/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/heapsort.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 02:37:04,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 02:37:04,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 02:37:04,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 02:37:04,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 02:37:04,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 02:37:04,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 02:37:04,932 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 02:37:04,945 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 02:37:04,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 02:37:04,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 02:37:04,946 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 02:37:04,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 02:37:04,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 02:37:04,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 02:37:04,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 02:37:04,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 02:37:04,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 02:37:04,948 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 02:37:04,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 02:37:04,948 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 02:37:04,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 02:37:04,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 02:37:04,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 02:37:04,948 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 02:37:04,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 02:37:04,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 02:37:04,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 02:37:04,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 02:37:04,949 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 02:37:04,949 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 02:37:04,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 02:37:04,949 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 02:37:04,949 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 02:37:05,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 02:37:05,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 02:37:05,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 02:37:05,233 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 02:37:05,239 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 02:37:05,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/heapsort.i [2022-03-19 02:37:05,304 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/354247b59/f086389370bb4034bfdf80b7d4112ccc/FLAGd8166cfc2 [2022-03-19 02:37:05,697 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 02:37:05,697 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/heapsort.i [2022-03-19 02:37:05,707 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/354247b59/f086389370bb4034bfdf80b7d4112ccc/FLAGd8166cfc2 [2022-03-19 02:37:06,098 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/354247b59/f086389370bb4034bfdf80b7d4112ccc [2022-03-19 02:37:06,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 02:37:06,101 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 02:37:06,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 02:37:06,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 02:37:06,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 02:37:06,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 02:37:06" (1/1) ... [2022-03-19 02:37:06,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@93ab441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:37:06, skipping insertion in model container [2022-03-19 02:37:06,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 02:37:06" (1/1) ... [2022-03-19 02:37:06,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 02:37:06,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 02:37:06,291 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/heapsort.i[893,906] [2022-03-19 02:37:06,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 02:37:06,312 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 02:37:06,322 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/heapsort.i[893,906] [2022-03-19 02:37:06,329 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 02:37:06,340 INFO L208 MainTranslator]: Completed translation [2022-03-19 02:37:06,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:37:06 WrapperNode [2022-03-19 02:37:06,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 02:37:06,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 02:37:06,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 02:37:06,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 02:37:06,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:37:06" (1/1) ... [2022-03-19 02:37:06,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:37:06" (1/1) ... [2022-03-19 02:37:06,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:37:06" (1/1) ... [2022-03-19 02:37:06,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:37:06" (1/1) ... [2022-03-19 02:37:06,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:37:06" (1/1) ... [2022-03-19 02:37:06,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:37:06" (1/1) ... [2022-03-19 02:37:06,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:37:06" (1/1) ... [2022-03-19 02:37:06,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 02:37:06,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 02:37:06,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 02:37:06,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 02:37:06,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:37:06" (1/1) ... [2022-03-19 02:37:06,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 02:37:06,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:37:06,409 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 02:37:06,411 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 02:37:06,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 02:37:06,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 02:37:06,443 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 02:37:06,443 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 02:37:06,443 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 02:37:06,444 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 02:37:06,444 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 02:37:06,444 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 02:37:06,444 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-19 02:37:06,444 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-19 02:37:06,444 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 02:37:06,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 02:37:06,444 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 02:37:06,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 02:37:06,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 02:37:06,445 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 02:37:06,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 02:37:06,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 02:37:06,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 02:37:06,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 02:37:06,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 02:37:06,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 02:37:06,506 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 02:37:06,507 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 02:37:06,634 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 02:37:06,666 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 02:37:06,666 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 02:37:06,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 02:37:06 BoogieIcfgContainer [2022-03-19 02:37:06,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 02:37:06,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 02:37:06,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 02:37:06,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 02:37:06,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 02:37:06" (1/3) ... [2022-03-19 02:37:06,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@225bcca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 02:37:06, skipping insertion in model container [2022-03-19 02:37:06,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:37:06" (2/3) ... [2022-03-19 02:37:06,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@225bcca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 02:37:06, skipping insertion in model container [2022-03-19 02:37:06,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 02:37:06" (3/3) ... [2022-03-19 02:37:06,674 INFO L111 eAbstractionObserver]: Analyzing ICFG heapsort.i [2022-03-19 02:37:06,678 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 02:37:06,679 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 02:37:06,753 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 02:37:06,766 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 02:37:06,766 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 02:37:06,785 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 02:37:06,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 02:37:06,803 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:06,803 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:06,804 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:06,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:06,808 INFO L85 PathProgramCache]: Analyzing trace with hash -250128701, now seen corresponding path program 1 times [2022-03-19 02:37:06,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:06,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1382672152] [2022-03-19 02:37:06,832 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:37:06,833 INFO L85 PathProgramCache]: Analyzing trace with hash -250128701, now seen corresponding path program 2 times [2022-03-19 02:37:06,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:06,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348822360] [2022-03-19 02:37:06,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:06,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:07,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:07,150 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 02:37:07,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:07,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348822360] [2022-03-19 02:37:07,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348822360] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:07,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:07,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:37:07,154 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:07,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1382672152] [2022-03-19 02:37:07,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1382672152] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:07,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:07,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:37:07,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248389276] [2022-03-19 02:37:07,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:07,159 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 02:37:07,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:07,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 02:37:07,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 02:37:07,194 INFO L87 Difference]: Start difference. First operand has 44 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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 02:37:07,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:07,543 INFO L93 Difference]: Finished difference Result 88 states and 148 transitions. [2022-03-19 02:37:07,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 02:37:07,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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 15 [2022-03-19 02:37:07,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:07,551 INFO L225 Difference]: With dead ends: 88 [2022-03-19 02:37:07,551 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 02:37:07,554 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 02:37:07,557 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 55 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:07,558 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 63 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:37:07,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 02:37:07,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-03-19 02:37:07,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 02:37:07,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2022-03-19 02:37:07,597 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 15 [2022-03-19 02:37:07,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:07,597 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2022-03-19 02:37:07,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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 02:37:07,598 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2022-03-19 02:37:07,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 02:37:07,599 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:07,599 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:07,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 02:37:07,599 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:07,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:07,600 INFO L85 PathProgramCache]: Analyzing trace with hash -254865470, now seen corresponding path program 1 times [2022-03-19 02:37:07,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:07,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [238267917] [2022-03-19 02:37:07,602 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:37:07,602 INFO L85 PathProgramCache]: Analyzing trace with hash -254865470, now seen corresponding path program 2 times [2022-03-19 02:37:07,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:07,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106889406] [2022-03-19 02:37:07,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:07,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:07,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:07,665 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 02:37:07,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:07,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106889406] [2022-03-19 02:37:07,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106889406] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:07,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:07,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:37:07,667 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:07,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [238267917] [2022-03-19 02:37:07,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [238267917] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:07,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:07,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:37:07,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667641011] [2022-03-19 02:37:07,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:07,668 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 02:37:07,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:07,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 02:37:07,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 02:37:07,669 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 02:37:07,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:07,952 INFO L93 Difference]: Finished difference Result 71 states and 105 transitions. [2022-03-19 02:37:07,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 02:37:07,954 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 15 [2022-03-19 02:37:07,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:07,962 INFO L225 Difference]: With dead ends: 71 [2022-03-19 02:37:07,966 INFO L226 Difference]: Without dead ends: 69 [2022-03-19 02:37:07,967 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 02:37:07,968 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 57 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:07,968 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 56 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:37:07,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-19 02:37:07,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 47. [2022-03-19 02:37:07,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 02:37:07,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2022-03-19 02:37:07,984 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 15 [2022-03-19 02:37:07,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:07,985 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2022-03-19 02:37:07,985 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 02:37:07,985 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2022-03-19 02:37:07,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 02:37:07,986 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:07,986 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:07,986 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 02:37:07,986 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:07,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:07,987 INFO L85 PathProgramCache]: Analyzing trace with hash -216435080, now seen corresponding path program 1 times [2022-03-19 02:37:07,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:07,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [873237993] [2022-03-19 02:37:07,987 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:37:07,988 INFO L85 PathProgramCache]: Analyzing trace with hash -216435080, now seen corresponding path program 2 times [2022-03-19 02:37:07,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:07,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314279263] [2022-03-19 02:37:07,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:07,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:08,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:08,068 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 02:37:08,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:08,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314279263] [2022-03-19 02:37:08,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314279263] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:08,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:08,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:37:08,069 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:08,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [873237993] [2022-03-19 02:37:08,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [873237993] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:08,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:08,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:37:08,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629110909] [2022-03-19 