/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 23:12:39,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 23:12:39,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 23:12:39,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 23:12:39,167 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-19 23:12:39,186 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 23:12:39,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 23:12:39,187 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 23:12:39,187 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 23:12:39,189 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 23:12:39,189 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 23:12:39,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 23:12:39,191 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 23:12:39,191 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 23:12:39,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 23:12:39,192 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 23:12:39,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 23:12:39,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 23:12:39,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 23:12:39,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 23:12:39,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 23:12:39,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 23:12:39,193 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 23:12:39,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 23:12:39,193 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 23:12:39,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 23:12:39,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 23:12:39,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 23:12:39,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 23:12:39,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:12:39,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 23:12:39,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 23:12:39,194 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 23:12:39,194 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 23:12:39,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 23:12:39,194 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 23:12:39,195 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 23:12:39,195 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 23:12:39,195 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 23:12:39,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 23:12:39,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 23:12:39,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 23:12:39,458 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 23:12:39,458 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 23:12:39,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c [2022-03-19 23:12:39,519 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/667ee62f4/c0828e4e27bf4189938ddb4735a7ab18/FLAGfbfd4c3bf [2022-03-19 23:12:39,899 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 23:12:39,900 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c [2022-03-19 23:12:39,903 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/667ee62f4/c0828e4e27bf4189938ddb4735a7ab18/FLAGfbfd4c3bf [2022-03-19 23:12:39,911 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/667ee62f4/c0828e4e27bf4189938ddb4735a7ab18 [2022-03-19 23:12:39,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 23:12:39,913 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 23:12:39,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 23:12:39,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 23:12:39,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 23:12:39,917 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:12:39" (1/1) ... [2022-03-19 23:12:39,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e7f8fc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:12:39, skipping insertion in model container [2022-03-19 23:12:39,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:12:39" (1/1) ... [2022-03-19 23:12:39,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 23:12:39,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 23:12:40,079 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c[318,331] [2022-03-19 23:12:40,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:12:40,090 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 23:12:40,098 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c[318,331] [2022-03-19 23:12:40,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:12:40,108 INFO L208 MainTranslator]: Completed translation [2022-03-19 23:12:40,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:12:40 WrapperNode [2022-03-19 23:12:40,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 23:12:40,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 23:12:40,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 23:12:40,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 23:12:40,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:12:40" (1/1) ... [2022-03-19 23:12:40,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:12:40" (1/1) ... [2022-03-19 23:12:40,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:12:40" (1/1) ... [2022-03-19 23:12:40,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:12:40" (1/1) ... [2022-03-19 23:12:40,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:12:40" (1/1) ... [2022-03-19 23:12:40,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:12:40" (1/1) ... [2022-03-19 23:12:40,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:12:40" (1/1) ... [2022-03-19 23:12:40,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 23:12:40,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 23:12:40,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 23:12:40,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 23:12:40,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:12:40" (1/1) ... [2022-03-19 23:12:40,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:12:40,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:12:40,156 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 23:12:40,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 23:12:40,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 23:12:40,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 23:12:40,211 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 23:12:40,211 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 23:12:40,211 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 23:12:40,211 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 23:12:40,211 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 23:12:40,211 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 23:12:40,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 23:12:40,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 23:12:40,211 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 23:12:40,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 23:12:40,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 23:12:40,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 23:12:40,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 23:12:40,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 23:12:40,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 23:12:40,249 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 23:12:40,250 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 23:12:40,357 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 23:12:40,360 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 23:12:40,361 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 23:12:40,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:12:40 BoogieIcfgContainer [2022-03-19 23:12:40,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 23:12:40,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 23:12:40,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 23:12:40,377 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 23:12:40,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:12:39" (1/3) ... [2022-03-19 23:12:40,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a09a454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:12:40, skipping insertion in model container [2022-03-19 23:12:40,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:12:40" (2/3) ... [2022-03-19 23:12:40,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a09a454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:12:40, skipping insertion in model container [2022-03-19 23:12:40,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:12:40" (3/3) ... [2022-03-19 23:12:40,379 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_9.c [2022-03-19 23:12:40,382 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 23:12:40,382 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 23:12:40,446 