/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-invgen/down.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 07:47:35,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 07:47:35,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 07:47:35,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 07:47:35,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 07:47:35,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 07:47:35,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 07:47:35,942 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 07:47:35,950 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 07:47:35,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 07:47:35,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 07:47:35,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 07:47:35,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 07:47:35,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 07:47:35,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 07:47:35,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 07:47:35,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 07:47:35,953 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 07:47:35,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 07:47:35,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 07:47:35,953 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 07:47:35,953 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 07:47:35,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 07:47:35,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 07:47:35,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 07:47:35,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 07:47:35,954 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 07:47:35,954 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 07:47:35,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 07:47:35,954 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 07:47:35,954 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 07:47:36,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 07:47:36,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 07:47:36,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 07:47:36,170 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 07:47:36,171 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 07:47:36,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/down.i [2022-03-19 07:47:36,218 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d53902911/80fc9c5fd03a4b7ba39a9faa35494ff4/FLAGaf439e558 [2022-03-19 07:47:36,524 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 07:47:36,525 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/down.i [2022-03-19 07:47:36,529 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d53902911/80fc9c5fd03a4b7ba39a9faa35494ff4/FLAGaf439e558 [2022-03-19 07:47:36,954 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d53902911/80fc9c5fd03a4b7ba39a9faa35494ff4 [2022-03-19 07:47:36,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 07:47:36,957 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 07:47:36,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 07:47:36,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 07:47:36,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 07:47:36,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 07:47:36" (1/1) ... [2022-03-19 07:47:36,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76254fe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:47:36, skipping insertion in model container [2022-03-19 07:47:36,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 07:47:36" (1/1) ... [2022-03-19 07:47:36,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 07:47:36,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 07:47:37,118 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/down.i[893,906] [2022-03-19 07:47:37,125 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 07:47:37,130 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 07:47:37,138 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/down.i[893,906] [2022-03-19 07:47:37,141 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 07:47:37,151 INFO L208 MainTranslator]: Completed translation [2022-03-19 07:47:37,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:47:37 WrapperNode [2022-03-19 07:47:37,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 07:47:37,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 07:47:37,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 07:47:37,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 07:47:37,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:47:37" (1/1) ... [2022-03-19 07:47:37,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:47:37" (1/1) ... [2022-03-19 07:47:37,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:47:37" (1/1) ... [2022-03-19 07:47:37,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:47:37" (1/1) ... [2022-03-19 07:47:37,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:47:37" (1/1) ... [2022-03-19 07:47:37,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:47:37" (1/1) ... [2022-03-19 07:47:37,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:47:37" (1/1) ... [2022-03-19 07:47:37,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 07:47:37,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 07:47:37,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 07:47:37,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 07:47:37,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:47:37" (1/1) ... [2022-03-19 07:47:37,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 07:47:37,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:47:37,205 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 07:47:37,212 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 07:47:37,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 07:47:37,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 07:47:37,232 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 07:47:37,232 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 07:47:37,232 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 07:47:37,232 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 07:47:37,232 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 07:47:37,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 07:47:37,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-19 07:47:37,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-19 07:47:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 07:47:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 07:47:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 07:47:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 07:47:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 07:47:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 07:47:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 07:47:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 07:47:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 07:47:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 07:47:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 07:47:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 07:47:37,278 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 07:47:37,279 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 07:47:37,421 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 07:47:37,425 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 07:47:37,425 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 07:47:37,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 07:47:37 BoogieIcfgContainer [2022-03-19 07:47:37,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 07:47:37,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 07:47:37,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 07:47:37,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 07:47:37,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 07:47:36" (1/3) ... [2022-03-19 07:47:37,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60aa6490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 07:47:37, skipping insertion in model container [2022-03-19 07:47:37,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:47:37" (2/3) ... [2022-03-19 07:47:37,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60aa6490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 07:47:37, skipping insertion in model container [2022-03-19 07:47:37,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 07:47:37" (3/3) ... [2022-03-19 07:47:37,437 INFO L111 eAbstractionObserver]: Analyzing ICFG down.i [2022-03-19 07:47:37,440 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 07:47:37,440 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 07:47:37,498 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 07:47:37,529 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 07:47:37,529 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 07:47:37,552 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 07:47:37,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-19 07:47:37,557 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:37,557 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:37,558 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:37,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:37,561 INFO L85 PathProgramCache]: Analyzing trace with hash 991123303, now seen corresponding path program 1 times [2022-03-19 07:47:37,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:37,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [817900741] [2022-03-19 07:47:37,582 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:47:37,583 INFO L85 PathProgramCache]: Analyzing trace with hash 991123303, now seen corresponding path program 2 times [2022-03-19 07:47:37,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:37,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137023408] [2022-03-19 07:47:37,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:37,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:37,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:37,769 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 07:47:37,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:37,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137023408] [2022-03-19 07:47:37,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137023408] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:37,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:37,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 07:47:37,772 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:37,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [817900741] [2022-03-19 07:47:37,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [817900741] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:37,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:37,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 07:47:37,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917601230] [2022-03-19 07:47:37,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:37,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 07:47:37,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:37,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 07:47:37,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 07:47:37,801 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 07:47:37,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:37,928 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-03-19 07:47:37,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 07:47:37,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 13 [2022-03-19 07:47:37,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:37,944 INFO L225 Difference]: With dead ends: 43 [2022-03-19 07:47:37,944 INFO L226 Difference]: Without dead ends: 18 [2022-03-19 07:47:37,946 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-03-19 07:47:37,949 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:37,950 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 39 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:47:37,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-19 07:47:37,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-19 07:47:37,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:37,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-03-19 07:47:37,978 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2022-03-19 07:47:37,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:37,979 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-03-19 07:47:37,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 07:47:37,979 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-03-19 07:47:37,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-19 07:47:37,980 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:37,980 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:37,980 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 07:47:37,981 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:37,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:37,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1458852147, now seen corresponding path program 1 times [2022-03-19 07:47:37,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:37,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [333803636] [2022-03-19 07:47:38,231 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:38,233 INFO L85 PathProgramCache]: Analyzing trace with hash -801648754, now seen corresponding path program 1 times [2022-03-19 07:47:38,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:38,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416528190] [2022-03-19 07:47:38,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:38,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:38,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:38,312 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 07:47:38,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:38,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416528190] [2022-03-19 07:47:38,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416528190] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:38,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:38,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:38,355 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:38,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [333803636] [2022-03-19 07:47:38,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [333803636] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:38,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:38,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:38,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673613750] [2022-03-19 07:47:38,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:38,356 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 07:47:38,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:38,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 07:47:38,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-03-19 07:47:38,357 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:47:38,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:38,412 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-03-19 07:47:38,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 07:47:38,412 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-19 07:47:38,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:38,414 INFO L225 Difference]: With dead ends: 29 [2022-03-19 07:47:38,414 INFO L226 Difference]: Without dead ends: 19 [2022-03-19 07:47:38,416 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-19 07:47:38,418 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:38,421 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 37 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:47:38,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-19 07:47:38,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-19 07:47:38,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:38,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-03-19 07:47:38,425 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2022-03-19 07:47:38,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:38,425 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-03-19 07:47:38,425 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:47:38,425 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-03-19 07:47:38,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 07:47:38,425 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:38,426 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:38,426 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 07:47:38,426 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:38,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:38,427 INFO L85 PathProgramCache]: Analyzing trace with hash -98679769, now seen corresponding path program 2 times [2022-03-19 07:47:38,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:38,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [465877202] [2022-03-19 07:47:38,539 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:38,540 INFO L85 PathProgramCache]: Analyzing trace with hash 164011982, now seen corresponding path program 1 times [2022-03-19 07:47:38,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:38,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637538471] [2022-03-19 07:47:38,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:38,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:38,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:38,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:38,607 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 07:47:38,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:38,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637538471] [2022-03-19 07:47:38,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637538471] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:38,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:38,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:38,644 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:38,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [465877202] [2022-03-19 07:47:38,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [465877202] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:38,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:38,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 07:47:38,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578490767] [2022-03-19 07:47:38,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:38,645 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 07:47:38,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:38,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 07:47:38,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-19 07:47:38,647 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 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 07:47:38,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:38,740 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-03-19 07:47:38,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 07:47:38,741 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 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 07:47:38,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:38,742 INFO L225 Difference]: With dead ends: 30 [2022-03-19 07:47:38,742 INFO L226 Difference]: Without dead ends: 20 [2022-03-19 07:47:38,742 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-19 07:47:38,743 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:38,743 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 42 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:47:38,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-19 07:47:38,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-19 07:47:38,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:38,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-03-19 07:47:38,746 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2022-03-19 07:47:38,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:38,747 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-03-19 07:47:38,747 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 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 07:47:38,747 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-03-19 07:47:38,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-19 07:47:38,747 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:38,747 INFO L500 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:38,748 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 07:47:38,748 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:38,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:38,748 INFO L85 PathProgramCache]: Analyzing trace with hash -883009011, now seen corresponding path program 3 times [2022-03-19 07:47:38,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:38,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [856053489] [2022-03-19 07:47:38,865 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:38,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1129672718, now seen corresponding path program 1 times [2022-03-19 07:47:38,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:38,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243068862] [2022-03-19 07:47:38,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:38,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:38,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:38,913 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 07:47:38,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:38,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243068862] [2022-03-19 07:47:38,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243068862] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:38,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:38,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:38,958 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:38,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [856053489] [2022-03-19 07:47:38,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [856053489] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:38,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:38,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 07:47:38,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494242700] [2022-03-19 07:47:38,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:38,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 07:47:38,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:38,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 07:47:38,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-19 07:47:38,960 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 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 07:47:39,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:39,051 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-03-19 07:47:39,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 07:47:39,052 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 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 16 [2022-03-19 07:47:39,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:39,052 