/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/nested-3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-05 23:57:31,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 23:57:31,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 23:57:31,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 23:57:31,924 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 [2022-04-05 23:57:31,943 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 23:57:31,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 23:57:31,943 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-04-05 23:57:31,943 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-04-05 23:57:31,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 23:57:31,944 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 23:57:31,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 23:57:31,944 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 23:57:31,945 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 23:57:31,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 23:57:31,945 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 23:57:31,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 23:57:31,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 23:57:31,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 23:57:31,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 23:57:31,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 23:57:31,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 23:57:31,946 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 23:57:31,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 23:57:31,947 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 23:57:31,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 23:57:31,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 23:57:31,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 23:57:31,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 23:57:31,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 23:57:31,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 23:57:31,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 23:57:31,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 23:57:31,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 23:57:31,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 23:57:31,948 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-04-05 23:57:31,948 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-04-05 23:57:31,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 23:57:31,948 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 23:57:32,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 23:57:32,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 23:57:32,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 23:57:32,165 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 23:57:32,167 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 23:57:32,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/nested-3.c [2022-04-05 23:57:32,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaa278b73/07050c1364dd4f3a928de71b7b020912/FLAG224308c5d [2022-04-05 23:57:32,516 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 23:57:32,516 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested-3.c [2022-04-05 23:57:32,525 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaa278b73/07050c1364dd4f3a928de71b7b020912/FLAG224308c5d [2022-04-05 23:57:32,945 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaa278b73/07050c1364dd4f3a928de71b7b020912 [2022-04-05 23:57:32,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 23:57:32,948 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-05 23:57:32,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 23:57:32,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 23:57:32,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 23:57:32,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 11:57:32" (1/1) ... [2022-04-05 23:57:32,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1deaf03d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:57:32, skipping insertion in model container [2022-04-05 23:57:32,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 11:57:32" (1/1) ... [2022-04-05 23:57:32,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 23:57:32,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 23:57:33,055 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested-3.c[404,417] [2022-04-05 23:57:33,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 23:57:33,077 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 23:57:33,085 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested-3.c[404,417] [2022-04-05 23:57:33,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 23:57:33,101 INFO L208 MainTranslator]: Completed translation [2022-04-05 23:57:33,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:57:33 WrapperNode [2022-04-05 23:57:33,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 23:57:33,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 23:57:33,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 23:57:33,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 23:57:33,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:57:33" (1/1) ... [2022-04-05 23:57:33,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:57:33" (1/1) ... [2022-04-05 23:57:33,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:57:33" (1/1) ... [2022-04-05 23:57:33,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:57:33" (1/1) ... [2022-04-05 23:57:33,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:57:33" (1/1) ... [2022-04-05 23:57:33,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:57:33" (1/1) ... [2022-04-05 23:57:33,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:57:33" (1/1) ... [2022-04-05 23:57:33,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 23:57:33,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 23:57:33,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 23:57:33,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 23:57:33,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:57:33" (1/1) ... [2022-04-05 23:57:33,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 23:57:33,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:57:33,158 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) [2022-04-05 23:57:33,170 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 [2022-04-05 23:57:33,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 23:57:33,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 23:57:33,188 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 23:57:33,188 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 23:57:33,190 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 23:57:33,190 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 23:57:33,190 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 23:57:33,190 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 23:57:33,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 23:57:33,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 23:57:33,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 23:57:33,190 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 23:57:33,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 23:57:33,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 23:57:33,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 23:57:33,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 23:57:33,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 23:57:33,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 23:57:33,233 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 23:57:33,235 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 23:57:33,373 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 23:57:33,377 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 23:57:33,377 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 23:57:33,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 11:57:33 BoogieIcfgContainer [2022-04-05 23:57:33,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 23:57:33,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 23:57:33,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 23:57:33,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 23:57:33,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 11:57:32" (1/3) ... [2022-04-05 23:57:33,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ead176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 11:57:33, skipping insertion in model container [2022-04-05 23:57:33,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:57:33" (2/3) ... [2022-04-05 23:57:33,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ead176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 11:57:33, skipping insertion in model container [2022-04-05 23:57:33,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 11:57:33" (3/3) ... [2022-04-05 23:57:33,384 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-3.c [2022-04-05 23:57:33,387 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 23:57:33,388 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 23:57:33,429 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 23:57:33,434 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 [2022-04-05 23:57:33,434 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 23:57:33,459 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.6) internal successors, (24), 17 states have internal