/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de31.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 02:52:33,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 02:52:33,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 02:52:33,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 02:52:33,774 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-31 02:52:33,790 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 02:52:33,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 02:52:33,791 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-31 02:52:33,791 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-31 02:52:33,791 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-31 02:52:33,792 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-31 02:52:33,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-31 02:52:33,792 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-31 02:52:33,792 INFO L138 SettingsManager]: * Use SBE=true [2022-01-31 02:52:33,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 02:52:33,792 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 02:52:33,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 02:52:33,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 02:52:33,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 02:52:33,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 02:52:33,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 02:52:33,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 02:52:33,793 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 02:52:33,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 02:52:33,793 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 02:52:33,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 02:52:33,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 02:52:33,794 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 02:52:33,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 02:52:33,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 02:52:33,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 02:52:33,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-31 02:52:33,794 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-31 02:52:33,795 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 02:52:33,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-31 02:52:33,795 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-31 02:52:33,795 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-31 02:52:33,795 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 02:52:33,795 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 02:52:34,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 02:52:34,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 02:52:34,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 02:52:34,020 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 02:52:34,022 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 02:52:34,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de31.c [2022-01-31 02:52:34,075 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db835d244/dcfdb1d0136e4baf892b1ba6fdb98fe6/FLAGacc28d093 [2022-01-31 02:52:34,427 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 02:52:34,427 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de31.c [2022-01-31 02:52:34,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db835d244/dcfdb1d0136e4baf892b1ba6fdb98fe6/FLAGacc28d093 [2022-01-31 02:52:34,448 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db835d244/dcfdb1d0136e4baf892b1ba6fdb98fe6 [2022-01-31 02:52:34,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 02:52:34,453 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 02:52:34,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 02:52:34,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 02:52:34,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 02:52:34,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:52:34" (1/1) ... [2022-01-31 02:52:34,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60e245cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:52:34, skipping insertion in model container [2022-01-31 02:52:34,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:52:34" (1/1) ... [2022-01-31 02:52:34,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 02:52:34,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 02:52:34,602 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de31.c[368,381] [2022-01-31 02:52:34,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 02:52:34,621 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 02:52:34,630 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de31.c[368,381] [2022-01-31 02:52:34,635 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 02:52:34,666 INFO L208 MainTranslator]: Completed translation [2022-01-31 02:52:34,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:52:34 WrapperNode [2022-01-31 02:52:34,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 02:52:34,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 02:52:34,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 02:52:34,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 02:52:34,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:52:34" (1/1) ... [2022-01-31 02:52:34,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:52:34" (1/1) ... [2022-01-31 02:52:34,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:52:34" (1/1) ... [2022-01-31 02:52:34,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:52:34" (1/1) ... [2022-01-31 02:52:34,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:52:34" (1/1) ... [2022-01-31 02:52:34,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:52:34" (1/1) ... [2022-01-31 02:52:34,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:52:34" (1/1) ... [2022-01-31 02:52:34,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 02:52:34,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 02:52:34,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 02:52:34,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 02:52:34,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:52:34" (1/1) ... [2022-01-31 02:52:34,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 02:52:34,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:52:34,720 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 02:52:34,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 02:52:34,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 02:52:34,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 02:52:34,777 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 02:52:34,778 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 02:52:34,778 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 02:52:34,779 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 02:52:34,779 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 02:52:34,779 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 02:52:34,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 02:52:34,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-01-31 02:52:34,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 02:52:34,779 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 02:52:34,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 02:52:34,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 02:52:34,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 02:52:34,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 02:52:34,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 02:52:34,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 02:52:34,831 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 02:52:34,833 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 02:52:34,936 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 02:52:34,940 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 02:52:34,940 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 02:52:34,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:52:34 BoogieIcfgContainer [2022-01-31 02:52:34,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 02:52:34,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 02:52:34,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 02:52:34,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 02:52:34,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 02:52:34" (1/3) ... [2022-01-31 02:52:34,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bfb8fae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:52:34, skipping insertion in model container [2022-01-31 02:52:34,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:52:34" (2/3) ... [2022-01-31 02:52:34,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bfb8fae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:52:34, skipping insertion in model container [2022-01-31 02:52:34,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:52:34" (3/3) ... [2022-01-31 02:52:34,950 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de31.c [2022-01-31 02:52:34,954 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-31 02:52:34,954 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 02:52:34,996 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 02:52:35,003 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 02:52:35,003 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 02:52:35,026 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 02:52:35,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 02:52:35,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:52:35,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:52:35,030 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:52:35,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:52:35,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1792812365, now seen corresponding path program 1 times [2022-01-31 02:52:35,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:52:35,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3091111] [2022-01-31 02:52:35,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:52:35,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:52:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:35,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:52:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:52:35,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:52:35,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3091111] [2022-01-31 02:52:35,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3091111] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 02:52:35,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 02:52:35,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 02:52:35,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970675469] [2022-01-31 02:52:35,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 02:52:35,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 02:52:35,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:52:35,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 02:52:35,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-31 02:52:35,443 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:52:35,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:52:35,771 INFO L93 Difference]: Finished difference Result 49 states and 68 transitions. [2022-01-31 02:52:35,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 02:52:35,783 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 02:52:35,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:52:35,788 INFO L225 Difference]: With dead ends: 49 [2022-01-31 02:52:35,789 INFO L226 Difference]: Without dead ends: 16 [2022-01-31 02:52:35,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-01-31 02:52:35,794 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 02:52:35,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 49 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 02:52:35,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-31 02:52:35,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-01-31 02:52:35,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2022-01-31 02:52:35,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-01-31 02:52:35,846 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 14 [2022-01-31 02:52:35,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:52:35,846 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-01-31 02:52:35,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:52:35,846 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-01-31 