INFO L225 Difference]: With dead ends: 31 [2022-03-19 07:47:39,053 INFO L226 Difference]: Without dead ends: 21 [2022-03-19 07:47:39,053 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-19 07:47:39,053 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:39,054 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 47 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:47:39,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-19 07:47:39,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-03-19 07:47:39,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:39,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-03-19 07:47:39,057 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2022-03-19 07:47:39,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:39,058 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-03-19 07:47:39,058 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 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 07:47:39,058 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-03-19 07:47:39,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 07:47:39,058 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:39,058 INFO L500 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:39,058 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 07:47:39,058 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:39,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:39,059 INFO L85 PathProgramCache]: Analyzing trace with hash 572588263, now seen corresponding path program 4 times [2022-03-19 07:47:39,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:39,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1041720853] [2022-03-19 07:47:39,270 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:39,271 INFO L85 PathProgramCache]: Analyzing trace with hash 2095333454, now seen corresponding path program 1 times [2022-03-19 07:47:39,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:39,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234439618] [2022-03-19 07:47:39,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:39,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:39,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:39,309 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 07:47:39,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:39,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234439618] [2022-03-19 07:47:39,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234439618] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:39,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:39,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:39,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:39,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1041720853] [2022-03-19 07:47:39,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1041720853] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:39,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:39,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 07:47:39,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843041580] [2022-03-19 07:47:39,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:39,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 07:47:39,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:39,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 07:47:39,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-19 07:47:39,361 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:47:39,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:39,458 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-03-19 07:47:39,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 07:47:39,458 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-19 07:47:39,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:39,459 INFO L225 Difference]: With dead ends: 32 [2022-03-19 07:47:39,459 INFO L226 Difference]: Without dead ends: 22 [2022-03-19 07:47:39,459 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-19 07:47:39,460 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:39,460 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 52 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:47:39,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-19 07:47:39,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-03-19 07:47:39,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:39,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-03-19 07:47:39,463 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-03-19 07:47:39,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:39,464 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-03-19 07:47:39,464 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:47:39,464 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-03-19 07:47:39,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 07:47:39,464 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:39,464 INFO L500 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:39,464 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-19 07:47:39,465 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:39,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:39,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1548536499, now seen corresponding path program 5 times [2022-03-19 07:47:39,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:39,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1002147037] [2022-03-19 07:47:39,566 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:39,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1233973106, now seen corresponding path program 1 times [2022-03-19 07:47:39,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:39,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85162437] [2022-03-19 07:47:39,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:39,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:39,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:39,603 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 07:47:39,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:39,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85162437] [2022-03-19 07:47:39,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85162437] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:39,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:39,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:39,659 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:39,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1002147037] [2022-03-19 07:47:39,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1002147037] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:39,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:39,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 07:47:39,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038843289] [2022-03-19 07:47:39,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:39,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 07:47:39,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:39,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 07:47:39,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-03-19 07:47:39,661 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 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 07:47:39,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:39,777 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-03-19 07:47:39,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 07:47:39,777 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 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 18 [2022-03-19 07:47:39,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:39,777 INFO L225 Difference]: With dead ends: 33 [2022-03-19 07:47:39,777 INFO L226 Difference]: Without dead ends: 23 [2022-03-19 07:47:39,778 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-19 07:47:39,778 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:39,779 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 57 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:47:39,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-19 07:47:39,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-19 07:47:39,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:39,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-03-19 07:47:39,782 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2022-03-19 07:47:39,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:39,782 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-03-19 07:47:39,782 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 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 07:47:39,782 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-03-19 07:47:39,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-19 07:47:39,782 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:39,782 INFO L500 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:39,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-19 07:47:39,783 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:39,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:39,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1416072615, now seen corresponding path program 6 times [2022-03-19 07:47:39,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:39,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1217079962] [2022-03-19 07:47:39,935 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:39,935 INFO L85 PathProgramCache]: Analyzing trace with hash -268312370, now seen corresponding path program 1 times [2022-03-19 07:47:39,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:39,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857565178] [2022-03-19 07:47:39,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:39,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:39,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:39,985 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 07:47:39,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:39,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857565178] [2022-03-19 07:47:39,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857565178] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:39,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:39,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:40,049 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:40,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1217079962] [2022-03-19 07:47:40,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1217079962] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:40,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:40,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 07:47:40,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038359033] [2022-03-19 07:47:40,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:40,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 07:47:40,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:40,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 07:47:40,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-03-19 07:47:40,051 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 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 07:47:40,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:40,191 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-03-19 07:47:40,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 07:47:40,191 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 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 19 [2022-03-19 07:47:40,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:40,191 INFO L225 Difference]: With dead ends: 34 [2022-03-19 07:47:40,192 INFO L226 Difference]: Without dead ends: 24 [2022-03-19 07:47:40,192 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-19 07:47:40,192 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:40,193 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 62 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:47:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-19 07:47:40,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-19 07:47:40,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-03-19 07:47:40,196 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2022-03-19 07:47:40,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:40,196 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-03-19 07:47:40,196 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 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 07:47:40,196 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-03-19 07:47:40,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 07:47:40,196 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:40,196 INFO L500 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:40,197 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-19 07:47:40,197 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:40,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:40,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1170325363, now seen corresponding path program 7 times [2022-03-19 07:47:40,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:40,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [52965534] [2022-03-19 07:47:40,335 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:40,336 INFO L85 PathProgramCache]: Analyzing trace with hash 697348366, now seen corresponding path program 1 times [2022-03-19 07:47:40,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:40,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446825742] [2022-03-19 07:47:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:40,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:40,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:40,400 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 07:47:40,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:40,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446825742] [2022-03-19 07:47:40,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446825742] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:40,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:40,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:40,480 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:40,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [52965534] [2022-03-19 07:47:40,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [52965534] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:40,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:40,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 07:47:40,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571303684] [2022-03-19 07:47:40,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:40,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 07:47:40,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:40,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 07:47:40,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-03-19 07:47:40,481 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 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 07:47:40,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:40,641 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2022-03-19 07:47:40,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 07:47:40,642 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 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 20 [2022-03-19 07:47:40,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:40,642 INFO L225 Difference]: With dead ends: 35 [2022-03-19 07:47:40,642 INFO L226 Difference]: Without dead ends: 25 [2022-03-19 07:47:40,642 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-03-19 07:47:40,643 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:40,643 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 67 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:47:40,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-19 07:47:40,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-19 07:47:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:40,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-03-19 07:47:40,646 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2022-03-19 07:47:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:40,646 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-03-19 07:47:40,647 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 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 07:47:40,647 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-03-19 07:47:40,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 07:47:40,647 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:40,647 INFO L500 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:40,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-19 07:47:40,647 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:40,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:40,647 INFO L85 PathProgramCache]: Analyzing trace with hash 255715943, now seen corresponding path program 8 times [2022-03-19 07:47:40,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:40,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1955231366] [2022-03-19 07:47:40,787 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:40,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1663009102, now seen corresponding path program 1 times [2022-03-19 07:47:40,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:40,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746370138] [2022-03-19 07:47:40,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:40,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:40,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:40,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:40,835 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 07:47:40,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:40,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746370138] [2022-03-19 07:47:40,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746370138] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:40,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:40,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:40,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:40,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1955231366] [2022-03-19 07:47:40,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1955231366] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:40,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:40,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 07:47:40,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654868655] [2022-03-19 07:47:40,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:40,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 07:47:40,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:40,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 07:47:40,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-03-19 07:47:40,935 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 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 07:47:41,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:41,090 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2022-03-19 07:47:41,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 07:47:41,090 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 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 21 [2022-03-19 07:47:41,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:41,091 INFO L225 Difference]: With dead ends: 36 [2022-03-19 07:47:41,091 INFO L226 Difference]: Without dead ends: 26 [2022-03-19 07:47:41,091 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-03-19 07:47:41,093 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:41,093 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 72 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:47:41,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-19 07:47:41,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-19 07:47:41,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:41,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-03-19 07:47:41,096 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2022-03-19 07:47:41,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:41,096 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-03-19 07:47:41,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 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 07:47:41,096 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-03-19 07:47:41,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 07:47:41,096 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:41,097 INFO L500 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:41,097 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-19 07:47:41,097 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:41,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:41,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1513323469, now seen corresponding path program 9 times [2022-03-19 07:47:41,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:41,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1563546881] [2022-03-19 07:47:41,213 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:41,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1666297458, now seen corresponding path program 1 times [2022-03-19 07:47:41,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:41,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133103880] [2022-03-19 07:47:41,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:41,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:41,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:41,271 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 07:47:41,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:41,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133103880] [2022-03-19 07:47:41,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133103880] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:41,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:41,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:41,374 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:41,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1563546881] [2022-03-19 07:47:41,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1563546881] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:41,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:41,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 07:47:41,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145045386] [2022-03-19 07:47:41,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:41,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 07:47:41,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:41,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 07:47:41,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-03-19 07:47:41,376 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 15 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 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 07:47:41,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:41,574 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-03-19 07:47:41,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 07:47:41,574 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 