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 23:12:40,452 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 23:12:40,453 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 23:12:40,471 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:12:40,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 23:12:40,478 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:12:40,478 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:12:40,479 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:12:40,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:12:40,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1325153485, now seen corresponding path program 1 times [2022-03-19 23:12:40,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:12:40,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764205400] [2022-03-19 23:12:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:12:40,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:12:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:40,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:12:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:40,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:12:40,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:12:40,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764205400] [2022-03-19 23:12:40,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764205400] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:12:40,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:12:40,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 23:12:40,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986141007] [2022-03-19 23:12:40,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:12:40,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 23:12:40,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:12:40,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 23:12:40,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:12:40,619 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:40,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:12:40,649 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-19 23:12:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 23:12:40,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-03-19 23:12:40,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:12:40,656 INFO L225 Difference]: With dead ends: 32 [2022-03-19 23:12:40,656 INFO L226 Difference]: Without dead ends: 13 [2022-03-19 23:12:40,658 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:12:40,662 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:12:40,663 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:12:40,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-19 23:12:40,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-19 23:12:40,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:40,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-03-19 23:12:40,684 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-03-19 23:12:40,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:12:40,685 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-03-19 23:12:40,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:40,685 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-03-19 23:12:40,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 23:12:40,686 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:12:40,686 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:12:40,686 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 23:12:40,687 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:12:40,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:12:40,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 1 times [2022-03-19 23:12:40,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:12:40,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426692243] [2022-03-19 23:12:40,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:12:40,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:12:40,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:40,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:12:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:12:40,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:12:40,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426692243] [2022-03-19 23:12:40,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426692243] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:12:40,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:12:40,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:12:40,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741424115] [2022-03-19 23:12:40,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:12:40,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:12:40,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:12:40,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:12:40,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:12:40,750 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:40,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:12:40,785 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-03-19 23:12:40,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:12:40,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2022-03-19 23:12:40,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:12:40,786 INFO L225 Difference]: With dead ends: 22 [2022-03-19 23:12:40,787 INFO L226 Difference]: Without dead ends: 15 [2022-03-19 23:12:40,789 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:12:40,790 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:12:40,790 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:12:40,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-19 23:12:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-19 23:12:40,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:40,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-19 23:12:40,793 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-03-19 23:12:40,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:12:40,794 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-19 23:12:40,794 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:40,794 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-19 23:12:40,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-19 23:12:40,794 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:12:40,794 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:12:40,794 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 23:12:40,795 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:12:40,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:12:40,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1372110560, now seen corresponding path program 1 times [2022-03-19 23:12:40,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:12:40,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070527339] [2022-03-19 23:12:40,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:12:40,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:12:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:40,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:12:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:12:40,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:12:40,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070527339] [2022-03-19 23:12:40,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070527339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:12:40,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930720264] [2022-03-19 23:12:40,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:12:40,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:12:40,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:12:40,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:12:40,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 23:12:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:40,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 23:12:40,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:12:40,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:12:40,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:12:41,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:12:41,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930720264] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:12:41,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:12:41,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-19 23:12:41,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695070248] [2022-03-19 23:12:41,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:12:41,027 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 23:12:41,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:12:41,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 23:12:41,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-19 23:12:41,030 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:41,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:12:41,109 