02:52:35,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 02:52:35,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:52:35,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:52:35,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 02:52:35,856 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:52:35,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:52:35,856 INFO L85 PathProgramCache]: Analyzing trace with hash 595464366, now seen corresponding path program 1 times [2022-01-31 02:52:35,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:52:35,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368474799] [2022-01-31 02:52:35,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:52:35,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:52:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:35,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:52:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:52:35,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:52:35,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368474799] [2022-01-31 02:52:35,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368474799] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:52:35,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100377904] [2022-01-31 02:52:35,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:52:35,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:52:35,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:52:35,961 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:52:35,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 02:52:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:36,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 02:52:36,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:52:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:52:36,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:52:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:52:36,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100377904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:52:36,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:52:36,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-01-31 02:52:36,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571135877] [2022-01-31 02:52:36,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:52:36,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 02:52:36,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:52:36,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 02:52:36,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-31 02:52:36,183 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:52:36,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:52:36,354 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-01-31 02:52:36,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 02:52:36,356 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 02:52:36,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:52:36,359 INFO L225 Difference]: With dead ends: 40 [2022-01-31 02:52:36,363 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 02:52:36,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-01-31 02:52:36,370 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:52:36,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 29 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 02:52:36,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 02:52:36,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2022-01-31 02:52:36,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 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) [2022-01-31 02:52:36,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-01-31 02:52:36,378 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2022-01-31 02:52:36,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:52:36,378 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-01-31 02:52:36,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:52:36,378 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-01-31 02:52:36,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 02:52:36,379 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:52:36,379 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:52:36,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 02:52:36,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:52:36,589 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:52:36,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:52:36,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1642511809, now seen corresponding path program 1 times [2022-01-31 02:52:36,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:52:36,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559208155] [2022-01-31 02:52:36,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:52:36,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:52:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:36,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:52:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:52:36,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:52:36,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559208155] [2022-01-31 02:52:36,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559208155] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:52:36,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261633919] [2022-01-31 02:52:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:52:36,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:52:36,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:52:36,926 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:52:36,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 02:52:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:36,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 02:52:36,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:52:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:52:37,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:52:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:52:37,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261633919] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:52:37,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:52:37,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 22 [2022-01-31 02:52:37,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994619258] [2022-01-31 02:52:37,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:52:37,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 02:52:37,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:52:37,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 02:52:37,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-01-31 02:52:37,525 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 19 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:52:39,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:52:39,069 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2022-01-31 02:52:39,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 02:52:39,070 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 19 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 02:52:39,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:52:39,071 INFO L225 Difference]: With dead ends: 56 [2022-01-31 02:52:39,071 INFO L226 Difference]: Without dead ends: 39 [2022-01-31 02:52:39,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=388, Invalid=1868, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 02:52:39,072 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 87 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 02:52:39,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 52 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 02:52:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-31 02:52:39,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 25. [2022-01-31 02:52:39,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 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) [2022-01-31 02:52:39,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-01-31 02:52:39,080 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 17 [2022-01-31 02:52:39,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:52:39,080 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-01-31 02:52:39,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 19 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:52:39,080 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-01-31 02:52:39,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 02:52:39,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:52:39,081 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:52:39,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 02:52:39,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-31 02:52:39,295 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:52:39,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:52:39,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2041345421, now seen corresponding path program 2 times [2022-01-31 02:52:39,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:52:39,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660693908] [2022-01-31 02:52:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:52:39,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:52:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:39,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:52:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:52:39,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:52:39,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660693908] [2022-01-31 02:52:39,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660693908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:52:39,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886159285] [2022-01-31 02:52:39,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 02:52:39,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:52:39,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:52:39,379 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:52:39,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 02:52:39,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 02:52:39,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:52:39,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 02:52:39,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:52:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:52:39,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:52:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:52:39,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886159285] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:52:39,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:52:39,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-31 02:52:39,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677572659] [2022-01-31 02:52:39,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:52:39,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 02:52:39,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:52:39,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 02:52:39,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-01-31 02:52:39,554 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:52:40,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:52:40,390 INFO L93 Difference]: Finished difference Result 78 states and 119 transitions. [2022-01-31 02:52:40,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 02:52:40,391 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 02:52:40,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:52:40,391 INFO L225 Difference]: With dead ends: 78 [2022-01-31 02:52:40,392 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 02:52:40,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=391, Invalid=1091, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 02:52:40,393 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 165 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 02:52:40,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 53 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 02:52:40,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 02:52:40,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 44. [2022-01-31 02:52:40,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 states have internal predecessors, (54), 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) [2022-01-31 02:52:40,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 