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 22 [2022-03-19 07:47:41,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:41,575 INFO L225 Difference]: With dead ends: 37 [2022-03-19 07:47:41,575 INFO L226 Difference]: Without dead ends: 27 [2022-03-19 07:47:41,575 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-03-19 07:47:41,576 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:41,576 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 77 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:47:41,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-19 07:47:41,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-19 07:47:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:41,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-03-19 07:47:41,579 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2022-03-19 07:47:41,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:41,579 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-03-19 07:47:41,579 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 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 07:47:41,579 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-03-19 07:47:41,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 07:47:41,580 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:41,580 INFO L500 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:41,580 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-19 07:47:41,580 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:41,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:41,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1844451111, now seen corresponding path program 10 times [2022-03-19 07:47:41,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:41,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [344753745] [2022-03-19 07:47:41,704 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:41,704 INFO L85 PathProgramCache]: Analyzing trace with hash -700636722, now seen corresponding path program 1 times [2022-03-19 07:47:41,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:41,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986582305] [2022-03-19 07:47:41,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:41,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:41,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:41,754 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 07:47:41,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:41,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986582305] [2022-03-19 07:47:41,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986582305] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:41,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:41,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:41,875 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:41,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [344753745] [2022-03-19 07:47:41,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [344753745] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:41,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:41,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 07:47:41,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709273276] [2022-03-19 07:47:41,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:41,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 07:47:41,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:41,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 07:47:41,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-03-19 07:47:41,877 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 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 07:47:42,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:42,095 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2022-03-19 07:47:42,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 07:47:42,096 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 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 23 [2022-03-19 07:47:42,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:42,096 INFO L225 Difference]: With dead ends: 38 [2022-03-19 07:47:42,096 INFO L226 Difference]: Without dead ends: 28 [2022-03-19 07:47:42,097 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-03-19 07:47:42,097 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:42,097 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 82 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:47:42,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-19 07:47:42,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-19 07:47:42,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:42,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-03-19 07:47:42,101 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2022-03-19 07:47:42,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:42,102 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-03-19 07:47:42,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 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 07:47:42,102 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-03-19 07:47:42,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-19 07:47:42,102 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:42,102 INFO L500 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:42,102 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-19 07:47:42,102 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:42,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:42,103 INFO L85 PathProgramCache]: Analyzing trace with hash -775493875, now seen corresponding path program 11 times [2022-03-19 07:47:42,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:42,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [779431705] [2022-03-19 07:47:42,240 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:42,240 INFO L85 PathProgramCache]: Analyzing trace with hash 265024014, now seen corresponding path program 1 times [2022-03-19 07:47:42,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:42,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879808844] [2022-03-19 07:47:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:42,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:42,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:42,286 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 07:47:42,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:42,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879808844] [2022-03-19 07:47:42,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879808844] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:42,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:42,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:42,413 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:42,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [779431705] [2022-03-19 07:47:42,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [779431705] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:42,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:42,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 07:47:42,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707374542] [2022-03-19 07:47:42,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:42,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 07:47:42,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:42,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 07:47:42,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2022-03-19 07:47:42,414 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 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 07:47:42,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:42,706 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2022-03-19 07:47:42,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 07:47:42,706 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 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 24 [2022-03-19 07:47:42,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:42,707 INFO L225 Difference]: With dead ends: 39 [2022-03-19 07:47:42,707 INFO L226 Difference]: Without dead ends: 29 [2022-03-19 07:47:42,707 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-03-19 07:47:42,708 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:42,708 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 87 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:47:42,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-19 07:47:42,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-19 07:47:42,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:42,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-03-19 07:47:42,711 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2022-03-19 07:47:42,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:42,711 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-03-19 07:47:42,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 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 07:47:42,711 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-03-19 07:47:42,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-19 07:47:42,711 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:42,711 INFO L500 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:42,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-19 07:47:42,712 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:42,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:42,712 INFO L85 PathProgramCache]: Analyzing trace with hash -389409817, now seen corresponding path program 12 times [2022-03-19 07:47:42,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:42,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [534526730] [2022-03-19 07:47:42,835 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:42,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1230684750, now seen corresponding path program 1 times [2022-03-19 07:47:42,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:42,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013472641] [2022-03-19 07:47:42,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:42,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:42,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:42,871 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 07:47:42,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:42,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013472641] [2022-03-19 07:47:42,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013472641] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:42,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:42,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:43,011 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:43,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [534526730] [2022-03-19 07:47:43,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [534526730] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:43,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:43,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 07:47:43,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283183977] [2022-03-19 07:47:43,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:43,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 07:47:43,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:43,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 07:47:43,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2022-03-19 07:47:43,012 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 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 07:47:43,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:43,301 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-03-19 07:47:43,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 07:47:43,301 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 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 25 [2022-03-19 07:47:43,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:43,301 INFO L225 Difference]: With dead ends: 40 [2022-03-19 07:47:43,301 INFO L226 Difference]: Without dead ends: 30 [2022-03-19 07:47:43,302 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-03-19 07:47:43,302 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:43,303 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 92 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:47:43,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-19 07:47:43,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-19 07:47:43,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:43,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-03-19 07:47:43,305 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2022-03-19 07:47:43,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:43,305 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-03-19 07:47:43,305 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 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 07:47:43,306 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-03-19 07:47:43,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 07:47:43,306 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:43,306 INFO L500 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:43,306 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-19 07:47:43,306 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:43,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:43,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1305705907, now seen corresponding path program 13 times [2022-03-19 07:47:43,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:43,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [270127886] [2022-03-19 07:47:43,438 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:43,438 INFO L85 PathProgramCache]: Analyzing trace with hash -2098621810, now seen corresponding path program 1 times [2022-03-19 07:47:43,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:43,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411388024] [2022-03-19 07:47:43,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:43,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:43,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:43,468 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 07:47:43,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:43,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411388024] [2022-03-19 07:47:43,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411388024] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:43,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:43,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:43,636 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:43,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [270127886] [2022-03-19 07:47:43,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [270127886] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:43,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:43,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 07:47:43,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687427604] [2022-03-19 07:47:43,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:43,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 07:47:43,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:43,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 07:47:43,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2022-03-19 07:47:43,637 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 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 07:47:43,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:43,951 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2022-03-19 07:47:43,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 07:47:43,951 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 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 26 [2022-03-19 07:47:43,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:43,952 INFO L225 Difference]: With dead ends: 41 [2022-03-19 07:47:43,952 INFO L226 Difference]: Without dead ends: 31 [2022-03-19 07:47:43,952 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 07:47:43,953 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:43,953 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 97 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:47:43,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-19 07:47:43,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-19 07:47:43,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:43,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-03-19 07:47:43,955 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2022-03-19 07:47:43,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:43,956 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-03-19 07:47:43,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 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 07:47:43,956 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-03-19 07:47:43,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 07:47:43,956 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:43,956 INFO L500 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:43,956 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-19 07:47:43,956 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:43,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:43,957 INFO L85 PathProgramCache]: Analyzing trace with hash 353886375, now seen corresponding path program 14 times [2022-03-19 07:47:43,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:43,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1093478856] [2022-03-19 07:47:44,097 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:44,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1132961074, now seen corresponding path program 1 times [2022-03-19 07:47:44,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:44,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703084952] [2022-03-19 07:47:44,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:44,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:44,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:44,127 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 07:47:44,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:44,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703084952] [2022-03-19 07:47:44,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703084952] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:44,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:44,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:44,291 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:44,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1093478856] [2022-03-19 07:47:44,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1093478856] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:44,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:44,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 07:47:44,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69199958] [2022-03-19 07:47:44,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:44,292 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 07:47:44,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:44,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 07:47:44,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2022-03-19 07:47:44,292 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 20 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 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 07:47:44,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:44,614 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-03-19 07:47:44,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 07:47:44,614 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 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 27 [2022-03-19 07:47:44,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:44,615 INFO L225 Difference]: With dead ends: 42 [2022-03-19 07:47:44,615 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 07:47:44,616 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 07:47:44,616 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:44,616 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 102 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:47:44,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 07:47:44,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-19 07:47:44,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:44,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-03-19 07:47:44,619 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2022-03-19 07:47:44,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:44,620 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-03-19 07:47:44,620 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 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 07:47:44,620 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-03-19 07:47:44,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 07:47:44,620 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:44,620 INFO L500 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:44,620 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-19 07:47:44,620 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:44,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:44,621 INFO L85 PathProgramCache]: Analyzing trace with hash 261639565, now seen corresponding path program 15 times [2022-03-19 07:47:44,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:44,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1501191018] [2022-03-19 07:47:44,736 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:44,736 INFO L85 PathProgramCache]: Analyzing trace with hash -167300338, now seen corresponding path program 1 times [2022-03-19 07:47:44,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:44,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902591009] [2022-03-19 07:47:44,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:44,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:44,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:44,778 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 07:47:44,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:44,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902591009] [2022-03-19 07:47:44,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902591009] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:44,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:44,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:44,975 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:44,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1501191018] [2022-03-19 07:47:44,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1501191018] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:44,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:44,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 07:47:44,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850060052] [2022-03-19 07:47:44,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:44,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 07:47:44,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:44,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 07:47:44,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2022-03-19 07:47:44,977 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 