/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/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 03:40:18,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 03:40:18,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 03:40:18,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 03:40:18,134 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 03:40:18,135 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 03:40:18,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 03:40:18,139 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 03:40:18,148 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 03:40:18,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 03:40:18,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 03:40:18,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 03:40:18,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 03:40:18,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 03:40:18,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 03:40:18,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 03:40:18,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 03:40:18,150 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 03:40:18,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 03:40:18,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 03:40:18,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 03:40:18,151 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 03:40:18,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 03:40:18,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 03:40:18,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 03:40:18,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 03:40:18,151 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 03:40:18,151 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 03:40:18,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 03:40:18,152 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 03:40:18,152 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 03:40:18,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 03:40:18,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 03:40:18,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 03:40:18,364 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 03:40:18,365 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 03:40:18,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c [2022-03-18 03:40:18,422 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6969b1281/ad533dddf63c424b836c6e22de4e9e7d/FLAGa8422c296 [2022-03-18 03:40:18,711 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 03:40:18,711 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c [2022-03-18 03:40:18,719 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6969b1281/ad533dddf63c424b836c6e22de4e9e7d/FLAGa8422c296 [2022-03-18 03:40:19,149 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6969b1281/ad533dddf63c424b836c6e22de4e9e7d [2022-03-18 03:40:19,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 03:40:19,152 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 03:40:19,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 03:40:19,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 03:40:19,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 03:40:19,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 03:40:19" (1/1) ... [2022-03-18 03:40:19,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25ef9eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:40:19, skipping insertion in model container [2022-03-18 03:40:19,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 03:40:19" (1/1) ... [2022-03-18 03:40:19,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 03:40:19,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 03:40:19,288 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c[526,539] [2022-03-18 03:40:19,301 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 03:40:19,307 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 03:40:19,315 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c[526,539] [2022-03-18 03:40:19,319 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 03:40:19,327 INFO L208 MainTranslator]: Completed translation [2022-03-18 03:40:19,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:40:19 WrapperNode [2022-03-18 03:40:19,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 03:40:19,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 03:40:19,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 03:40:19,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 03:40:19,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:40:19" (1/1) ... [2022-03-18 03:40:19,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:40:19" (1/1) ... [2022-03-18 03:40:19,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:40:19" (1/1) ... [2022-03-18 03:40:19,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:40:19" (1/1) ... [2022-03-18 03:40:19,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:40:19" (1/1) ... [2022-03-18 03:40:19,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:40:19" (1/1) ... [2022-03-18 03:40:19,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:40:19" (1/1) ... [2022-03-18 03:40:19,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 03:40:19,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 03:40:19,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 03:40:19,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 03:40:19,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:40:19" (1/1) ... [2022-03-18 03:40:19,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 03:40:19,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:40:19,371 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) [2022-03-18 03:40:19,415 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 [2022-03-18 03:40:19,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 03:40:19,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 03:40:19,447 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 03:40:19,447 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 03:40:19,447 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 03:40:19,448 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 03:40:19,448 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 03:40:19,448 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 03:40:19,448 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 03:40:19,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 03:40:19,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 03:40:19,448 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 03:40:19,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 03:40:19,449 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 03:40:19,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 03:40:19,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 03:40:19,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 03:40:19,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 03:40:19,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 03:40:19,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 03:40:19,502 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 03:40:19,503 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 03:40:19,616 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 03:40:19,621 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 03:40:19,621 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 03:40:19,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 03:40:19 BoogieIcfgContainer [2022-03-18 03:40:19,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 03:40:19,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 03:40:19,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 03:40:19,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 03:40:19,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 03:40:19" (1/3) ... [2022-03-18 03:40:19,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbaf677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 03:40:19, skipping insertion in model container [2022-03-18 03:40:19,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:40:19" (2/3) ... [2022-03-18 03:40:19,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbaf677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 03:40:19, skipping insertion in model container [2022-03-18 03:40:19,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 03:40:19" (3/3) ... [2022-03-18 03:40:19,632 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound20.c [2022-03-18 03:40:19,635 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 