/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 02:25:07,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 02:25:07,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 02:25:07,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 02:25:07,550 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 [2022-01-31 02:25:07,566 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 02:25:07,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 02:25:07,566 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-31 02:25:07,566 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-31 02:25:07,567 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-31 02:25:07,567 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-31 02:25:07,568 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-31 02:25:07,568 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-31 02:25:07,568 INFO L138 SettingsManager]: * Use SBE=true [2022-01-31 02:25:07,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 02:25:07,568 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 02:25:07,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 02:25:07,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 02:25:07,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 02:25:07,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 02:25:07,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 02:25:07,569 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 02:25:07,569 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 02:25:07,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 02:25:07,569 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 02:25:07,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 02:25:07,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 02:25:07,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 02:25:07,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 02:25:07,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 02:25:07,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 02:25:07,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-31 02:25:07,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-31 02:25:07,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 02:25:07,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-31 02:25:07,571 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-31 02:25:07,571 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-31 02:25:07,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 02:25:07,571 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 02:25:07,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 02:25:07,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 02:25:07,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 02:25:07,816 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 02:25:07,818 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 02:25:07,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2022-01-31 02:25:07,879 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08fd34452/1f5e18d228d0451aa9b723c8201501ea/FLAG66d093c37 [2022-01-31 02:25:08,311 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 02:25:08,312 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2022-01-31 02:25:08,317 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08fd34452/1f5e18d228d0451aa9b723c8201501ea/FLAG66d093c37 [2022-01-31 02:25:08,329 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08fd34452/1f5e18d228d0451aa9b723c8201501ea [2022-01-31 02:25:08,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 02:25:08,341 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 02:25:08,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 02:25:08,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 02:25:08,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 02:25:08,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:25:08" (1/1) ... [2022-01-31 02:25:08,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cc6eefd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:08, skipping insertion in model container [2022-01-31 02:25:08,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:25:08" (1/1) ... [2022-01-31 02:25:08,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 02:25:08,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 02:25:08,499 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i[920,933] [2022-01-31 02:25:08,518 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 02:25:08,527 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 02:25:08,537 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i[920,933] [2022-01-31 02:25:08,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 02:25:08,555 INFO L208 MainTranslator]: Completed translation [2022-01-31 02:25:08,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:08 WrapperNode [2022-01-31 02:25:08,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 02:25:08,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 02:25:08,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 02:25:08,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 02:25:08,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:08" (1/1) ... [2022-01-31 02:25:08,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:08" (1/1) ... [2022-01-31 02:25:08,571 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:08" (1/1) ... [2022-01-31 02:25:08,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:08" (1/1) ... [2022-01-31 02:25:08,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:08" (1/1) ... [2022-01-31 02:25:08,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:08" (1/1) ... [2022-01-31 02:25:08,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:08" (1/1) ... [2022-01-31 02:25:08,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 02:25:08,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 02:25:08,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 02:25:08,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 02:25:08,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:08" (1/1) ... [2022-01-31 02:25:08,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 02:25:08,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:25:08,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 02:25:08,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 02:25:08,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 02:25:08,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 02:25:08,659 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 02:25:08,659 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 02:25:08,660 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 02:25:08,662 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 02:25:08,662 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 02:25:08,662 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 02:25:08,662 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 02:25:08,662 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 02:25:08,662 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 02:25:08,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 02:25:08,662 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 02:25:08,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 02:25:08,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 02:25:08,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 02:25:08,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 02:25:08,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 02:25:08,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 02:25:08,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 02:25:08,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 02:25:08,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 02:25:08,737 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 02:25:08,738 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 02:25:08,915 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 02:25:08,920 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 02:25:08,920 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 02:25:08,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:25:08 BoogieIcfgContainer [2022-01-31 02:25:08,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 02:25:08,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 02:25:08,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 02:25:08,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 02:25:08,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 02:25:08" (1/3) ... [2022-01-31 02:25:08,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27739df4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:25:08, skipping insertion in model container [2022-01-31 02:25:08,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:08" (2/3) ... [2022-01-31 02:25:08,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27739df4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:25:08, skipping insertion in model container [2022-01-31 02:25:08,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:25:08" (3/3) ... [2022-01-31 02:25:08,937 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_3.i [2022-01-31 02:25:08,945 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-31 02:25:08,945 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 02:25:09,038 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 02:25:09,044 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 02:25:09,044 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 02:25:09,069 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 