/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-5d317bd [2022-03-18 12:34:59,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 12:34:59,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 12:34:59,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 12:34:59,614 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 [2022-03-18 12:34:59,631 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 12:34:59,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 12:34:59,632 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 12:34:59,632 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 12:34:59,633 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 12:34:59,633 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 12:34:59,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 12:34:59,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 12:34:59,633 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 12:34:59,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 12:34:59,634 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 12:34:59,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 12:34:59,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 12:34:59,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 12:34:59,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 12:34:59,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 12:34:59,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 12:34:59,635 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 12:34:59,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 12:34:59,635 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 12:34:59,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 12:34:59,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 12:34:59,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 12:34:59,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 12:34:59,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 12:34:59,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 12:34:59,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 12:34:59,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 12:34:59,636 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 12:34:59,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 12:34:59,636 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 12:34:59,636 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 12:34:59,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 12:34:59,637 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 12:34:59,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 12:34:59,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 12:34:59,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 12:34:59,868 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 12:34:59,869 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 12:34:59,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de31.c [2022-03-18 12:34:59,928 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5020ac8a/264b1bb621bf492b8099a096393b2bb2/FLAG35ef594bd [2022-03-18 12:35:00,326 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 12:35:00,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de31.c [2022-03-18 12:35:00,330 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5020ac8a/264b1bb621bf492b8099a096393b2bb2/FLAG35ef594bd [2022-03-18 12:35:00,737 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5020ac8a/264b1bb621bf492b8099a096393b2bb2 [2022-03-18 12:35:00,740 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 12:35:00,741 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 12:35:00,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 12:35:00,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 12:35:00,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 12:35:00,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:35:00" (1/1) ... [2022-03-18 12:35:00,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56f5709a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:35:00, skipping insertion in model container [2022-03-18 12:35:00,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:35:00" (1/1) ... [2022-03-18 12:35:00,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 12:35:00,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 12:35:00,891 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] [2022-03-18 12:35:00,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 12:35:00,926 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 12:35:00,938 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] [2022-03-18 12:35:00,941 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 12:35:00,952 INFO L208 MainTranslator]: Completed translation [2022-03-18 12:35:00,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:35:00 WrapperNode [2022-03-18 12:35:00,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 12:35:00,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 12:35:00,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 12:35:00,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 12:35:00,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:35:00" (1/1) ... [2022-03-18 12:35:00,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:35:00" (1/1) ... [2022-03-18 12:35:00,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:35:00" (1/1) ... [2022-03-18 12:35:00,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:35:00" (1/1) ... [2022-03-18 12:35:00,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:35:00" (1/1) ... [2022-03-18 12:35:00,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:35:00" (1/1) ... [2022-03-18 12:35:00,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:35:00" (1/1) ... [2022-03-18 12:35:00,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 12:35:00,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 12:35:00,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 12:35:00,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 12:35:00,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:35:00" (1/1) ... [2022-03-18 12:35:00,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 12:35:00,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:35:01,009 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 12:35:01,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 12:35:01,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 12:35:01,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 12:35:01,048 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 12:35:01,049 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 12:35:01,050 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 12:35:01,050 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 12:35:01,050 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 12:35:01,050 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 12:35:01,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 12:35:01,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 12:35:01,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 12:35:01,051 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 12:35:01,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 12:35:01,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 12:35:01,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 12:35:01,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 12:35:01,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 12:35:01,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 12:35:01,115 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 12:35:01,116 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 12:35:01,244 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 12:35:01,248 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 12:35:01,249 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-18 12:35:01,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:35:01 BoogieIcfgContainer [2022-03-18 12:35:01,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 12:35:01,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 12:35:01,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 12:35:01,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 12:35:01,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:35:00" (1/3) ... [2022-03-18 12:35:01,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3908fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:35:01, skipping insertion in model container [2022-03-18 12:35:01,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:35:00" (2/3) ... [2022-03-18 12:35:01,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3908fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:35:01, skipping insertion in model container [2022-03-18 12:35:01,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:35:01" (3/3) ... [2022-03-18 12:35:01,264 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de31.c [2022-03-18 12:35:01,269 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 12:35:01,269 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 12:35:01,323 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 12:35:01,332 INFO L340 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 [2022-03-18 12:35:01,332 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 12:35:01,362 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) [2022-03-18 12:35:01,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 12:35:01,366 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:35:01,366 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:35:01,367 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:35:01,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:35:01,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1792812365, now seen corresponding path program 1 times [2022-03-18 12:35:01,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:35:01,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144334144] [2022-03-18 12:35:01,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:35:01,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:35:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:01,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:35:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:35:01,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:35:01,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144334144] [2022-03-18 12:35:01,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144334144] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:35:01,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 12:35:01,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 12:35:01,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140559927] [2022-03-18 12:35:01,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:35:01,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 12:35:01,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:35:01,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 12:35:01,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-18 12:35:01,895 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) [2022-03-18 12:35:02,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:35:02,096 INFO L93 Difference]: Finished difference Result 49 states and 68 transitions. [2022-03-18 12:35:02,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 12:35:02,098 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 [2022-03-18 12:35:02,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:35:02,103 INFO L225 Difference]: With dead ends: 49 [2022-03-18 12:35:02,104 INFO L226 Difference]: Without dead ends: 16 [2022-03-18 12:35:02,107 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-18 12:35:02,110 INFO L912 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:35:02,110 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 49 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:35:02,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-18 12:35:02,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-03-18 