02:37:08,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:08,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 02:37:08,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:08,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 02:37:08,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-19 02:37:08,071 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 02:37:08,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:08,419 INFO L93 Difference]: Finished difference Result 80 states and 115 transitions. [2022-03-19 02:37:08,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 02:37:08,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 15 [2022-03-19 02:37:08,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:08,422 INFO L225 Difference]: With dead ends: 80 [2022-03-19 02:37:08,422 INFO L226 Difference]: Without dead ends: 78 [2022-03-19 02:37:08,422 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-19 02:37:08,424 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 68 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:08,424 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 65 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:37:08,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-19 02:37:08,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2022-03-19 02:37:08,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 36 states have internal predecessors, (47), 26 states have call successors, (26), 6 states have call predecessors, (26), 5 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 02:37:08,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 98 transitions. [2022-03-19 02:37:08,441 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 98 transitions. Word has length 15 [2022-03-19 02:37:08,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:08,442 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 98 transitions. [2022-03-19 02:37:08,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 02:37:08,442 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 98 transitions. [2022-03-19 02:37:08,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 02:37:08,443 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:08,443 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:08,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 02:37:08,443 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:08,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:08,444 INFO L85 PathProgramCache]: Analyzing trace with hash -228679181, now seen corresponding path program 1 times [2022-03-19 02:37:08,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:08,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1285788427] [2022-03-19 02:37:08,445 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:37:08,445 INFO L85 PathProgramCache]: Analyzing trace with hash -228679181, now seen corresponding path program 2 times [2022-03-19 02:37:08,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:08,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074622427] [2022-03-19 02:37:08,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:08,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:08,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:08,499 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 02:37:08,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:08,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074622427] [2022-03-19 02:37:08,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074622427] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:08,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:08,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:37:08,501 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:08,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1285788427] [2022-03-19 02:37:08,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1285788427] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:08,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:08,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:37:08,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921225480] [2022-03-19 02:37:08,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:08,502 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 02:37:08,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:08,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 02:37:08,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-19 02:37:08,503 INFO L87 Difference]: Start difference. First operand 68 states and 98 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 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 02:37:08,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:08,793 INFO L93 Difference]: Finished difference Result 122 states and 183 transitions. [2022-03-19 02:37:08,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 02:37:08,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 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 15 [2022-03-19 02:37:08,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:08,796 INFO L225 Difference]: With dead ends: 122 [2022-03-19 02:37:08,796 INFO L226 Difference]: Without dead ends: 120 [2022-03-19 02:37:08,797 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-19 02:37:08,798 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 65 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:08,798 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 56 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:37:08,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-19 02:37:08,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 94. [2022-03-19 02:37:08,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 49 states have internal predecessors, (65), 38 states have call successors, (38), 7 states have call predecessors, (38), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-19 02:37:08,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 140 transitions. [2022-03-19 02:37:08,821 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 140 transitions. Word has length 15 [2022-03-19 02:37:08,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:08,821 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 140 transitions. [2022-03-19 02:37:08,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 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 02:37:08,822 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 140 transitions. [2022-03-19 02:37:08,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 02:37:08,822 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:08,823 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:08,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 02:37:08,823 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:08,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:08,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1266022048, now seen corresponding path program 1 times [2022-03-19 02:37:08,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:08,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [578661400] [2022-03-19 02:37:08,824 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:37:08,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1266022048, now seen corresponding path program 2 times [2022-03-19 02:37:08,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:08,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626530656] [2022-03-19 02:37:08,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:08,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:08,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:08,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 02:37:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:37:08,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:08,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626530656] [2022-03-19 02:37:08,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626530656] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:08,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:08,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:37:08,900 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:08,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [578661400] [2022-03-19 02:37:08,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [578661400] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:08,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:08,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:37:08,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028527063] [2022-03-19 02:37:08,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:08,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 02:37:08,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:08,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 02:37:08,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 02:37:08,902 INFO L87 Difference]: Start difference. First operand 94 states and 140 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:37:09,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:09,082 INFO L93 Difference]: Finished difference Result 100 states and 145 transitions. [2022-03-19 02:37:09,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 02:37:09,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-19 02:37:09,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:09,084 INFO L225 Difference]: With dead ends: 100 [2022-03-19 02:37:09,084 INFO L226 Difference]: Without dead ends: 98 [2022-03-19 02:37:09,085 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 02:37:09,086 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 39 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:09,095 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 55 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:37:09,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-19 02:37:09,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-03-19 02:37:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 38 states have call successors, (38), 8 states have call predecessors, (38), 7 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-19 02:37:09,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 143 transitions. [2022-03-19 02:37:09,130 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 143 transitions. Word has length 20 [2022-03-19 02:37:09,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:09,130 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 143 transitions. [2022-03-19 02:37:09,130 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:37:09,130 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 143 transitions. [2022-03-19 02:37:09,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 02:37:09,133 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:09,133 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:09,133 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-19 02:37:09,133 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:09,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:09,134 INFO L85 PathProgramCache]: Analyzing trace with hash 884659585, now seen corresponding path program 1 times [2022-03-19 02:37:09,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:09,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1186538821] [2022-03-19 02:37:09,134 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:37:09,135 INFO L85 PathProgramCache]: Analyzing trace with hash 884659585, now seen corresponding path program 2 times [2022-03-19 02:37:09,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:09,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268271651] [2022-03-19 02:37:09,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:09,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:09,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:09,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 02:37:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:37:09,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:09,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268271651] [2022-03-19 02:37:09,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268271651] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:09,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:09,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:37:09,227 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:09,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1186538821] [2022-03-19 02:37:09,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1186538821] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:09,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:09,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:37:09,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552712833] [2022-03-19 02:37:09,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:09,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 02:37:09,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:09,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 02:37:09,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-19 02:37:09,228 INFO L87 Difference]: Start difference. First operand 98 states and 143 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:37:09,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:09,554 INFO L93 Difference]: Finished difference Result 131 states and 194 transitions. [2022-03-19 02:37:09,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 02:37:09,555 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-19 02:37:09,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:09,558 INFO L225 Difference]: With dead ends: 131 [2022-03-19 02:37:09,558 INFO L226 Difference]: Without dead ends: 129 [2022-03-19 02:37:09,558 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-19 02:37:09,562 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 86 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:09,562 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 63 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:37:09,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-19 02:37:09,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2022-03-19 02:37:09,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 65 states have (on average 1.323076923076923) internal successors, (86), 66 states have internal predecessors, (86), 52 states have call successors, (52), 9 states have call predecessors, (52), 8 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-19 02:37:09,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 189 transitions. [2022-03-19 02:37:09,617 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 189 transitions. Word has length 20 [2022-03-19 02:37:09,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:09,618 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 189 transitions. [2022-03-19 02:37:09,618 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:37:09,618 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 189 transitions. [2022-03-19 02:37:09,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 02:37:09,622 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:09,622 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:09,623 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-19 02:37:09,623 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:09,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:09,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1424204299, now seen corresponding path program 1 times [2022-03-19 02:37:09,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:09,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [597900386] [2022-03-19 02:37:09,624 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:37:09,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1424204299, now seen corresponding path program 2 times [2022-03-19 02:37:09,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:09,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290603444] [2022-03-19 02:37:09,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:09,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:09,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:09,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 02:37:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:37:09,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:09,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290603444] [2022-03-19 02:37:09,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290603444] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:09,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:09,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:37:09,705 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:09,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [597900386] [2022-03-19 02:37:09,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [597900386] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:09,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:09,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:37:09,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185751395] [2022-03-19 02:37:09,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:09,705 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 02:37:09,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:09,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 02:37:09,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-19 02:37:09,707 INFO L87 Difference]: Start difference. First operand 126 states and 189 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:37:09,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:09,977 INFO L93 Difference]: Finished difference Result 188 states and 291 transitions. [2022-03-19 02:37:09,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 02:37:09,978 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-19 02:37:09,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:09,982 INFO L225 Difference]: With dead ends: 188 [2022-03-19 02:37:09,982 INFO L226 Difference]: Without dead ends: 186 [2022-03-19 02:37:09,983 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 02:37:09,983 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:09,984 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 65 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:37:09,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-03-19 02:37:10,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 162. [2022-03-19 02:37:10,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 76 states have (on average 1.3289473684210527) internal successors, (101), 81 states have internal predecessors, (101), 76 states have call successors, (76), 10 states have call predecessors, (76), 9 states have return successors, (75), 70 states have call predecessors, (75), 75 states have call successors, (75) [2022-03-19 02:37:10,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 252 transitions. [2022-03-19 02:37:10,042 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 252 transitions. Word has length 20 [2022-03-19 02:37:10,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:10,043 