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 07:47:45,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:45,351 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2022-03-19 07:47:45,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 07:47:45,352 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 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 28 [2022-03-19 07:47:45,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:45,352 INFO L225 Difference]: With dead ends: 43 [2022-03-19 07:47:45,352 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 07:47:45,353 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 07:47:45,353 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:45,353 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 107 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:47:45,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 07:47:45,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-19 07:47:45,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:45,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-03-19 07:47:45,356 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2022-03-19 07:47:45,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:45,356 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-03-19 07:47:45,356 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 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 07:47:45,357 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-03-19 07:47:45,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 07:47:45,357 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:45,357 INFO L500 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:45,357 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-19 07:47:45,357 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:45,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:45,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1696955751, now seen corresponding path program 16 times [2022-03-19 07:47:45,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:45,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [78920988] [2022-03-19 07:47:45,460 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:45,460 INFO L85 PathProgramCache]: Analyzing trace with hash 798360398, now seen corresponding path program 1 times [2022-03-19 07:47:45,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:45,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748943236] [2022-03-19 07:47:45,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:45,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:45,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:45,497 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 07:47:45,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:45,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748943236] [2022-03-19 07:47:45,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748943236] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:45,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:45,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:45,716 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:45,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [78920988] [2022-03-19 07:47:45,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [78920988] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:45,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:45,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 07:47:45,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128124484] [2022-03-19 07:47:45,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:45,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 07:47:45,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:45,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 07:47:45,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2022-03-19 07:47:45,718 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 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 07:47:46,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:46,116 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-03-19 07:47:46,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 07:47:46,116 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 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 29 [2022-03-19 07:47:46,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:46,117 INFO L225 Difference]: With dead ends: 44 [2022-03-19 07:47:46,117 INFO L226 Difference]: Without dead ends: 34 [2022-03-19 07:47:46,117 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 07:47:46,118 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:46,118 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 112 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:47:46,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-19 07:47:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-19 07:47:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-03-19 07:47:46,121 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2022-03-19 07:47:46,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:46,121 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-03-19 07:47:46,121 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 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 07:47:46,121 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-03-19 07:47:46,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 07:47:46,122 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:46,122 INFO L500 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:46,122 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-19 07:47:46,122 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:46,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:46,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1052882739, now seen corresponding path program 17 times [2022-03-19 07:47:46,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:46,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1808758603] [2022-03-19 07:47:46,246 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:46,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1764021134, now seen corresponding path program 1 times [2022-03-19 07:47:46,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:46,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944098735] [2022-03-19 07:47:46,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:46,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:46,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:46,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:46,279 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 07:47:46,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:46,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944098735] [2022-03-19 07:47:46,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944098735] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:46,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:46,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:46,514 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:46,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1808758603] [2022-03-19 07:47:46,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1808758603] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:46,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:46,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 07:47:46,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773766685] [2022-03-19 07:47:46,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:46,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 07:47:46,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:46,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 07:47:46,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2022-03-19 07:47:46,515 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 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 07:47:46,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:46,912 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2022-03-19 07:47:46,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 07:47:46,913 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 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 30 [2022-03-19 07:47:46,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:46,913 INFO L225 Difference]: With dead ends: 45 [2022-03-19 07:47:46,913 INFO L226 Difference]: Without dead ends: 35 [2022-03-19 07:47:46,914 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 07:47:46,914 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:46,914 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 117 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:47:46,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-19 07:47:46,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-19 07:47:46,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:46,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-03-19 07:47:46,917 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2022-03-19 07:47:46,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:46,917 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-03-19 07:47:46,917 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 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 07:47:46,917 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-03-19 07:47:46,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 07:47:46,918 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:46,918 INFO L500 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:46,918 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-19 07:47:46,918 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:46,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:46,918 INFO L85 PathProgramCache]: Analyzing trace with hash -398530009, now seen corresponding path program 18 times [2022-03-19 07:47:46,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:46,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [794300066] [2022-03-19 07:47:47,031 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:47,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1565285426, now seen corresponding path program 1 times [2022-03-19 07:47:47,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:47,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584442777] [2022-03-19 07:47:47,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:47,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:47,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:47,060 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 07:47:47,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:47,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584442777] [2022-03-19 07:47:47,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584442777] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:47,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:47,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:47,306 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:47,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [794300066] [2022-03-19 07:47:47,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [794300066] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:47,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:47,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 07:47:47,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242519052] [2022-03-19 07:47:47,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:47,307 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 07:47:47,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:47,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 07:47:47,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2022-03-19 07:47:47,307 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 24 states, 24 states have (on average 1.125) internal successors, (27), 23 states have internal predecessors, (27), 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 07:47:47,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:47,778 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2022-03-19 07:47:47,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 07:47:47,778 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.125) internal successors, (27), 23 states have internal predecessors, (27), 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 31 [2022-03-19 07:47:47,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:47,778 INFO L225 Difference]: With dead ends: 46 [2022-03-19 07:47:47,779 INFO L226 Difference]: Without dead ends: 36 [2022-03-19 07:47:47,779 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 07:47:47,780 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:47,780 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 122 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:47:47,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-19 07:47:47,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-19 07:47:47,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-03-19 07:47:47,783 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2022-03-19 07:47:47,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:47,783 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-03-19 07:47:47,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.125) internal successors, (27), 23 states have internal predecessors, (27), 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 07:47:47,783 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-03-19 07:47:47,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 07:47:47,783 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:47,783 INFO L500 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:47,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-19 07:47:47,783 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:47,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:47,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1588431859, now seen corresponding path program 19 times [2022-03-19 07:47:47,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:47,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1819935278] [2022-03-19 07:47:47,930 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:47,930 INFO L85 PathProgramCache]: Analyzing trace with hash -599624690, now seen corresponding path program 1 times [2022-03-19 07:47:47,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:47,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979826773] [2022-03-19 07:47:47,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:47,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:47,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:47,962 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 07:47:47,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:47,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979826773] [2022-03-19 07:47:47,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979826773] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:47,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:47,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:48,209 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:48,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1819935278] [2022-03-19 07:47:48,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1819935278] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:48,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:48,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 07:47:48,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549763906] [2022-03-19 07:47:48,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:48,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 07:47:48,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:48,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 07:47:48,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2022-03-19 07:47:48,211 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 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 07:47:48,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:48,702 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2022-03-19 07:47:48,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 07:47:48,703 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 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 32 [2022-03-19 07:47:48,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:48,703 INFO L225 Difference]: With dead ends: 47 [2022-03-19 07:47:48,703 INFO L226 Difference]: Without dead ends: 37 [2022-03-19 07:47:48,705 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 07:47:48,706 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:48,706 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 127 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:47:48,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-19 07:47:48,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-19 07:47:48,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:48,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-03-19 07:47:48,713 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2022-03-19 07:47:48,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:48,714 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-03-19 07:47:48,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 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 07:47:48,714 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-03-19 07:47:48,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 07:47:48,715 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:48,715 INFO L500 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:48,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-19 07:47:48,715 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:48,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:48,715 INFO L85 PathProgramCache]: Analyzing trace with hash 179316455, now seen corresponding path program 20 times [2022-03-19 07:47:48,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:48,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1141962291] [2022-03-19 07:47:48,844 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:48,845 INFO L85 PathProgramCache]: Analyzing trace with hash 366036046, now seen corresponding path program 1 times [2022-03-19 07:47:48,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:48,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997720348] [2022-03-19 07:47:48,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:48,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:48,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:48,883 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 07:47:48,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:48,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997720348] [2022-03-19 07:47:48,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997720348] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:48,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:48,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:49,171 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:49,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1141962291] [2022-03-19 07:47:49,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1141962291] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:49,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:49,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 07:47:49,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302385536] [2022-03-19 07:47:49,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:49,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 07:47:49,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:49,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 07:47:49,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2022-03-19 07:47:49,173 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 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 07:47:49,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:49,681 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-03-19 07:47:49,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 07:47:49,682 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 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 33 [2022-03-19 07:47:49,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:49,682 INFO L225 Difference]: With dead ends: 48 [2022-03-19 07:47:49,682 INFO L226 Difference]: Without dead ends: 38 [2022-03-19 07:47:49,683 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 07:47:49,683 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:49,683 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 132 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:47:49,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-19 07:47:49,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-19 07:47:49,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:49,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-03-19 07:47:49,686 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2022-03-19 07:47:49,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:49,686 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-03-19 07:47:49,686 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 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 07:47:49,686 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-03-19 07:47:49,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 07:47:49,687 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:49,687 INFO L500 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:49,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-19 07:47:49,687 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:49,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:49,687 INFO L85 PathProgramCache]: Analyzing trace with hash -855060659, now seen corresponding path program 21 times [2022-03-19 07:47:49,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:49,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1570641616] [2022-03-19 07:47:49,814 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:49,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1331696782, now seen corresponding path program 1 times [2022-03-19 07:47:49,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:49,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145767216] [2022-03-19 07:47:49,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:49,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:49,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:49,853 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 07:47:49,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:49,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145767216] [2022-03-19 07:47:49,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145767216] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:49,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:49,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:50,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:50,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1570641616] [2022-03-19 07:47:50,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1570641616] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:50,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:50,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-19 