58 transitions. [2022-01-31 02:52:40,403 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 58 transitions. Word has length 18 [2022-01-31 02:52:40,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:52:40,403 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 58 transitions. [2022-01-31 02:52:40,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:52:40,403 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 58 transitions. [2022-01-31 02:52:40,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 02:52:40,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:52:40,404 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:52:40,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 02:52:40,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:52:40,620 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:52:40,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:52:40,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1675054353, now seen corresponding path program 2 times [2022-01-31 02:52:40,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:52:40,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641142203] [2022-01-31 02:52:40,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:52:40,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:52:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:40,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:52:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 02:52:40,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:52:40,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641142203] [2022-01-31 02:52:40,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641142203] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:52:40,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145909186] [2022-01-31 02:52:40,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 02:52:40,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:52:40,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:52:40,698 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:52:40,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 02:52:40,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 02:52:40,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:52:40,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 02:52:40,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:52:40,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 02:52:40,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:52:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 02:52:40,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145909186] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:52:40,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:52:40,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 14 [2022-01-31 02:52:40,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491304717] [2022-01-31 02:52:40,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:52:40,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 02:52:40,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:52:40,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 02:52:40,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-31 02:52:40,859 INFO L87 Difference]: Start difference. First operand 44 states and 58 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:52:41,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:52:41,114 INFO L93 Difference]: Finished difference Result 72 states and 96 transitions. [2022-01-31 02:52:41,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 02:52:41,114 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 02:52:41,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:52:41,115 INFO L225 Difference]: With dead ends: 72 [2022-01-31 02:52:41,115 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 02:52:41,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-01-31 02:52:41,116 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:52:41,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 49 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 02:52:41,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 02:52:41,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2022-01-31 02:52:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 46 states have internal predecessors, (65), 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) [2022-01-31 02:52:41,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2022-01-31 02:52:41,128 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 19 [2022-01-31 02:52:41,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:52:41,128 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2022-01-31 02:52:41,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:52:41,128 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2022-01-31 02:52:41,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 02:52:41,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:52:41,129 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:52:41,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 02:52:41,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:52:41,346 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:52:41,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:52:41,346 INFO L85 PathProgramCache]: Analyzing trace with hash -854221811, now seen corresponding path program 3 times [2022-01-31 02:52:41,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:52:41,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708799503] [2022-01-31 02:52:41,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:52:41,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:52:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:41,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:52:41,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:52:41,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:52:41,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708799503] [2022-01-31 02:52:41,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708799503] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:52:41,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102691587] [2022-01-31 02:52:41,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 02:52:41,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:52:41,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:52:41,609 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:52:41,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 02:52:41,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 02:52:41,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:52:41,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-31 02:52:41,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:52:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:52:41,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:52:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:52:42,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102691587] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:52:42,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:52:42,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 23 [2022-01-31 02:52:42,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411998397] [2022-01-31 02:52:42,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:52:42,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 02:52:42,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:52:42,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 02:52:42,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-01-31 02:52:42,307 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 20 states have internal predecessors, (34), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:52:44,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:52:44,517 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2022-01-31 02:52:44,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 02:52:44,518 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 20 states have internal predecessors, (34), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 02:52:44,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:52:44,518 INFO L225 Difference]: With dead ends: 93 [2022-01-31 02:52:44,518 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 02:52:44,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=311, Invalid=1945, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 02:52:44,520 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 64 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 02:52:44,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 80 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 02:52:44,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 02:52:44,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2022-01-31 02:52:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.391304347826087) internal successors, (64), 46 states have internal predecessors, (64), 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) [2022-01-31 02:52:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2022-01-31 02:52:44,540 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 20 [2022-01-31 02:52:44,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:52:44,541 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2022-01-31 02:52:44,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 20 states have internal predecessors, (34), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:52:44,541 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2022-01-31 02:52:44,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 02:52:44,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:52:44,542 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:52:44,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-31 02:52:44,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:52:44,756 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:52:44,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:52:44,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1752036735, now seen corresponding path program 4 times [2022-01-31 02:52:44,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:52:44,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37712392] [2022-01-31 02:52:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:52:44,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:52:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:44,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:52:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 02:52:44,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:52:44,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37712392] [2022-01-31 02:52:44,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37712392] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:52:44,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978367119] [2022-01-31 02:52:44,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 02:52:44,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:52:44,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:52:44,860 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:52:44,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 02:52:44,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 02:52:44,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:52:44,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 02:52:44,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:52:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 02:52:44,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:52:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 02:52:45,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978367119] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:52:45,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:52:45,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 19 [2022-01-31 02:52:45,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129530877] [2022-01-31 02:52:45,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:52:45,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 02:52:45,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:52:45,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 02:52:45,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-31 02:52:45,114 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:52:45,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:52:45,607 INFO L93 Difference]: Finished difference Result 84 states and 112 transitions. [2022-01-31 