predecessors, (24), 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) [2022-04-05 23:57:33,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-05 23:57:33,462 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:57:33,463 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:57:33,463 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:57:33,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:57:33,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1677248157, now seen corresponding path program 1 times [2022-04-05 23:57:33,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:57:33,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865705505] [2022-04-05 23:57:33,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:57:33,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:57:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:33,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:57:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:57:33,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:57:33,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865705505] [2022-04-05 23:57:33,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865705505] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 23:57:33,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 23:57:33,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 23:57:33,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130002768] [2022-04-05 23:57:33,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 23:57:33,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 23:57:33,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:57:33,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 23:57:33,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 23:57:33,691 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.6) internal successors, (24), 17 states have internal predecessors, (24), 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 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:57:33,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:57:33,752 INFO L93 Difference]: Finished difference Result 40 states and 61 transitions. [2022-04-05 23:57:33,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 23:57:33,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-05 23:57:33,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:57:33,760 INFO L225 Difference]: With dead ends: 40 [2022-04-05 23:57:33,760 INFO L226 Difference]: Without dead ends: 23 [2022-04-05 23:57:33,767 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 23:57:33,770 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 23:57:33,770 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 26 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 23:57:33,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-05 23:57:33,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-04-05 23:57:33,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 23:57:33,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-04-05 23:57:33,795 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2022-04-05 23:57:33,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:57:33,796 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-04-05 23:57:33,796 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:57:33,796 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-04-05 23:57:33,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 23:57:33,797 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:57:33,797 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:57:33,797 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 23:57:33,798 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:57:33,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:57:33,800 INFO L85 PathProgramCache]: Analyzing trace with hash -946078686, now seen corresponding path program 1 times [2022-04-05 23:57:33,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:57:33,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768799904] [2022-04-05 23:57:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:57:33,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:57:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:33,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:57:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:57:33,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:57:33,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768799904] [2022-04-05 23:57:33,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768799904] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:57:33,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772015693] [2022-04-05 23:57:33,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:57:33,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:57:33,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:57:33,892 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) [2022-04-05 23:57:33,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 23:57:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:33,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2022-04-05 23:57:33,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:57:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 23:57:34,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 23:57:34,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772015693] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 23:57:34,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 23:57:34,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-04-05 23:57:34,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508630069] [2022-04-05 23:57:34,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 23:57:34,004 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 23:57:34,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:57:34,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 23:57:34,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-05 23:57:34,005 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:57:34,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:57:34,021 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2022-04-05 23:57:34,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 23:57:34,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-05 23:57:34,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:57:34,023 INFO L225 Difference]: With dead ends: 37 [2022-04-05 23:57:34,023 INFO L226 Difference]: Without dead ends: 23 [2022-04-05 23:57:34,023 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-05 23:57:34,024 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 23:57:34,024 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 34 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 23:57:34,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-05 23:57:34,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-04-05 23:57:34,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 23:57:34,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-04-05 23:57:34,029 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 17 [2022-04-05 23:57:34,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:57:34,030 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-04-05 23:57:34,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:57:34,030 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-04-05 23:57:34,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 23:57:34,030 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:57:34,030 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:57:34,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 23:57:34,244 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 [2022-04-05 23:57:34,245 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:57:34,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:57:34,245 INFO L85 PathProgramCache]: Analyzing trace with hash -944231644, now seen corresponding path program 1 times [2022-04-05 23:57:34,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:57:34,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801100372] [2022-04-05 23:57:34,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:57:34,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:57:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:34,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:57:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:57:34,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:57:34,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801100372] [2022-04-05 23:57:34,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801100372] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:57:34,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86722382] [2022-04-05 23:57:34,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:57:34,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:57:34,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:57:34,296 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) [2022-04-05 23:57:34,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 23:57:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:34,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-05 23:57:34,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:57:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:57:34,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 23:57:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:57:34,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86722382] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 