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2022-03-19 23:12:41,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 23:12:41,110 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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 13 [2022-03-19 23:12:41,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:12:41,110 INFO L225 Difference]: With dead ends: 27 [2022-03-19 23:12:41,111 INFO L226 Difference]: Without dead ends: 20 [2022-03-19 23:12:41,112 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:12:41,113 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:12:41,115 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:12:41,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-19 23:12:41,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-19 23:12:41,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:41,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-03-19 23:12:41,121 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2022-03-19 23:12:41,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:12:41,121 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-03-19 23:12:41,121 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:41,121 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-03-19 23:12:41,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-19 23:12:41,122 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:12:41,122 INFO L499 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:12:41,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 23:12:41,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:12:41,331 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:12:41,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:12:41,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1212152141, now seen corresponding path program 1 times [2022-03-19 23:12:41,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:12:41,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000713952] [2022-03-19 23:12:41,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:12:41,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:12:41,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:41,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:12:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:12:41,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:12:41,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000713952] [2022-03-19 23:12:41,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000713952] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:12:41,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328484960] [2022-03-19 23:12:41,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:12:41,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:12:41,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:12:41,389 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:12:41,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 23:12:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:41,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 23:12:41,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:12:41,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:12:41,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:12:41,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:12:41,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328484960] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:12:41,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:12:41,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-19 23:12:41,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127642274] [2022-03-19 23:12:41,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:12:41,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 23:12:41,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:12:41,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 23:12:41,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-19 23:12:41,553 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:41,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:12:41,665 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-03-19 23:12:41,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 23:12:41,666 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-19 23:12:41,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:12:41,668 INFO L225 Difference]: With dead ends: 38 [2022-03-19 23:12:41,668 INFO L226 Difference]: Without dead ends: 28 [2022-03-19 23:12:41,671 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-19 23:12:41,673 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:12:41,674 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 39 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:12:41,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-19 23:12:41,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-19 23:12:41,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:41,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-03-19 23:12:41,684 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2022-03-19 23:12:41,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:12:41,684 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-03-19 23:12:41,684 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:41,684 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-03-19 23:12:41,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 23:12:41,685 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:12:41,685 INFO L499 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:12:41,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 23:12:41,892 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,SelfDestructingSolverStorable3 [2022-03-19 23:12:41,893 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:12:41,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:12:41,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1751481511, now seen corresponding path program 2 times [2022-03-19 23:12:41,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:12:41,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062115433] [2022-03-19 23:12:41,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:12:41,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:12:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:41,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:12:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:12:41,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:12:41,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062115433] [2022-03-19 23:12:41,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062115433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:12:41,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281334857] [2022-03-19 23:12:41,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:12:41,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:12:41,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:12:41,974 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:12:41,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 23:12:42,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:12:42,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:12:42,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 23:12:42,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:12:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:12:42,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:12:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:12:42,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281334857] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:12:42,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:12:42,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-19 23:12:42,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562620918] [2022-03-19 23:12:42,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:12:42,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 23:12:42,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:12:42,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 23:12:42,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-19 23:12:42,225 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:42,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:12:42,390 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-03-19 23:12:42,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 23:12:42,391 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-19 23:12:42,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:12:42,391 INFO L225 Difference]: With dead ends: 54 [2022-03-19 23:12:42,391 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 23:12:42,392 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-03-19 23:12:42,392 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:12:42,393 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 39 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:12:42,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 