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 252 transitions. [2022-03-19 02:37:10,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:37:10,043 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 252 transitions. [2022-03-19 02:37:10,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 02:37:10,044 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:10,044 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:10,044 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-19 02:37:10,044 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:10,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:10,045 INFO L85 PathProgramCache]: Analyzing trace with hash 297853571, now seen corresponding path program 1 times [2022-03-19 02:37:10,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:10,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [121274964] [2022-03-19 02:37:10,046 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:37:10,046 INFO L85 PathProgramCache]: Analyzing trace with hash 297853571, now seen corresponding path program 2 times [2022-03-19 02:37:10,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:10,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070312775] [2022-03-19 02:37:10,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:10,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:10,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:10,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:10,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 02:37:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:10,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:37:10,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:10,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070312775] [2022-03-19 02:37:10,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070312775] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:10,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:10,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 02:37:10,087 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:10,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [121274964] [2022-03-19 02:37:10,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [121274964] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:10,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:10,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 02:37:10,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993828806] [2022-03-19 02:37:10,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:10,088 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 02:37:10,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:10,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 02:37:10,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 02:37:10,089 INFO L87 Difference]: Start difference. First operand 162 states and 252 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:37:10,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:10,248 INFO L93 Difference]: Finished difference Result 329 states and 524 transitions. [2022-03-19 02:37:10,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 02:37:10,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-19 02:37:10,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:10,251 INFO L225 Difference]: With dead ends: 329 [2022-03-19 02:37:10,251 INFO L226 Difference]: Without dead ends: 239 [2022-03-19 02:37:10,253 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 02:37:10,253 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 39 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:10,254 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 63 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:37:10,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-03-19 02:37:10,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 209. [2022-03-19 02:37:10,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 95 states have (on average 1.3578947368421053) internal successors, (129), 101 states have internal predecessors, (129), 104 states have call successors, (104), 10 states have call predecessors, (104), 9 states have return successors, (103), 97 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-19 02:37:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 336 transitions. [2022-03-19 02:37:10,322 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 336 transitions. Word has length 20 [2022-03-19 02:37:10,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:10,323 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 336 transitions. [2022-03-19 02:37:10,323 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:37:10,323 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 336 transitions. [2022-03-19 02:37:10,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 02:37:10,323 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:10,324 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:10,324 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-19 02:37:10,324 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:10,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:10,324 INFO L85 PathProgramCache]: Analyzing trace with hash 288094237, now seen corresponding path program 1 times [2022-03-19 02:37:10,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:10,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [773630905] [2022-03-19 02:37:10,325 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:37:10,325 INFO L85 PathProgramCache]: Analyzing trace with hash 288094237, now seen corresponding path program 2 times [2022-03-19 02:37:10,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:10,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022494885] [2022-03-19 02:37:10,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:10,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:10,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:10,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 02:37:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:10,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:37:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 02:37:10,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:10,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022494885] [2022-03-19 02:37:10,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022494885] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:10,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:10,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:37:10,379 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:10,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [773630905] [2022-03-19 02:37:10,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [773630905] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:10,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:10,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:37:10,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967219682] [2022-03-19 02:37:10,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:10,379 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 02:37:10,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:10,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 02:37:10,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-19 02:37:10,380 INFO L87 Difference]: Start difference. First operand 209 states and 336 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:37:10,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:10,729 INFO L93 Difference]: Finished difference Result 275 states and 448 transitions. [2022-03-19 02:37:10,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 02:37:10,729 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-03-19 02:37:10,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:10,734 INFO L225 Difference]: With dead ends: 275 [2022-03-19 02:37:10,734 INFO L226 Difference]: Without dead ends: 273 [2022-03-19 02:37:10,734 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-19 02:37:10,736 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 81 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:10,736 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 61 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:37:10,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-03-19 02:37:10,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 249. [2022-03-19 02:37:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 114 states have (on average 1.3859649122807018) internal successors, (158), 124 states have internal predecessors, (158), 124 states have call successors, (124), 11 states have call predecessors, (124), 10 states have return successors, (123), 113 states have call predecessors, (123), 123 states have call successors, (123) [2022-03-19 02:37:10,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 405 transitions. [2022-03-19 02:37:10,797 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 405 transitions. Word has length 27 [2022-03-19 02:37:10,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:10,797 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 405 transitions. [2022-03-19 02:37:10,797 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:37:10,797 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 405 transitions. [2022-03-19 02:37:10,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 02:37:10,798 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:10,798 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:10,798 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-19 02:37:10,799 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:10,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:10,799 INFO L85 PathProgramCache]: Analyzing trace with hash -870562259, now seen corresponding path program 1 times [2022-03-19 02:37:10,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:10,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [452831240] [2022-03-19 02:37:10,800 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:37:10,800 INFO L85 PathProgramCache]: Analyzing trace with hash -870562259, now seen corresponding path program 2 times [2022-03-19 02:37:10,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:10,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967240876] [2022-03-19 02:37:10,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:10,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:10,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:10,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:10,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 02:37:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:10,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:37:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 02:37:10,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:10,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967240876] [2022-03-19 02:37:10,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967240876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:10,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:10,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:37:10,862 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:10,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [452831240] [2022-03-19 02:37:10,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [452831240] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:10,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:10,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:37:10,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239969025] [2022-03-19 02:37:10,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:10,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 02:37:10,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:10,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 02:37:10,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-19 02:37:10,864 INFO L87 Difference]: Start difference. First operand 249 states and 405 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:37:11,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:11,329 INFO L93 Difference]: Finished difference Result 593 states and 971 transitions. [2022-03-19 02:37:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 02:37:11,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-03-19 02:37:11,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:11,335 INFO L225 Difference]: With dead ends: 593 [2022-03-19 02:37:11,335 INFO L226 Difference]: Without dead ends: 396 [2022-03-19 02:37:11,337 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-03-19 02:37:11,338 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 101 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:11,339 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 53 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 02:37:11,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-03-19 02:37:11,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 250. [2022-03-19 02:37:11,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 115 states have (on average 1.373913043478261) internal successors, (158), 125 states have internal predecessors, (158), 124 states have call successors, (124), 11 states have call predecessors, (124), 10 states have return successors, (123), 113 states have call predecessors, (123), 123 states have call successors, (123) [2022-03-19 02:37:11,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 405 transitions. [2022-03-19 02:37:11,397 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 405 transitions. Word has length 29 [2022-03-19 02:37:11,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:11,398 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 405 transitions. [2022-03-19 02:37:11,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:37:11,398 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 405 transitions. [2022-03-19 02:37:11,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 02:37:11,400 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:11,400 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:11,400 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-19 02:37:11,400 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:11,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:11,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1319777776, now seen corresponding path program 1 times [2022-03-19 02:37:11,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:11,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1296303887] [2022-03-19 02:37:11,401 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:37:11,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1319777776, now seen corresponding path program 2 times [2022-03-19 02:37:11,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:11,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657169381] [2022-03-19 02:37:11,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:11,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:11,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:11,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 02:37:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:11,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:37:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:11,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 02:37:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 02:37:11,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:11,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657169381] [2022-03-19 02:37:11,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657169381] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:11,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:11,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:37:11,469 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:11,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1296303887] [2022-03-19 02:37:11,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1296303887] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:11,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:11,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:37:11,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154615126] [2022-03-19 02:37:11,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:11,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 02:37:11,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:11,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 02:37:11,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-19 02:37:11,470 INFO L87 Difference]: Start difference. First operand 250 states and 405 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 02:37:11,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:11,801 INFO L93 Difference]: Finished difference Result 324 states and 521 transitions. [2022-03-19 02:37:11,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 02:37:11,802 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-19 02:37:11,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:11,805 INFO L225 Difference]: With dead ends: 324 [2022-03-19 02:37:11,805 INFO L226 Difference]: Without dead ends: 322 [2022-03-19 02:37:11,805 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 02:37:11,806 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 46 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:11,806 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 75 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:37:11,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-03-19 02:37:11,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 300. [2022-03-19 02:37:11,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 133 states have (on average 1.368421052631579) internal successors, (182), 149 states have internal predecessors, (182), 154 states have call successors, (154), 13 states have call predecessors, (154), 12 states have return successors, (153), 137 states have call predecessors, (153), 153 states have call successors, (153) [2022-03-19 02:37:11,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 489 transitions. [2022-03-19 02:37:11,891 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 489 transitions. Word has length 30 [2022-03-19 02:37:11,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:11,891 INFO L478 AbstractCegarLoop]: Abstraction has 300 states and 489 transitions. [2022-03-19 02:37:11,891 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 02:37:11,891 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 489 transitions. [2022-03-19 02:37:11,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 02:37:11,892 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:11,892 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:11,892 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-19 02:37:11,892 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:11,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:11,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1828949766, now seen corresponding path program 1 times [2022-03-19 02:37:11,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:11,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [595834329] [2022-03-19 