03:40:19,635 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 03:40:19,673 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 03:40:19,678 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2022-03-18 03:40:19,678 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 03:40:19,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 03:40:19,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 03:40:19,728 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:40:19,728 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:40:19,728 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:40:19,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:40:19,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1682617676, now seen corresponding path program 1 times [2022-03-18 03:40:19,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:19,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1569090518] [2022-03-18 03:40:19,746 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:40:19,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1682617676, now seen corresponding path program 2 times [2022-03-18 03:40:19,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:40:19,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901305754] [2022-03-18 03:40:19,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:40:19,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:40:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:40:19,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 03:40:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:40:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 03:40:19,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:40:19,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901305754] [2022-03-18 03:40:19,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901305754] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:19,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:19,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 03:40:19,868 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:40:19,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1569090518] [2022-03-18 03:40:19,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1569090518] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:19,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:19,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 03:40:19,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331490309] [2022-03-18 03:40:19,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:40:19,873 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 03:40:19,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:19,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 03:40:19,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 03:40:19,895 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-03-18 03:40:19,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:40:19,977 INFO L93 Difference]: Finished difference Result 57 states and 91 transitions. [2022-03-18 03:40:19,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 03:40:19,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2022-03-18 03:40:19,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:40:19,985 INFO L225 Difference]: With dead ends: 57 [2022-03-18 03:40:19,985 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 03:40:19,987 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 03:40:19,990 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 03:40:19,990 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 03:40:20,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 03:40:20,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-18 03:40:20,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 03:40:20,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-03-18 03:40:20,021 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2022-03-18 03:40:20,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:40:20,022 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-03-18 03:40:20,022 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-03-18 03:40:20,022 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-03-18 03:40:20,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 03:40:20,023 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:40:20,023 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:40:20,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 03:40:20,023 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:40:20,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:40:20,031 INFO L85 PathProgramCache]: Analyzing trace with hash -2144676086, now seen corresponding path program 1 times [2022-03-18 03:40:20,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:20,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [435323085] [2022-03-18 03:40:20,032 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:40:20,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2144676086, now seen corresponding path program 2 times [2022-03-18 03:40:20,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:40:20,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224517060] [2022-03-18 03:40:20,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:40:20,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:40:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:40:20,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 03:40:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:40:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 03:40:20,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:40:20,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224517060] [2022-03-18 03:40:20,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224517060] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:20,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:20,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:40:20,114 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:40:20,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [435323085] [2022-03-18 03:40:20,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [435323085] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:20,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:20,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:40:20,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391225150] [2022-03-18 03:40:20,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:40:20,116 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 03:40:20,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:20,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 03:40:20,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 03:40:20,117 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-03-18 03:40:20,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:40:20,282 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-03-18 03:40:20,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 03:40:20,283 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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 12 [2022-03-18 03:40:20,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:40:20,285 INFO L225 Difference]: With dead ends: 41 [2022-03-18 03:40:20,285 INFO L226 Difference]: Without dead ends: 39 [2022-03-18 03:40:20,287 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 03:40:20,290 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 03:40:20,292 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 91 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 03:40:20,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-18 03:40:20,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-03-18 03:40:20,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 03:40:20,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-18 03:40:20,304 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-03-18 03:40:20,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:40:20,304 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-18 03:40:20,304 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-03-18 03:40:20,304 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-18 03:40:20,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 03:40:20,305 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:40:20,305 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:40:20,305 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 03:40:20,305 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:40:20,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:40:20,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1842794081, now seen