23:12:42,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-19 23:12:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:42,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-03-19 23:12:42,397 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 27 [2022-03-19 23:12:42,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:12:42,397 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-03-19 23:12:42,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:42,398 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-03-19 23:12:42,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 23:12:42,398 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:12:42,398 INFO L499 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:12:42,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 23:12:42,620 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:12:42,620 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:12:42,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:12:42,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2029859697, now seen corresponding path program 3 times [2022-03-19 23:12:42,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:12:42,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330609278] [2022-03-19 23:12:42,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:12:42,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:12:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:42,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:12:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:12:42,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:12:42,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330609278] [2022-03-19 23:12:42,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330609278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:12:42,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739566014] [2022-03-19 23:12:42,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:12:42,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:12:42,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:12:42,805 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:12:42,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 23:12:42,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-19 23:12:42,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:12:42,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 23:12:42,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:12:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-03-19 23:12:42,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:12:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-03-19 23:12:43,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739566014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:12:43,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:12:43,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 24 [2022-03-19 23:12:43,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281641082] [2022-03-19 23:12:43,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:12:43,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 23:12:43,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:12:43,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 23:12:43,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-03-19 23:12:43,041 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:43,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:12:43,369 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2022-03-19 23:12:43,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 23:12:43,369 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 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 43 [2022-03-19 23:12:43,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:12:43,370 INFO L225 Difference]: With dead ends: 64 [2022-03-19 23:12:43,370 INFO L226 Difference]: Without dead ends: 54 [2022-03-19 23:12:43,371 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 23:12:43,372 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:12:43,372 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 23 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:12:43,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-19 23:12:43,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-19 23:12:43,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:43,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-03-19 23:12:43,377 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 43 [2022-03-19 23:12:43,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:12:43,377 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-03-19 23:12:43,377 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:43,377 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-03-19 23:12:43,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 23:12:43,378 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:12:43,378 INFO L499 BasicCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:12:43,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 23:12:43,578 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:12:43,579 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:12:43,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:12:43,579 INFO L85 PathProgramCache]: Analyzing trace with hash -741035816, now seen corresponding path program 4 times [2022-03-19 23:12:43,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:12:43,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15797793] [2022-03-19 23:12:43,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:12:43,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:12:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:43,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:12:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 23:12:43,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:12:43,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15797793] [2022-03-19 23:12:43,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15797793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:12:43,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463561868] [2022-03-19 23:12:43,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:12:43,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:12:43,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:12:43,760 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:12:43,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 23:12:43,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:12:43,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:12:43,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 23:12:43,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:12:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 23:12:43,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:12:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 23:12:44,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463561868] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:12:44,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:12:44,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-19 23:12:44,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625543201] [2022-03-19 23:12:44,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:12:44,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-19 23:12:44,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:12:44,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-19 23:12:44,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 23:12:44,280 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:44,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:12:44,820 INFO L93 Difference]: Finished difference Result 106 states and 135 transitions. [2022-03-19 23:12:44,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 23:12:44,821 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 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 53 [2022-03-19 23:12:44,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:12:44,821 INFO L225 Difference]: With dead ends: 106 [2022-03-19 23:12:44,821 INFO L226 Difference]: Without dead ends: 88 [2022-03-19 23:12:44,823 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 23:12:44,823 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:12:44,823 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 29 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:12:44,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-19 23:12:44,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-19 23:12:44,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:44,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2022-03-19 23:12:44,830 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 53 [2022-03-19 23:12:44,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:12:44,830 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2022-03-19 23:12:44,830 