23:57:34,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 23:57:34,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-05 23:57:34,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992239132] [2022-04-05 23:57:34,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 23:57:34,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 23:57:34,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:57:34,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 23:57:34,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-05 23:57:34,408 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:57:34,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:57:34,450 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-04-05 23:57:34,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 23:57:34,450 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-05 23:57:34,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:57:34,451 INFO L225 Difference]: With dead ends: 46 [2022-04-05 23:57:34,451 INFO L226 Difference]: Without dead ends: 31 [2022-04-05 23:57:34,451 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-05 23:57:34,452 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 23:57:34,452 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 31 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 23:57:34,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-05 23:57:34,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-04-05 23:57:34,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 23:57:34,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-04-05 23:57:34,456 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2022-04-05 23:57:34,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:57:34,456 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-04-05 23:57:34,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:57:34,456 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-04-05 23:57:34,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 23:57:34,457 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:57:34,457 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:57:34,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 23:57:34,671 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 [2022-04-05 23:57:34,672 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:57:34,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:57:34,672 INFO L85 PathProgramCache]: Analyzing trace with hash -19048539, now seen corresponding path program 2 times [2022-04-05 23:57:34,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:57:34,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746093301] [2022-04-05 23:57:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:57:34,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:57:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:34,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:57:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-05 23:57:34,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:57:34,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746093301] [2022-04-05 23:57:34,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746093301] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:57:34,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132741843] [2022-04-05 23:57:34,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 23:57:34,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:57:34,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:57:34,747 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) [2022-04-05 23:57:34,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 23:57:34,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 23:57:34,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 23:57:34,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-05 23:57:34,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:57:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 23:57:34,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 23:57:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 23:57:34,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132741843] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 23:57:34,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 23:57:34,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-04-05 23:57:34,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708016311] [2022-04-05 23:57:34,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 23:57:34,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 23:57:34,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:57:34,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 23:57:34,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-04-05 23:57:34,956 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 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) [2022-04-05 23:57:35,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:57:35,209 INFO L93 Difference]: Finished difference Result 117 states and 149 transitions. [2022-04-05 23:57:35,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-05 23:57:35,210 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-05 23:57:35,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:57:35,211 INFO L225 Difference]: With dead ends: 117 [2022-04-05 23:57:35,211 INFO L226 Difference]: Without dead ends: 93 [2022-04-05 23:57:35,211 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-04-05 23:57:35,212 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 23:57:35,212 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 44 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 23:57:35,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-05 23:57:35,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 75. [2022-04-05 23:57:35,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 66 states have internal predecessors, (85), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 23:57:35,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2022-04-05 23:57:35,226 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 26 [2022-04-05 23:57:35,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:57:35,226 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2022-04-05 23:57:35,226 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 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) [2022-04-05 23:57:35,226 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2022-04-05 23:57:35,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 23:57:35,227 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:57:35,227 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:57:35,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 23:57:35,431 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 [2022-04-05 23:57:35,431 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:57:35,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:57:35,432 INFO L85 PathProgramCache]: Analyzing trace with hash -561595545, now seen corresponding path program 1 times [2022-04-05 23:57:35,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:57:35,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381270256] [2022-04-05 23:57:35,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:57:35,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:57:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:35,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:57:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 23:57:35,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:57:35,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381270256] [2022-04-05 23:57:35,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381270256] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:57:35,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134087140] [2022-04-05 23:57:35,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:57:35,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:57:35,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:57:35,534 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) [2022-04-05 23:57:35,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 23:57:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:35,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-05 23:57:35,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:57:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 23:57:35,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 23:57:35,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134087140] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 23:57:35,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 23:57:35,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-04-05 23:57:35,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835330976] [2022-04-05 23:57:35,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 23:57:35,624 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 23:57:35,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:57:35,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 23:57:35,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-05 23:57:35,625 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:57:35,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:57:35,669 INFO L93 Difference]: Finished difference Result 205 states and 267 transitions. [2022-04-05 23:57:35,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 23:57:35,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-05 