02:37:11,893 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:37:11,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1828949766, now seen corresponding path program 2 times [2022-03-19 02:37:11,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:11,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484264167] [2022-03-19 02:37:11,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:11,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:11,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:11,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 02:37:11,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:11,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:37:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:11,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 02:37:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 02:37:11,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:11,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484264167] [2022-03-19 02:37:11,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484264167] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:11,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:11,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:37:11,964 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:11,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [595834329] [2022-03-19 02:37:11,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [595834329] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:11,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:11,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:37:11,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058872415] [2022-03-19 02:37:11,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:11,965 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 02:37:11,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:11,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 02:37:11,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-19 02:37:11,966 INFO L87 Difference]: Start difference. First operand 300 states and 489 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 02:37:12,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:12,423 INFO L93 Difference]: Finished difference Result 470 states and 788 transitions. [2022-03-19 02:37:12,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 02:37:12,423 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-03-19 02:37:12,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:12,427 INFO L225 Difference]: With dead ends: 470 [2022-03-19 02:37:12,427 INFO L226 Difference]: Without dead ends: 468 [2022-03-19 02:37:12,428 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-19 02:37:12,429 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 104 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:12,429 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 76 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 02:37:12,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-03-19 02:37:12,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 422. [2022-03-19 02:37:12,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 179 states have (on average 1.4022346368715084) internal successors, (251), 206 states have internal predecessors, (251), 229 states have call successors, (229), 14 states have call predecessors, (229), 13 states have return successors, (228), 201 states have call predecessors, (228), 228 states have call successors, (228) [2022-03-19 02:37:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 708 transitions. [2022-03-19 02:37:12,546 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 708 transitions. Word has length 32 [2022-03-19 02:37:12,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:12,546 INFO L478 AbstractCegarLoop]: Abstraction has 422 states and 708 transitions. [2022-03-19 02:37:12,546 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 02:37:12,546 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 708 transitions. [2022-03-19 02:37:12,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 02:37:12,547 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:12,547 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:12,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-19 02:37:12,547 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:12,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:12,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1969498376, now seen corresponding path program 1 times [2022-03-19 02:37:12,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:12,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [29203840] [2022-03-19 02:37:12,548 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:37:12,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1969498376, now seen corresponding path program 2 times [2022-03-19 02:37:12,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:12,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069958825] [2022-03-19 02:37:12,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:12,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:12,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:12,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 02:37:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:12,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:37:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:12,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 02:37:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 02:37:12,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:12,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069958825] [2022-03-19 02:37:12,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069958825] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:12,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:12,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:37:12,606 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:12,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [29203840] [2022-03-19 02:37:12,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [29203840] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:12,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:12,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:37:12,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318458153] [2022-03-19 02:37:12,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:12,607 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 02:37:12,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:12,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 02:37:12,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-19 02:37:12,607 INFO L87 Difference]: Start difference. First operand 422 states and 708 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 02:37:13,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:13,022 INFO L93 Difference]: Finished difference Result 489 states and 817 transitions. [2022-03-19 02:37:13,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 02:37:13,023 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-03-19 02:37:13,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:13,028 INFO L225 Difference]: With dead ends: 489 [2022-03-19 02:37:13,028 INFO L226 Difference]: Without dead ends: 487 [2022-03-19 02:37:13,028 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-19 02:37:13,029 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 109 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:13,029 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 66 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:37:13,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-03-19 02:37:13,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 429. [2022-03-19 02:37:13,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 182 states have (on average 1.3956043956043955) internal successors, (254), 209 states have internal predecessors, (254), 232 states have call successors, (232), 15 states have call predecessors, (232), 14 states have return successors, (231), 204 states have call predecessors, (231), 231 states have call successors, (231) [2022-03-19 02:37:13,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 717 transitions. [2022-03-19 02:37:13,134 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 717 transitions. Word has length 32 [2022-03-19 02:37:13,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:13,135 INFO L478 AbstractCegarLoop]: Abstraction has 429 states and 717 transitions. [2022-03-19 02:37:13,135 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 02:37:13,135 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 717 transitions. [2022-03-19 02:37:13,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 02:37:13,135 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:13,136 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:13,136 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-19 02:37:13,136 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:13,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:13,136 INFO L85 PathProgramCache]: Analyzing trace with hash 154781133, now seen corresponding path program 1 times [2022-03-19 02:37:13,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:13,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [21819943] [2022-03-19 02:37:13,137 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:37:13,137 INFO L85 PathProgramCache]: Analyzing trace with hash 154781133, now seen corresponding path program 2 times [2022-03-19 02:37:13,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:13,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666752852] [2022-03-19 02:37:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:13,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:13,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:13,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 02:37:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:13,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:37:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:13,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 02:37:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:13,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 02:37:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:13,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 02:37:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 02:37:13,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:13,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666752852] [2022-03-19 02:37:13,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666752852] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:13,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:13,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:37:13,239 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:13,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [21819943] [2022-03-19 02:37:13,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [21819943] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:13,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:13,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:37:13,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696058057] [2022-03-19 02:37:13,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:13,240 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 02:37:13,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:13,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 02:37:13,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-19 02:37:13,240 INFO L87 Difference]: Start difference. First operand 429 states and 717 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-19 02:37:13,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:13,632 INFO L93 Difference]: Finished difference Result 484 states and 791 transitions. [2022-03-19 02:37:13,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 02:37:13,632 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-03-19 02:37:13,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:13,636 INFO L225 Difference]: With dead ends: 484 [2022-03-19 02:37:13,636 INFO L226 Difference]: Without dead ends: 482 [2022-03-19 02:37:13,636 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-19 02:37:13,637 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:13,637 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 77 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:37:13,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-03-19 02:37:13,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 433. [2022-03-19 02:37:13,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 185 states have (on average 1.3891891891891892) internal successors, (257), 212 states have internal predecessors, (257), 232 states have call successors, (232), 16 states have call predecessors, (232), 15 states have return successors, (231), 204 states have call predecessors, (231), 231 states have call successors, (231) [2022-03-19 02:37:13,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 720 transitions. [2022-03-19 02:37:13,741 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 720 transitions. Word has length 42 [2022-03-19 02:37:13,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:13,741 INFO L478 AbstractCegarLoop]: Abstraction has 433 states and 720 transitions. [2022-03-19 02:37:13,742 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-19 02:37:13,742 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 720 transitions. [2022-03-19 02:37:13,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 02:37:13,743 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:13,744 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:13,744 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-19 02:37:13,744 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:13,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:13,744 INFO L85 PathProgramCache]: Analyzing trace with hash -756625364, now seen corresponding path program 1 times [2022-03-19 02:37:13,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:13,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [262820895] [2022-03-19 02:37:13,745 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:37:13,745 INFO L85 PathProgramCache]: Analyzing trace with hash -756625364, now seen corresponding path program 2 times [2022-03-19 02:37:13,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:13,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481609246] [2022-03-19 02:37:13,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:13,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:13,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:13,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 02:37:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:13,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:37:13,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:13,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 02:37:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:13,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 02:37:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 02:37:13,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:13,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481609246] [2022-03-19 02:37:13,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481609246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:13,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:13,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:37:13,801 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:13,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [262820895] [2022-03-19 02:37:13,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [262820895] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:13,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:13,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:37:13,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54794619] [2022-03-19 02:37:13,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:13,802 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 02:37:13,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:13,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 02:37:13,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-19 02:37:13,803 INFO L87 Difference]: Start difference. First operand 433 states and 720 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 02:37:14,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:14,094 INFO L93 Difference]: Finished difference Result 440 states and 726 transitions. [2022-03-19 02:37:14,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 02:37:14,094 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2022-03-19 02:37:14,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:14,098 INFO L225 Difference]: With dead ends: 440 [2022-03-19 02:37:14,098 INFO L226 Difference]: Without dead ends: 438 [2022-03-19 02:37:14,099 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-19 02:37:14,100 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:14,100 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 52 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:37:14,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-03-19 02:37:14,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 437. [2022-03-19 02:37:14,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 188 states have (on average 1.3829787234042554) internal successors, (260), 215 states have internal predecessors, (260), 232 states have call successors, (232), 17 states have call predecessors, (232), 16 states have return successors, (231), 204 states have call predecessors, (231), 231 states have call successors, (231) [2022-03-19 02:37:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 723 transitions. [2022-03-19 02:37:14,211 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 723 transitions. Word has length 42 [2022-03-19 02:37:14,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:14,211 INFO L478 AbstractCegarLoop]: Abstraction has 437 states and 723 transitions. [2022-03-19 02:37:14,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 02:37:14,212 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 723 transitions. [2022-03-19 02:37:14,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 02:37:14,213 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:14,213 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:14,213 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-19 02:37:14,213 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:14,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:14,213 INFO L85 PathProgramCache]: Analyzing trace with hash 202086614, now seen corresponding path program 1 times [2022-03-19 02:37:14,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:14,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1531641806] [2022-03-19 02:37:14,214 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:37:14,214 INFO L85 PathProgramCache]: Analyzing trace with hash 202086614, now