02:52:45,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 02:52:45,608 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 02:52:45,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:52:45,608 INFO L225 Difference]: With dead ends: 84 [2022-01-31 02:52:45,608 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 02:52:45,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 02:52:45,610 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:52:45,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 56 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 02:52:45,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 02:52:45,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2022-01-31 02:52:45,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 states have internal predecessors, (70), 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) [2022-01-31 02:52:45,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2022-01-31 02:52:45,624 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 22 [2022-01-31 02:52:45,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:52:45,624 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2022-01-31 02:52:45,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:52:45,625 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2022-01-31 02:52:45,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 02:52:45,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:52:45,625 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:52:45,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 02:52:45,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:52:45,839 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:52:45,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:52:45,840 INFO L85 PathProgramCache]: Analyzing trace with hash 310755198, now seen corresponding path program 5 times [2022-01-31 02:52:45,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:52:45,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369319333] [2022-01-31 02:52:45,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:52:45,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:52:45,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:45,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:52:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:45,966 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 02:52:45,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:52:45,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369319333] [2022-01-31 02:52:45,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369319333] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:52:45,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146853598] [2022-01-31 02:52:45,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 02:52:45,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:52:45,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:52:45,968 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) [2022-01-31 02:52:45,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 02:52:46,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 02:52:46,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:52:46,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-31 02:52:46,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:52:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 02:52:46,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:52:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 02:52:46,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146853598] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:52:46,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:52:46,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-01-31 02:52:46,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076647049] [2022-01-31 02:52:46,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:52:46,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 02:52:46,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:52:46,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 02:52:46,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-31 02:52:46,228 INFO L87 Difference]: Start difference. First operand 56 states and 74 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:52:51,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:52:51,079 INFO L93 Difference]: Finished difference Result 154 states and 223 transitions. [2022-01-31 02:52:51,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 02:52:51,079 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 02:52:51,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:52:51,080 INFO L225 Difference]: With dead ends: 154 [2022-01-31 02:52:51,080 INFO L226 Difference]: Without dead ends: 144 [2022-01-31 02:52:51,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1701, Invalid=5271, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 02:52:51,082 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 261 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 02:52:51,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 86 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 02:52:51,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-31 02:52:51,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 76. [2022-01-31 02:52:51,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.3943661971830985) internal successors, (99), 71 states have internal predecessors, (99), 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) [2022-01-31 02:52:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 103 transitions. [2022-01-31 02:52:51,102 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 103 transitions. Word has length 22 [2022-01-31 02:52:51,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:52:51,102 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 103 transitions. [2022-01-31 02:52:51,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:52:51,102 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 103 transitions. [2022-01-31 02:52:51,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 02:52:51,103 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:52:51,103 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:52:51,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 02:52:51,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:52:51,314 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:52:51,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:52:51,314 INFO L85 PathProgramCache]: Analyzing trace with hash 142103551, now seen corresponding path program 6 times [2022-01-31 02:52:51,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:52:51,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601732672] [2022-01-31 02:52:51,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:52:51,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:52:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:51,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:52:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:52:51,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:52:51,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601732672] [2022-01-31 02:52:51,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601732672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:52:51,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123903197] [2022-01-31 02:52:51,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 02:52:51,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:52:51,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:52:51,648 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:52:51,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 02:52:51,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-31 02:52:51,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:52:51,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-31 02:52:51,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:52:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:52:52,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:52:52,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:52:52,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123903197] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:52:52,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:52:52,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 13] total 32 [2022-01-31 02:52:52,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305186528] [2022-01-31 02:52:52,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:52:52,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 02:52:52,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:52:52,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 02:52:52,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2022-01-31 02:52:52,565 INFO L87 Difference]: Start difference. First operand 76 states and 103 transitions. Second operand has 32 states, 32 states have (on average 1.40625) internal successors, (45), 29 states have internal predecessors, (45), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:52:56,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:52:56,432 INFO L93 Difference]: Finished difference Result 126 states and 161 transitions. [2022-01-31 02:52:56,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 02:52:56,432 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.40625) internal successors, (45), 29 states have internal predecessors, (45), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 02:52:56,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:52:56,433 INFO L225 Difference]: With dead ends: 126 [2022-01-31 02:52:56,433 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 02:52:56,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=456, Invalid=3450, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 02:52:56,434 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 67 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 02:52:56,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 86 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 02:52:56,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 02:52:56,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2022-01-31 02:52:56,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.3714285714285714) internal successors, (96), 70 states have internal predecessors, (96), 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) [2022-01-31 02:52:56,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 100 transitions. [2022-01-31 02:52:56,455 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 100 transitions. Word has length 23 [2022-01-31 02:52:56,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:52:56,455 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 100 transitions. [2022-01-31 02:52:56,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.40625) internal successors, (45), 29 states have internal predecessors, (45), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:52:56,456 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 100 transitions. [2022-01-31 02:52:56,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 02:52:56,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:52:56,456 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:52:56,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 02:52:56,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-31 02:52:56,671 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:52:56,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:52:56,672 INFO L85 PathProgramCache]: Analyzing trace with hash -2034209681, now seen corresponding path program 7 times [2022-01-31 02:52:56,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:52:56,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379954549] [2022-01-31 02:52:56,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:52:56,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:52:56,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:56,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:52:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 02:52:56,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:52:56,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379954549] [2022-01-31 02:52:56,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379954549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:52:56,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951366738] [2022-01-31 02:52:56,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 