23:57:35,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:57:35,671 INFO L225 Difference]: With dead ends: 205 [2022-04-05 23:57:35,671 INFO L226 Difference]: Without dead ends: 136 [2022-04-05 23:57:35,672 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-05 23:57:35,672 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 23:57:35,672 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 42 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 23:57:35,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-04-05 23:57:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 100. [2022-04-05 23:57:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 90 states have (on average 1.2777777777777777) internal successors, (115), 91 states have internal predecessors, (115), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 23:57:35,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2022-04-05 23:57:35,691 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 26 [2022-04-05 23:57:35,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:57:35,691 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2022-04-05 23:57:35,691 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:57:35,692 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2022-04-05 23:57:35,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 23:57:35,692 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:57:35,692 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:57:35,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 23:57:35,899 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 [2022-04-05 23:57:35,899 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:57:35,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:57:35,900 INFO L85 PathProgramCache]: Analyzing trace with hash -303430107, now seen corresponding path program 2 times [2022-04-05 23:57:35,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:57:35,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225238054] [2022-04-05 23:57:35,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:57:35,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:57:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:35,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:57:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:35,989 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:57:35,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:57:35,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225238054] [2022-04-05 23:57:35,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225238054] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:57:35,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203177666] [2022-04-05 23:57:35,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 23:57:35,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:57:35,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:57:35,990 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) [2022-04-05 23:57:35,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 23:57:36,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 23:57:36,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 23:57:36,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-05 23:57:36,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:57:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:57:36,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 23:57:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:57:36,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203177666] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 23:57:36,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 23:57:36,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-05 23:57:36,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231738507] [2022-04-05 23:57:36,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 23:57:36,179 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 23:57:36,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:57:36,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 23:57:36,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-04-05 23:57:36,180 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2022-04-05 23:57:36,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:57:36,255 INFO L93 Difference]: Finished difference Result 329 states and 437 transitions. [2022-04-05 23:57:36,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 23:57:36,255 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 26 [2022-04-05 23:57:36,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:57:36,256 INFO L225 Difference]: With dead ends: 329 [2022-04-05 23:57:36,256 INFO L226 Difference]: Without dead ends: 235 [2022-04-05 23:57:36,257 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-04-05 23:57:36,257 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 23:57:36,258 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 36 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 23:57:36,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-04-05 23:57:36,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2022-04-05 23:57:36,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 198 states have (on average 1.2171717171717171) internal successors, (241), 199 states have internal predecessors, (241), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 23:57:36,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 250 transitions. [2022-04-05 23:57:36,273 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 250 transitions. Word has length 26 [2022-04-05 23:57:36,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:57:36,273 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 250 transitions. [2022-04-05 23:57:36,273 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2022-04-05 23:57:36,273 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 250 transitions. [2022-04-05 23:57:36,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-05 23:57:36,274 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:57:36,274 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:57:36,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 23:57:36,479 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 [2022-04-05 23:57:36,479 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:57:36,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:57:36,480 INFO L85 PathProgramCache]: Analyzing trace with hash 912885445, now seen corresponding path program 3 times [2022-04-05 23:57:36,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:57:36,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187989704] [2022-04-05 23:57:36,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:57:36,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:57:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:36,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:57:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:57:36,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:57:36,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187989704] [2022-04-05 23:57:36,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187989704] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:57:36,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303508991] [2022-04-05 23:57:36,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 23:57:36,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:57:36,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:57:36,588 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) [2022-04-05 23:57:36,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 23:57:36,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 23:57:36,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 23:57:36,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 23:57:36,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:57:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-04-05 23:57:36,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 23:57:36,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303508991] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 23:57:36,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 23:57:36,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [14] total 21 [2022-04-05 23:57:36,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997920557] [2022-04-05 23:57:36,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 23:57:36,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 23:57:36,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:57:36,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 23:57:36,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-04-05 23:57:36,871 INFO L87 Difference]: Start difference. First operand 208 states and 250 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:57:36,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:57:36,925 INFO L93 Difference]: Finished difference Result 349 states and 411 transitions. [2022-04-05 23:57:36,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 23:57:36,926 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-05 23:57:36,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:57:36,927 INFO L225 Difference]: With dead ends: 349 [2022-04-05 23:57:36,927 INFO L226 Difference]: Without dead ends: 347 [2022-04-05 23:57:36,928 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-04-05 23:57:36,929 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 23:57:36,929 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 