340 [2023-03-30 22:06:10,142 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 132 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:06:10,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 27 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:06:10,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-03-30 22:06:10,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2023-03-30 22:06:10,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 160 states have (on average 1.01875) internal successors, (163), 161 states have internal predecessors, (163), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:06:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2023-03-30 22:06:10,153 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 107 [2023-03-30 22:06:10,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:06:10,153 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2023-03-30 22:06:10,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.25) internal successors, (135), 59 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:06:10,153 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2023-03-30 22:06:10,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-03-30 22:06:10,154 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:06:10,154 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:06:10,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-30 22:06:10,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:06:10,363 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:06:10,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:06:10,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1727588486, now seen corresponding path program 5 times [2023-03-30 22:06:10,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:06:10,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285331158] [2023-03-30 22:06:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:06:10,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:06:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:13,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:06:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:13,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2023-03-30 22:06:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3285 backedges. 2 proven. 3136 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-03-30 22:06:13,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:06:13,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285331158] [2023-03-30 22:06:13,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285331158] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:06:13,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369602939] [2023-03-30 22:06:13,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-30 22:06:13,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:06:13,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:06:13,286 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:06:13,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process