07:47:50,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002093070] [2022-03-19 07:47:50,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:50,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 07:47:50,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:50,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 07:47:50,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2022-03-19 07:47:50,177 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 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 07:47:50,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:50,730 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2022-03-19 07:47:50,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 07:47:50,730 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 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 34 [2022-03-19 07:47:50,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:50,731 INFO L225 Difference]: With dead ends: 49 [2022-03-19 07:47:50,731 INFO L226 Difference]: Without dead ends: 39 [2022-03-19 07:47:50,731 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 07:47:50,732 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:50,732 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 137 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:47:50,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-19 07:47:50,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-19 07:47:50,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:50,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-03-19 07:47:50,735 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2022-03-19 07:47:50,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:50,735 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-03-19 07:47:50,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 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 07:47:50,735 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-03-19 07:47:50,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 07:47:50,735 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:50,735 INFO L500 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:50,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-19 07:47:50,736 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:50,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:50,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1438987175, now seen corresponding path program 22 times [2022-03-19 07:47:50,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:50,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [773630404] [2022-03-19 07:47:50,851 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:50,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1997609778, now seen corresponding path program 1 times [2022-03-19 07:47:50,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:50,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719152848] [2022-03-19 07:47:50,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:50,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:50,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:50,899 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 07:47:50,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:50,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719152848] [2022-03-19 07:47:50,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719152848] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:50,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:50,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:51,220 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:51,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [773630404] [2022-03-19 07:47:51,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [773630404] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:51,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:51,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-19 07:47:51,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099944952] [2022-03-19 07:47:51,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:51,220 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 07:47:51,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:51,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 07:47:51,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2022-03-19 07:47:51,221 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 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 07:47:51,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:51,822 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2022-03-19 07:47:51,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 07:47:51,822 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 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 35 [2022-03-19 07:47:51,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:51,823 INFO L225 Difference]: With dead ends: 50 [2022-03-19 07:47:51,823 INFO L226 Difference]: Without dead ends: 40 [2022-03-19 07:47:51,824 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 07:47:51,824 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:51,824 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 142 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:47:51,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-19 07:47:51,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-19 07:47:51,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:51,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-03-19 07:47:51,827 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2022-03-19 07:47:51,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:51,827 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-03-19 07:47:51,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 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 07:47:51,827 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-03-19 07:47:51,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 07:47:51,827 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:51,827 INFO L500 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:51,828 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-19 07:47:51,828 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:51,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:51,828 INFO L85 PathProgramCache]: Analyzing trace with hash -459974003, now seen corresponding path program 23 times [2022-03-19 07:47:51,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:51,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1991514095] [2022-03-19 07:47:51,948 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:51,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1031949042, now seen corresponding path program 1 times [2022-03-19 07:47:51,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:51,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526503155] [2022-03-19 07:47:51,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:51,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:51,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:51,984 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 07:47:51,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:51,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526503155] [2022-03-19 07:47:51,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526503155] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:51,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:51,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:52,324 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:52,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1991514095] [2022-03-19 07:47:52,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1991514095] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:52,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:52,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-19 07:47:52,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200416842] [2022-03-19 07:47:52,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:52,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-19 07:47:52,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:52,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-19 07:47:52,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2022-03-19 07:47:52,326 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 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 07:47:52,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:52,980 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2022-03-19 07:47:52,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 07:47:52,981 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 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 36 [2022-03-19 07:47:52,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:52,981 INFO L225 Difference]: With dead ends: 51 [2022-03-19 07:47:52,981 INFO L226 Difference]: Without dead ends: 41 [2022-03-19 07:47:52,982 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 07:47:52,982 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:52,982 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 147 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:47:52,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-19 07:47:52,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-19 07:47:52,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:52,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-03-19 07:47:52,985 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2022-03-19 07:47:52,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:52,985 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-03-19 07:47:52,985 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 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 07:47:52,985 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-03-19 07:47:52,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 07:47:52,985 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:52,985 INFO L500 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:52,985 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-19 07:47:52,986 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:52,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:52,986 INFO L85 PathProgramCache]: Analyzing trace with hash 801771623, now seen corresponding path program 24 times [2022-03-19 07:47:52,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:52,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1343480183] [2022-03-19 07:47:53,107 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:53,107 INFO L85 PathProgramCache]: Analyzing trace with hash -66288306, now seen corresponding path program 1 times [2022-03-19 07:47:53,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:53,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781685534] [2022-03-19 07:47:53,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:53,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:53,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:53,148 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 07:47:53,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:53,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781685534] [2022-03-19 07:47:53,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781685534] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:53,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:53,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:53,510 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:53,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1343480183] [2022-03-19 07:47:53,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1343480183] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:53,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:53,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-19 07:47:53,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655745289] [2022-03-19 07:47:53,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:53,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-19 07:47:53,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:53,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-19 07:47:53,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2022-03-19 07:47:53,511 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 30 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 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 07:47:54,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:54,213 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2022-03-19 07:47:54,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 07:47:54,214 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 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 37 [2022-03-19 07:47:54,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:54,214 INFO L225 Difference]: With dead ends: 52 [2022-03-19 07:47:54,214 INFO L226 Difference]: Without dead ends: 42 [2022-03-19 07:47:54,215 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2022-03-19 07:47:54,215 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:54,216 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 152 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:47:54,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-19 07:47:54,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-03-19 07:47:54,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:54,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-03-19 07:47:54,218 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2022-03-19 07:47:54,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:54,218 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-03-19 07:47:54,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 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 07:47:54,219 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-03-19 07:47:54,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 07:47:54,219 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:54,219 INFO L500 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:54,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-19 07:47:54,219 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:54,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:54,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1261180365, now seen corresponding path program 25 times [2022-03-19 07:47:54,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:54,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [372259051] [2022-03-19 07:47:54,312 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:54,312 INFO L85 PathProgramCache]: Analyzing trace with hash 899372430, now seen corresponding path program 1 times [2022-03-19 07:47:54,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:54,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744735196] [2022-03-19 07:47:54,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:54,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:54,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:54,356 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 07:47:54,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:54,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744735196] [2022-03-19 07:47:54,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744735196] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:54,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:54,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:54,728 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:54,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [372259051] [2022-03-19 07:47:54,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [372259051] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:54,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:54,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-19 07:47:54,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704135899] [2022-03-19 07:47:54,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:54,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-19 07:47:54,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:54,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-19 07:47:54,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2022-03-19 07:47:54,729 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 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 07:47:55,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:55,434 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2022-03-19 07:47:55,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 07:47:55,435 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 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 38 [2022-03-19 07:47:55,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:55,435 INFO L225 Difference]: With dead ends: 53 [2022-03-19 07:47:55,435 INFO L226 Difference]: Without dead ends: 43 [2022-03-19 07:47:55,436 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2022-03-19 07:47:55,438 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:55,438 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 157 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:47:55,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-19 07:47:55,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-19 07:47:55,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-03-19 07:47:55,441 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2022-03-19 07:47:55,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:55,441 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-03-19 07:47:55,441 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 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 07:47:55,441 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-03-19 07:47:55,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 07:47:55,441 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:55,441 INFO L500 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:55,441 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-19 07:47:55,441 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:55,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:55,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1677017817, now seen corresponding path program 26 times [2022-03-19 07:47:55,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:55,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1917743323] [2022-03-19 07:47:55,571 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:55,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1865033166, now seen corresponding path program 1 times [2022-03-19 07:47:55,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:55,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381174616] [2022-03-19 07:47:55,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:55,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:55,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:55,619 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 07:47:55,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:55,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381174616] [2022-03-19 07:47:55,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381174616] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:55,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:55,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:56,063 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:56,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1917743323] [2022-03-19 07:47:56,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1917743323] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:56,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:56,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-19 07:47:56,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340197352] [2022-03-19 07:47:56,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:56,064 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 07:47:56,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:56,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 07:47:56,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 07:47:56,065 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 32 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 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 07:47:56,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:56,878 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2022-03-19 07:47:56,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 07:47:56,879 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 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 39 [2022-03-19 07:47:56,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:56,879 INFO L225 Difference]: With dead ends: 54 [2022-03-19 07:47:56,879 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 07:47:56,880 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=3366, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 07:47:56,881 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:56,881 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 162 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:47:56,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 07:47:56,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-19 07:47:56,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:56,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-03-19 07:47:56,883 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2022-03-19 07:47:56,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:56,883 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-03-19 07:47:56,884 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 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 07:47:56,884 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-03-19 07:47:56,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-19 07:47:56,884 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:56,884 INFO L500 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:56,884 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-19 07:47:56,884 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:56,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:56,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1728119053, now seen corresponding path program 27 times [2022-03-19 07:47:56,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:56,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [769641780] [2022-03-19 07:47:57,006 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:57,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1464273394, now seen corresponding path program 1 times [2022-03-19 07:47:57,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:57,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659808550] [2022-03-19 07:47:57,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:57,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:57,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:57,038 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 07:47:57,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:57,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659808550] [2022-03-19 07:47:57,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659808550] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:57,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:57,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:57,483 