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:44,830 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2022-03-19 23:12:44,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-19 23:12:44,831 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:12:44,832 INFO L499 BasicCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:12:44,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 23:12:45,032 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:12:45,032 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:12:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:12:45,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1742869445, now seen corresponding path program 5 times [2022-03-19 23:12:45,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:12:45,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146930218] [2022-03-19 23:12:45,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:12:45,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:12:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:45,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:12:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 23:12:45,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:12:45,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146930218] [2022-03-19 23:12:45,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146930218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:12:45,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979460015] [2022-03-19 23:12:45,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:12:45,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:12:45,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:12:45,468 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:12:45,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 23:12:45,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2022-03-19 23:12:45,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:12:45,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 23:12:45,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:12:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 23:12:45,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:12:46,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 23:12:46,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979460015] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:12:46,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:12:46,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-19 23:12:46,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463022138] [2022-03-19 23:12:46,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:12:46,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-19 23:12:46,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:12:46,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-19 23:12:46,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-03-19 23:12:46,853 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:12:48,440 INFO L93 Difference]: Finished difference Result 174 states and 220 transitions. [2022-03-19 23:12:48,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-19 23:12:48,441 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 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 87 [2022-03-19 23:12:48,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:12:48,442 INFO L225 Difference]: With dead ends: 174 [2022-03-19 23:12:48,442 INFO L226 Difference]: Without dead ends: 156 [2022-03-19 23:12:48,446 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-03-19 23:12:48,446 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:12:48,447 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 34 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:12:48,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-19 23:12:48,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-03-19 23:12:48,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0463576158940397) internal successors, (158), 151 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:48,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 162 transitions. [2022-03-19 23:12:48,455 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 162 transitions. Word has length 87 [2022-03-19 23:12:48,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:12:48,455 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 162 transitions. [2022-03-19 23:12:48,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:48,456 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 162 transitions. [2022-03-19 23:12:48,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-19 23:12:48,457 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:12:48,457 INFO L499 BasicCegarLoop]: trace histogram [72, 66, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:12:48,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 23:12:48,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:12:48,671 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:12:48,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:12:48,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1740552159, now seen corresponding path program 6 times [2022-03-19 23:12:48,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:12:48,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067915274] [2022-03-19 23:12:48,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:12:48,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:12:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:50,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:12:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:50,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 737 proven. 4422 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 23:12:50,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:12:50,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067915274] [2022-03-19 23:12:50,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067915274] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:12:50,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219702344] [2022-03-19 23:12:50,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:12:50,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:12:50,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:12:50,144 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:12:50,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 23:12:50,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-03-19 23:12:50,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:12:50,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 23:12:50,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:12:50,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2022-03-19 23:12:50,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:12:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2022-03-19 23:12:51,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219702344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:12:51,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:12:51,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 9, 9] total 84 [2022-03-19 23:12:51,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793823267] [2022-03-19 23:12:51,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:12:51,122 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-19 23:12:51,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:12:51,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-19 23:12:51,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 23:12:51,125 INFO L87 Difference]: Start difference. First operand 156 states and 162 transitions. Second operand has 84 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 83 states have internal predecessors, (175), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:53,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:12:53,652 INFO L93 Difference]: Finished difference Result 192 states and 221 transitions. [2022-03-19 23:12:53,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-19 23:12:53,653 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 83 states have internal predecessors, (175), 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 155 [2022-03-19 23:12:53,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:12:53,654 INFO L225 Difference]: With dead ends: 192 [2022-03-19 23:12:53,654 INFO L226 Difference]: Without dead ends: 174 [2022-03-19 23:12:53,658 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-03-19 23:12:53,658 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 168 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:12:53,658 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 33 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:12:53,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-03-19 23:12:53,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-03-19 23:12:53,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.0887573964497042) internal