corresponding path program 1 times [2022-03-18 03:40:20,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:20,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1376440323] [2022-03-18 03:40:20,307 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:40:20,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1842794081, now seen corresponding path program 2 times [2022-03-18 03:40:20,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:40:20,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784087896] [2022-03-18 03:40:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:40:20,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:40:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:40:20,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 03:40:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:40:20,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 03:40:20,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:40:20,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784087896] [2022-03-18 03:40:20,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784087896] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:20,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:20,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 03:40:20,369 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:40:20,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1376440323] [2022-03-18 03:40:20,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1376440323] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:20,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:20,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 03:40:20,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751781730] [2022-03-18 03:40:20,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:40:20,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 03:40:20,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:20,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 03:40:20,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 03:40:20,372 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 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) [2022-03-18 03:40:20,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:40:20,446 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2022-03-18 03:40:20,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 03:40:20,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 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 [2022-03-18 03:40:20,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:40:20,449 INFO L225 Difference]: With dead ends: 46 [2022-03-18 03:40:20,449 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 03:40:20,450 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 03:40:20,452 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 03:40:20,457 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 03:40:20,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 03:40:20,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-18 03:40:20,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 03:40:20,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-18 03:40:20,473 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2022-03-18 03:40:20,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:40:20,474 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-18 03:40:20,474 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 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) [2022-03-18 03:40:20,474 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-18 03:40:20,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 03:40:20,474 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:40:20,474 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:40:20,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 03:40:20,475 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:40:20,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:40:20,475 INFO L85 PathProgramCache]: Analyzing trace with hash 311129497, now seen corresponding path program 1 times [2022-03-18 03:40:20,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:20,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1369424341] [2022-03-18 03:40:20,476 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:40:20,476 INFO L85 PathProgramCache]: Analyzing trace with hash 311129497, now seen corresponding path program 2 times [2022-03-18 03:40:20,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:40:20,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819952118] [2022-03-18 03:40:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:40:20,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:40:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:40:20,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 03:40:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:40:20,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-18 03:40:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:40:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 03:40:20,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:40:20,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819952118] [2022-03-18 03:40:20,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819952118] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:20,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:20,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:40:20,569 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:40:20,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1369424341] [2022-03-18 03:40:20,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1369424341] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:20,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:20,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:40:20,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966055222] [2022-03-18 03:40:20,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:40:20,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 03:40:20,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:20,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 03:40:20,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 03:40:20,572 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 03:40:20,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:40:20,690 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-18 03:40:20,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 03:40:20,690 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-03-18 03:40:20,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:40:20,692 INFO L225 Difference]: With dead ends: 46 [2022-03-18 03:40:20,692 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 03:40:20,693 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 03:40:20,698 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 03:40:20,699 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 03:40:20,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 03:40:20,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2022-03-18 03:40:20,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 03:40:20,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-03-18 03:40:20,716 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2022-03-18 03:40:20,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:40:20,716 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-03-18 03:40:20,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 03:40:20,716 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-03-18 03:40:20,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 03:40:20,717 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:40:20,717 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:40:20,717 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 03:40:20,718 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:40:20,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:40:20,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1912623062, now seen corresponding path program 1 times [2022-03-18 03:40:20,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:20,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [711468244] [2022-03-18 03:40:20,721 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:40:20,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1912623062, now seen corresponding path program 2 times [2022-03-18 03:40:20,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:40:20,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126159086] [2022-03-18 03:40:20,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:40:20,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:40:20,732 