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:57,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [769641780] [2022-03-19 07:47:57,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [769641780] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:57,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:57,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-19 07:47:57,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026236605] [2022-03-19 07:47:57,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:57,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-19 07:47:57,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:57,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-19 07:47:57,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 07:47:57,486 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 33 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 32 states have internal predecessors, (36), 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 07:47:58,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:58,326 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2022-03-19 07:47:58,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 07:47:58,326 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 32 states have internal predecessors, (36), 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 40 [2022-03-19 07:47:58,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:58,326 INFO L225 Difference]: With dead ends: 55 [2022-03-19 07:47:58,326 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 07:47:58,327 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=180, Invalid=3602, Unknown=0, NotChecked=0, Total=3782 [2022-03-19 07:47:58,328 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:58,328 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 167 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:47:58,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 07:47:58,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-19 07:47:58,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:58,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-03-19 07:47:58,330 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2022-03-19 07:47:58,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:58,330 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-03-19 07:47:58,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 32 states have internal predecessors, (36), 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 07:47:58,330 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-03-19 07:47:58,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 07:47:58,331 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:58,331 INFO L500 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:58,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-19 07:47:58,331 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:58,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:58,331 INFO L85 PathProgramCache]: Analyzing trace with hash -86820377, now seen corresponding path program 28 times [2022-03-19 07:47:58,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:58,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [678645237] [2022-03-19 07:47:58,418 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:58,419 INFO L85 PathProgramCache]: Analyzing trace with hash -498612658, now seen corresponding path program 1 times [2022-03-19 07:47:58,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:58,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678704158] [2022-03-19 07:47:58,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:58,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:58,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:58,454 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 07:47:58,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:58,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678704158] [2022-03-19 07:47:58,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678704158] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:58,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:58,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:47:58,902 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:58,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [678645237] [2022-03-19 07:47:58,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [678645237] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:58,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:58,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-19 07:47:58,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496112007] [2022-03-19 07:47:58,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:58,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-19 07:47:58,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:58,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-19 07:47:58,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 07:47:58,904 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 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 07:47:59,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:59,784 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2022-03-19 07:47:59,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 07:47:59,784 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 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 41 [2022-03-19 07:47:59,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:59,785 INFO L225 Difference]: With dead ends: 56 [2022-03-19 07:47:59,785 INFO L226 Difference]: Without dead ends: 46 [2022-03-19 07:47:59,786 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=186, Invalid=3846, Unknown=0, NotChecked=0, Total=4032 [2022-03-19 07:47:59,786 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:59,786 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 172 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:47:59,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-19 07:47:59,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-19 07:47:59,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:47:59,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-03-19 07:47:59,789 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2022-03-19 07:47:59,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:59,789 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-03-19 07:47:59,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 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 07:47:59,789 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-03-19 07:47:59,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 07:47:59,789 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:59,789 INFO L500 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:59,790 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-19 07:47:59,790 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:59,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:59,790 INFO L85 PathProgramCache]: Analyzing trace with hash -515367859, now seen corresponding path program 29 times [2022-03-19 07:47:59,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:59,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2001696636] [2022-03-19 07:47:59,908 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:47:59,908 INFO L85 PathProgramCache]: Analyzing trace with hash 467048078, now seen corresponding path program 1 times [2022-03-19 07:47:59,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:59,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92030363] [2022-03-19 07:47:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:59,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:59,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:59,939 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 07:47:59,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:59,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92030363] [2022-03-19 07:47:59,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92030363] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:59,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:59,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:48:00,451 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:00,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2001696636] [2022-03-19 07:48:00,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2001696636] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:00,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:00,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-19 07:48:00,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343821403] [2022-03-19 07:48:00,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:00,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-19 07:48:00,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:00,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-19 07:48:00,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 07:48:00,452 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 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 07:48:01,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:01,375 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2022-03-19 07:48:01,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 07:48:01,376 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 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 42 [2022-03-19 07:48:01,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:01,376 INFO L225 Difference]: With dead ends: 57 [2022-03-19 07:48:01,376 INFO L226 Difference]: Without dead ends: 47 [2022-03-19 07:48:01,377 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=4098, Unknown=0, NotChecked=0, Total=4290 [2022-03-19 07:48:01,378 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:01,378 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 177 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:48:01,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-19 07:48:01,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-19 07:48:01,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:48:01,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-03-19 07:48:01,380 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2022-03-19 07:48:01,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:01,380 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-03-19 07:48:01,380 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 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 07:48:01,381 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-03-19 07:48:01,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 07:48:01,381 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:01,381 INFO L500 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:01,381 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-19 07:48:01,381 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:01,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:01,381 INFO L85 PathProgramCache]: Analyzing trace with hash -915437913, now seen corresponding path program 30 times [2022-03-19 07:48:01,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:01,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [853679374] [2022-03-19 07:48:01,467 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:48:01,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1432708814, now seen corresponding path program 1 times [2022-03-19 07:48:01,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:01,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632696736] [2022-03-19 07:48:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:01,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:01,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:01,503 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 07:48:01,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:01,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632696736] [2022-03-19 07:48:01,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632696736] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:01,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:01,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:48:02,041 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:02,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [853679374] [2022-03-19 07:48:02,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [853679374] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:02,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:02,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-19 07:48:02,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203046768] [2022-03-19 07:48:02,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:02,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-19 07:48:02,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:02,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-19 07:48:02,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 07:48:02,042 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 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 07:48:03,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:03,024 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2022-03-19 07:48:03,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 07:48:03,025 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 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 43 [2022-03-19 07:48:03,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:03,025 INFO L225 Difference]: With dead ends: 58 [2022-03-19 07:48:03,025 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 07:48:03,026 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=198, Invalid=4358, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 07:48:03,026 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:03,027 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 182 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1422 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:48:03,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 07:48:03,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-19 07:48:03,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:48:03,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-03-19 07:48:03,029 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 43 [2022-03-19 07:48:03,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:03,029 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-03-19 07:48:03,029 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 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 07:48:03,029 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-03-19 07:48:03,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 07:48:03,029 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:03,030 INFO L500 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:03,030 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-19 07:48:03,030 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:03,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:03,030 INFO L85 PathProgramCache]: Analyzing trace with hash -432707699, now seen corresponding path program 31 times [2022-03-19 07:48:03,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:03,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [406317966] [2022-03-19 07:48:03,147 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:48:03,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1896597746, now seen corresponding path program 1 times [2022-03-19 07:48:03,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:03,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23746593] [2022-03-19 07:48:03,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:03,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:03,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:03,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:03,178 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 07:48:03,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:03,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23746593] [2022-03-19 07:48:03,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23746593] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:03,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:03,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:48:03,720 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:03,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [406317966] [2022-03-19 07:48:03,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [406317966] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:03,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:03,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-19 07:48:03,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063009445] [2022-03-19 07:48:03,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:03,721 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-19 07:48:03,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:03,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-19 07:48:03,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 07:48:03,722 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 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 07:48:04,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:04,855 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2022-03-19 07:48:04,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 07:48:04,856 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 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 44 [2022-03-19 07:48:04,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:04,856 INFO L225 Difference]: With dead ends: 59 [2022-03-19 07:48:04,856 INFO L226 Difference]: Without dead ends: 49 [2022-03-19 07:48:04,857 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=204, Invalid=4626, Unknown=0, NotChecked=0, Total=4830 [2022-03-19 07:48:04,857 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:04,858 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 187 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:48:04,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-19 07:48:04,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-19 07:48:04,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:48:04,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-03-19 07:48:04,860 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2022-03-19 07:48:04,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:04,860 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-03-19 07:48:04,860 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 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 07:48:04,860 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-03-19 07:48:04,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 07:48:04,861 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:04,861 INFO L500 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:04,861 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-19 07:48:04,861 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:04,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:04,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1647027047, now seen corresponding path program 32 times [2022-03-19 07:48:04,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:04,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [72605493] [2022-03-19 07:48:04,997 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:48:04,998 INFO L85 PathProgramCache]: Analyzing trace with hash -930937010, now seen corresponding path program 1 times [2022-03-19 07:48:04,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:04,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335694407] [2022-03-19 07:48:04,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:04,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:05,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:05,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:05,028 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 07:48:05,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:05,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335694407] [2022-03-19 07:48:05,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335694407] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:05,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:05,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:48:05,615 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:05,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [72605493] [2022-03-19 07:48:05,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [72605493] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:05,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:05,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-19 07:48:05,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434254549] [2022-03-19 07:48:05,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:05,616 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-19 07:48:05,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:05,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-19 07:48:05,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 07:48:05,617 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 38 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 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 07:48:06,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:06,791 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-03-19 07:48:06,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 07:48:06,791 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 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 45 [2022-03-19 07:48:06,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:06,791 INFO L225 Difference]: With dead ends: 60 [2022-03-19 07:48:06,792 INFO L226 Difference]: Without dead ends: 50 [2022-03-19 07:48:06,792 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=210, Invalid=4902, Unknown=0, NotChecked=0, Total=5112 [2022-03-19 07:48:06,792 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 1578 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:06,793 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 192 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1578 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:48:06,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-19 07:48:06,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-03-19 07:48:06,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:48:06,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2022-03-19 07:48:06,795 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2022-03-19 07:48:06,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:06,795 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2022-03-19 07:48:06,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 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 07:48:06,795 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2022-03-19 07:48:06,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 07:48:06,796 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:06,796 INFO L500 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:06,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-19 