seen corresponding path program 2 times [2022-03-19 02:37:14,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:14,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770602109] [2022-03-19 02:37:14,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:14,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:14,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:14,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:14,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 02:37:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:14,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:37:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:14,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 02:37:14,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:14,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 02:37:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:14,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 02:37:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:14,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 02:37:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 02:37:14,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:14,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770602109] [2022-03-19 02:37:14,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770602109] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:14,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:14,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:37:14,298 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:14,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1531641806] [2022-03-19 02:37:14,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1531641806] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:14,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:14,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:37:14,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125256905] [2022-03-19 02:37:14,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:14,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 02:37:14,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:14,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 02:37:14,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-19 02:37:14,300 INFO L87 Difference]: Start difference. First operand 437 states and 723 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 02:37:14,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:14,688 INFO L93 Difference]: Finished difference Result 501 states and 826 transitions. [2022-03-19 02:37:14,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 02:37:14,688 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 54 [2022-03-19 02:37:14,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:14,692 INFO L225 Difference]: With dead ends: 501 [2022-03-19 02:37:14,692 INFO L226 Difference]: Without dead ends: 499 [2022-03-19 02:37:14,692 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-03-19 02:37:14,693 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 80 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:14,693 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 66 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:37:14,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-03-19 02:37:14,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 441. [2022-03-19 02:37:14,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 191 states have (on average 1.3769633507853403) internal successors, (263), 218 states have internal predecessors, (263), 232 states have call successors, (232), 18 states have call predecessors, (232), 17 states have return successors, (231), 204 states have call predecessors, (231), 231 states have call successors, (231) [2022-03-19 02:37:14,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 726 transitions. [2022-03-19 02:37:14,816 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 726 transitions. Word has length 54 [2022-03-19 02:37:14,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:14,817 INFO L478 AbstractCegarLoop]: Abstraction has 441 states and 726 transitions. [2022-03-19 02:37:14,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 02:37:14,817 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 726 transitions. [2022-03-19 02:37:14,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-19 02:37:14,820 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:14,820 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:14,820 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-19 02:37:14,820 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:14,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:14,820 INFO L85 PathProgramCache]: Analyzing trace with hash -667500302, now seen corresponding path program 1 times [2022-03-19 02:37:14,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:14,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [174672001] [2022-03-19 02:37:14,857 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:37:14,857 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 02:37:14,857 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:37:14,857 INFO L85 PathProgramCache]: Analyzing trace with hash -667500302, now seen corresponding path program 2 times [2022-03-19 02:37:14,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:14,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064899105] [2022-03-19 02:37:14,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:14,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:14,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:14,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 02:37:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:14,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:37:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:14,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 02:37:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:14,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 02:37:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:14,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 02:37:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:14,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 02:37:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:14,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 02:37:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:14,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-03-19 02:37:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:14,951 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 02:37:14,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:14,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064899105] [2022-03-19 02:37:14,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064899105] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:37:14,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174777041] [2022-03-19 02:37:14,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:37:14,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:37:14,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:37:14,954 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 02:37:14,994 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 02:37:15,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:37:15,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:37:15,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 02:37:15,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:37:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-03-19 02:37:15,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 02:37:15,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174777041] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:15,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 02:37:15,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-03-19 02:37:15,357 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:15,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [174672001] [2022-03-19 02:37:15,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [174672001] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:15,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:15,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 02:37:15,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589357560] [2022-03-19 02:37:15,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:15,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 02:37:15,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:15,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 02:37:15,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-19 02:37:15,359 INFO L87 Difference]: Start difference. First operand 441 states and 726 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 02:37:15,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:15,591 INFO L93 Difference]: Finished difference Result 843 states and 1374 transitions. [2022-03-19 02:37:15,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 02:37:15,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2022-03-19 02:37:15,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:15,596 INFO L225 Difference]: With dead ends: 843 [2022-03-19 02:37:15,596 INFO L226 Difference]: Without dead ends: 437 [2022-03-19 02:37:15,598 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-19 02:37:15,598 INFO L912 BasicCegarLoop]: 71 mSDtfsCounter, 22 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:15,599 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 173 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:37:15,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-03-19 02:37:15,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 401. [2022-03-19 02:37:15,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 183 states have (on average 1.3387978142076502) internal successors, (245), 203 states have internal predecessors, (245), 200 states have call successors, (200), 18 states have call predecessors, (200), 17 states have return successors, (199), 179 states have call predecessors, (199), 199 states have call successors, (199) [2022-03-19 02:37:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 644 transitions. [2022-03-19 02:37:15,750 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 644 transitions. Word has length 62 [2022-03-19 02:37:15,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:15,751 INFO L478 AbstractCegarLoop]: Abstraction has 401 states and 644 transitions. [2022-03-19 02:37:15,751 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 02:37:15,751 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 644 transitions. [2022-03-19 02:37:15,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-19 02:37:15,752 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:15,752 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:15,786 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 02:37:15,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 02:37:15,968 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:15,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:15,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1858540084, now seen corresponding path program 1 times [2022-03-19 02:37:15,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:15,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1599617887] [2022-03-19 02:37:15,980 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:37:15,980 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 02:37:15,980 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:37:15,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1858540084, now seen corresponding path program 2 times [2022-03-19 02:37:15,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:15,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830564986] [2022-03-19 02:37:15,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:15,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:16,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:16,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 02:37:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:16,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:37:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:16,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 02:37:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:16,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 02:37:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:16,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 02:37:16,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:16,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 02:37:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:16,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-03-19 02:37:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:16,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-19 02:37:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:16,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-19 02:37:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:16,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 02:37:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:16,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-19 02:37:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:16,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-19 02:37:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 02:37:16,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:16,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830564986] [2022-03-19 02:37:16,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830564986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:37:16,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918898251] [2022-03-19 02:37:16,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:37:16,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:37:16,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:37:16,094 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 02:37:16,102 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 02:37:16,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:37:16,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:37:16,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:37:16,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:37:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-03-19 02:37:16,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 02:37:16,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918898251] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:16,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 02:37:16,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-03-19 02:37:16,629 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:16,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1599617887] [2022-03-19 02:37:16,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1599617887] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:16,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:16,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:37:16,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951787969] [2022-03-19 02:37:16,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:16,629 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 02:37:16,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:16,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 02:37:16,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-19 02:37:16,630 INFO L87 Difference]: Start difference. First operand 401 states and 644 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-19 02:37:17,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:17,059 INFO L93 Difference]: Finished difference Result 714 states and 1123 transitions. [2022-03-19 02:37:17,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 02:37:17,060 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 84 [2022-03-19 02:37:17,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:17,063 INFO L225 Difference]: With dead ends: 714 [2022-03-19 02:37:17,063 INFO L226 Difference]: Without dead ends: 329 [2022-03-19 02:37:17,065 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-03-19 02:37:17,065 INFO L912 BasicCegarLoop]: 89 mSDtfsCounter, 45 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:17,066 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 264 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:37:17,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-03-19 02:37:17,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 295. [2022-03-19 02:37:17,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 142 states have (on average 1.2887323943661972) internal successors, (183), 154 states have internal predecessors, (183), 136 states have call successors, (136), 17 states have call predecessors, (136), 16 states have return successors, (135), 123 states have call predecessors, (135), 135 states have call successors, (135) [2022-03-19 02:37:17,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 454 transitions. [2022-03-19 02:37:17,159 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 454 transitions. Word has length 84 [2022-03-19 02:37:17,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:17,160 INFO L478 AbstractCegarLoop]: Abstraction has 295 states and 454 transitions. [2022-03-19 02:37:17,160 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-19 02:37:17,160 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 454 transitions. [2022-03-19 02:37:17,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-19 02:37:17,161 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:17,161 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:17,190 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 02:37:17,389 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,SelfDestructingSolverStorable17 [2022-03-19 02:37:17,390 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:17,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:17,390 INFO L85 PathProgramCache]: Analyzing trace with hash -898087182, now seen corresponding path program 1 times [2022-03-19 02:37:17,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:17,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [991925676] [2022-03-19 02:37:17,398 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:37:17,398 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 02:37:17,398 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:37:17,398 INFO L85 PathProgramCache]: Analyzing trace with hash -898087182, now seen corresponding path program 2 times [2022-03-19 02:37:17,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:17,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842329348] [2022-03-19 02:37:17,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:17,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:17,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:17,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 02:37:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:17,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:37:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:17,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 