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:40:20,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086451656] [2022-03-18 03:40:20,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 03:40:20,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:40:20,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:40:20,740 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) [2022-03-18 03:40:20,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 03:40:20,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 03:40:20,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:40:20,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 03:40:20,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:40:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 03:40:20,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:40:20,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:40:20,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126159086] [2022-03-18 03:40:20,920 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:40:20,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086451656] [2022-03-18 03:40:20,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086451656] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:20,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:20,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:40:20,936 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:40:20,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [711468244] [2022-03-18 03:40:20,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [711468244] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:20,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:20,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:40:20,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176768418] [2022-03-18 03:40:20,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:40:20,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 03:40:20,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:20,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 03:40:20,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 03:40:20,937 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 03:40:20,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:40:20,978 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2022-03-18 03:40:20,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 03:40:20,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-18 03:40:20,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:40:20,979 INFO L225 Difference]: With dead ends: 65 [2022-03-18 03:40:20,980 INFO L226 Difference]: Without dead ends: 50 [2022-03-18 03:40:20,980 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 03:40:20,980 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 03:40:20,981 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 03:40:20,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-18 03:40:20,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-03-18 03:40:20,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 03:40:20,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-18 03:40:20,987 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2022-03-18 03:40:20,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:40:20,987 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-18 03:40:20,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 03:40:20,988 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-18 03:40:20,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 03:40:20,988 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:40:20,988 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:40:21,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 03:40:21,209 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:40:21,209 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:40:21,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:40:21,210 INFO L85 PathProgramCache]: Analyzing trace with hash 214651490, now seen corresponding path program 1 times [2022-03-18 03:40:21,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:21,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1796853039] [2022-03-18 03:40:21,210 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:40:21,210 INFO L85 PathProgramCache]: Analyzing trace with hash 214651490, now seen corresponding path program 2 times [2022-03-18 03:40:21,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:40:21,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552327706] [2022-03-18 03:40:21,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:40:21,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:40:21,219 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:40:21,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109884078] [2022-03-18 03:40:21,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 03:40:21,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:40:21,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:40:21,221 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) [2022-03-18 03:40:21,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 03:40:21,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 03:40:21,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:40:21,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 03:40:21,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:40:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 03:40:21,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:40:21,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:40:21,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552327706] [2022-03-18 03:40:21,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:40:21,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109884078] [2022-03-18 03:40:21,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109884078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:21,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:21,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:40:21,347 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:40:21,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1796853039] [2022-03-18 03:40:21,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1796853039] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:21,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:21,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:40:21,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159547532] [2022-03-18 03:40:21,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:40:21,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 03:40:21,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:21,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 03:40:21,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 03:40:21,348 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 03:40:21,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:40:21,379 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-03-18 03:40:21,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 03:40:21,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-18 03:40:21,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:40:21,381 INFO L225 Difference]: With dead ends: 70 [2022-03-18 03:40:21,381 INFO L226 Difference]: Without dead ends: 63 [2022-03-18 03:40:21,382 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 03:40:21,383 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 03:40:21,383 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 03:40:21,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-18 03:40:21,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-18 03:40:21,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 03:40:21,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-03-18 03:40:21,393 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2022-03-18 03:40:21,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:40:21,394 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-03-18 03:40:21,394 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 03:40:21,394 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-03-18 03:40:21,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 03:40:21,394 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:40:21,394 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:40:21,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 03:40:21,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-18 03:40:21,595 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:40:21,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:40:21,596 