12:35:02,144 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) [2022-03-18 12:35:02,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-03-18 12:35:02,147 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 14 [2022-03-18 12:35:02,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:35:02,147 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-03-18 12:35:02,148 INFO L479 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) [2022-03-18 12:35:02,148 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-03-18 12:35:02,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 12:35:02,149 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:35:02,150 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:35:02,150 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 12:35:02,150 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:35:02,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:35:02,153 INFO L85 PathProgramCache]: Analyzing trace with hash 595464366, now seen corresponding path program 1 times [2022-03-18 12:35:02,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:35:02,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750364016] [2022-03-18 12:35:02,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:35:02,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:35:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:02,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:35:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:02,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:35:02,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:35:02,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750364016] [2022-03-18 12:35:02,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750364016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:35:02,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86665104] [2022-03-18 12:35:02,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:35:02,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:35:02,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:35:02,324 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:35:02,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 12:35:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:02,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 12:35:02,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:35:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:35:02,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:35:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:35:02,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86665104] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:35:02,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:35:02,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-18 12:35:02,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570431497] [2022-03-18 12:35:02,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:35:02,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 12:35:02,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:35:02,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 12:35:02,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-18 12:35:02,544 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) [2022-03-18 12:35:02,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:35:02,744 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-03-18 12:35:02,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 12:35:02,744 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 [2022-03-18 12:35:02,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:35:02,747 INFO L225 Difference]: With dead ends: 40 [2022-03-18 12:35:02,747 INFO L226 Difference]: Without dead ends: 34 [2022-03-18 12:35:02,747 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-03-18 12:35:02,748 INFO L912 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 [2022-03-18 12:35:02,749 INFO L913 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] [2022-03-18 12:35:02,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-18 12:35:02,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2022-03-18 12:35:02,756 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) [2022-03-18 12:35:02,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-03-18 12:35:02,757 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2022-03-18 12:35:02,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:35:02,757 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-03-18 12:35:02,757 INFO L479 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) [2022-03-18 12:35:02,758 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-03-18 12:35:02,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 12:35:02,758 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:35:02,758 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:35:02,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 12:35:02,978 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:35:02,978 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:35:02,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:35:02,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1642511809, now seen corresponding path program 1 times [2022-03-18 12:35:02,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:35:02,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895026745] [2022-03-18 12:35:02,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:35:02,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:35:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:03,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:35:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:35:03,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:35:03,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895026745] [2022-03-18 12:35:03,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895026745] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:35:03,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024101676] [2022-03-18 12:35:03,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:35:03,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:35:03,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:35:03,329 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:35:03,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 12:35:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:03,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 12:35:03,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:35:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:35:03,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:35:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:35:03,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024101676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:35:03,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:35:03,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 22 [2022-03-18 12:35:03,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27586149] [2022-03-18 12:35:03,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:35:03,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 12:35:03,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:35:03,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 12:35:03,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-18 12:35:03,972 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) [2022-03-18 12:35:05,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:35:05,653 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2022-03-18 12:35:05,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 12:35:05,654 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 [2022-03-18 12:35:05,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:35:05,655 INFO L225 Difference]: With dead ends: 56 [2022-03-18 12:35:05,655 INFO L226 Difference]: Without dead ends: 39 [2022-03-18 12:35:05,656 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=388, Invalid=1868, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 12:35:05,657 INFO L912 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 12:35:05,658 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 52 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 12:35:05,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-18 12:35:05,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 25. [2022-03-18 12:35:05,667 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) [2022-03-18 12:35:05,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-03-18 12:35:05,668 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 17 [2022-03-18 12:35:05,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:35:05,668 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-03-18 12:35:05,668 INFO L479 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) [2022-03-18 12:35:05,668 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-03-18 12:35:05,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 12:35:05,669 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:35:05,669 INFO L500 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:35:05,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 12:35:05,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 12:35:05,892 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:35:05,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:35:05,892 INFO L85 PathProgramCache]: Analyzing trace with hash 2041345421, now seen corresponding path program 2 times [2022-03-18 12:35:05,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:35:05,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756391608] [2022-03-18 12:35:05,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:35:05,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:35:05,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:05,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:35:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:35:06,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:35:06,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756391608] [2022-03-18 12:35:06,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756391608] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:35:06,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454300305] [2022-03-18 12:35:06,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:35:06,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:35:06,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:35:06,010 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:35:06,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 12:35:06,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:35:06,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:35:06,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 12:35:06,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:35:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:35:06,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:35:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:35:06,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454300305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:35:06,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:35:06,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-18 12:35:06,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504214375] [2022-03-18 12:35:06,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:35:06,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 12:35:06,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:35:06,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 12:35:06,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-03-18 12:35:06,250 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) [2022-03-18 12:35:07,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:35:07,104 INFO L93 Difference]: Finished difference Result 78 states and 119 transitions. [2022-03-18 