70 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 23:57:36,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-04-05 23:57:36,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 344. [2022-04-05 23:57:36,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 328 states have (on average 1.1859756097560976) internal successors, (389), 331 states have internal predecessors, (389), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 23:57:36,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 404 transitions. [2022-04-05 23:57:36,974 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 404 transitions. Word has length 44 [2022-04-05 23:57:36,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:57:36,975 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 404 transitions. [2022-04-05 23:57:36,976 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:57:36,976 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 404 transitions. [2022-04-05 23:57:36,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-05 23:57:36,983 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:57:36,983 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:57:36,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 23:57:37,183 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 [2022-04-05 23:57:37,184 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:57:37,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:57:37,184 INFO L85 PathProgramCache]: Analyzing trace with hash -218798013, now seen corresponding path program 1 times [2022-04-05 23:57:37,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:57:37,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193054898] [2022-04-05 23:57:37,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:57:37,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:57:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:37,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:57:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:57:37,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:57:37,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193054898] [2022-04-05 23:57:37,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193054898] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:57:37,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427868773] [2022-04-05 23:57:37,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:57:37,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:57:37,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:57:37,280 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) [2022-04-05 23:57:37,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 23:57:37,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:37,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 23:57:37,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:57:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:57:37,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 23:57:37,629 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:57:37,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427868773] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 23:57:37,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 23:57:37,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-05 23:57:37,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904260606] [2022-04-05 23:57:37,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 23:57:37,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-05 23:57:37,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:57:37,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-05 23:57:37,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-04-05 23:57:37,631 INFO L87 Difference]: Start difference. First operand 344 states and 404 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 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) [2022-04-05 23:57:37,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:57:37,761 INFO L93 Difference]: Finished difference Result 1004 states and 1301 transitions. [2022-04-05 23:57:37,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-05 23:57:37,761 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 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 44 [2022-04-05 23:57:37,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:57:37,765 INFO L225 Difference]: With dead ends: 1004 [2022-04-05 23:57:37,766 INFO L226 Difference]: Without dead ends: 778 [2022-04-05 23:57:37,769 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-04-05 23:57:37,769 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 136 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 23:57:37,769 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 36 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 23:57:37,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-04-05 23:57:37,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 704. [2022-04-05 23:57:37,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 688 states have (on average 1.1584302325581395) internal successors, (797), 691 states have internal predecessors, (797), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 23:57:37,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 812 transitions. [2022-04-05 23:57:37,803 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 812 transitions. Word has length 44 [2022-04-05 23:57:37,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:57:37,803 INFO L478 AbstractCegarLoop]: Abstraction has 704 states and 812 transitions. [2022-04-05 23:57:37,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 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) [2022-04-05 23:57:37,803 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 812 transitions. [2022-04-05 23:57:37,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-05 23:57:37,805 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:57:37,805 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:57:37,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 23:57:38,019 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 [2022-04-05 23:57:38,020 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:57:38,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:57:38,020 INFO L85 PathProgramCache]: Analyzing trace with hash -120804733, now seen corresponding path program 2 times [2022-04-05 23:57:38,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:57:38,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020783417] [2022-04-05 23:57:38,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:57:38,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:57:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:38,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:57:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:57:38,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:57:38,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020783417] [2022-04-05 23:57:38,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020783417] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:57:38,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155523998] [2022-04-05 23:57:38,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 23:57:38,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:57:38,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:57:38,306 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) [2022-04-05 23:57:38,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 23:57:38,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 23:57:38,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 23:57:38,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-05 23:57:38,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:57:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:57:38,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 23:57:39,170 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:57:39,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155523998] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 23:57:39,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 23:57:39,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 53 [2022-04-05 23:57:39,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547902049] [2022-04-05 23:57:39,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 23:57:39,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-05 23:57:39,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:57:39,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-05 23:57:39,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1142, Invalid=1614, Unknown=0, NotChecked=0, Total=2756 [2022-04-05 23:57:39,173 INFO L87 Difference]: Start difference. First operand 704 states and 812 transitions. Second operand has 53 states, 53 states have (on average 2.9056603773584904) internal successors, (154), 52 states have internal predecessors, (154), 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) [2022-04-05 23:57:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:57:41,321 INFO L93 Difference]: Finished difference Result 2412 states and 3167 transitions. [2022-04-05 23:57:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-04-05 23:57:41,321 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.9056603773584904) internal successors, (154), 52 states have internal predecessors, (154), 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 80 [2022-04-05 23:57:41,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:57:41,326 