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) [2022-01-31 02:25:09,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 02:25:09,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:25:09,074 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:25:09,074 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:25:09,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:25:09,078 INFO L85 PathProgramCache]: Analyzing trace with hash -851892248, now seen corresponding path program 1 times [2022-01-31 02:25:09,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:25:09,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882798028] [2022-01-31 02:25:09,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:25:09,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:25:09,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:09,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:25:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:25:09,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:25:09,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882798028] [2022-01-31 02:25:09,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882798028] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 02:25:09,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 02:25:09,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 02:25:09,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109053361] [2022-01-31 02:25:09,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 02:25:09,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 02:25:09,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:25:09,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 02:25:09,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 02:25:09,387 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 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 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-01-31 02:25:09,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:25:09,552 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-01-31 02:25:09,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 02:25:09,555 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 14 [2022-01-31 02:25:09,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:25:09,562 INFO L225 Difference]: With dead ends: 47 [2022-01-31 02:25:09,563 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 02:25:09,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 02:25:09,569 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:25:09,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 02:25:09,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 02:25:09,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-01-31 02:25:09,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 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) [2022-01-31 02:25:09,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-01-31 02:25:09,604 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2022-01-31 02:25:09,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:25:09,605 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-01-31 02:25:09,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-01-31 02:25:09,606 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-01-31 02:25:09,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 02:25:09,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:25:09,607 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:25:09,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 02:25:09,609 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:25:09,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:25:09,614 INFO L85 PathProgramCache]: Analyzing trace with hash -850045206, now seen corresponding path program 1 times [2022-01-31 02:25:09,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:25:09,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132170925] [2022-01-31 02:25:09,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:25:09,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:25:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:09,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:25:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:25:09,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:25:09,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132170925] [2022-01-31 02:25:09,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132170925] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 02:25:09,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 02:25:09,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 02:25:09,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183142422] [2022-01-31 02:25:09,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 02:25:09,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 02:25:09,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:25:09,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 02:25:09,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 02:25:09,716 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-01-31 02:25:09,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:25:09,777 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2022-01-31 02:25:09,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 02:25:09,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2022-01-31 02:25:09,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:25:09,781 INFO L225 Difference]: With dead ends: 48 [2022-01-31 02:25:09,782 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 02:25:09,786 INFO L932 BasicCegarLoop]: 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 [2022-01-31 02:25:09,788 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 22 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 02:25:09,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 23 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 02:25:09,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 02:25:09,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2022-01-31 02:25:09,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 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) [2022-01-31 02:25:09,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-01-31 02:25:09,806 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2022-01-31 02:25:09,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:25:09,810 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-01-31 02:25:09,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-01-31 02:25:09,813 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-01-31 02:25:09,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 02:25:09,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:25:09,813 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:25:09,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 02:25:09,814 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:25:09,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:25:09,814 INFO L85 PathProgramCache]: Analyzing trace with hash -446317518, now seen corresponding path program 1 times [2022-01-31 02:25:09,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:25:09,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606267958] [2022-01-31 02:25:09,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:25:09,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:25:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:09,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:25:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:25:09,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:25:09,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606267958] [2022-01-31 02:25:09,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606267958] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:25:09,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945121408] [2022-01-31 02:25:09,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:25:09,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:25:09,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:25:09,941 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) [2022-01-31 02:25:09,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 02:25:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:10,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 02:25:10,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:25:10,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-31 02:25:10,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-01-31 02:25:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:25:10,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:25:10,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-31 02:25:10,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-01-31 02:25:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:25:10,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945121408] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:25:10,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:25:10,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-01-31 02:25:10,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408266908] [2022-01-31 02:25:10,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:25:10,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 02:25:10,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:25:10,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 02:25:10,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-31 02:25:10,385 