12:35:07,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 12:35:07,105 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 [2022-03-18 12:35:07,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:35:07,106 INFO L225 Difference]: With dead ends: 78 [2022-03-18 12:35:07,106 INFO L226 Difference]: Without dead ends: 72 [2022-03-18 12:35:07,107 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=391, Invalid=1091, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 12:35:07,108 INFO L912 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 12:35:07,108 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 53 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 12:35:07,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-18 12:35:07,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 44. [2022-03-18 12:35:07,122 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) [2022-03-18 12:35:07,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 58 transitions. [2022-03-18 12:35:07,123 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 58 transitions. Word has length 18 [2022-03-18 12:35:07,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:35:07,123 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 58 transitions. [2022-03-18 12:35:07,123 INFO L479 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) [2022-03-18 12:35:07,124 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 58 transitions. [2022-03-18 12:35:07,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 12:35:07,124 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:35:07,124 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:35:07,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 12:35:07,347 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:35:07,348 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:35:07,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:35:07,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1675054353, now seen corresponding path program 2 times [2022-03-18 12:35:07,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:35:07,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926650990] [2022-03-18 12:35:07,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:35:07,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:35:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:07,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:35:07,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 12:35:07,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:35:07,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926650990] [2022-03-18 12:35:07,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926650990] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:35:07,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344720600] [2022-03-18 12:35:07,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:35:07,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:35:07,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:35:07,471 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:35:07,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 12:35:07,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:35:07,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:35:07,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 12:35:07,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:35:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 12:35:07,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:35:07,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 12:35:07,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344720600] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:35:07,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:35:07,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 14 [2022-03-18 12:35:07,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115601180] [2022-03-18 12:35:07,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:35:07,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 12:35:07,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:35:07,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 12:35:07,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-18 12:35:07,687 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) [2022-03-18 12:35:07,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:35:07,994 INFO L93 Difference]: Finished difference Result 72 states and 96 transitions. [2022-03-18 12:35:07,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 12:35:07,994 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 [2022-03-18 12:35:07,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:35:07,996 INFO L225 Difference]: With dead ends: 72 [2022-03-18 12:35:07,996 INFO L226 Difference]: Without dead ends: 61 [2022-03-18 12:35:07,997 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-03-18 12:35:07,997 INFO L912 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 [2022-03-18 12:35:07,998 INFO L913 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] [2022-03-18 12:35:07,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-18 12:35:08,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2022-03-18 12:35:08,016 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) [2022-03-18 12:35:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2022-03-18 12:35:08,017 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 19 [2022-03-18 12:35:08,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:35:08,017 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2022-03-18 12:35:08,017 INFO L479 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) [2022-03-18 12:35:08,017 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2022-03-18 12:35:08,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 12:35:08,018 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:35:08,018 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:35:08,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 12:35:08,218 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:35:08,219 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:35:08,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:35:08,219 INFO L85 PathProgramCache]: Analyzing trace with hash -854221811, now seen corresponding path program 3 times [2022-03-18 12:35:08,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:35:08,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584925121] [2022-03-18 12:35:08,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:35:08,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:35:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:08,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:35:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:35:08,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:35:08,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584925121] [2022-03-18 12:35:08,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584925121] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:35:08,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941868912] [2022-03-18 12:35:08,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:35:08,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:35:08,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:35:08,536 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:35:08,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 12:35:08,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-18 12:35:08,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:35:08,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-18 12:35:08,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:35:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:35:08,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:35:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:35:09,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941868912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:35:09,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:35:09,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 23 [2022-03-18 12:35:09,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548790730] [2022-03-18 12:35:09,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:35:09,395 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 12:35:09,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:35:09,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 12:35:09,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-03-18 12:35:09,398 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) [2022-03-18 12:35:11,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:35:11,909 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2022-03-18 12:35:11,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 12:35:11,909 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 [2022-03-18 12:35:11,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:35:11,910 INFO L225 Difference]: With dead ends: 93 [2022-03-18 12:35:11,910 INFO L226 Difference]: Without dead ends: 69 [2022-03-18 12:35:11,912 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=311, Invalid=1945, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 12:35:11,912 INFO L912 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 [2022-03-18 12:35:11,913 INFO L913 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] [2022-03-18 12:35:11,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-18 12:35:11,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2022-03-18 12:35:11,930 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) [2022-03-18 12:35:11,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2022-03-18 12:35:11,931 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 20 [2022-03-18 12:35:11,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:35:11,932 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2022-03-18 12:35:11,932 INFO L479 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) [2022-03-18 12:35:11,932 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2022-03-18 12:35:11,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 12:35:11,933 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:35:11,933 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:35:11,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 12:35:12,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:35:12,148 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:35:12,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:35:12,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1752036735, now seen corresponding path program 4 times [2022-03-18 12:35:12,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:35:12,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016949725] [2022-03-18 12:35:12,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:35:12,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:35:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:12,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:35:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:12,278 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 12:35:12,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:35:12,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016949725] [2022-03-18 12:35:12,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016949725] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:35:12,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115940829] [2022-03-18 12:35:12,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 12:35:12,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:35:12,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:35:12,280 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:35:12,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 12:35:12,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 12:35:12,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:35:12,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 