INFO L225 Difference]: With dead ends: 2412 [2022-04-05 23:57:41,327 INFO L226 Difference]: Without dead ends: 1970 [2022-04-05 23:57:41,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5148 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6559, Invalid=14611, Unknown=0, NotChecked=0, Total=21170 [2022-04-05 23:57:41,333 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 601 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 23:57:41,333 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 61 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 23:57:41,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2022-04-05 23:57:41,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1020. [2022-04-05 23:57:41,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1004 states have (on average 1.202191235059761) internal successors, (1207), 1007 states have internal predecessors, (1207), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 23:57:41,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1222 transitions. [2022-04-05 23:57:41,369 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1222 transitions. Word has length 80 [2022-04-05 23:57:41,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:57:41,369 INFO L478 AbstractCegarLoop]: Abstraction has 1020 states and 1222 transitions. [2022-04-05 23:57:41,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.9056603773584904) internal successors, (154), 52 states have internal predecessors, (154), 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) [2022-04-05 23:57:41,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1222 transitions. [2022-04-05 23:57:41,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-05 23:57:41,370 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:57:41,370 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:57:41,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 23:57:41,583 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 [2022-04-05 23:57:41,584 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:57:41,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:57:41,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1231591194, now seen corresponding path program 1 times [2022-04-05 23:57:41,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:57:41,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991972636] [2022-04-05 23:57:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:57:41,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:57:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:41,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:57:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:41,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2022-04-05 23:57:41,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:57:41,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991972636] [2022-04-05 23:57:41,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991972636] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 23:57:41,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 23:57:41,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 23:57:41,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167258434] [2022-04-05 23:57:41,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 23:57:41,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 23:57:41,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:57:41,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 23:57:41,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 23:57:41,674 INFO L87 Difference]: Start difference. First operand 1020 states and 1222 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-04-05 23:57:41,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:57:41,737 INFO L93 Difference]: Finished difference Result 1676 states and 2030 transitions. [2022-04-05 23:57:41,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 23:57:41,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 149 [2022-04-05 23:57:41,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:57:41,741 INFO L225 Difference]: With dead ends: 1676 [2022-04-05 23:57:41,741 INFO L226 Difference]: Without dead ends: 1031 [2022-04-05 23:57:41,742 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 23:57:41,743 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 23:57:41,744 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 40 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 23:57:41,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2022-04-05 23:57:41,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 1016. [2022-04-05 23:57:41,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1000 states have (on average 1.199) internal successors, (1199), 1003 states have internal predecessors, (1199), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 23:57:41,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1214 transitions. [2022-04-05 23:57:41,786 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1214 transitions. Word has length 149 [2022-04-05 23:57:41,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:57:41,786 INFO L478 AbstractCegarLoop]: Abstraction has 1016 states and 1214 transitions. [2022-04-05 23:57:41,787 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-04-05 23:57:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1214 transitions. [2022-04-05 23:57:41,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-04-05 23:57:41,788 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:57:41,788 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:57:41,788 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-05 23:57:41,788 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:57:41,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:57:41,789 INFO L85 PathProgramCache]: Analyzing trace with hash 687787779, now seen corresponding path program 3 times [2022-04-05 23:57:41,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:57:41,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823192409] [2022-04-05 23:57:41,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:57:41,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:57:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:42,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:57:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:42,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:57:42,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:57:42,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823192409] [2022-04-05 23:57:42,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823192409] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:57:42,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456970048] [2022-04-05 23:57:42,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 23:57:42,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:57:42,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:57:42,536 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) [2022-04-05 23:57:42,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 23:57:42,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 23:57:42,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 23:57:42,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 23:57:42,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:57:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2022-04-05 23:57:43,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 23:57:43,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456970048] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 23:57:43,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 23:57:43,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [50] total 57 [2022-04-05 23:57:43,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650161859] [2022-04-05 23:57:43,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 23:57:43,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 23:57:43,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:57:43,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 23:57:43,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1197, Invalid=1995, Unknown=0, NotChecked=0, Total=3192 [2022-04-05 23:57:43,199 INFO L87 Difference]: Start difference. First operand 1016 states and 1214 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:57:43,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:57:43,266 INFO L93 Difference]: Finished difference Result 1025 states and 1223 transitions. [2022-04-05 23:57:43,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 23:57:43,266 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-04-05 23:57:43,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:57:43,269 INFO L225 Difference]: With dead ends: 1025 [2022-04-05 23:57:43,269 INFO L226 Difference]: Without dead ends: 1023 [2022-04-05 23:57:43,270 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1201, Invalid=2105, Unknown=0, NotChecked=0, Total=3306 [2022-04-05 23:57:43,271 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 23:57:43,271 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 77 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 23:57:43,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2022-04-05 23:57:43,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1016. [2022-04-05 23:57:43,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1000 states have (on average 1.199) internal successors, (1199), 1003 states have internal