INFO L85 PathProgramCache]: Analyzing trace with hash 216379368, now seen corresponding path program 1 times [2022-03-18 03:40:21,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:21,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1888986082] [2022-03-18 03:40:21,597 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:40:21,597 INFO L85 PathProgramCache]: Analyzing trace with hash 216379368, now seen corresponding path program 2 times [2022-03-18 03:40:21,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:40:21,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106009578] [2022-03-18 03:40:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:40:21,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:40:21,608 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:40:21,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246455010] [2022-03-18 03:40:21,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 03:40:21,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:40:21,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:40:21,610 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) [2022-03-18 03:40:21,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 03:40:21,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 03:40:21,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:40:21,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 03:40:21,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:40:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 03:40:21,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:40:21,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:40:21,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106009578] [2022-03-18 03:40:21,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:40:21,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246455010] [2022-03-18 03:40:21,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246455010] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:21,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:21,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:40:21,757 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:40:21,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1888986082] [2022-03-18 03:40:21,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1888986082] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:21,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:21,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:40:21,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019505826] [2022-03-18 03:40:21,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:40:21,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 03:40:21,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:21,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 03:40:21,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 03:40:21,758 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 03:40:21,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:40:21,798 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2022-03-18 03:40:21,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 03:40:21,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-18 03:40:21,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:40:21,799 INFO L225 Difference]: With dead ends: 76 [2022-03-18 03:40:21,799 INFO L226 Difference]: Without dead ends: 64 [2022-03-18 03:40:21,800 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 03:40:21,800 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 03:40:21,800 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 03:40:21,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-18 03:40:21,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-18 03:40:21,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 03:40:21,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-03-18 03:40:21,808 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2022-03-18 03:40:21,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:40:21,808 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-03-18 03:40:21,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 03:40:21,808 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-03-18 03:40:21,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 03:40:21,809 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:40:21,809 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:40:21,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 03:40:22,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:40:22,024 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:40:22,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:40:22,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1255015940, now seen corresponding path program 1 times [2022-03-18 03:40:22,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:22,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2050054137] [2022-03-18 03:40:22,566 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 03:40:22,567 INFO L85 PathProgramCache]: Analyzing trace with hash -861149586, now seen corresponding path program 1 times [2022-03-18 03:40:22,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:40:22,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445704644] [2022-03-18 03:40:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:40:22,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:40:22,572 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:40:22,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786286806] [2022-03-18 03:40:22,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:40:22,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:40:22,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:40:22,573 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) [2022-03-18 03:40:22,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 03:40:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:40:22,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 03:40:22,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:40:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 03:40:22,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:40:22,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:40:22,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445704644] [2022-03-18 03:40:22,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:40:22,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786286806] [2022-03-18 03:40:22,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786286806] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:22,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:22,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:40:22,949 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:40:22,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2050054137] [2022-03-18 03:40:22,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2050054137] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:22,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:22,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 03:40:22,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103510986] [2022-03-18 03:40:22,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:40:22,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 03:40:22,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:22,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 03:40:22,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-18 03:40:22,950 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 03:40:23,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:40:23,924 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2022-03-18 03:40:23,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 03:40:23,925 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 37 [2022-03-18 03:40:23,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:40:23,927 INFO L225 Difference]: With dead ends: 90 [2022-03-18 03:40:23,927 INFO L226 Difference]: Without dead ends: 65 [2022-03-18 03:40:23,927 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-03-18 03:40:23,928 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 03:40:23,928 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 293 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 03:40:23,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-18 03:40:23,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-18 03:40:23,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 03:40:23,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2022-03-18 03:40:23,935 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 37 [2022-03-18 