02:37:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:17,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 02:37:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:17,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 02:37:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:17,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 02:37:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:17,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-03-19 02:37:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:17,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-19 02:37:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:17,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-19 02:37:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:17,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 02:37:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:17,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-19 02:37:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:17,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-19 02:37:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 02:37:17,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:17,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842329348] [2022-03-19 02:37:17,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842329348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:37:17,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145686117] [2022-03-19 02:37:17,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:37:17,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:37:17,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:37:17,487 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 02:37:17,512 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 02:37:17,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:37:17,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:37:17,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 02:37:17,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:37:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-03-19 02:37:17,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 02:37:17,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145686117] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:17,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 02:37:17,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-03-19 02:37:17,974 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:17,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [991925676] [2022-03-19 02:37:17,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [991925676] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:17,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:17,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:37:17,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268321639] [2022-03-19 02:37:17,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:17,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 02:37:17,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:17,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 02:37:17,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-19 02:37:17,976 INFO L87 Difference]: Start difference. First operand 295 states and 454 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-19 02:37:18,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:18,223 INFO L93 Difference]: Finished difference Result 549 states and 838 transitions. [2022-03-19 02:37:18,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 02:37:18,224 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 84 [2022-03-19 02:37:18,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:18,226 INFO L225 Difference]: With dead ends: 549 [2022-03-19 02:37:18,226 INFO L226 Difference]: Without dead ends: 249 [2022-03-19 02:37:18,229 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-19 02:37:18,229 INFO L912 BasicCegarLoop]: 67 mSDtfsCounter, 20 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:18,230 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 218 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:37:18,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-19 02:37:18,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 238. [2022-03-19 02:37:18,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 117 states have (on average 1.2564102564102564) internal successors, (147), 127 states have internal predecessors, (147), 104 states have call successors, (104), 17 states have call predecessors, (104), 16 states have return successors, (103), 93 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-19 02:37:18,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 354 transitions. [2022-03-19 02:37:18,295 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 354 transitions. Word has length 84 [2022-03-19 02:37:18,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:18,295 INFO L478 AbstractCegarLoop]: Abstraction has 238 states and 354 transitions. [2022-03-19 02:37:18,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-19 02:37:18,296 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 354 transitions. [2022-03-19 02:37:18,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-19 02:37:18,300 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:18,300 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:18,329 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 02:37:18,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:37:18,519 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:18,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:18,519 INFO L85 PathProgramCache]: Analyzing trace with hash -560912485, now seen corresponding path program 1 times [2022-03-19 02:37:18,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:18,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [357702077] [2022-03-19 02:37:18,520 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:37:18,520 INFO L85 PathProgramCache]: Analyzing trace with hash -560912485, now seen corresponding path program 2 times [2022-03-19 02:37:18,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:18,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635798342] [2022-03-19 02:37:18,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:18,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:18,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:18,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 02:37:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:18,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:37:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:18,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 02:37:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:18,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 02:37:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:18,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 02:37:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:18,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 02:37:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:18,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 02:37:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:18,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-19 02:37:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:18,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 02:37:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:18,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-19 02:37:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:18,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-19 02:37:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:18,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-19 02:37:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:18,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-19 02:37:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:18,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-19 02:37:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:18,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-19 02:37:18,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:18,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-19 02:37:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 02:37:18,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:18,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635798342] [2022-03-19 02:37:18,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635798342] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:37:18,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431911986] [2022-03-19 02:37:18,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:37:18,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:37:18,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:37:18,645 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 02:37:18,653 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 02:37:18,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:37:18,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:37:18,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 02:37:18,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:37:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 153 proven. 7 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2022-03-19 02:37:19,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:37:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 02:37:19,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431911986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:37:19,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:37:19,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2022-03-19 02:37:19,534 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:19,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [357702077] [2022-03-19 02:37:19,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [357702077] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:19,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:19,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 02:37:19,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848649224] [2022-03-19 02:37:19,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:19,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 02:37:19,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:19,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 02:37:19,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-03-19 02:37:19,536 INFO L87 Difference]: Start difference. First operand 238 states and 354 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 5 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-19 02:37:20,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:20,167 INFO L93 Difference]: Finished difference Result 350 states and 539 transitions. [2022-03-19 02:37:20,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 02:37:20,168 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 5 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 111 [2022-03-19 02:37:20,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:20,170 INFO L225 Difference]: With dead ends: 350 [2022-03-19 02:37:20,170 INFO L226 Difference]: Without dead ends: 348 [2022-03-19 02:37:20,171 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 02:37:20,172 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 74 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:20,172 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 98 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 02:37:20,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-03-19 02:37:20,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 294. [2022-03-19 02:37:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 142 states have (on average 1.295774647887324) internal successors, (184), 156 states have internal predecessors, (184), 134 states have call successors, (134), 18 states have call predecessors, (134), 17 states have return successors, (133), 119 states have call predecessors, (133), 133 states have call successors, (133) [2022-03-19 02:37:20,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 451 transitions. [2022-03-19 02:37:20,256 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 451 transitions. Word has length 111 [2022-03-19 02:37:20,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:20,256 INFO L478 AbstractCegarLoop]: Abstraction has 294 states and 451 transitions. [2022-03-19 02:37:20,256 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 5 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-19 02:37:20,256 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 451 transitions. [2022-03-19 02:37:20,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-19 02:37:20,258 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:20,258 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:20,287 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 02:37:20,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:37:20,471 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:20,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:20,472 INFO L85 PathProgramCache]: Analyzing trace with hash 977427545, now seen corresponding path program 1 times [2022-03-19 02:37:20,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:20,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1750240248] [2022-03-19 02:37:20,472 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:37:20,473 INFO L85 PathProgramCache]: Analyzing trace with hash 977427545, now seen corresponding path program 2 times [2022-03-19 02:37:20,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:20,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779460192] [2022-03-19 02:37:20,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:20,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:20,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:20,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 02:37:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:20,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:37:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:20,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 02:37:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:20,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 02:37:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:20,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 02:37:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:20,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 02:37:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:20,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 02:37:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:20,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-19 02:37:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:20,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 02:37:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:20,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-19 02:37:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:20,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-19 02:37:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:20,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-19 02:37:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:20,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-19 02:37:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:20,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-19 02:37:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:20,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-19 02:37:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:20,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-19 02:37:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 02:37:20,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:20,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779460192] [2022-03-19 02:37:20,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779460192] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:37:20,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379663190] [2022-03-19 02:37:20,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:37:20,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:37:20,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:37:20,592 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 02:37:20,611 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 02:37:20,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:37:20,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:37:20,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 02:37:20,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:37:20,986 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 33 proven. 19 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 02:37:20,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:37:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 33 proven. 