02:52:56,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:52:56,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:52:56,768 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:52:56,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 02:52:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:56,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 02:52:56,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:52:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 02:52:56,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:52:57,078 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 02:52:57,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951366738] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:52:57,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:52:57,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-01-31 02:52:57,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614035221] [2022-01-31 02:52:57,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:52:57,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 02:52:57,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:52:57,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 02:52:57,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-01-31 02:52:57,080 INFO L87 Difference]: Start difference. First operand 75 states and 100 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:52:57,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:52:57,897 INFO L93 Difference]: Finished difference Result 119 states and 160 transitions. [2022-01-31 02:52:57,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 02:52:57,900 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 02:52:57,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:52:57,901 INFO L225 Difference]: With dead ends: 119 [2022-01-31 02:52:57,901 INFO L226 Difference]: Without dead ends: 100 [2022-01-31 02:52:57,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=304, Invalid=1858, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 02:52:57,902 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 02:52:57,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 84 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 02:52:57,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-31 02:52:57,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2022-01-31 02:52:57,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.3766233766233766) internal successors, (106), 77 states have internal predecessors, (106), 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) [2022-01-31 02:52:57,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 110 transitions. [2022-01-31 02:52:57,923 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 110 transitions. Word has length 25 [2022-01-31 02:52:57,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:52:57,923 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 110 transitions. [2022-01-31 02:52:57,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:52:57,923 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 110 transitions. [2022-01-31 02:52:57,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 02:52:57,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:52:57,924 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:52:57,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-31 02:52:58,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 02:52:58,148 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:52:58,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:52:58,148 INFO L85 PathProgramCache]: Analyzing trace with hash 359277261, now seen corresponding path program 8 times [2022-01-31 02:52:58,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:52:58,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548354277] [2022-01-31 02:52:58,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:52:58,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:52:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:58,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:52:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:52:58,551 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:52:58,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:52:58,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548354277] [2022-01-31 02:52:58,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548354277] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:52:58,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831102631] [2022-01-31 02:52:58,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 02:52:58,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:52:58,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:52:58,553 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:52:58,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 02:52:58,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 02:52:58,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:52:58,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-31 02:52:58,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:52:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:52:59,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:53:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:53:00,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831102631] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:53:00,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:53:00,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 15] total 36 [2022-01-31 02:53:00,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627263105] [2022-01-31 02:53:00,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:53:00,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 02:53:00,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:53:00,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 02:53:00,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 02:53:00,725 INFO L87 Difference]: Start difference. First operand 82 states and 110 transitions. Second operand has 36 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:53:02,457 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 02:53:03,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 02:53:06,313 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 02:53:17,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:53:17,808 INFO L93 Difference]: Finished difference Result 140 states and 178 transitions. [2022-01-31 02:53:17,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 02:53:17,808 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 02:53:17,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:53:17,809 INFO L225 Difference]: With dead ends: 140 [2022-01-31 02:53:17,809 INFO L226 Difference]: Without dead ends: 105 [2022-01-31 02:53:17,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=583, Invalid=4819, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 02:53:17,811 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 88 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 96 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-01-31 02:53:17,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 98 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 628 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2022-01-31 02:53:17,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-31 02:53:17,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 76. [2022-01-31 02:53:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.3943661971830985) internal successors, (99), 71 states have internal predecessors, (99), 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) [2022-01-31 02:53:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 103 transitions. [2022-01-31 02:53:17,839 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 103 transitions. Word has length 26 [2022-01-31 02:53:17,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:53:17,840 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 103 transitions. [2022-01-31 02:53:17,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:53:17,840 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 103 transitions. [2022-01-31 02:53:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 02:53:17,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:53:17,841 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:53:17,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 02:53:18,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 02:53:18,048 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:53:18,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:53:18,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1955077522, now seen corresponding path program 9 times [2022-01-31 02:53:18,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:53:18,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519593469] [2022-01-31 02:53:18,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:53:18,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:53:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:53:18,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:53:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:53:18,246 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 02:53:18,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:53:18,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519593469] [2022-01-31 02:53:18,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519593469] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:53:18,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397383046] [2022-01-31 02:53:18,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 02:53:18,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:53:18,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:53:18,247 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:53:18,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 02:53:18,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 02:53:18,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:53:18,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 02:53:18,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:53:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-31 02:53:18,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:53:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-31 02:53:18,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397383046] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:53:18,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:53:18,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 25 [2022-01-31 02:53:18,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70777546] [2022-01-31 02:53:18,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:53:18,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 02:53:18,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:53:18,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 02:53:18,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-31 02:53:18,490 INFO L87 Difference]: Start difference. First operand 76 states and 103 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:53:19,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:53:19,592 INFO L93 Difference]: Finished difference Result 128 states and 172 transitions. [2022-01-31 02:53:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 02:53:19,593 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 02:53:19,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:53:19,594 INFO L225 Difference]: With dead ends: 128 [2022-01-31 02:53:19,594 INFO L226 Difference]: Without dead ends: 114 [2022-01-31 02:53:19,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=649, Invalid=3011, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 02:53:19,596 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 108 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 02:53:19,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 99 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 02:53:19,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-31 02:53:19,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 83. [2022-01-31 02:53:19,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.294871794871795) internal successors, (101), 78 states have internal predecessors, (101), 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) [2022-01-31 02:53:19,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2022-01-31 02:53:19,631 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 