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 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) [2022-01-31 02:25:10,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:25:10,616 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-01-31 02:25:10,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 02:25:10,616 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 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 15 [2022-01-31 02:25:10,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:25:10,617 INFO L225 Difference]: With dead ends: 58 [2022-01-31 02:25:10,617 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 02:25:10,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-01-31 02:25:10,619 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:25:10,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 46 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 114 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-01-31 02:25:10,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 02:25:10,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2022-01-31 02:25:10,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 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) [2022-01-31 02:25:10,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-01-31 02:25:10,626 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 15 [2022-01-31 02:25:10,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:25:10,626 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-01-31 02:25:10,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 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) [2022-01-31 02:25:10,627 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-01-31 02:25:10,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 02:25:10,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:25:10,628 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:25:10,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 02:25:10,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:25:10,839 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:25:10,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:25:10,839 INFO L85 PathProgramCache]: Analyzing trace with hash -815661078, now seen corresponding path program 2 times [2022-01-31 02:25:10,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:25:10,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085295084] [2022-01-31 02:25:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:25:10,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:25:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:10,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:25:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:25:10,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:25:10,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085295084] [2022-01-31 02:25:10,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085295084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:25:10,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461916721] [2022-01-31 02:25:10,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 02:25:10,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:25:10,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:25:10,922 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) [2022-01-31 02:25:10,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 02:25:10,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 02:25:10,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:25:10,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-31 02:25:10,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:25:10,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-31 02:25:11,018 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-01-31 02:25:11,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-01-31 02:25:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:25:11,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:25:11,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2022-01-31 02:25:11,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 126 [2022-01-31 02:25:11,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:25:11,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461916721] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:25:11,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:25:11,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 10] total 19 [2022-01-31 02:25:11,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33907755] [2022-01-31 02:25:11,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:25:11,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 02:25:11,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:25:11,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 02:25:11,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-31 02:25:11,668 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:25:12,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:25:12,129 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2022-01-31 02:25:12,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 02:25:12,129 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 02:25:12,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:25:12,130 INFO L225 Difference]: With dead ends: 66 [2022-01-31 02:25:12,130 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 02:25:12,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2022-01-31 02:25:12,131 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 02:25:12,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 70 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 257 Invalid, 0 Unknown, 81 Unchecked, 0.2s Time] [2022-01-31 02:25:12,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 02:25:12,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 27. [2022-01-31 02:25:12,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 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) [2022-01-31 02:25:12,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-01-31 02:25:12,139 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 16 [2022-01-31 02:25:12,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:25:12,142 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-01-31 02:25:12,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:25:12,142 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-01-31 02:25:12,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 02:25:12,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:25:12,143 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:25:12,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 02:25:12,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 02:25:12,362 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:25:12,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:25:12,363 INFO L85 PathProgramCache]: Analyzing trace with hash 619590450, now seen corresponding path program 3 times [2022-01-31 02:25:12,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:25:12,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76884709] [2022-01-31 02:25:12,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:25:12,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:25:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:12,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:25:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:25:12,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:25:12,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76884709] [2022-01-31 02:25:12,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76884709] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:25:12,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073235756] [2022-01-31 02:25:12,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 02:25:12,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:25:12,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:25:12,448 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) [2022-01-31 02:25:12,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 02:25:12,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 02:25:12,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:25:12,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-31 02:25:12,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:25:12,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-31 02:25:12,575 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-01-31 02:25:12,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-01-31 02:25:12,623 INFO L353 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2022-01-31 02:25:12,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2022-01-31 02:25:12,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:25:12,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:25:13,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 83 [2022-01-31 02:25:13,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2406 treesize of output 2374 [2022-01-31 02:25:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:25:14,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073235756] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:25:14,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:25:14,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 11] total 22 [2022-01-31 02:25:14,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354637248] [2022-01-31 02:25:14,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:25:14,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 