03:40:23,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:40:23,935 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2022-03-18 03:40:23,935 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 03:40:23,935 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2022-03-18 03:40:23,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 03:40:23,936 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:40:23,936 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:40:23,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 03:40:24,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:40:24,144 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:40:24,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:40:24,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1057559728, now seen corresponding path program 1 times [2022-03-18 03:40:24,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:24,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1157617614] [2022-03-18 03:41:46,836 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 03:41:46,836 INFO L85 PathProgramCache]: Analyzing trace with hash 449890654, now seen corresponding path program 1 times [2022-03-18 03:41:46,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:41:46,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917139864] [2022-03-18 03:41:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:41:46,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:41:46,842 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:41:46,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343864536] [2022-03-18 03:41:46,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:41:46,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:41:46,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:41:46,844 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) [2022-03-18 03:41:46,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 03:41:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:41:46,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 03:41:46,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:41:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 03:41:46,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:41:46,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:41:46,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917139864] [2022-03-18 03:41:46,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:41:46,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343864536] [2022-03-18 03:41:46,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343864536] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:41:46,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:41:46,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:41:47,242 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:41:47,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1157617614] [2022-03-18 03:41:47,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1157617614] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:41:47,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:41:47,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 03:41:47,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500479549] [2022-03-18 03:41:47,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:41:47,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 03:41:47,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:41:47,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 03:41:47,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-03-18 03:41:47,244 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 03:41:47,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:41:47,448 INFO L93 Difference]: Finished difference Result 105 states and 137 transitions. [2022-03-18 03:41:47,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 03:41:47,448 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2022-03-18 03:41:47,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:41:47,449 INFO L225 Difference]: With dead ends: 105 [2022-03-18 03:41:47,449 INFO L226 Difference]: Without dead ends: 73 [2022-03-18 03:41:47,450 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-03-18 03:41:47,450 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 03:41:47,451 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 250 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 03:41:47,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-18 03:41:47,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-18 03:41:47,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 03:41:47,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2022-03-18 03:41:47,462 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 40 [2022-03-18 03:41:47,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:41:47,462 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2022-03-18 03:41:47,462 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 03:41:47,463 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2022-03-18 03:41:47,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 03:41:47,467 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:41:47,468 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:41:47,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 03:41:47,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:41:47,676 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:41:47,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:41:47,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1864650262, now seen corresponding path program 2 times [2022-03-18 03:41:47,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:41:47,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1131290923] [2022-03-18 03:41:53,514 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 03:41:53,514 INFO L85 PathProgramCache]: Analyzing trace with hash 237971182, now seen corresponding path program 1 times [2022-03-18 03:41:53,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:41:53,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723319930] [2022-03-18 03:41:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:41:53,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:41:53,528 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:41:53,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944312233] [2022-03-18 03:41:53,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:41:53,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:41:53,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:41:53,532 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) [2022-03-18 03:41:53,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 03:41:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:41:53,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 03:41:53,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:41:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 03:41:53,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:41:53,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:41:53,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723319930] [2022-03-18 03:41:53,616 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:41:53,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944312233] [2022-03-18 03:41:53,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944312233] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:41:53,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:41:53,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:41:54,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:41:54,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1131290923] [2022-03-18 03:41:54,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1131290923] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:41:54,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:41:54,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-18 03:41:54,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449608938] [2022-03-18 03:41:54,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:41:54,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 03:41:54,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:41:54,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 03:41:54,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 03:41:54,288 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 34 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 21 states have internal predecessors, (36), 9 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 03:41:54,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:41:54,961 INFO L93 Difference]: Finished difference Result 114 