27 [2022-01-31 02:53:19,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:53:19,631 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2022-01-31 02:53:19,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:53:19,631 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2022-01-31 02:53:19,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 02:53:19,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:53:19,632 INFO L514 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:53:19,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 02:53:19,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 02:53:19,847 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:53:19,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:53:19,848 INFO L85 PathProgramCache]: Analyzing trace with hash 867538926, now seen corresponding path program 3 times [2022-01-31 02:53:19,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:53:19,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33537847] [2022-01-31 02:53:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:53:19,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:53:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:53:20,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:53:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:53:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:53:20,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:53:20,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33537847] [2022-01-31 02:53:20,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33537847] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:53:20,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485011695] [2022-01-31 02:53:20,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 02:53:20,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:53:20,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:53:20,030 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:53:20,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 02:53:20,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-31 02:53:20,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:53:20,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-31 02:53:20,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:53:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:53:20,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:53:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:53:20,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485011695] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:53:20,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:53:20,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-01-31 02:53:20,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297581534] [2022-01-31 02:53:20,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:53:20,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 02:53:20,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:53:20,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 02:53:20,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 02:53:20,587 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 34 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 33 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:53:45,741 WARN L228 SmtUtils]: Spent 7.51s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 02:54:36,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:54:36,235 INFO L93 Difference]: Finished difference Result 399 states and 542 transitions. [2022-01-31 02:54:36,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 02:54:36,236 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 33 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 02:54:36,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:54:36,237 INFO L225 Difference]: With dead ends: 399 [2022-01-31 02:54:36,238 INFO L226 Difference]: Without dead ends: 371 [2022-01-31 02:54:36,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2586 ImplicationChecksByTransitivity, 73.8s TimeCoverageRelationStatistics Valid=2476, Invalid=7226, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 02:54:36,242 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 937 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:54:36,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [937 Valid, 110 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 02:54:36,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-01-31 02:54:36,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 122. [2022-01-31 02:54:36,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.3418803418803418) internal successors, (157), 117 states have internal predecessors, (157), 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) [2022-01-31 02:54:36,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 161 transitions. [2022-01-31 02:54:36,280 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 161 transitions. Word has length 27 [2022-01-31 02:54:36,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:54:36,280 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 161 transitions. [2022-01-31 02:54:36,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 33 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:54:36,281 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 161 transitions. [2022-01-31 02:54:36,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 02:54:36,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:54:36,281 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:54:36,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 02:54:36,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 02:54:36,487 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:54:36,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:54:36,488 INFO L85 PathProgramCache]: Analyzing trace with hash -603591809, now seen corresponding path program 10 times [2022-01-31 02:54:36,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:54:36,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013740469] [2022-01-31 02:54:36,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:54:36,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:54:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:54:36,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:54:36,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:54:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 02:54:36,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:54:36,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013740469] [2022-01-31 02:54:36,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013740469] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:54:36,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572738182] [2022-01-31 02:54:36,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 02:54:36,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:54:36,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:54:36,625 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:54:36,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 02:54:36,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 02:54:36,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:54:36,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 02:54:36,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:54:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 02:54:36,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:54:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 02:54:37,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572738182] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:54:37,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:54:37,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 29 [2022-01-31 02:54:37,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898325137] [2022-01-31 02:54:37,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:54:37,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 02:54:37,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:54:37,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 02:54:37,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-01-31 02:54:37,030 INFO L87 Difference]: Start difference. First operand 122 states and 161 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:54:38,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:54:38,222 INFO L93 Difference]: Finished difference Result 209 states and 264 transitions. [2022-01-31 02:54:38,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 02:54:38,223 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 02:54:38,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:54:38,223 INFO L225 Difference]: With dead ends: 209 [2022-01-31 02:54:38,223 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 02:54:38,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=405, Invalid=2787, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 02:54:38,225 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 02:54:38,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 89 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 02:54:38,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 02:54:38,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 136. [2022-01-31 02:54:38,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.3206106870229009) internal successors, (173), 131 states have internal predecessors, (173), 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) [2022-01-31 02:54:38,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 177 transitions. [2022-01-31 02:54:38,268 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 177 transitions. Word has length 28 [2022-01-31 02:54:38,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:54:38,268 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 177 transitions. [2022-01-31 02:54:38,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:54:38,268 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 177 transitions. [2022-01-31 02:54:38,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 02:54:38,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:54:38,269 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:54:38,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-31 02:54:38,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 02:54:38,483 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:54:38,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:54:38,484 INFO L85 PathProgramCache]: Analyzing trace with hash 646714815, now seen corresponding path program 11 times [2022-01-31 02:54:38,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:54:38,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766886974] [2022-01-31 02:54:38,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:54:38,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:54:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:54:38,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:54:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:54:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:54:38,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:54:38,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766886974] [2022-01-31 02:54:38,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766886974] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:54:38,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922122657] [2022-01-31 02:54:38,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 02:54:38,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:54:38,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:54:38,969 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:54:38,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 02:54:39,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 02:54:39,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:54:39,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-31 02:54:39,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:54:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:54:39,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:54:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:54:43,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922122657] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:54:43,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:54:43,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 37 [2022-01-31 02:54:43,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077615623] [2022-01-31 