successors, (184), 169 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:53,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 188 transitions. [2022-03-19 23:12:53,673 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 188 transitions. Word has length 155 [2022-03-19 23:12:53,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:12:53,673 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 188 transitions. [2022-03-19 23:12:53,673 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 83 states have internal predecessors, (175), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:12:53,673 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 188 transitions. [2022-03-19 23:12:53,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-19 23:12:53,675 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:12:53,675 INFO L499 BasicCegarLoop]: trace histogram [81, 67, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:12:53,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 23:12:53,876 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:12:53,877 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:12:53,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:12:53,877 INFO L85 PathProgramCache]: Analyzing trace with hash 223511316, now seen corresponding path program 7 times [2022-03-19 23:12:53,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:12:53,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112125783] [2022-03-19 23:12:53,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:12:53,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:12:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:55,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:12:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-19 23:12:55,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:12:55,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112125783] [2022-03-19 23:12:55,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112125783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:12:55,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976207981] [2022-03-19 23:12:55,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:12:55,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:12:55,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:12:55,378 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:12:55,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 23:12:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:12:55,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-19 23:12:55,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:12:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-19 23:12:55,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:12:59,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-19 23:12:59,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976207981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:12:59,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:12:59,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-19 23:12:59,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12588301] [2022-03-19 23:12:59,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:12:59,828 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-19 23:12:59,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:12:59,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-19 23:12:59,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-19 23:12:59,831 INFO L87 Difference]: Start difference. First operand 174 states and 188 transitions. Second operand has 140 states, 140 states have (on average 2.0428571428571427) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:13:05,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:13:05,650 INFO L93 Difference]: Finished difference Result 346 states and 443 transitions. [2022-03-19 23:13:05,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-19 23:13:05,650 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0428571428571427) internal successors, (286), 139 states have internal predecessors, (286), 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 173 [2022-03-19 23:13:05,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:13:05,651 INFO L225 Difference]: With dead ends: 346 [2022-03-19 23:13:05,651 INFO L226 Difference]: Without dead ends: 312 [2022-03-19 23:13:05,656 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=28498, Invalid=47402, Unknown=0, NotChecked=0, Total=75900 [2022-03-19 23:13:05,656 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 144 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:13:05,657 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 44 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:13:05,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-03-19 23:13:05,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2022-03-19 23:13:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 307 states have (on average 1.0488599348534202) internal successors, (322), 307 states have internal predecessors, (322), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:13:05,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 326 transitions. [2022-03-19 23:13:05,668 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 326 transitions. Word has length 173 [2022-03-19 23:13:05,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:13:05,668 INFO L478 AbstractCegarLoop]: Abstraction has 312 states and 326 transitions. [2022-03-19 23:13:05,669 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0428571428571427) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:13:05,669 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 326 transitions. [2022-03-19 23:13:05,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-03-19 23:13:05,671 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:13:05,672 INFO L499 BasicCegarLoop]: trace histogram [150, 136, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:13:05,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 23:13:05,888 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,SelfDestructingSolverStorable9 [2022-03-19 23:13:05,888 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:13:05,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:13:05,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1145596517, now seen corresponding path program 8 times [2022-03-19 23:13:05,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:13:05,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101457357] [2022-03-19 23:13:05,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:13:05,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:13:05,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:11,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:13:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-19 23:13:11,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:13:11,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101457357] [2022-03-19 23:13:11,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101457357] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:13:11,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121162841] [2022-03-19 23:13:11,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:13:11,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:13:11,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:13:11,244 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:13:11,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 23:13:11,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:13:11,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:13:11,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 138 conjunts are in the unsatisfiable core [2022-03-19 23:13:11,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:13:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-19 23:13:11,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:13:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-19 23:13:27,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121162841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:13:27,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:13:27,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-03-19 23:13:27,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388058762] [2022-03-19 23:13:27,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:13:27,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2022-03-19 23:13:27,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:13:27,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2022-03-19 23:13:27,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-03-19 23:13:27,991 INFO L87 Difference]: Start difference. First operand 312 states and 326 transitions. Second operand has 278 states, 278 states have (on average 2.0215827338129495) internal successors, (562), 277 states have internal predecessors, (562), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:13:50,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:13:50,080 