02:25:14,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:25:14,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 02:25:14,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-31 02:25:14,596 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:25:15,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:25:15,462 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2022-01-31 02:25:15,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 02:25:15,462 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 02:25:15,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:25:15,463 INFO L225 Difference]: With dead ends: 72 [2022-01-31 02:25:15,463 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 02:25:15,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 02:25:15,465 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 106 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 02:25:15,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 80 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 401 Invalid, 0 Unknown, 58 Unchecked, 0.4s Time] [2022-01-31 02:25:15,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 02:25:15,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2022-01-31 02:25:15,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 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) [2022-01-31 02:25:15,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-01-31 02:25:15,478 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2022-01-31 02:25:15,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:25:15,478 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-01-31 02:25:15,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:25:15,479 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-01-31 02:25:15,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 02:25:15,479 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:25:15,479 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:25:15,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-31 02:25:15,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:25:15,680 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:25:15,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:25:15,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1582471557, now seen corresponding path program 1 times [2022-01-31 02:25:15,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:25:15,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906199752] [2022-01-31 02:25:15,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:25:15,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:25:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:15,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:25:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:15,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 02:25:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 02:25:15,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:25:15,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906199752] [2022-01-31 02:25:15,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906199752] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:25:15,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323808940] [2022-01-31 02:25:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:25:15,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:25:15,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:25:15,802 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) [2022-01-31 02:25:15,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 02:25:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:15,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 02:25:15,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:25:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 02:25:15,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:25:16,035 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 02:25:16,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323808940] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:25:16,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:25:16,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-31 02:25:16,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962025501] [2022-01-31 02:25:16,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:25:16,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 02:25:16,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:25:16,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 02:25:16,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-01-31 02:25:16,037 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 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) [2022-01-31 02:25:16,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:25:16,717 INFO L93 Difference]: Finished difference Result 107 states and 141 transitions. [2022-01-31 02:25:16,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 02:25:16,717 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 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 27 [2022-01-31 02:25:16,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:25:16,718 INFO L225 Difference]: With dead ends: 107 [2022-01-31 02:25:16,718 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 02:25:16,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2022-01-31 02:25:16,720 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 155 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 02:25:16,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 55 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 02:25:16,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 02:25:16,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 36. [2022-01-31 02:25:16,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 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) [2022-01-31 02:25:16,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-01-31 02:25:16,731 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2022-01-31 02:25:16,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:25:16,731 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-01-31 02:25:16,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 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) [2022-01-31 02:25:16,732 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-01-31 02:25:16,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 02:25:16,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:25:16,732 INFO L514 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:25:16,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 02:25:16,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:25:16,948 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:25:16,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:25:16,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1390545787, now seen corresponding path program 2 times [2022-01-31 02:25:16,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:25:16,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942291758] [2022-01-31 02:25:16,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:25:16,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:25:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:17,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:25:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:17,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 02:25:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 02:25:17,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:25:17,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942291758] [2022-01-31 02:25:17,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942291758] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:25:17,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838512576] [2022-01-31 02:25:17,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 02:25:17,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:25:17,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:25:17,196 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) [2022-01-31 02:25:17,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 02:25:17,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 02:25:17,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:25:17,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 02:25:17,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:25:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 02:25:17,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:25:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 02:25:17,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838512576] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:25:17,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:25:17,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-31 02:25:17,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823298547] [2022-01-31 02:25:17,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:25:17,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 02:25:17,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:25:17,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 02:25:17,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2022-01-31 02:25:17,871 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 states have internal predecessors, (43), 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) [2022-01-31 02:25:22,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:25:22,726 INFO L93 Difference]: Finished difference Result 191 states and 267 transitions. [2022-01-31 