19 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 02:37:21,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379663190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:37:21,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:37:21,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-03-19 02:37:21,400 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:21,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1750240248] [2022-03-19 02:37:21,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1750240248] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:21,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:21,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 02:37:21,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510950021] [2022-03-19 02:37:21,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:21,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 02:37:21,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:21,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 02:37:21,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-03-19 02:37:21,401 INFO L87 Difference]: Start difference. First operand 294 states and 451 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-19 02:37:21,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:21,854 INFO L93 Difference]: Finished difference Result 323 states and 492 transitions. [2022-03-19 02:37:21,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 02:37:21,855 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 111 [2022-03-19 02:37:21,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:21,858 INFO L225 Difference]: With dead ends: 323 [2022-03-19 02:37:21,858 INFO L226 Difference]: Without dead ends: 321 [2022-03-19 02:37:21,859 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-03-19 02:37:21,859 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 56 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:21,859 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 82 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 02:37:21,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-03-19 02:37:21,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 242. [2022-03-19 02:37:21,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 120 states have (on average 1.25) internal successors, (150), 130 states have internal predecessors, (150), 104 states have call successors, (104), 18 states have call predecessors, (104), 17 states have return successors, (103), 93 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-19 02:37:21,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 357 transitions. [2022-03-19 02:37:21,920 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 357 transitions. Word has length 111 [2022-03-19 02:37:21,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:21,921 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 357 transitions. [2022-03-19 02:37:21,921 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-19 02:37:21,921 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 357 transitions. [2022-03-19 02:37:21,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-19 02:37:21,922 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:21,922 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:21,965 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 02:37:22,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:37:22,135 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:22,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:22,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1099325000, now seen corresponding path program 3 times [2022-03-19 02:37:22,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:22,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1846808874] [2022-03-19 02:37:22,136 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:37:22,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1099325000, now seen corresponding path program 4 times [2022-03-19 02:37:22,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:22,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122247678] [2022-03-19 02:37:22,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:22,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:22,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:22,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:22,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 02:37:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:22,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:37:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:22,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 02:37:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:22,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 02:37:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:22,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 02:37:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:22,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 02:37:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:22,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 02:37:22,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:22,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-19 02:37:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:22,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 02:37:22,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:22,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-19 02:37:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:22,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-19 02:37:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:22,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-19 02:37:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:22,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-19 02:37:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:22,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-19 02:37:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:22,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-19 02:37:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:22,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-19 02:37:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:22,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-03-19 02:37:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 47 proven. 8 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-19 02:37:22,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:22,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122247678] [2022-03-19 02:37:22,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122247678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:37:22,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483387841] [2022-03-19 02:37:22,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:37:22,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:37:22,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:37:22,279 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 02:37:22,287 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 02:37:22,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:37:22,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:37:22,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 02:37:22,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:37:22,755 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 210 proven. 7 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-03-19 02:37:22,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:37:23,055 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 47 proven. 8 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-19 02:37:23,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483387841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:37:23,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:37:23,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-03-19 02:37:23,056 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:23,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1846808874] [2022-03-19 02:37:23,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1846808874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:23,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:23,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 02:37:23,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122762968] [2022-03-19 02:37:23,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:23,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 02:37:23,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:23,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 02:37:23,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-03-19 02:37:23,057 INFO L87 Difference]: Start difference. First operand 242 states and 357 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-19 02:37:24,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:24,534 INFO L93 Difference]: Finished difference Result 756 states and 1173 transitions. [2022-03-19 02:37:24,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 02:37:24,535 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 116 [2022-03-19 02:37:24,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:24,538 INFO L225 Difference]: With dead ends: 756 [2022-03-19 02:37:24,539 INFO L226 Difference]: Without dead ends: 452 [2022-03-19 02:37:24,541 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=357, Invalid=1449, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 02:37:24,543 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 215 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 573 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 573 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:24,544 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 110 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [573 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 02:37:24,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-03-19 02:37:24,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 364. [2022-03-19 02:37:24,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 169 states have (on average 1.2781065088757397) internal successors, (216), 183 states have internal predecessors, (216), 177 states have call successors, (177), 18 states have call predecessors, (177), 17 states have return successors, (176), 162 states have call predecessors, (176), 176 states have call successors, (176) [2022-03-19 02:37:24,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 569 transitions. [2022-03-19 02:37:24,650 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 569 transitions. Word has length 116 [2022-03-19 02:37:24,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:24,652 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 569 transitions. [2022-03-19 02:37:24,652 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-19 02:37:24,652 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 569 transitions. [2022-03-19 02:37:24,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-19 02:37:24,654 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:24,654 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:24,681 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 02:37:24,872 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:37:24,872 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:24,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:24,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1934725046, now seen corresponding path program 3 times [2022-03-19 02:37:24,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:24,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1968837112] [2022-03-19 02:37:24,873 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:37:24,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1934725046, now seen corresponding path program 4 times [2022-03-19 02:37:24,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:24,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808015720] [2022-03-19 02:37:24,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:24,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:24,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:24,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 02:37:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:24,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:37:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:24,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 02:37:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:24,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 02:37:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:24,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 02:37:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:24,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 02:37:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:24,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 02:37:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:24,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-19 02:37:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:24,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 02:37:24,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:24,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-19 02:37:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:24,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-19 02:37:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:25,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-19 02:37:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:25,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-19 02:37:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:25,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-19 02:37:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:25,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-19 02:37:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:25,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-19 02:37:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:25,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-03-19 02:37:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:25,017 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-19 02:37:25,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:25,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808015720] [2022-03-19 02:37:25,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808015720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:37:25,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456939187] [2022-03-19 02:37:25,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:37:25,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:37:25,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:37:25,019 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 02:37:25,020 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 02:37:25,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:37:25,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:37:25,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 02:37:25,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:37:25,440 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 37 proven. 66 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-03-19 02:37:25,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:37:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 37 proven. 66 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-03-19 02:37:25,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456939187] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:37:25,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:37:25,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-19 02:37:25,742 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:25,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1968837112] [2022-03-19 02:37:25,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1968837112] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:25,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:25,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 02:37:25,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595860892] [2022-03-19 02:37:25,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:25,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 02:37:25,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:25,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 02:37:25,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-03-19 02:37:25,744 INFO L87 Difference]: Start difference. First operand 364 states and 569 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-03-19 02:37:26,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:26,773 INFO L93 Difference]: Finished difference Result 620 states and 983 transitions. [2022-03-19 02:37:26,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 02:37:26,773 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 116 [2022-03-19 02:37:26,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:26,777 INFO L225 Difference]: With dead ends: 620 [2022-03-19 02:37:26,777 INFO L226 Difference]: Without dead ends: 618 [2022-03-19 02:37:26,778 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 256 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 02:37:26,778 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 187 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:26,779 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 89 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 02:37:26,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-03-19 02:37:26,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 501. [2022-03-19 02:37:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 228 states have (on average 1.3114035087719298) internal successors, (299), 250 states have internal predecessors, (299), 250 states have call successors, (250), 23 states have call predecessors, (250), 22 states have return successors, (249), 227 states have call predecessors, (249), 249 states have call successors, (249) [2022-03-19 02:37:26,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 798 transitions. [2022-03-19 02:37:26,909 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 798 transitions. Word has length 116 [2022-03-19 02:37:26,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:26,910 INFO L478 AbstractCegarLoop]: Abstraction has 501 states and 798 transitions. [2022-03-19 02:37:26,910 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-03-19 02:37:26,910 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 798 transitions. [2022-03-19 02:37:26,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-19 02:37:26,912 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:26,912 INFO L500 BasicCegarLoop]: trace histogram [22, 21, 21, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:26,935 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 02:37:27,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:37:27,128 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:27,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:27,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1563563510, now seen corresponding path program 5 times [2022-03-19 02:37:27,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:27,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1600838586] [2022-03-19 02:37:27,129 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:37:27,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1563563510, now seen corresponding path program 6 times [2022-03-19 02:37:27,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:27,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420444731] [2022-03-19 02:37:27,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:27,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 02:37:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:37:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 02:37:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 02:37:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 02:37:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 02:37:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 02:37:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-03-19 02:37:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 02:37:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-19 02:37:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-19 02:37:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-03-19 02:37:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-19 02:37:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-19 02:37:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-19 02:37:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-03-19 02:37:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-03-19 02:37:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-19 02:37:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-03-19 02:37:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-03-19 02:37:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-03-19 02:37:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-19 02:37:27,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:27,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420444731] [2022-03-19 02:37:27,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420444731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:37:27,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712486905] [2022-03-19 02:37:27,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:37:27,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:37:27,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:37:27,293 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 02:37:27,317 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 02:37:27,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 02:37:27,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:37:27,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 02:37:27,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:37:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 56 proven. 