07:48:06,796 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:06,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:06,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1694294733, now seen corresponding path program 33 times [2022-03-19 07:48:06,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:06,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [84437560] [2022-03-19 07:48:06,923 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:48:06,924 INFO L85 PathProgramCache]: Analyzing trace with hash 34723726, now seen corresponding path program 1 times [2022-03-19 07:48:06,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:06,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027932809] [2022-03-19 07:48:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:06,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:06,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:06,965 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 07:48:06,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:06,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027932809] [2022-03-19 07:48:06,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027932809] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:06,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:06,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:48:07,567 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:07,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [84437560] [2022-03-19 07:48:07,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [84437560] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:07,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:07,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-19 07:48:07,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173995363] [2022-03-19 07:48:07,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:07,567 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-19 07:48:07,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:07,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-19 07:48:07,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 07:48:07,568 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 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 07:48:08,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:08,786 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2022-03-19 07:48:08,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-19 07:48:08,787 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 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 46 [2022-03-19 07:48:08,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:08,787 INFO L225 Difference]: With dead ends: 61 [2022-03-19 07:48:08,787 INFO L226 Difference]: Without dead ends: 51 [2022-03-19 07:48:08,788 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=216, Invalid=5186, Unknown=0, NotChecked=0, Total=5402 [2022-03-19 07:48:08,788 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:08,788 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 197 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1659 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:48:08,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-19 07:48:08,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-19 07:48:08,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:48:08,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-03-19 07:48:08,791 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2022-03-19 07:48:08,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:08,791 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-03-19 07:48:08,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 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 07:48:08,791 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-03-19 07:48:08,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 07:48:08,791 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:08,792 INFO L500 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:08,792 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-19 07:48:08,792 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:08,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:08,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1135374297, now seen corresponding path program 34 times [2022-03-19 07:48:08,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:08,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1754905413] [2022-03-19 07:48:08,913 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:48:08,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1000384462, now seen corresponding path program 1 times [2022-03-19 07:48:08,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:08,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447531598] [2022-03-19 07:48:08,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:08,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:08,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:08,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:08,958 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 07:48:08,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:08,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447531598] [2022-03-19 07:48:08,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447531598] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:08,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:08,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:48:09,558 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:09,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1754905413] [2022-03-19 07:48:09,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1754905413] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:09,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:09,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-19 07:48:09,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585165422] [2022-03-19 07:48:09,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:09,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-19 07:48:09,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:09,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-19 07:48:09,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 07:48:09,560 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 40 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 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 07:48:10,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:10,793 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2022-03-19 07:48:10,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 07:48:10,794 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 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 47 [2022-03-19 07:48:10,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:10,794 INFO L225 Difference]: With dead ends: 62 [2022-03-19 07:48:10,794 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 07:48:10,795 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=222, Invalid=5478, Unknown=0, NotChecked=0, Total=5700 [2022-03-19 07:48:10,795 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 1779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:10,795 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 202 Invalid, 1779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1742 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 07:48:10,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 07:48:10,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-19 07:48:10,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:48:10,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-03-19 07:48:10,798 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2022-03-19 07:48:10,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:10,798 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-03-19 07:48:10,798 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 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 07:48:10,798 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-03-19 07:48:10,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 07:48:10,799 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:10,799 INFO L500 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:10,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-19 07:48:10,799 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:10,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:10,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1339198989, now seen corresponding path program 35 times [2022-03-19 07:48:10,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:10,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1684543073] [2022-03-19 07:48:10,884 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:48:10,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1966045198, now seen corresponding path program 1 times [2022-03-19 07:48:10,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:10,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138772376] [2022-03-19 07:48:10,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:10,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:10,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:10,918 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 07:48:10,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:10,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138772376] [2022-03-19 07:48:10,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138772376] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:10,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:10,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:48:11,539 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:11,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1684543073] [2022-03-19 07:48:11,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1684543073] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:11,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:11,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-19 07:48:11,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902535584] [2022-03-19 07:48:11,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:11,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-19 07:48:11,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:11,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-19 07:48:11,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 07:48:11,540 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 41 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 40 states have internal predecessors, (44), 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 07:48:12,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:12,854 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2022-03-19 07:48:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 07:48:12,854 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 40 states have internal predecessors, (44), 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 48 [2022-03-19 07:48:12,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:12,855 INFO L225 Difference]: With dead ends: 63 [2022-03-19 07:48:12,855 INFO L226 Difference]: Without dead ends: 53 [2022-03-19 07:48:12,856 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=228, Invalid=5778, Unknown=0, NotChecked=0, Total=6006 [2022-03-19 07:48:12,856 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1827 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 1865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:12,856 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 207 Invalid, 1865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1827 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 07:48:12,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-19 07:48:12,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-03-19 07:48:12,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:48:12,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-03-19 07:48:12,859 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 48 [2022-03-19 07:48:12,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:12,859 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-03-19 07:48:12,859 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 40 states have internal predecessors, (44), 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 07:48:12,859 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-03-19 07:48:12,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 07:48:12,859 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:12,859 INFO L500 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:12,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-19 07:48:12,860 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:12,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:12,860 INFO L85 PathProgramCache]: Analyzing trace with hash 741559527, now seen corresponding path program 36 times [2022-03-19 07:48:12,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:12,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [833639358] [2022-03-19 07:48:12,951 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:48:12,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1363261362, now seen corresponding path program 1 times [2022-03-19 07:48:12,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:12,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409612485] [2022-03-19 07:48:12,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:12,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:12,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:12,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:12,987 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 07:48:12,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:12,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409612485] [2022-03-19 07:48:12,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409612485] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:12,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:12,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:48:13,668 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:13,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [833639358] [2022-03-19 07:48:13,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [833639358] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:13,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:13,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-19 07:48:13,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727749089] [2022-03-19 07:48:13,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:13,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-19 07:48:13,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:13,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-19 07:48:13,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 07:48:13,671 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 42 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 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 07:48:15,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:15,149 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2022-03-19 07:48:15,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 07:48:15,150 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 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 49 [2022-03-19 07:48:15,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:15,150 INFO L225 Difference]: With dead ends: 64 [2022-03-19 07:48:15,150 INFO L226 Difference]: Without dead ends: 54 [2022-03-19 07:48:15,151 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=234, Invalid=6086, Unknown=0, NotChecked=0, Total=6320 [2022-03-19 07:48:15,152 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 1914 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:15,152 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 212 Invalid, 1953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1914 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 07:48:15,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-19 07:48:15,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-19 07:48:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:48:15,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-03-19 07:48:15,155 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2022-03-19 07:48:15,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:15,155 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-03-19 07:48:15,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 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 07:48:15,155 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-03-19 07:48:15,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 07:48:15,155 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:15,155 INFO L500 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:15,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-19 07:48:15,155 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:15,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:15,156 INFO L85 PathProgramCache]: Analyzing trace with hash -605394611, now seen corresponding path program 37 times [2022-03-19 07:48:15,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:15,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [342156644] [2022-03-19 07:48:15,297 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:48:15,297 INFO L85 PathProgramCache]: Analyzing trace with hash -397600626, now seen corresponding path program 1 times [2022-03-19 07:48:15,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:15,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982901449] [2022-03-19 07:48:15,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:15,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:15,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:15,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:15,328 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 07:48:15,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:15,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982901449] [2022-03-19 07:48:15,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982901449] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:15,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:15,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:48:15,995 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:15,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [342156644] [2022-03-19 07:48:15,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [342156644] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:15,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:15,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-19 07:48:15,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788555954] [2022-03-19 07:48:15,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:15,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-19 07:48:15,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:15,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-19 07:48:15,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 07:48:15,996 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 43 states, 43 states have (on average 1.069767441860465) internal successors, (46), 42 states have internal predecessors, (46), 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 07:48:17,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:17,549 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2022-03-19 07:48:17,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-19 07:48:17,550 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.069767441860465) internal successors, (46), 42 states have internal predecessors, (46), 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 50 [2022-03-19 07:48:17,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:17,550 INFO L225 Difference]: With dead ends: 65 [2022-03-19 07:48:17,550 INFO L226 Difference]: Without dead ends: 55 [2022-03-19 07:48:17,551 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=240, Invalid=6402, Unknown=0, NotChecked=0, Total=6642 [2022-03-19 07:48:17,551 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 2003 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 2043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:17,551 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 217 Invalid, 2043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2003 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 07:48:17,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-19 07:48:17,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-19 07:48:17,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:48:17,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-03-19 07:48:17,554 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2022-03-19 07:48:17,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:17,554 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-03-19 07:48:17,554 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.069767441860465) internal successors, (46), 42 states have internal predecessors, (46), 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 07:48:17,554 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-03-19 07:48:17,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 07:48:17,555 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:17,555 INFO L500 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:17,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-19 07:48:17,555 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:17,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:17,555 INFO L85 PathProgramCache]: Analyzing trace with hash 588700071, now seen corresponding path program 38 times [2022-03-19 07:48:17,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:17,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1132088742] [2022-03-19 07:48:17,681 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:48:17,682 INFO L85 PathProgramCache]: Analyzing trace with hash 568060110, now seen corresponding path program 1 times [2022-03-19 07:48:17,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:17,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750524068] [2022-03-19 07:48:17,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:17,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:17,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:17,720 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 07:48:17,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:17,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750524068] [2022-03-19 07:48:17,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750524068] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:17,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:17,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:48:18,447 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:18,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1132088742] [2022-03-19 07:48:18,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1132088742] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:18,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:18,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-19 07:48:18,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773091021] [2022-03-19 