02:25:22,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 02:25:22,727 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 states have internal predecessors, (43), 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 33 [2022-01-31 02:25:22,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:25:22,729 INFO L225 Difference]: With dead ends: 191 [2022-01-31 02:25:22,729 INFO L226 Difference]: Without dead ends: 172 [2022-01-31 02:25:22,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=643, Invalid=1613, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 02:25:22,730 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 443 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:25:22,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 113 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 02:25:22,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-01-31 02:25:22,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 48. [2022-01-31 02:25:22,758 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) [2022-01-31 02:25:22,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-01-31 02:25:22,759 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 33 [2022-01-31 02:25:22,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:25:22,759 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-01-31 02:25:22,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 states have internal predecessors, (43), 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) [2022-01-31 02:25:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-01-31 02:25:22,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 02:25:22,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:25:22,760 INFO L514 BasicCegarLoop]: trace histogram [22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:25:22,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 02:25:22,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:25:22,976 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:25:22,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:25:22,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1481894533, now seen corresponding path program 3 times [2022-01-31 02:25:22,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:25:22,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23973412] [2022-01-31 02:25:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:25:22,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:25:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:23,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:25:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:23,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 02:25:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 02:25:23,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:25:23,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23973412] [2022-01-31 02:25:23,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23973412] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:25:23,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104327590] [2022-01-31 02:25:23,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 02:25:23,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:25:23,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:25:23,436 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) [2022-01-31 02:25:23,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 02:26:07,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-31 02:26:07,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:26:07,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 129 conjunts are in the unsatisfiable core [2022-01-31 02:26:07,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:26:07,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-31 02:26:08,029 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 02:26:08,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 02:26:08,069 INFO L353 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-01-31 02:26:08,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 02:26:08,118 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 02:26:08,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 02:26:08,157 INFO L353 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-01-31 02:26:08,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 02:26:08,200 INFO L353 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-01-31 02:26:08,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 02:26:08,242 INFO L353 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-01-31 02:26:08,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 02:26:08,284 INFO L353 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-01-31 02:26:08,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 02:26:08,330 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 02:26:08,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 02:26:08,379 INFO L353 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-01-31 02:26:08,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 02:26:08,432 INFO L353 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-01-31 02:26:08,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 02:26:08,475 INFO L353 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-01-31 02:26:08,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 02:26:08,528 INFO L353 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-01-31 02:26:08,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 02:26:08,568 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 02:26:08,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 02:26:08,617 INFO L353 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-01-31 02:26:08,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 02:26:08,668 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 02:26:08,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 02:26:08,710 INFO L353 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-01-31 02:26:08,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 02:26:08,755 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 02:26:08,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 02:26:08,808 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 02:26:08,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 02:26:08,854 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 02:26:08,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 02:26:08,902 INFO L353 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-01-31 02:26:08,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 02:26:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 02:26:08,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:29:24,719 WARN L228 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 142 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 02:30:12,846 WARN L860 $PredicateComparison]: unable to prove that (or (<= 10000 (mod (+ 19 c_main_~index~0) 4294967296)) (< (mod (+ c_main_~index~0 20) 4294967296) 10000) (forall ((v_ArrVal_219 Int) (v_ArrVal_229 Int) (v_ArrVal_217 Int) (v_ArrVal_239 Int) (v_ArrVal_227 Int) (v_ArrVal_215 Int) (v_ArrVal_226 Int) (v_ArrVal_237 Int) (v_ArrVal_248 Int) (v_ArrVal_214 Int) (v_ArrVal_236 Int) (v_ArrVal_224 Int) (v_ArrVal_234 Int) (v_ArrVal_245 Int) (v_ArrVal_211 Int) (v_ArrVal_221 Int) (v_ArrVal_243 Int) (v_ArrVal_231 Int) (v_ArrVal_241 Int) (v_ArrVal_250 Int)) (= (mod (select (store (store (store (store (store (store (store (store (store (store (store (store (store (store (store (store (store (store (store (store (select |c_#memory_int| |c_main_~#array~0.base|) (+ |c_main_~#array~0.offset| (* 4 (mod c_main_~index~0 4294967296))) v_ArrVal_211) (+ |c_main_~#array~0.offset| (* (mod (+ c_main_~index~0 1) 4294967296) 4)) v_ArrVal_214) (+ |c_main_~#array~0.offset| (* (mod (+ c_main_~index~0 2) 4294967296) 4)) v_ArrVal_215) (+ (* (mod (+ c_main_~index~0 3) 4294967296) 4) |c_main_~#array~0.offset|) v_ArrVal_217) (+ (* (mod (+ c_main_~index~0 4) 4294967296) 4) |c_main_~#array~0.offset|) v_ArrVal_219) (+ (* 4 (mod (+ c_main_~index~0 5) 4294967296)) |c_main_~#array~0.offset|) v_ArrVal_221) (+ |c_main_~#array~0.offset| (* (mod (+ c_main_~index~0 6) 4294967296) 4)) v_ArrVal_224) (+ (* (mod (+ 7 c_main_~index~0) 4294967296) 4) |c_main_~#array~0.offset|) v_ArrVal_226) (+ (* (mod (+ c_main_~index~0 8) 4294967296) 4) |c_main_~#array~0.offset|) v_ArrVal_227) (+ |c_main_~#array~0.offset| (* (mod (+ c_main_~index~0 9) 4294967296) 4)) v_ArrVal_229) (+ (* (mod (+ c_main_~index~0 10) 4294967296) 4) |c_main_~#array~0.offset|) v_ArrVal_231) (+ |c_main_~#array~0.offset| (* 4 (mod (+ c_main_~index~0 11) 4294967296))) v_ArrVal_234) (+ (* (mod (+ c_main_~index~0 12) 4294967296) 4) |c_main_~#array~0.offset|) v_ArrVal_236) (+ |c_main_~#array~0.offset| (* (mod (+ c_main_~index~0 13) 4294967296) 4)) v_ArrVal_237) (+ |c_main_~#array~0.offset| (* 4 (mod (+ c_main_~index~0 14) 4294967296))) v_ArrVal_239) (+ (* (mod (+ c_main_~index~0 15) 4294967296) 4) |c_main_~#array~0.offset|) v_ArrVal_241) (+ (* (mod (+ c_main_~index~0 16) 4294967296) 4) |c_main_~#array~0.offset|) v_ArrVal_243) (+ |c_main_~#array~0.offset| (* 4 (mod (+ c_main_~index~0 17) 4294967296))) v_ArrVal_245) (+ |c_main_~#array~0.offset| (* (mod (+ c_main_~index~0 18) 4294967296) 4)) v_ArrVal_248) (+ |c_main_~#array~0.offset| (* (mod (+ 19 c_main_~index~0) 4294967296) 4)) v_ArrVal_250) (+ |c_main_~#array~0.offset| 4)) 4294967296) 2))) is different from true [2022-01-31 02:30:12,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 238