12 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-19 02:37:27,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:37:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 54 proven. 14 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-19 02:37:28,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712486905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:37:28,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:37:28,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-03-19 02:37:28,072 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:28,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1600838586] [2022-03-19 02:37:28,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1600838586] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:28,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:28,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 02:37:28,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964355054] [2022-03-19 02:37:28,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:28,073 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 02:37:28,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:28,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 02:37:28,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-19 02:37:28,074 INFO L87 Difference]: Start difference. First operand 501 states and 798 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-03-19 02:37:29,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:29,198 INFO L93 Difference]: Finished difference Result 770 states and 1246 transitions. [2022-03-19 02:37:29,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 02:37:29,199 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 138 [2022-03-19 02:37:29,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:29,202 INFO L225 Difference]: With dead ends: 770 [2022-03-19 02:37:29,202 INFO L226 Difference]: Without dead ends: 309 [2022-03-19 02:37:29,204 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 311 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 02:37:29,204 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 132 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:29,204 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 105 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 02:37:29,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-03-19 02:37:29,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 213. [2022-03-19 02:37:29,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 118 states have (on average 1.1610169491525424) internal successors, (137), 124 states have internal predecessors, (137), 72 states have call successors, (72), 23 states have call predecessors, (72), 22 states have return successors, (71), 65 states have call predecessors, (71), 71 states have call successors, (71) [2022-03-19 02:37:29,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 280 transitions. [2022-03-19 02:37:29,274 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 280 transitions. Word has length 138 [2022-03-19 02:37:29,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:29,274 INFO L478 AbstractCegarLoop]: Abstraction has 213 states and 280 transitions. [2022-03-19 02:37:29,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-03-19 02:37:29,274 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 280 transitions. [2022-03-19 02:37:29,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-19 02:37:29,276 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:29,276 INFO L500 BasicCegarLoop]: trace histogram [28, 27, 27, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:29,301 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 02:37:29,491 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,SelfDestructingSolverStorable23 [2022-03-19 02:37:29,491 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:29,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:29,492 INFO L85 PathProgramCache]: Analyzing trace with hash -915763573, now seen corresponding path program 1 times [2022-03-19 02:37:29,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:29,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1224392196] [2022-03-19 02:37:29,492 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:37:29,493 INFO L85 PathProgramCache]: Analyzing trace with hash -915763573, now seen corresponding path program 2 times [2022-03-19 02:37:29,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:29,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561998132] [2022-03-19 02:37:29,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:29,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 02:37:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:37:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 02:37:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 02:37:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 02:37:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 02:37:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 02:37:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-19 02:37:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 02:37:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-19 02:37:29,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-19 02:37:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-19 02:37:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-19 02:37:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-19 02:37:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-19 02:37:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-19 02:37:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-03-19 02:37:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-03-19 02:37:29,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-03-19 02:37:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-03-19 02:37:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-03-19 02:37:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-03-19 02:37:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-03-19 02:37:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-03-19 02:37:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-03-19 02:37:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-03-19 02:37:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-03-19 02:37:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 74 proven. 32 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-03-19 02:37:29,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:29,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561998132] [2022-03-19 02:37:29,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561998132] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:37:29,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330882848] [2022-03-19 02:37:29,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:37:29,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:37:29,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:37:29,661 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 02:37:29,662 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 02:37:29,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:37:29,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:37:29,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:37:29,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:37:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 794 proven. 8 refuted. 0 times theorem prover too weak. 708 trivial. 0 not checked. [2022-03-19 02:37:30,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:37:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2022-03-19 02:37:30,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330882848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:37:30,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:37:30,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2022-03-19 02:37:30,570 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:30,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1224392196] [2022-03-19 02:37:30,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1224392196] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:30,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:30,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 02:37:30,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961652103] [2022-03-19 02:37:30,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:30,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 02:37:30,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:30,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 02:37:30,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-19 02:37:30,572 INFO L87 Difference]: Start difference. First operand 213 states and 280 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 7 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2022-03-19 02:37:31,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:31,408 INFO L93 Difference]: Finished difference Result 399 states and 535 transitions. [2022-03-19 02:37:31,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 02:37:31,409 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 7 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 173 [2022-03-19 02:37:31,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:31,411 INFO L225 Difference]: With dead ends: 399 [2022-03-19 02:37:31,411 INFO L226 Difference]: Without dead ends: 246 [2022-03-19 02:37:31,412 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 02:37:31,413 INFO L912 BasicCegarLoop]: 67 mSDtfsCounter, 88 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:31,414 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 104 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 02:37:31,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-03-19 02:37:31,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 211. [2022-03-19 02:37:31,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 118 states have (on average 1.1610169491525424) internal successors, (137), 124 states have internal predecessors, (137), 70 states have call successors, (70), 23 states have call predecessors, (70), 22 states have return successors, (69), 63 states have call predecessors, (69), 69 states have call successors, (69) [2022-03-19 02:37:31,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2022-03-19 02:37:31,475 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 173 [2022-03-19 02:37:31,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:31,475 INFO L478 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2022-03-19 02:37:31,475 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 7 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2022-03-19 02:37:31,475 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2022-03-19 02:37:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-19 02:37:31,477 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:37:31,477 INFO L500 BasicCegarLoop]: trace histogram [28, 27, 27, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:37:31,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 02:37:31,700 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-19 02:37:31,701 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:37:31,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:37:31,701 INFO L85 PathProgramCache]: Analyzing trace with hash 345153677, now seen corresponding path program 5 times [2022-03-19 02:37:31,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:31,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [870457042] [2022-03-19 02:37:31,702 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:37:31,702 INFO L85 PathProgramCache]: Analyzing trace with hash 345153677, now seen corresponding path program 6 times [2022-03-19 02:37:31,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:37:31,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148009516] [2022-03-19 02:37:31,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:37:31,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:37:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:37:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 02:37:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:37:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 02:37:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 02:37:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 02:37:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 02:37:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 02:37:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-19 02:37:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 02:37:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-19 02:37:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-19 02:37:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-19 02:37:31,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-19 02:37:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-19 02:37:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-19 02:37:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-19 02:37:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-03-19 02:37:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-03-19 02:37:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-03-19 02:37:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-03-19 02:37:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-03-19 02:37:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-03-19 02:37:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-03-19 02:37:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-03-19 02:37:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-03-19 02:37:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-03-19 02:37:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-03-19 02:37:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:37:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2022-03-19 02:37:31,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:37:31,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148009516] [2022-03-19 02:37:31,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148009516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:37:31,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955939943] [2022-03-19 02:37:31,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:37:31,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:37:31,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:37:31,861 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 02:37:31,892 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 02:37:31,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 02:37:31,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:37:31,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 02:37:31,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:37:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 69 proven. 19 refuted. 0 times theorem prover too weak. 1422 trivial. 0 not checked. [2022-03-19 02:37:32,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:37:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 66 proven. 22 refuted. 0 times theorem prover too weak. 1422 trivial. 0 not checked. [2022-03-19 02:37:32,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955939943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:37:32,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:37:32,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-19 02:37:32,759 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:37:32,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [870457042] [2022-03-19 02:37:32,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [870457042] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:37:32,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:37:32,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 02:37:32,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663098616] [2022-03-19 02:37:32,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:37:32,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 02:37:32,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:37:32,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 02:37:32,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-03-19 02:37:32,762 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2022-03-19 02:37:33,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:37:33,274 INFO L93 Difference]: Finished difference Result 318 states and 407 transitions. [2022-03-19 02:37:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 02:37:33,274 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) Word has length 173 [2022-03-19 02:37:33,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:37:33,275 INFO L225 Difference]: With dead ends: 318 [2022-03-19 02:37:33,275 INFO L226 Difference]: Without dead ends: 0 [2022-03-19 02:37:33,276 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 392 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2022-03-19 02:37:33,277 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 86 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:37:33,277 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 60 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 02:37:33,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-19 02:37:33,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-19 02:37:33,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-19 02:37:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-19 02:37:33,278 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 173 [2022-03-19 02:37:33,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:37:33,278 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-19 02:37:33,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2022-03-19 02:37:33,278 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-19 02:37:33,278 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-19 02:37:33,284 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 02:37:33,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-19 02:37:33,500 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,SelfDestructingSolverStorable25 [2022-03-19 02:37:33,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-19 02:38:47,374 WARN L232 SmtUtils]: Spent 1.23m on a formula simplification. DAG size of input: 395 DAG size of output: 395 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)