02:54:43,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:54:43,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 02:54:43,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:54:43,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 02:54:43,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1191, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 02:54:43,777 INFO L87 Difference]: Start difference. First operand 136 states and 177 transitions. Second operand has 37 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 34 states have internal predecessors, (54), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:54:45,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 02:55:01,831 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 02:55:17,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:55:17,711 INFO L93 Difference]: Finished difference Result 211 states and 257 transitions. [2022-01-31 02:55:17,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 02:55:17,712 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 34 states have internal predecessors, (54), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 02:55:17,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:55:17,713 INFO L225 Difference]: With dead ends: 211 [2022-01-31 02:55:17,713 INFO L226 Difference]: Without dead ends: 179 [2022-01-31 02:55:17,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 32.8s TimeCoverageRelationStatistics Valid=630, Invalid=5530, Unknown=2, NotChecked=0, Total=6162 [2022-01-31 02:55:17,715 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 79 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 105 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-01-31 02:55:17,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 124 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 701 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2022-01-31 02:55:17,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-31 02:55:17,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 124. [2022-01-31 02:55:17,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.3277310924369747) internal successors, (158), 119 states have internal predecessors, (158), 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) [2022-01-31 02:55:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 162 transitions. [2022-01-31 02:55:17,756 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 162 transitions. Word has length 29 [2022-01-31 02:55:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:55:17,756 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 162 transitions. [2022-01-31 02:55:17,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 34 states have internal predecessors, (54), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:55:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 162 transitions. [2022-01-31 02:55:17,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 02:55:17,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:55:17,757 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:55:17,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 02:55:17,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:55:17,961 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:55:17,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:55:17,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1363427330, now seen corresponding path program 12 times [2022-01-31 02:55:17,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:55:17,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998651415] [2022-01-31 02:55:17,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:55:17,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:55:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:55:18,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:55:18,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:55:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 02:55:18,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:55:18,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998651415] [2022-01-31 02:55:18,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998651415] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:55:18,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556814557] [2022-01-31 02:55:18,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 02:55:18,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:55:18,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:55:18,194 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:55:18,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 02:55:18,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-31 02:55:18,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:55:18,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-31 02:55:18,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:55:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 02:55:18,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:55:18,905 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 02:55:18,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556814557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:55:18,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:55:18,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-01-31 02:55:18,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934160304] [2022-01-31 02:55:18,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:55:18,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 02:55:18,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:55:18,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 02:55:18,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1102, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 02:55:18,908 INFO L87 Difference]: Start difference. First operand 124 states and 162 transitions. Second operand has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 37 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:55:35,886 WARN L228 SmtUtils]: Spent 9.86s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 02:55:45,770 WARN L228 SmtUtils]: Spent 5.21s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 02:55:58,933 WARN L228 SmtUtils]: Spent 7.94s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 02:56:09,511 WARN L228 SmtUtils]: Spent 5.17s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 02:56:21,037 WARN L228 SmtUtils]: Spent 7.96s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 02:56:32,457 WARN L228 SmtUtils]: Spent 9.32s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 02:56:48,560 WARN L228 SmtUtils]: Spent 9.22s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 02:57:09,521 WARN L228 SmtUtils]: Spent 7.27s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 02:57:18,956 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ 2 c_main_~y~0) 4294967296)) (< 0 (mod (+ 4294967295 c_main_~z~0) 4294967296)) (= |c_#NULL.base| |c_old(#NULL.base)|) (< 0 (mod c_main_~y~0 4294967296)) (< 0 (mod (+ 3 c_main_~y~0) 4294967296)) (< 0 (mod (+ c_main_~y~0 1) 4294967296)) (< 0 (mod (+ 4294967295 c_main_~y~0) 4294967296)) (< 0 (mod (+ 8 c_main_~y~0) 4294967296)) (< 0 (mod c_main_~z~0 4294967296)) (< 0 (mod (+ 6 c_main_~y~0) 4294967296)) (< 0 (mod (+ 5 c_main_~y~0) 4294967296)) (< 0 (mod (+ 4 c_main_~y~0) 4294967296)) (< 0 (mod (+ 9 c_main_~y~0) 4294967296)) (< 0 (mod (+ 10 c_main_~y~0) 4294967296)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (< 0 (mod (+ 7 c_main_~y~0) 4294967296))) is different from false [2022-01-31 02:57:32,172 WARN L228 SmtUtils]: Spent 5.64s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 02:59:05,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:59:05,098 INFO L93 Difference]: Finished difference Result 442 states and 584 transitions. [2022-01-31 02:59:05,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 02:59:05,098 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 37 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 02:59:05,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:59:05,099 INFO L225 Difference]: With dead ends: 442 [2022-01-31 02:59:05,099 INFO L226 Difference]: Without dead ends: 424 [2022-01-31 02:59:05,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10185 ImplicationChecksByTransitivity, 221.3s TimeCoverageRelationStatistics Valid=6655, Invalid=21068, Unknown=3, NotChecked=330, Total=28056 [2022-01-31 02:59:05,104 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 758 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 838 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 2228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 838 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-01-31 02:59:05,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 126 Invalid, 2228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [838 Valid, 1389 Invalid, 0 Unknown, 1 Unchecked, 5.2s Time] [2022-01-31 02:59:05,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-01-31 02:59:05,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 137. [2022-01-31 02:59:05,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.3257575757575757) internal successors, (175), 132 states have internal predecessors, (175), 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) [2022-01-31 02:59:05,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 179 transitions. [2022-01-31 02:59:05,153 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 179 transitions. Word has length 30 [2022-01-31 02:59:05,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:59:05,153 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 179 transitions. [2022-01-31 02:59:05,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 37 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:59:05,154 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 179 transitions. [2022-01-31 02:59:05,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 02:59:05,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:59:05,154 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:59:05,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 02:59:05,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 02:59:05,358 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:59:05,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:59:05,359 INFO L85 PathProgramCache]: Analyzing trace with hash -2100427281, now seen corresponding path program 13 times [2022-01-31 02:59:05,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:59:05,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987186505] [2022-01-31 02:59:05,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:59:05,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:59:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:59:05,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:59:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:59:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 02:59:05,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:59:05,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987186505] [2022-01-31 02:59:05,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987186505] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:59:05,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601346236] [2022-01-31 02:59:05,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 02:59:05,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:59:05,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:59:05,536 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:59:05,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 02:59:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:59:05,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-31 02:59:05,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:59:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 02:59:05,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:59:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 02:59:06,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601346236] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:59:06,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:59:06,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 34 [2022-01-31 02:59:06,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678775574] [2022-01-31 02:59:06,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:59:06,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 02:59:06,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:59:06,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 