12:35:12,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:35:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 12:35:12,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:35:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 12:35:12,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115940829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:35:12,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:35:12,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 19 [2022-03-18 12:35:12,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227241624] [2022-03-18 12:35:12,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:35:12,563 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 12:35:12,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:35:12,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 12:35:12,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-03-18 12:35:12,564 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) [2022-03-18 12:35:13,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:35:13,091 INFO L93 Difference]: Finished difference Result 84 states and 112 transitions. [2022-03-18 12:35:13,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 12:35:13,092 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 [2022-03-18 12:35:13,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:35:13,092 INFO L225 Difference]: With dead ends: 84 [2022-03-18 12:35:13,093 INFO L226 Difference]: Without dead ends: 68 [2022-03-18 12:35:13,093 INFO L911 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 [2022-03-18 12:35:13,094 INFO L912 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:35:13,094 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 56 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 12:35:13,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-18 12:35:13,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2022-03-18 12:35:13,116 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) [2022-03-18 12:35:13,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2022-03-18 12:35:13,116 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 22 [2022-03-18 12:35:13,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:35:13,117 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2022-03-18 12:35:13,117 INFO L479 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) [2022-03-18 12:35:13,117 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2022-03-18 12:35:13,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 12:35:13,118 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:35:13,118 INFO L500 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:35:13,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 12:35:13,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:35:13,331 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:35:13,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:35:13,332 INFO L85 PathProgramCache]: Analyzing trace with hash 310755198, now seen corresponding path program 5 times [2022-03-18 12:35:13,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:35:13,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573900366] [2022-03-18 12:35:13,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:35:13,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:35:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:13,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:35:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:35:13,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:35:13,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573900366] [2022-03-18 12:35:13,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573900366] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:35:13,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499395815] [2022-03-18 12:35:13,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 12:35:13,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:35:13,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:35:13,477 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:35:13,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 12:35:13,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-18 12:35:13,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:35:13,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 12:35:13,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:35:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:35:13,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:35:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:35:13,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499395815] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:35:13,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:35:13,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-03-18 12:35:13,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965422585] [2022-03-18 12:35:13,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:35:13,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 12:35:13,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:35:13,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 12:35:13,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-03-18 12:35:13,822 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) [2022-03-18 12:35:18,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:35:18,585 INFO L93 Difference]: Finished difference Result 154 states and 223 transitions. [2022-03-18 12:35:18,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-18 12:35:18,585 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 [2022-03-18 12:35:18,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:35:18,586 INFO L225 Difference]: With dead ends: 154 [2022-03-18 12:35:18,586 INFO L226 Difference]: Without dead ends: 144 [2022-03-18 12:35:18,589 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1701, Invalid=5271, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 12:35:18,590 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 261 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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 [2022-03-18 12:35:18,590 INFO L913 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] [2022-03-18 12:35:18,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-18 12:35:18,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 76. [2022-03-18 12:35:18,617 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) [2022-03-18 12:35:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 103 transitions. [2022-03-18 12:35:18,618 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 103 transitions. Word has length 22 [2022-03-18 12:35:18,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:35:18,618 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 103 transitions. [2022-03-18 12:35:18,619 INFO L479 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) [2022-03-18 12:35:18,619 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 103 transitions. [2022-03-18 12:35:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 12:35:18,619 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:35:18,620 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:35:18,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 12:35:18,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:35:18,837 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:35:18,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:35:18,838 INFO L85 PathProgramCache]: Analyzing trace with hash 142103551, now seen corresponding path program 6 times [2022-03-18 12:35:18,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:35:18,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559766348] [2022-03-18 12:35:18,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:35:18,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:35:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:19,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:35:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:19,257 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:35:19,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:35:19,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559766348] [2022-03-18 12:35:19,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559766348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:35:19,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780962865] [2022-03-18 12:35:19,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 12:35:19,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:35:19,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:35:19,259 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) [2022-03-18 12:35:19,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 12:35:19,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-18 12:35:19,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:35:19,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-18 12:35:19,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:35:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:35:19,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:35:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:35:20,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780962865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:35:20,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:35:20,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 13] total 32 [2022-03-18 12:35:20,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605239771] [2022-03-18 12:35:20,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:35:20,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 12:35:20,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:35:20,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 12:35:20,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2022-03-18 12:35:20,199 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) [2022-03-18 12:35:23,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:35:23,926 INFO L93 Difference]: Finished difference Result 126 states and 161 transitions. [2022-03-18 12:35:23,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 12:35:23,927 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 [2022-03-18 12:35:23,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:35:23,928 INFO L225 Difference]: With dead ends: 126 [2022-03-18 12:35:23,928 INFO L226 Difference]: Without dead ends: 98 [2022-03-18 12:35:23,929 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=456, Invalid=3450, Unknown=0, NotChecked=0, Total=3906 [2022-03-18 12:35:23,929 INFO L912 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 [2022-03-18 12:35:23,929 INFO L913 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] [2022-03-18 12:35:23,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-18 12:35:23,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2022-03-18 12:35:23,961 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) [2022-03-18 12:35:23,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 100 transitions. [2022-03-18 12:35:23,962 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 100 transitions. Word has length 23 [2022-03-18 12:35:23,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:35:23,962 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 100 transitions. [2022-03-18 12:35:23,963 INFO L479 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) [2022-03-18 12:35:23,963 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 100 transitions. [2022-03-18 12:35:23,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 12:35:23,963 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:35:23,964 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:35:23,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 12:35:24,188 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-18 12:35:24,188 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:35:24,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:35:24,189 