INFO L93 Difference]: Finished difference Result 622 states and 788 transitions. [2022-03-19 23:13:50,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-03-19 23:13:50,080 INFO L78 Accepts]: Start accepts. Automaton has has 278 states, 278 states have (on average 2.0215827338129495) internal successors, (562), 277 states have internal predecessors, (562), 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 311 [2022-03-19 23:13:50,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:13:50,082 INFO L225 Difference]: With dead ends: 622 [2022-03-19 23:13:50,082 INFO L226 Difference]: Without dead ends: 588 [2022-03-19 23:13:50,094 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1036 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47533 ImplicationChecksByTransitivity, 41.2s TimeCoverageRelationStatistics Valid=114127, Invalid=190025, Unknown=0, NotChecked=0, Total=304152 [2022-03-19 23:13:50,095 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 282 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:13:50,095 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 44 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:13:50,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-03-19 23:13:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 588. [2022-03-19 23:13:50,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 583 states have (on average 1.0257289879931388) internal successors, (598), 583 states have internal predecessors, (598), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:13:50,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 602 transitions. [2022-03-19 23:13:50,114 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 602 transitions. Word has length 311 [2022-03-19 23:13:50,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:13:50,115 INFO L478 AbstractCegarLoop]: Abstraction has 588 states and 602 transitions. [2022-03-19 23:13:50,115 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 278 states, 278 states have (on average 2.0215827338129495) internal successors, (562), 277 states have internal predecessors, (562), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:13:50,115 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 602 transitions. [2022-03-19 23:13:50,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2022-03-19 23:13:50,125 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:13:50,125 INFO L499 BasicCegarLoop]: trace histogram [288, 274, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:13:50,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-19 23:13:50,339 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 [2022-03-19 23:13:50,339 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:13:50,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:13:50,340 INFO L85 PathProgramCache]: Analyzing trace with hash 630850887, now seen corresponding path program 9 times [2022-03-19 23:13:50,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:13:50,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020971649] [2022-03-19 23:13:50,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:13:50,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:13:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:14:11,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:14:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:14:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7425 proven. 75350 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-19 23:14:11,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:14:11,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020971649] [2022-03-19 23:14:11,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020971649] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:14:11,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563087588] [2022-03-19 23:14:11,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:14:11,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:14:11,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:14:11,195 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:14:11,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 23:14:11,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-03-19 23:14:11,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:14:11,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 23:14:11,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:14:14,215 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74802 trivial. 0 not checked. [2022-03-19 23:14:14,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:14:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74802 trivial. 0 not checked. [2022-03-19 23:14:17,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563087588] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:14:17,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:14:17,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 17, 17] total 308 [2022-03-19 23:14:17,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858319108] [2022-03-19 23:14:17,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:14:17,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 308 states [2022-03-19 23:14:17,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:14:17,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 308 interpolants. [2022-03-19 23:14:17,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46973, Invalid=47583, Unknown=0, NotChecked=0, Total=94556 [2022-03-19 23:14:17,134 INFO L87 Difference]: Start difference. First operand 588 states and 602 transitions. Second operand has 308 states, 308 states have (on average 2.022727272727273) internal successors, (623), 307 states have internal predecessors, (623), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:14:49,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:14:49,246 INFO L93 Difference]: Finished difference Result 656 states and 717 transitions. [2022-03-19 23:14:49,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 308 states. [2022-03-19 23:14:49,246 INFO L78 Accepts]: Start accepts. Automaton has has 308 states, 308 states have (on average 2.022727272727273) internal successors, (623), 307 states have internal predecessors, (623), 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 587 [2022-03-19 23:14:49,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:14:49,248 INFO L225 Difference]: With dead ends: 656 [2022-03-19 23:14:49,249 INFO L226 Difference]: Without dead ends: 622 [2022-03-19 23:14:49,262 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1786 GetRequests, 1175 SyntacticMatches, 0 SemanticMatches, 611 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46725 ImplicationChecksByTransitivity, 54.0s TimeCoverageRelationStatistics Valid=140913, Invalid=234243, Unknown=0, NotChecked=0, Total=375156 [2022-03-19 23:14:49,263 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 906 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 1275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1275 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 23:14:49,263 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 63 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1275 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 23:14:49,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-03-19 23:14:49,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2022-03-19 23:14:49,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 617 states have (on average 1.0502431118314424) internal successors, (648), 617 states have internal predecessors, (648), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:14:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 652 transitions. [2022-03-19 23:14:49,301 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 652 transitions. Word has length 587 [2022-03-19 23:14:49,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:14:49,302 INFO L478 AbstractCegarLoop]: Abstraction has 622 states and 652 transitions. [2022-03-19 23:14:49,302 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 308 states, 308 states have (on average 2.022727272727273) internal successors, (623), 307 states have internal predecessors, (623), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:14:49,302 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 652 transitions. [2022-03-19 23:14:49,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2022-03-19 23:14:49,309 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:14:49,310 INFO L499 BasicCegarLoop]: trace histogram [305, 275, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:14:49,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 23:14:49,515 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 [2022-03-19 23:14:49,515 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:14:49,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:14:49,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1905068116, now