predecessors, (1199), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 23:57:43,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1214 transitions. [2022-04-05 23:57:43,300 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1214 transitions. Word has length 152 [2022-04-05 23:57:43,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:57:43,301 INFO L478 AbstractCegarLoop]: Abstraction has 1016 states and 1214 transitions. [2022-04-05 23:57:43,301 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 23:57:43,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1214 transitions. [2022-04-05 23:57:43,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-04-05 23:57:43,304 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:57:43,304 INFO L499 BasicCegarLoop]: trace histogram [90, 90, 88, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:57:43,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 23:57:43,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:57:43,520 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:57:43,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:57:43,520 INFO L85 PathProgramCache]: Analyzing trace with hash -2002907996, now seen corresponding path program 1 times [2022-04-05 23:57:43,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:57:43,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444636259] [2022-04-05 23:57:43,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:57:43,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:57:43,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:44,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:57:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:44,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-05 23:57:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12202 backedges. 6169 proven. 3015 refuted. 0 times theorem prover too weak. 3018 trivial. 0 not checked. [2022-04-05 23:57:44,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:57:44,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444636259] [2022-04-05 23:57:44,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444636259] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:57:44,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457201928] [2022-04-05 23:57:44,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:57:44,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:57:44,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:57:44,340 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) [2022-04-05 23:57:44,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 23:57:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:44,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-05 23:57:44,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:57:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12202 backedges. 6167 proven. 3015 refuted. 0 times theorem prover too weak. 3020 trivial. 0 not checked. [2022-04-05 23:57:44,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 23:57:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12202 backedges. 6169 proven. 3015 refuted. 0 times theorem prover too weak. 3018 trivial. 0 not checked. [2022-04-05 23:57:46,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457201928] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 23:57:46,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 23:57:46,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-04-05 23:57:46,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698141203] [2022-04-05 23:57:46,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 23:57:46,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-04-05 23:57:46,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:57:46,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-04-05 23:57:46,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-04-05 23:57:46,957 INFO L87 Difference]: Start difference. First operand 1016 states and 1214 transitions. Second operand has 96 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 95 states have internal predecessors, (298), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 23:57:47,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:57:47,597 INFO L93 Difference]: Finished difference Result 7262 states and 8351 transitions. [2022-04-05 23:57:47,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-04-05 23:57:47,598 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 95 states have internal predecessors, (298), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 293 [2022-04-05 23:57:47,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:57:47,614 INFO L225 Difference]: With dead ends: 7262 [2022-04-05 23:57:47,614 INFO L226 Difference]: Without dead ends: 6597 [2022-04-05 23:57:47,618 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-04-05 23:57:47,619 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 807 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 23:57:47,619 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 40 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 23:57:47,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6597 states. [2022-04-05 23:57:47,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6597 to 2416. [2022-04-05 23:57:47,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 2400 states have (on average 1.1604166666666667) internal successors, (2785), 2403 states have internal predecessors, (2785), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 23:57:47,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 2800 transitions. [2022-04-05 23:57:47,755 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 2800 transitions. Word has length 293 [2022-04-05 23:57:47,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:57:47,756 INFO L478 AbstractCegarLoop]: Abstraction has 2416 states and 2800 transitions. [2022-04-05 23:57:47,756 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 95 states have internal predecessors, (298), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 23:57:47,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 2800 transitions. [2022-04-05 23:57:47,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2022-04-05 23:57:47,764 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:57:47,765 INFO L499 BasicCegarLoop]: trace histogram [184, 184, 182, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:57:47,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 23:57:47,978 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,SelfDestructingSolverStorable11 [2022-04-05 23:57:47,979 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:57:47,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:57:47,979 INFO L85 PathProgramCache]: Analyzing trace with hash -933968960, now seen corresponding path program 2 times [2022-04-05 23:57:47,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:57:47,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995818236] [2022-04-05 23:57:47,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:57:47,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:57:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:50,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:57:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:50,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2022-04-05 23:57:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 50883 backedges. 25580 proven. 12650 refuted. 0 times theorem prover too weak. 12653 trivial. 0 not checked. [2022-04-05 23:57:50,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:57:50,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995818236] [2022-04-05 23:57:50,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995818236] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:57:50,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739647312] [2022-04-05 23:57:50,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 23:57:50,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:57:50,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:57:50,630 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) [2022-04-05 23:57:50,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 23:57:50,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 23:57:50,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 23:57:50,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 94 conjunts are in the unsatisfiable core [2022-04-05 23:57:50,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:57:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 50883 backedges. 25578 proven. 12650 refuted. 0 times theorem prover too weak. 12655 trivial. 0 not checked. [2022-04-05 23:57:51,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 23:57:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 50883 backedges. 25580 proven. 12650 refuted. 0 times theorem prover too weak. 12653 trivial. 