INFO L85 PathProgramCache]: Analyzing trace with hash -2034209681, now seen corresponding path program 7 times [2022-03-18 12:35:24,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:35:24,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882852405] [2022-03-18 12:35:24,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:35:24,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:35:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:24,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:35:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 12:35:24,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:35:24,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882852405] [2022-03-18 12:35:24,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882852405] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:35:24,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684514934] [2022-03-18 12:35:24,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 12:35:24,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:35:24,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:35:24,320 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) [2022-03-18 12:35:24,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 12:35:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:24,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 12:35:24,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:35:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 12:35:24,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:35:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 12:35:24,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684514934] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:35:24,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:35:24,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-03-18 12:35:24,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366206453] [2022-03-18 12:35:24,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:35:24,670 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 12:35:24,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:35:24,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 12:35:24,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-03-18 12:35:24,671 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) [2022-03-18 12:35:25,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:35:25,432 INFO L93 Difference]: Finished difference Result 119 states and 160 transitions. [2022-03-18 12:35:25,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 12:35:25,433 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 [2022-03-18 12:35:25,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:35:25,433 INFO L225 Difference]: With dead ends: 119 [2022-03-18 12:35:25,433 INFO L226 Difference]: Without dead ends: 100 [2022-03-18 12:35:25,434 INFO L911 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 [2022-03-18 12:35:25,435 INFO L912 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:35:25,435 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 84 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 12:35:25,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-18 12:35:25,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2022-03-18 12:35:25,456 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) [2022-03-18 12:35:25,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 110 transitions. [2022-03-18 12:35:25,457 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 110 transitions. Word has length 25 [2022-03-18 12:35:25,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:35:25,457 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 110 transitions. [2022-03-18 12:35:25,457 INFO L479 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) [2022-03-18 12:35:25,457 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 110 transitions. [2022-03-18 12:35:25,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 12:35:25,458 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:35:25,458 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:35:25,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 12:35:25,660 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 12:35:25,660 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:35:25,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:35:25,661 INFO L85 PathProgramCache]: Analyzing trace with hash 359277261, now seen corresponding path program 8 times [2022-03-18 12:35:25,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:35:25,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749372892] [2022-03-18 12:35:25,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:35:25,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:35:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:26,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:35:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:35:26,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:35:26,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749372892] [2022-03-18 12:35:26,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749372892] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:35:26,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038672982] [2022-03-18 12:35:26,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:35:26,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:35:26,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:35:26,144 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) [2022-03-18 12:35:26,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 12:35:26,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:35:26,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:35:26,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-18 12:35:26,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:35:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:35:26,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:35:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:35:28,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038672982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:35:28,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:35:28,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 15] total 36 [2022-03-18 12:35:28,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212573281] [2022-03-18 12:35:28,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:35:28,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 12:35:28,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:35:28,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 12:35:28,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 12:35:28,373 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) [2022-03-18 12:35:29,909 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 12:35:31,036 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 12:35:33,667 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 12:35:42,564 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 [] [2022-03-18 12:35:47,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:35:47,802 INFO L93 Difference]: Finished difference Result 140 states and 178 transitions. [2022-03-18 12:35:47,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-18 12:35:47,802 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 [2022-03-18 12:35:47,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:35:47,803 INFO L225 Difference]: With dead ends: 140 [2022-03-18 12:35:47,803 INFO L226 Difference]: Without dead ends: 105 [2022-03-18 12:35:47,804 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=583, Invalid=4819, Unknown=0, NotChecked=0, Total=5402 [2022-03-18 12:35:47,805 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 88 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 96 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-03-18 12:35:47,805 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 98 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 628 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2022-03-18 12:35:47,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-18 12:35:47,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 76. [2022-03-18 12:35:47,832 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) [2022-03-18 12:35:47,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 103 transitions. [2022-03-18 12:35:47,832 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 103 transitions. Word has length 26 [2022-03-18 12:35:47,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:35:47,832 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 103 transitions. [2022-03-18 12:35:47,833 INFO L479 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) [2022-03-18 12:35:47,833 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 103 transitions. [2022-03-18 12:35:47,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 12:35:47,833 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:35:47,834 INFO L500 BasicCegarLoop]: trace histogram [7, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:35:47,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 12:35:48,037 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 12:35:48,037 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:35:48,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:35:48,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1955077522, now seen corresponding path program 9 times [2022-03-18 12:35:48,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:35:48,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060705473] [2022-03-18 12:35:48,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:35:48,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:35:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:48,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:35:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 12:35:48,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:35:48,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060705473] [2022-03-18 12:35:48,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060705473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:35:48,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885362605] [2022-03-18 12:35:48,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:35:48,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:35:48,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:35:48,261 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) [2022-03-18 12:35:48,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 12:35:48,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 12:35:48,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:35:48,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 12:35:48,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:35:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-18 12:35:48,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:35:48,582 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-18 12:35:48,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885362605] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:35:48,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:35:48,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 25 [2022-03-18 12:35:48,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524687142] [2022-03-18 12:35:48,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:35:48,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 12:35:48,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:35:48,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 12:35:48,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-03-18 12:35:48,584 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) [2022-03-18 12:35:49,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:35:49,637 INFO L93 Difference]: Finished difference Result 128 states and 172 transitions. [2022-03-18 