states and 144 transitions. [2022-03-18 03:41:54,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 03:41:54,961 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 21 states have internal predecessors, (36), 9 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 55 [2022-03-18 03:41:54,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:41:54,962 INFO L225 Difference]: With dead ends: 114 [2022-03-18 03:41:54,962 INFO L226 Difference]: Without dead ends: 89 [2022-03-18 03:41:54,963 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=257, Invalid=1635, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 03:41:54,964 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 47 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 03:41:54,964 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 189 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 03:41:54,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-18 03:41:54,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2022-03-18 03:41:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 51 states have (on average 1.196078431372549) internal successors, (61), 53 states have internal predecessors, (61), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 03:41:54,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2022-03-18 03:41:54,973 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 55 [2022-03-18 03:41:54,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:41:54,973 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2022-03-18 03:41:54,973 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 21 states have internal predecessors, (36), 9 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 03:41:54,974 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2022-03-18 03:41:54,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 03:41:54,974 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:41:54,974 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:41:54,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 03:41:55,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:41:55,189 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:41:55,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:41:55,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1879054090, now seen corresponding path program 2 times [2022-03-18 03:41:55,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:41:55,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [775047229] [2022-03-18 03:42:26,435 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 03:42:26,435 INFO L85 PathProgramCache]: Analyzing trace with hash -473974562, now seen corresponding path program 1 times [2022-03-18 03:42:26,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:42:26,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768297659] [2022-03-18 03:42:26,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:42:26,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:42:26,440 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:42:26,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143252860] [2022-03-18 03:42:26,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:42:26,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:42:26,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:42:26,444 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 03:42:26,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 03:42:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:42:26,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 03:42:26,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:42:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 03:42:26,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:42:26,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:42:26,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768297659] [2022-03-18 03:42:26,553 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:42:26,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143252860] [2022-03-18 03:42:26,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143252860] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:42:26,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:42:26,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:42:28,386 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:42:28,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [775047229] [2022-03-18 03:42:28,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [775047229] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:42:28,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:42:28,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 03:42:28,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189187840] [2022-03-18 03:42:28,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:42:28,387 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 03:42:28,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:42:28,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 03:42:28,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-03-18 03:42:28,388 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 16 states have internal predecessors, (28), 6 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-18 03:42:28,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:42:28,523 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2022-03-18 03:42:28,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 03:42:28,523 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 16 states have internal predecessors, (28), 6 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 58 [2022-03-18 03:42:28,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:42:28,523 INFO L225 Difference]: With dead ends: 82 [2022-03-18 03:42:28,523 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 03:42:28,524 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-03-18 03:42:28,524 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 03:42:28,525 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 76 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 03:42:28,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 03:42:28,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 03:42:28,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 03:42:28,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 03:42:28,525 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 58 [2022-03-18 03:42:28,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:42:28,525 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 03:42:28,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 16 states have internal predecessors, (28), 6 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-18 03:42:28,525 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 03:42:28,525 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 03:42:28,527 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 03:42:28,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-18 03:42:28,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:42:28,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 03:42:32,210 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-03-18 03:42:32,210 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-03-18 03:42:32,211 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-03-18 03:42:32,211 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 11 13) no Hoare annotation was computed. [2022-03-18 03:42:32,211 INFO L882 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-03-18 03:42:32,211 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-03-18 03:42:32,211 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-03-18 03:42:32,211 INFO L878 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (or (and (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:42:32,211 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 23 61) the Hoare annotation is: true [2022-03-18 03:42:32,211 INFO L878 garLoopResultBuilder]: At program point L52(lines 52 55) the Hoare annotation is: (not (<= |old(~counter~0)| 0)) [2022-03-18 03:42:32,211 INFO L878 garLoopResultBuilder]: At program point L52-2(lines 23 61) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:42:32,211 INFO L878 garLoopResultBuilder]: At program point L46(lines 44 56) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:42:32,211 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 23 61) the Hoare annotation is: true [2022-03-18 03:42:32,211 INFO L878 garLoopResultBuilder]: At program point L44(lines 44 56) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:42:32,211 INFO L878 garLoopResultBuilder]: At program point L44-2(lines 44 56) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:42:32,211 INFO L878 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~A~0 main_~r~0) (<= ~counter~0 1) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1))) [2022-03-18 03:42:32,212 INFO L878 garLoopResultBuilder]: At program point L34-1(lines 34 42) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= ~counter~0 (+ |main_#t~post5| 1)) (= main_~A~0 main_~r~0) (<= ~counter~0 1) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1))) [2022-03-18 03:42:32,212 INFO L878 garLoopResultBuilder]: At program point L34-3(lines 34 42) the Hoare annotation is: (let ((.cse0 (= main_~A~0 main_~r~0)) (.cse1 (= main_~q~0 0))) (or (not (<= |old(~counter~0)| 0)) (and (= ~counter~0 |old(~counter~0)|) .cse0 .cse1 (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and (<= 1 main_~B~0) (= (* 2 (* (div (* (- 1) main_~p~0) (- 2)) main_~B~0)) main_~d~0) .cse0 (<= ~counter~0 1) .cse1 (= (mod main_~p~0 2) 0) (<= (* main_~B~0 (div main_~p~0 2)) main_~r~0)))) [2022-03-18 03:42:32,212 INFO L878 garLoopResultBuilder]: At program point mainENTRY(lines 23 61) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:42:32,212 INFO L885 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: true [2022-03-18 03:42:32,212 INFO L878 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:42:32,212 INFO L878 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:42:32,212 INFO L878 garLoopResultBuilder]: At program point L37(lines 34 42) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~A~0 main_~r~0) (<= ~counter~0 1) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1))) [2022-03-18 03:42:32,212 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~A~0 main_~r~0) (<= ~counter~0 1) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1))) [2022-03-18 03:42:32,212 INFO L878 garLoopResultBuilder]: At program point L35-1(line 35) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~A~0 main_~r~0) (<= ~counter~0 1) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1))) [2022-03-18 03:42:32,212 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-03-18 03:42:32,212 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-18 03:42:32,212 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-03-18 03:42:32,212 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-18 03:42:32,212 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-03-18 03:42:32,212 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 03:42:32,212 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-18 03:42:32,213 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-18 03:42:32,213 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (let ((.cse0 (not (= |__VERIFIER_assert_#in~cond| 1))) (.cse1 (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (.cse2 (not (<= ~counter~0 1)))) (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or .cse0 (not (= main_~q~0 0)) .cse1 .cse2) (or .cse0 .cse1 (not (= main_~A~0 main_~r~0)) .cse2) (or .cse0 .cse1 (not (= main_~B~0 main_~d~0)) .cse2 (not (= main_~p~0 1)) (not (= main_~B~0 1))))) [2022-03-18 03:42:32,213 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-03-18 03:42:32,213 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (let ((.cse0 (not (= |__VERIFIER_assert_#in~cond| 1))) (.cse1 (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (.cse2 (not (<= ~counter~0 1)))) (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or .cse0 (not (= main_~q~0 0)) .cse1 .cse2) (or .cse0 .cse1 (not (= main_~A~0 main_~r~0)) .cse2) (or .cse0 .cse1 (not (= main_~B~0 main_~d~0)) .cse2 (not (= main_~p~0 1)) (not (= main_~B~0 1))))) [2022-03-18 03:42:32,213 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (let ((.cse0 (not (= |__VERIFIER_assert_#in~cond| 1))) (.cse1 (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (.cse2 (not (<= ~counter~0 1)))) (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or .cse0 (not (= main_~q~0 0)) .cse1 .cse2) (or .cse0 .cse1 (not (= main_~A~0 main_~r~0)) .cse2) (or .cse0 .cse1 (not (= main_~B~0 main_~d~0)) .cse2 (not (= main_~p~0 1)) (not (= main_~B~0 1))))) [2022-03-18 03:42:32,213 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-18 03:42:32,215 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-03-18 03:42:32,216 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 03:42:32,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 03:42:32 BoogieIcfgContainer [2022-03-18 03:42:32,227 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 03:42:32,227 INFO L158 Benchmark]: Toolchain (without parser) took 133075.76ms. Allocated memory was 195.0MB in the beginning and 270.5MB in the end (delta: 75.5MB). Free memory was 142.7MB in the beginning and 147.1MB in the end (delta: -4.3MB). Peak memory consumption was 70.8MB. Max. memory is 8.0GB. [2022-03-18 03:42:32,227 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 195.0MB. Free memory is still 159.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 03:42:32,228 INFO L158 Benchmark]: CACSL2BoogieTranslator took 168.49ms. Allocated memory was 195.0MB in the beginning and 270.5MB in the end (delta: 75.5MB). Free memory was 142.5MB in the beginning and 244.6MB in the end (delta: -102.0MB). Peak memory consumption was 10.3MB. Max. memory is 8.0GB. [2022-03-18 03:42:32,228 INFO L158 Benchmark]: Boogie Preprocessor took 20.24ms. Allocated memory is still 270.5MB. Free memory was 244.6MB in the beginning and 243.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 03:42:32,228 INFO L158 Benchmark]: RCFGBuilder took 272.98ms. Allocated memory is still 270.5MB. Free memory was 243.0MB in the beginning and 231.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 03:42:32,228 INFO L158 Benchmark]: TraceAbstraction took 132603.53ms. Allocated memory is still 270.5MB. Free memory was 231.0MB in the beginning and 147.1MB in the end (delta: 83.9MB). Peak memory consumption was 84.4MB. Max. memory is 8.0GB. [2022-03-18 03:42:32,229 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 195.0MB. Free memory is still 159.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 168.49ms. Allocated memory was 195.0MB in the beginning and 270.5MB in the end (delta: 75.5MB). Free memory was 142.5MB in the beginning and 244.6MB in the end (delta: -102.0MB). Peak memory consumption was 10.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.24ms. Allocated memory is still 270.5MB. Free memory was 244.6MB in the beginning and 243.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 272.98ms. Allocated memory is still 270.5MB. Free memory was 243.0MB in the beginning and 231.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 132603.53ms. Allocated memory is still 270.5MB. Free memory was 231.0MB in the beginning and 147.1MB in the end (delta: 83.9MB). Peak memory consumption was 84.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 132.5s, OverallIterations: 11, TraceHistogramMax: 9, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 225 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 201 mSDsluCounter, 1458 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1100 mSDsCounter, 203 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1480 IncrementalHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 203 mSolverCounterUnsat, 358 mSDtfsCounter, 1480 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 374 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=10, InterpolantAutomatonStates: 115, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 27 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 31 LocationsWithAnnotation, 403 PreInvPairs, 482 NumberOfFragments, 567 HoareAnnotationTreeSize, 403 FomulaSimplifications, 319 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 31 FomulaSimplificationsInter, 790 FormulaSimplificationTreeSizeReductionInter, 3.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (!(\old(counter) <= 0) || (((((counter == \old(counter) && A == r) && q == 0) && B == 1) && B == d) && p == 1)) || ((((((1 <= B && 2 * (-1 * p / -2 * B) == d) && A == r) && counter <= 1) && q == 0) && p % 2 == 0) && B * (p / 2) <= r) - ProcedureContractResult [Line: 23]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: (((!(1 <= \old(cond)) || 1 <= cond) && (((!(\old(cond) == 1) || !(q == 0)) || \old(cond) == cond) || !(counter <= 1))) && (((!(\old(cond) == 1) || \old(cond) == cond) || !(A == r)) || !(counter <= 1))) && (((((!(\old(cond) == 1) || \old(cond) == cond) || !(B == d)) || !(counter <= 1)) || !(p == 1)) || !(B == 1)) RESULT: Ultimate proved your program to be correct! [2022-03-18 03:42:32,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...