02:59:06,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 02:59:06,034 INFO L87 Difference]: Start difference. First operand 137 states and 179 transitions. Second operand has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:59:08,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:59:08,226 INFO L93 Difference]: Finished difference Result 242 states and 303 transitions. [2022-01-31 02:59:08,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 02:59:08,226 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 02:59:08,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:59:08,227 INFO L225 Difference]: With dead ends: 242 [2022-01-31 02:59:08,227 INFO L226 Difference]: Without dead ends: 179 [2022-01-31 02:59:08,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=518, Invalid=3904, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 02:59:08,228 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 02:59:08,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 104 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 02:59:08,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-31 02:59:08,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 153. [2022-01-31 02:59:08,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.304054054054054) internal successors, (193), 148 states have internal predecessors, (193), 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) [2022-01-31 02:59:08,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 197 transitions. [2022-01-31 02:59:08,318 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 197 transitions. Word has length 31 [2022-01-31 02:59:08,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:59:08,319 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 197 transitions. [2022-01-31 02:59:08,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:59:08,319 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 197 transitions. [2022-01-31 02:59:08,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 02:59:08,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:59:08,319 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:59:08,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 02:59:08,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-31 02:59:08,526 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:59:08,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:59:08,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1375844749, now seen corresponding path program 14 times [2022-01-31 02:59:08,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:59:08,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378859950] [2022-01-31 02:59:08,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:59:08,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:59:08,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:59:09,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:59:09,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:59:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:59:09,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:59:09,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378859950] [2022-01-31 02:59:09,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378859950] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:59:09,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968147198] [2022-01-31 02:59:09,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 02:59:09,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:59:09,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:59:09,159 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:59:09,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 02:59:09,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 02:59:09,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:59:09,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 59 conjunts are in the unsatisfiable core [2022-01-31 02:59:09,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:59:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:59:09,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:59:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:59:13,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968147198] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:59:13,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:59:13,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 43 [2022-01-31 02:59:13,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124809057] [2022-01-31 02:59:13,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:59:13,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 02:59:13,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:59:13,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 02:59:13,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 02:59:13,577 INFO L87 Difference]: Start difference. First operand 153 states and 197 transitions. Second operand has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 40 states have internal predecessors, (62), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:59:49,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:59:49,309 INFO L93 Difference]: Finished difference Result 246 states and 296 transitions. [2022-01-31 02:59:49,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 02:59:49,310 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 40 states have internal predecessors, (62), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 02:59:49,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:59:49,311 INFO L225 Difference]: With dead ends: 246 [2022-01-31 02:59:49,311 INFO L226 Difference]: Without dead ends: 210 [2022-01-31 02:59:49,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 37.2s TimeCoverageRelationStatistics Valid=776, Invalid=7410, Unknown=4, NotChecked=0, Total=8190 [2022-01-31 02:59:49,312 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 02:59:49,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 124 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 02:59:49,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-01-31 02:59:49,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 139. [2022-01-31 02:59:49,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.3134328358208955) internal successors, (176), 134 states have internal predecessors, (176), 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) [2022-01-31 02:59:49,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 180 transitions. [2022-01-31 02:59:49,371 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 180 transitions. Word has length 32 [2022-01-31 02:59:49,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:59:49,371 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 180 transitions. [2022-01-31 02:59:49,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 40 states have internal predecessors, (62), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:59:49,371 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 180 transitions. [2022-01-31 02:59:49,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 02:59:49,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:59:49,372 INFO L514 BasicCegarLoop]: trace histogram [15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:59:49,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 02:59:49,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 02:59:49,574 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:59:49,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:59:49,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1705192978, now seen corresponding path program 15 times [2022-01-31 02:59:49,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:59:49,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652693650] [2022-01-31 02:59:49,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:59:49,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:59:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:59:49,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:59:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:59:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 02:59:49,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:59:49,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652693650] [2022-01-31 02:59:49,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652693650] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:59:49,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092911922] [2022-01-31 02:59:49,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 02:59:49,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:59:49,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:59:49,855 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:59:49,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 02:59:50,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-31 02:59:50,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:59:50,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-31 02:59:50,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:59:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 02:59:50,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:59:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 02:59:50,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092911922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:59:50,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:59:50,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-01-31 02:59:50,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120272570] [2022-01-31 02:59:50,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:59:50,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 02:59:50,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:59:50,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 02:59:50,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1373, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 02:59:50,838 INFO L87 Difference]: Start difference. First operand 139 states and 180 transitions. Second operand has 42 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 41 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:15,858 WARN L228 SmtUtils]: Spent 14.10s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:00:29,595 WARN L228 SmtUtils]: Spent 5.48s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:00:31,760 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ 2 c_main_~y~0) 4294967296)) (< 0 (mod (+ 4294967295 c_main_~z~0) 4294967296)) (= |c_#NULL.base| |c_old(#NULL.base)|) (< 0 (mod (+ 4294967294 c_main_~z~0) 4294967296)) (< 0 (mod (+ 11 c_main_~y~0) 4294967296)) (< 0 (mod c_main_~y~0 4294967296)) (< 0 (mod (+ 4294967294 c_main_~y~0) 4294967296)) (< 0 (mod (+ 13 c_main_~y~0) 4294967296)) (< 0 (mod (+ 3 c_main_~y~0) 4294967296)) (< 0 (mod (+ c_main_~y~0 1) 4294967296)) (< 0 (mod (+ 4294967295 c_main_~y~0) 4294967296)) (< 0 (mod (+ 8 c_main_~y~0) 4294967296)) (< 0 (mod c_main_~z~0 4294967296)) (< 0 (mod (+ 6 c_main_~y~0) 4294967296)) (< 0 (mod (+ 5 c_main_~y~0) 4294967296)) (< 0 (mod (+ 4 c_main_~y~0) 4294967296)) (< 0 (mod (+ 9 c_main_~y~0) 4294967296)) (< 0 (mod (+ 10 c_main_~y~0) 4294967296)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (< 0 (mod (+ 7 c_main_~y~0) 4294967296)) (< 0 (mod (+ 12 c_main_~y~0) 4294967296))) is different from false [2022-01-31 03:01:07,887 WARN L228 SmtUtils]: Spent 15.00s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:01:35,203 WARN L228 SmtUtils]: Spent 11.53s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:01:51,893 WARN L228 SmtUtils]: Spent 9.56s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:02:15,938 WARN L228 SmtUtils]: Spent 9.58s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:02:27,615 WARN L228 SmtUtils]: Spent 5.52s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:02:40,492 WARN L228 SmtUtils]: Spent 7.19s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:03:29,219 WARN L228 SmtUtils]: Spent 10.45s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:03:40,702 WARN L228 SmtUtils]: Spent 6.78s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:03:55,414 WARN L228 SmtUtils]: Spent 5.24s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:04:12,432 WARN L228 SmtUtils]: Spent 7.56s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:04:26,051 WARN L228 SmtUtils]: Spent 7.74s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:05:16,116 WARN L228 SmtUtils]: Spent 7.39s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)