12:35:49,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 12:35:49,638 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 [2022-03-18 12:35:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:35:49,639 INFO L225 Difference]: With dead ends: 128 [2022-03-18 12:35:49,639 INFO L226 Difference]: Without dead ends: 114 [2022-03-18 12:35:49,640 INFO L911 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 [2022-03-18 12:35:49,641 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 108 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-03-18 12:35:49,641 INFO L913 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] [2022-03-18 12:35:49,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-18 12:35:49,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 83. [2022-03-18 12:35:49,674 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) [2022-03-18 12:35:49,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2022-03-18 12:35:49,675 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 27 [2022-03-18 12:35:49,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:35:49,675 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2022-03-18 12:35:49,675 INFO L479 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) [2022-03-18 12:35:49,675 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2022-03-18 12:35:49,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 12:35:49,676 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:35:49,676 INFO L500 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:35:49,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 12:35:49,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 12:35:49,891 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:35:49,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:35:49,892 INFO L85 PathProgramCache]: Analyzing trace with hash 867538926, now seen corresponding path program 3 times [2022-03-18 12:35:49,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:35:49,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417866603] [2022-03-18 12:35:49,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:35:49,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:35:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:50,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:35:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:35:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:35:50,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:35:50,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417866603] [2022-03-18 12:35:50,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417866603] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:35:50,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39341888] [2022-03-18 12:35:50,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:35:50,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:35:50,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:35:50,125 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) [2022-03-18 12:35:50,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 12:35:50,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-18 12:35:50,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:35:50,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-18 12:35:50,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:35:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:35:50,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:35:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:35:50,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39341888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:35:50,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:35:50,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-03-18 12:35:50,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320632042] [2022-03-18 12:35:50,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:35:50,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 12:35:50,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:35:50,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 12:35:50,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 12:35:50,769 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) [2022-03-18 12:36:11,685 WARN L232 SmtUtils]: Spent 5.96s 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) [2022-03-18 12:36:54,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:36:54,930 INFO L93 Difference]: Finished difference Result 399 states and 542 transitions. [2022-03-18 12:36:54,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-18 12:36:54,930 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 [2022-03-18 12:36:54,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:36:54,932 INFO L225 Difference]: With dead ends: 399 [2022-03-18 12:36:54,932 INFO L226 Difference]: Without dead ends: 371 [2022-03-18 12:36:54,934 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2586 ImplicationChecksByTransitivity, 62.3s TimeCoverageRelationStatistics Valid=2476, Invalid=7226, Unknown=0, NotChecked=0, Total=9702 [2022-03-18 12:36:54,935 INFO L912 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 [2022-03-18 12:36:54,935 INFO L913 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] [2022-03-18 12:36:54,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-03-18 12:36:54,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 122. [2022-03-18 12:36:54,973 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) [2022-03-18 12:36:54,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 161 transitions. [2022-03-18 12:36:54,973 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 161 transitions. Word has length 27 [2022-03-18 12:36:54,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:36:54,974 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 161 transitions. [2022-03-18 12:36:54,974 INFO L479 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) [2022-03-18 12:36:54,974 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 161 transitions. [2022-03-18 12:36:54,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 12:36:54,975 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:36:54,975 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:36:54,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 12:36:55,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 12:36:55,175 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:36:55,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:36:55,176 INFO L85 PathProgramCache]: Analyzing trace with hash -603591809, now seen corresponding path program 10 times [2022-03-18 12:36:55,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:36:55,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333017565] [2022-03-18 12:36:55,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:36:55,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:36:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:36:55,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:36:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:36:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 12:36:55,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:36:55,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333017565] [2022-03-18 12:36:55,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333017565] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:36:55,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443824141] [2022-03-18 12:36:55,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 12:36:55,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:36:55,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:36:55,325 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) [2022-03-18 12:36:55,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 12:36:55,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 12:36:55,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:36:55,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 12:36:55,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:36:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 12:36:55,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:36:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 12:36:55,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443824141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:36:55,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:36:55,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 29 [2022-03-18 12:36:55,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651261205] [2022-03-18 12:36:55,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:36:55,745 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 12:36:55,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:36:55,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 12:36:55,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-03-18 12:36:55,746 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) [2022-03-18 12:36:56,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:36:56,930 INFO L93 Difference]: Finished difference Result 209 states and 264 transitions. [2022-03-18 12:36:56,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 12:36:56,930 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 [2022-03-18 12:36:56,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:36:56,931 INFO L225 Difference]: With dead ends: 209 [2022-03-18 12:36:56,931 INFO L226 Difference]: Without dead ends: 159 [2022-03-18 12:36:56,932 INFO L911 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 [2022-03-18 12:36:56,933 INFO L912 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 [2022-03-18 12:36:56,933 INFO L913 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] [2022-03-18 12:36:56,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-18 12:36:56,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 136. [2022-03-18 12:36:56,989 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) [2022-03-18 12:36:56,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 177 transitions. [2022-03-18 12:36:56,990 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 177 transitions. Word has length 28 [2022-03-18 12:36:56,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:36:56,990 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 177 transitions. [2022-03-18 12:36:56,990 INFO L479 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) [2022-03-18 12:36:56,990 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 177 transitions. [2022-03-18 12:36:56,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 12:36:56,990 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:36:56,991 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:36:57,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 12:36:57,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 12:36:57,191 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:36:57,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:36:57,192 INFO L85 PathProgramCache]: Analyzing trace with hash 646714815, now seen corresponding path program 11 times [2022-03-18 12:36:57,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:36:57,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885177087] [2022-03-18 12:36:57,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:36:57,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:36:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:36:57,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:36:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:36:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:36:57,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:36:57,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885177087] [2022-03-18 12:36:57,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885177087] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:36:57,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916111331] [2022-03-18 