0 not checked. [2022-04-05 23:57:59,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739647312] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 23:57:59,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 23:57:59,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95, 95] total 190 [2022-04-05 23:57:59,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088791636] [2022-04-05 23:57:59,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 23:57:59,326 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2022-04-05 23:57:59,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:57:59,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2022-04-05 23:57:59,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17768, Invalid=18142, Unknown=0, NotChecked=0, Total=35910 [2022-04-05 23:57:59,332 INFO L87 Difference]: Start difference. First operand 2416 states and 2800 transitions. Second operand has 190 states, 190 states have (on average 3.0526315789473686) internal successors, (580), 189 states have internal predecessors, (580), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 23:58:03,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:58:03,454 INFO L93 Difference]: Finished difference Result 14315 states and 16490 transitions. [2022-04-05 23:58:03,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-04-05 23:58:03,455 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 190 states have (on average 3.0526315789473686) internal successors, (580), 189 states have internal predecessors, (580), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 575 [2022-04-05 23:58:03,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:58:03,495 INFO L225 Difference]: With dead ends: 14315 [2022-04-05 23:58:03,496 INFO L226 Difference]: Without dead ends: 12809 [2022-04-05 23:58:03,501 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1248 GetRequests, 1060 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=17768, Invalid=18142, Unknown=0, NotChecked=0, Total=35910 [2022-04-05 23:58:03,502 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 1351 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 23:58:03,502 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1351 Valid, 65 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 23:58:03,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12809 states. [2022-04-05 23:58:03,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12809 to 5236. [2022-04-05 23:58:03,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5236 states, 5220 states have (on average 1.1457854406130268) internal successors, (5981), 5223 states have internal predecessors, (5981), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 23:58:03,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 5996 transitions. [2022-04-05 23:58:03,949 INFO L78 Accepts]: Start accepts. Automaton has 5236 states and 5996 transitions. Word has length 575 [2022-04-05 23:58:03,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:58:03,949 INFO L478 AbstractCegarLoop]: Abstraction has 5236 states and 5996 transitions. [2022-04-05 23:58:03,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 190 states have (on average 3.0526315789473686) internal successors, (580), 189 states have internal predecessors, (580), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 23:58:03,949 INFO L276 IsEmpty]: Start isEmpty. Operand 5236 states and 5996 transitions. [2022-04-05 23:58:03,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1140 [2022-04-05 23:58:03,974 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:58:03,975 INFO L499 BasicCegarLoop]: trace histogram [372, 372, 370, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:58:03,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 23:58:04,190 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,SelfDestructingSolverStorable12 [2022-04-05 23:58:04,190 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:58:04,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:58:04,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1062528000, now seen corresponding path program 3 times [2022-04-05 23:58:04,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:58:04,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250987472] [2022-04-05 23:58:04,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:58:04,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:58:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:58:14,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:58:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:58:14,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 568 [2022-04-05 23:58:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:58:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 207769 backedges. 104164 proven. 51801 refuted. 0 times theorem prover too weak. 51804 trivial. 0 not checked. [2022-04-05 23:58:14,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:58:14,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250987472] [2022-04-05 23:58:14,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250987472] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:58:14,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821242388] [2022-04-05 23:58:14,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 23:58:14,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:58:14,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:58:14,198 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) [2022-04-05 23:58:14,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 23:58:14,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 23:58:14,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 23:58:14,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 23:58:14,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 23:58:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 207769 backedges. 558 proven. 104165 refuted. 0 times theorem prover too weak. 103046 trivial. 0 not checked. [2022-04-05 23:58:18,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 23:58:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 207769 backedges. 5 proven. 1115 refuted. 0 times theorem prover too weak. 206649 trivial. 0 not checked. [2022-04-05 23:58:20,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821242388] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 23:58:20,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 23:58:20,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [190, 10, 8] total 202 [2022-04-05 23:58:20,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837787498] [2022-04-05 23:58:20,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 23:58:20,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 202 states [2022-04-05 23:58:20,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:58:20,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2022-04-05 23:58:20,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18187, Invalid=22415, Unknown=0, NotChecked=0, Total=40602 [2022-04-05 23:58:20,578 INFO L87 Difference]: Start difference. First operand 5236 states and 5996 transitions. Second operand has 202 states, 202 states have (on average 3.0445544554455446) internal successors, (615), 200 states have internal predecessors, (615), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 23:59:22,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:59:22,449 INFO L93 Difference]: Finished difference Result 13589 states and 15541 transitions. [2022-04-05 23:59:22,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 576 states. [2022-04-05 23:59:22,450 INFO L78 Accepts]: Start accepts. Automaton has has 202 states, 202 states have (on average 3.0445544554455446) internal successors, (615), 200 states have internal predecessors, (615), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 1139 [2022-04-05 23:59:22,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:59:22,450 INFO L225 Difference]: With dead ends: 13589 [2022-04-05 23:59:22,450 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 23:59:22,490 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 3039 GetRequests, 2268 SyntacticMatches, 3 SemanticMatches, 768 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165203 ImplicationChecksByTransitivity, 55.9s TimeCoverageRelationStatistics Valid=163348, Invalid=428782, Unknown=0, NotChecked=0, Total=592130 [2022-04-05 23:59:22,490 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 4937 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 783 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4940 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 2531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 783 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-05 23:59:22,490 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4940 Valid, 70 Invalid, 2531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [783 Valid, 1748 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-05 23:59:22,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 23:59:22,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 23:59:22,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-05 23:59:22,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 23:59:22,491 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1139 [2022-04-05 23:59:22,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:59:22,491 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 23:59:22,492 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 202 states, 202 states have (on average 3.0445544554455446) internal successors, (615), 200 states have internal predecessors, (615), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 23:59:22,492 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 23:59:22,492 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 23:59:22,494 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 23:59:22,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-05 23:59:22,707 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,SelfDestructingSolverStorable13 [2022-04-05 23:59:22,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.