seen corresponding path program 10 times [2022-03-19 23:14:49,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:14:49,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474144288] [2022-03-19 23:14:49,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:14:49,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:14:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:15:10,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:15:10,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:15:10,463 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-19 23:15:10,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:15:10,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474144288] [2022-03-19 23:15:10,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474144288] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:15:10,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089184263] [2022-03-19 23:15:10,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:15:10,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:15:10,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:15:10,465 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:15:10,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 23:15:10,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:15:10,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:15:10,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 1333 conjuncts, 277 conjunts are in the unsatisfiable core [2022-03-19 23:15:10,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:15:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-19 23:15:11,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:16:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-19 23:16:14,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089184263] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:16:14,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:16:14,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [279, 278, 278] total 556 [2022-03-19 23:16:14,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388637074] [2022-03-19 23:16:14,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:16:14,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 556 states [2022-03-19 23:16:14,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:16:14,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 556 interpolants. [2022-03-19 23:16:14,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153737, Invalid=154843, Unknown=0, NotChecked=0, Total=308580 [2022-03-19 23:16:14,928 INFO L87 Difference]: Start difference. First operand 622 states and 652 transitions. Second operand has 556 states, 556 states have (on average 2.0107913669064748) internal successors, (1118), 555 states have internal predecessors, (1118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:17:49,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:17:49,754 INFO L93 Difference]: Finished difference Result 1242 states and 1579 transitions. [2022-03-19 23:17:49,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 555 states. [2022-03-19 23:17:49,755 INFO L78 Accepts]: Start accepts. Automaton has has 556 states, 556 states have (on average 2.0107913669064748) internal successors, (1118), 555 states have internal predecessors, (1118), 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 621 [2022-03-19 23:17:49,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:17:49,759 INFO L225 Difference]: With dead ends: 1242 [2022-03-19 23:17:49,759 INFO L226 Difference]: Without dead ends: 1176 [2022-03-19 23:17:49,821 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2073 GetRequests, 967 SyntacticMatches, 0 SemanticMatches, 1106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191676 ImplicationChecksByTransitivity, 168.2s TimeCoverageRelationStatistics Valid=460098, Invalid=766458, Unknown=0, NotChecked=0, Total=1226556 [2022-03-19 23:17:49,822 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 560 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 839 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 839 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:17:49,822 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 44 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [839 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 23:17:49,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-03-19 23:17:49,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1176. [2022-03-19 23:17:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1171 states have (on average 1.026473099914603) internal successors, (1202), 1171 states have internal predecessors, (1202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:17:49,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1206 transitions. [2022-03-19 23:17:49,848 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1206 transitions. Word has length 621 [2022-03-19 23:17:49,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:17:49,848 INFO L478 AbstractCegarLoop]: Abstraction has 1176 states and 1206 transitions. [2022-03-19 23:17:49,849 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 556 states, 556 states have (on average 2.0107913669064748) internal successors, (1118), 555 states have internal predecessors, (1118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:17:49,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1206 transitions. [2022-03-19 23:17:49,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1176 [2022-03-19 23:17:49,859 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:17:49,859 INFO L499 BasicCegarLoop]: trace histogram [582, 552, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:17:49,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 23:17:50,076 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 [2022-03-19 23:17:50,076 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:17:50,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:17:50,077 INFO L85 PathProgramCache]: Analyzing trace with hash 143478069, now seen corresponding path program 11 times [2022-03-19 23:17:50,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:17:50,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059053619] [2022-03-19 23:17:50,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:17:50,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:17:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:19:15,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:19:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:19:15,859 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-19 23:19:15,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:19:15,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059053619] [2022-03-19 23:19:15,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059053619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:19:15,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534609721] [2022-03-19 23:19:15,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:19:15,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:19:15,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:19:15,861 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:19:15,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 23:19:18,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 583 check-sat command(s) [2022-03-19 23:19:18,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:19:18,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 2441 conjuncts, 554 conjunts are in the unsatisfiable core [2022-03-19 23:19:18,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:19:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-19 23:19:19,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:23:37,989 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-19 23:23:37,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534609721] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:23:37,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:23:37,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [556, 555, 555] total 1110 [2022-03-19 23:23:37,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577027871] [2022-03-19 23:23:37,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:23:37,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 1110 states [2022-03-19 23:23:37,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:23:38,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1110 interpolants. [2022-03-19 23:23:38,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614388, Invalid=616602, Unknown=0, NotChecked=0, Total=1230990 [2022-03-19 23:23:38,133 INFO L87 Difference]: Start difference. First operand 1176 states and 1206 transitions. Second operand has 1110 states, 1110 states have (on average 2.0054054054054054) internal successors, (2226), 1109 states have internal predecessors, (2226), 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)