12:36:57,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 12:36:57,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:36:57,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:36:57,780 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) [2022-03-18 12:36:57,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 12:36:58,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-18 12:36:58,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:36:58,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 12:36:58,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:36:58,723 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:36:58,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:37:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:37:01,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916111331] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:37:01,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:37:01,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 37 [2022-03-18 12:37:01,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979592702] [2022-03-18 12:37:01,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:37:01,906 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 12:37:01,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:37:01,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 12:37:01,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1191, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 12:37:01,907 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) [2022-03-18 12:37:03,763 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 12:37:07,456 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 [] [2022-03-18 12:37:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:37:26,894 INFO L93 Difference]: Finished difference Result 202 states and 247 transitions. [2022-03-18 12:37:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 12:37:26,895 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 [2022-03-18 12:37:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:37:26,897 INFO L225 Difference]: With dead ends: 202 [2022-03-18 12:37:26,897 INFO L226 Difference]: Without dead ends: 170 [2022-03-18 12:37:26,899 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=604, Invalid=5400, Unknown=2, NotChecked=0, Total=6006 [2022-03-18 12:37:26,899 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 103 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:37:26,900 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 124 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 700 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2022-03-18 12:37:26,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-03-18 12:37:26,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 124. [2022-03-18 12:37:26,950 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) [2022-03-18 12:37:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 162 transitions. [2022-03-18 12:37:26,951 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 162 transitions. Word has length 29 [2022-03-18 12:37:26,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:37:26,951 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 162 transitions. [2022-03-18 12:37:26,951 INFO L479 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) [2022-03-18 12:37:26,951 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 162 transitions. [2022-03-18 12:37:26,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 12:37:26,952 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:37:26,952 INFO L500 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:37:26,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 12:37:27,154 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:37:27,155 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:37:27,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:37:27,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1363427330, now seen corresponding path program 12 times [2022-03-18 12:37:27,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:37:27,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545786440] [2022-03-18 12:37:27,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:37:27,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:37:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:37:27,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:37:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:37:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:37:27,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:37:27,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545786440] [2022-03-18 12:37:27,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545786440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:37:27,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559010438] [2022-03-18 12:37:27,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 12:37:27,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:37:27,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:37:27,415 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) [2022-03-18 12:37:27,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 12:37:27,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-18 12:37:27,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:37:27,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-18 12:37:27,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:37:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:37:27,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:37:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:37:28,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559010438] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:37:28,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:37:28,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-03-18 12:37:28,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514554063] [2022-03-18 12:37:28,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:37:28,112 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 12:37:28,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:37:28,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 12:37:28,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1102, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 12:37:28,113 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) [2022-03-18 12:37:41,806 WARN L232 SmtUtils]: Spent 8.13s 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) [2022-03-18 12:38:02,321 WARN L232 SmtUtils]: Spent 11.80s 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) [2022-03-18 12:38:19,176 WARN L232 SmtUtils]: Spent 5.39s 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) [2022-03-18 12:38:29,293 WARN L232 SmtUtils]: Spent 6.49s 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) [2022-03-18 12:38:43,471 WARN L232 SmtUtils]: Spent 6.61s 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) [2022-03-18 12:39:07,618 WARN L232 SmtUtils]: Spent 8.81s 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) [2022-03-18 12:39:31,788 WARN L232 SmtUtils]: Spent 5.78s 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) [2022-03-18 12:41:13,080 WARN L232 SmtUtils]: Spent 7.25s 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) [2022-03-18 12:41:14,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:41:14,316 INFO L93 Difference]: Finished difference Result 456 states and 602 transitions. [2022-03-18 12:41:14,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-03-18 12:41:14,317 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 [2022-03-18 12:41:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:41:14,318 INFO L225 Difference]: With dead ends: 456 [2022-03-18 12:41:14,318 INFO L226 Difference]: Without dead ends: 438 [2022-03-18 12:41:14,321 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10994 ImplicationChecksByTransitivity, 221.9s TimeCoverageRelationStatistics Valid=7019, Invalid=22051, Unknown=0, NotChecked=0, Total=29070 [2022-03-18 12:41:14,321 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 987 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 1271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 2642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1271 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-03-18 12:41:14,322 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [987 Valid, 126 Invalid, 2642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1271 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-03-18 12:41:14,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-03-18 12:41:14,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 137. [2022-03-18 12:41:14,378 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) [2022-03-18 12:41:14,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 179 transitions. [2022-03-18 12:41:14,378 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 179 transitions. Word has length 30 [2022-03-18 12:41:14,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:41:14,379 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 179 transitions. [2022-03-18 12:41:14,379 INFO L479 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) [2022-03-18 12:41:14,379 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 179 transitions. [2022-03-18 12:41:14,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 12:41:14,379 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:41:14,380 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:41:14,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 12:41:14,584 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-18 12:41:14,584 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:41:14,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:41:14,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2100427281, now seen corresponding path program 13 times [2022-03-18 12:41:14,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:41:14,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646097888] [2022-03-18 12:41:14,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:41:14,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:41:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:41:14,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:41:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:41:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-18 12:41:14,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:41:14,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646097888] [2022-03-18 12:41:14,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646097888] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:41:14,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019882602] [2022-03-18 12:41:14,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 12:41:14,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:41:14,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:41:14,769 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) [2022-03-18 12:41:14,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 12:41:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:41:14,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 12:41:14,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:41:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-18 12:41:15,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:41:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-18 12:41:15,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019882602] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:41:15,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:41:15,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 34 [2022-03-18 12:41:15,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884322745] [2022-03-18 12:41:15,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:41:15,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 12:41:15,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:41:15,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 12:41:15,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 12:41:15,308 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) [2022-03-18 12:41:17,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:41:17,108 INFO L93 Difference]: Finished difference Result 242 states and 303 transitions. [2022-03-18 12:41:17,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 12:41:17,108 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 [2022-03-18 12:41:17,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:41:17,109 INFO L225 Difference]: With dead ends: 242 [2022-03-18 12:41:17,109 INFO L226 Difference]: Without dead ends: 179 [2022-03-18 12:41:17,110 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=518, Invalid=3904, Unknown=0, NotChecked=0, Total=4422 [2022-03-18 12:41:17,110 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 12:41:17,111 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 94 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 12:41:17,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-18 12:41:17,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 153. [2022-03-18 12:41:17,177 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) [2022-03-18 12:41:17,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 197 transitions. [2022-03-18 12:41:17,178 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 197 transitions. Word has length 31 [2022-03-18 12:41:17,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:41:17,178 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 197 transitions. [2022-03-18 12:41:17,178 INFO L479 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) [2022-03-18 12:41:17,178 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 197 transitions. [2022-03-18 12:41:17,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 12:41:17,179 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:41:17,179 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:41:17,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-18 12:41:17,391 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-18 12:41:17,391 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:41:17,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:41:17,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1375844749, now seen corresponding path program 14 times [2022-03-18 12:41:17,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:41:17,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742155728] [2022-03-18 12:41:17,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:41:17,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:41:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:41:18,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:41:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:41:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:41:18,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:41:18,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742155728] [2022-03-18 12:41:18,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742155728] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:41:18,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880874024] [2022-03-18 12:41:18,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:41:18,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:41:18,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:41:18,038 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) [2022-03-18 12:41:18,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 12:41:18,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:41:18,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:41:18,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-18 12:41:18,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:41:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:41:18,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:41:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:41:21,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880874024] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:41:21,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:41:21,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 43 [2022-03-18 12:41:21,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936013347] [2022-03-18 12:41:21,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:41:21,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 12:41:21,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:41:21,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 12:41:21,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 12:41:21,340 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) [2022-03-18 12:41:59,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:41:59,217 INFO L93 Difference]: Finished difference Result 246 states and 296 transitions. [2022-03-18 12:41:59,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-18 12:41:59,217 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 [2022-03-18 12:41:59,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:41:59,218 INFO L225 Difference]: With dead ends: 246 [2022-03-18 12:41:59,218 INFO L226 Difference]: Without dead ends: 210 [2022-03-18 12:41:59,219 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 39.5s TimeCoverageRelationStatistics Valid=777, Invalid=7410, Unknown=3, NotChecked=0, Total=8190 [2022-03-18 12:41:59,220 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 110 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 12:41:59,220 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 114 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 12:41:59,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-03-18 12:41:59,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 139. [2022-03-18 12:41:59,287 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) [2022-03-18 12:41:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 180 transitions. [2022-03-18 12:41:59,288 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 180 transitions. Word has length 32 [2022-03-18 12:41:59,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:41:59,288 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 180 transitions. [2022-03-18 12:41:59,288 INFO L479 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) [2022-03-18 12:41:59,288 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 180 transitions. [2022-03-18 12:41:59,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 12:41:59,289 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:41:59,289 INFO L500 BasicCegarLoop]: trace histogram [15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:41:59,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 12:41:59,490 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 12:41:59,490 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:41:59,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:41:59,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1705192978, now seen corresponding path program 15 times [2022-03-18 12:41:59,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:41:59,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433598389] [2022-03-18 12:41:59,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:41:59,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:41:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:41:59,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:41:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:41:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 12:41:59,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:41:59,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433598389] [2022-03-18 12:41:59,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433598389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:41:59,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504037449] [2022-03-18 12:41:59,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:41:59,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:41:59,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:41:59,833 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) [2022-03-18 12:41:59,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 12:42:00,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-18 12:42:00,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:42:00,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 12:42:00,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:42:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 12:42:00,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:42:00,923 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 12:42:00,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504037449] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:42:00,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:42:00,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-03-18 12:42:00,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288560512] [2022-03-18 12:42:00,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:42:00,924 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-18 12:42:00,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:42:00,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-18 12:42:00,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1373, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 12:42:00,925 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) [2022-03-18 12:42:16,064 WARN L232 SmtUtils]: Spent 7.69s 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) [2022-03-18 12:42:25,532 WARN L232 SmtUtils]: Spent 5.88s 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) [2022-03-18 12:42:48,112 WARN L232 SmtUtils]: Spent 14.73s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:43:14,097 WARN L232 SmtUtils]: Spent 10.74s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:43:37,525 WARN L232 SmtUtils]: Spent 14.41s 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) [2022-03-18 12:44:06,412 WARN L232 SmtUtils]: Spent 12.59s 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) [2022-03-18 12:44:21,565 WARN L232 SmtUtils]: Spent 11.01s 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) [2022-03-18 12:44:33,979 WARN L232 SmtUtils]: Spent 7.73s 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) [2022-03-18 12:44:52,730 WARN L232 SmtUtils]: Spent 7.51s 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) [2022-03-18 12:45:02,916 WARN L232 SmtUtils]: Spent 6.97s 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) [2022-03-18 12:45:18,959 WARN L232 SmtUtils]: Spent 9.91s 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) [2022-03-18 12:45:39,949 WARN L232 SmtUtils]: Spent 11.88s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:45:51,604 WARN L232 SmtUtils]: Spent 5.22s 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) [2022-03-18 12:46:05,395 WARN L232 SmtUtils]: Spent 5.45s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:46:10,722 WARN L833 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ 2 c_main_~y~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 (+ 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 (+ 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 [2022-03-18 12:46:28,389 WARN L232 SmtUtils]: Spent 11.49s 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) [2022-03-18 12:46:38,810 WARN L232 SmtUtils]: Spent 5.80s 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) [2022-03-18 12:47:03,589 WARN L232 SmtUtils]: Spent 7.24s 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) [2022-03-18 12:47:24,703 WARN L232 SmtUtils]: Spent 7.69s 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) [2022-03-18 12:47:33,003 WARN L232 SmtUtils]: Spent 5.87s 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) [2022-03-18 12:48:00,528 WARN L232 SmtUtils]: Spent 5.18s 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)