07:48:18,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:18,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-19 07:48:18,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:18,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-19 07:48:18,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 07:48:18,448 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 44 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 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 07:48:20,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:20,090 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2022-03-19 07:48:20,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-19 07:48:20,091 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 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 51 [2022-03-19 07:48:20,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:20,091 INFO L225 Difference]: With dead ends: 66 [2022-03-19 07:48:20,091 INFO L226 Difference]: Without dead ends: 56 [2022-03-19 07:48:20,092 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=246, Invalid=6726, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 07:48:20,092 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 2094 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 2135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:20,092 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 222 Invalid, 2135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2094 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 07:48:20,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-19 07:48:20,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-19 07:48:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:48:20,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-03-19 07:48:20,095 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2022-03-19 07:48:20,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:20,095 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-03-19 07:48:20,095 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 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 07:48:20,095 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-03-19 07:48:20,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 07:48:20,096 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:20,096 INFO L500 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:20,096 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-19 07:48:20,096 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:20,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:20,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1049070451, now seen corresponding path program 39 times [2022-03-19 07:48:20,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:20,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1305689285] [2022-03-19 07:48:20,248 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:48:20,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1533720846, now seen corresponding path program 1 times [2022-03-19 07:48:20,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:20,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96939831] [2022-03-19 07:48:20,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:20,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:20,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:20,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:20,276 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 07:48:20,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:20,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96939831] [2022-03-19 07:48:20,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96939831] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:20,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:20,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:48:21,147 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:21,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1305689285] [2022-03-19 07:48:21,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1305689285] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:21,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:21,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-19 07:48:21,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774165550] [2022-03-19 07:48:21,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:21,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-19 07:48:21,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:21,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-19 07:48:21,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 07:48:21,149 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 45 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 44 states have internal predecessors, (48), 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 07:48:22,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:22,927 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2022-03-19 07:48:22,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-19 07:48:22,928 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 44 states have internal predecessors, (48), 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 52 [2022-03-19 07:48:22,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:22,929 INFO L225 Difference]: With dead ends: 67 [2022-03-19 07:48:22,929 INFO L226 Difference]: Without dead ends: 57 [2022-03-19 07:48:22,929 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=252, Invalid=7058, Unknown=0, NotChecked=0, Total=7310 [2022-03-19 07:48:22,929 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 2187 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:22,930 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 227 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2187 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 07:48:22,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-19 07:48:22,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-19 07:48:22,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:48:22,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-03-19 07:48:22,933 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2022-03-19 07:48:22,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:22,933 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-03-19 07:48:22,933 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 44 states have internal predecessors, (48), 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 07:48:22,933 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-03-19 07:48:22,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 07:48:22,933 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:22,933 INFO L500 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:22,933 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-19 07:48:22,933 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:22,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:22,934 INFO L85 PathProgramCache]: Analyzing trace with hash -280349081, now seen corresponding path program 40 times [2022-03-19 07:48:22,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:22,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [557060308] [2022-03-19 07:48:23,034 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:48:23,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1795585714, now seen corresponding path program 1 times [2022-03-19 07:48:23,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:23,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669685809] [2022-03-19 07:48:23,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:23,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:23,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:23,076 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 07:48:23,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:23,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669685809] [2022-03-19 07:48:23,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669685809] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:23,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:23,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:48:23,863 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:23,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [557060308] [2022-03-19 07:48:23,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [557060308] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:23,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:23,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-19 07:48:23,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879562748] [2022-03-19 07:48:23,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:23,864 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-19 07:48:23,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:23,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-19 07:48:23,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 07:48:23,866 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 46 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 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 07:48:25,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:25,690 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2022-03-19 07:48:25,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 07:48:25,690 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 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 53 [2022-03-19 07:48:25,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:25,691 INFO L225 Difference]: With dead ends: 68 [2022-03-19 07:48:25,691 INFO L226 Difference]: Without dead ends: 58 [2022-03-19 07:48:25,692 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=258, Invalid=7398, Unknown=0, NotChecked=0, Total=7656 [2022-03-19 07:48:25,692 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 2282 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 2325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:25,692 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 232 Invalid, 2325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2282 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 07:48:25,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-19 07:48:25,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-03-19 07:48:25,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:48:25,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-03-19 07:48:25,695 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2022-03-19 07:48:25,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:25,695 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-03-19 07:48:25,695 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 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 07:48:25,695 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-03-19 07:48:25,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 07:48:25,696 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:25,696 INFO L500 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:25,696 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-19 07:48:25,696 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:25,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:25,696 INFO L85 PathProgramCache]: Analyzing trace with hash 2075176909, now seen corresponding path program 41 times [2022-03-19 07:48:25,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:25,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2147364740] [2022-03-19 07:48:25,784 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:48:25,784 INFO L85 PathProgramCache]: Analyzing trace with hash -829924978, now seen corresponding path program 1 times [2022-03-19 07:48:25,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:25,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924847306] [2022-03-19 07:48:25,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:25,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:25,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:25,822 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 07:48:25,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:25,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924847306] [2022-03-19 07:48:25,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924847306] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:25,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:25,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:48:26,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:26,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2147364740] [2022-03-19 07:48:26,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2147364740] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:26,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:26,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-19 07:48:26,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489399184] [2022-03-19 07:48:26,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:26,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-19 07:48:26,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:26,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-19 07:48:26,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 07:48:26,674 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 47 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 46 states have internal predecessors, (50), 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 07:48:28,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:28,743 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2022-03-19 07:48:28,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-19 07:48:28,743 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 46 states have internal predecessors, (50), 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 54 [2022-03-19 07:48:28,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:28,743 INFO L225 Difference]: With dead ends: 69 [2022-03-19 07:48:28,744 INFO L226 Difference]: Without dead ends: 59 [2022-03-19 07:48:28,744 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=264, Invalid=7746, Unknown=0, NotChecked=0, Total=8010 [2022-03-19 07:48:28,744 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 2379 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:28,744 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 237 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2379 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 07:48:28,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-19 07:48:28,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-03-19 07:48:28,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:48:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-03-19 07:48:28,747 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2022-03-19 07:48:28,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:28,747 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-03-19 07:48:28,747 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 46 states have internal predecessors, (50), 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 07:48:28,747 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-03-19 07:48:28,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 07:48:28,748 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:28,748 INFO L500 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:28,748 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-03-19 07:48:28,748 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:28,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:28,748 INFO L85 PathProgramCache]: Analyzing trace with hash 2082038567, now seen corresponding path program 42 times [2022-03-19 07:48:28,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:28,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2022299419] [2022-03-19 07:48:28,880 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:48:28,881 INFO L85 PathProgramCache]: Analyzing trace with hash 135735758, now seen corresponding path program 1 times [2022-03-19 07:48:28,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:28,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361777590] [2022-03-19 07:48:28,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:28,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:28,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:28,918 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 07:48:28,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:28,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361777590] [2022-03-19 07:48:28,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361777590] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:28,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:28,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:48:29,797 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:29,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2022299419] [2022-03-19 07:48:29,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2022299419] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:29,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:29,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-19 07:48:29,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659794465] [2022-03-19 07:48:29,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:29,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-19 07:48:29,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:29,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-19 07:48:29,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 07:48:29,798 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 48 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 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 07:48:31,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:31,784 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2022-03-19 07:48:31,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-19 07:48:31,785 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 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 55 [2022-03-19 07:48:31,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:31,786 INFO L225 Difference]: With dead ends: 70 [2022-03-19 07:48:31,786 INFO L226 Difference]: Without dead ends: 60 [2022-03-19 07:48:31,786 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=270, Invalid=8102, Unknown=0, NotChecked=0, Total=8372 [2022-03-19 07:48:31,787 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 2478 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 2523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:31,787 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 242 Invalid, 2523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2478 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 07:48:31,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-19 07:48:31,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-03-19 07:48:31,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:48:31,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-03-19 07:48:31,790 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2022-03-19 07:48:31,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:31,790 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-03-19 07:48:31,790 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 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 07:48:31,790 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-03-19 07:48:31,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 07:48:31,790 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:31,790 INFO L500 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:31,790 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-03-19 07:48:31,791 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:31,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:31,791 INFO L85 PathProgramCache]: Analyzing trace with hash -2000217331, now seen corresponding path program 43 times [2022-03-19 07:48:31,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:31,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1268201182] [2022-03-19 07:48:31,919 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:48:31,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1101396494, now seen corresponding path program 1 times [2022-03-19 07:48:31,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:31,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224812207] [2022-03-19 07:48:31,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:31,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:32,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:32,067 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 07:48:32,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:32,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224812207] [2022-03-19 07:48:32,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224812207] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:32,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:32,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:48:32,972 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:32,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1268201182] [2022-03-19 07:48:32,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1268201182] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:32,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:32,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-19 07:48:32,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365494883] [2022-03-19 07:48:32,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:32,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-19 07:48:32,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:32,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-19 07:48:32,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 07:48:32,974 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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 07:48:35,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:35,205 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2022-03-19 07:48:35,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-19 07:48:35,205 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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 56 [2022-03-19 07:48:35,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:35,206 INFO L225 Difference]: With dead ends: 71 [2022-03-19 07:48:35,206 INFO L226 Difference]: Without dead ends: 61 [2022-03-19 07:48:35,207 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=276, Invalid=8466, Unknown=0, NotChecked=0, Total=8742 [2022-03-19 07:48:35,207 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 2579 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 2625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:35,207 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 247 Invalid, 2625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2579 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 07:48:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-19 07:48:35,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-19 07:48:35,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:48:35,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-03-19 07:48:35,210 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2022-03-19 07:48:35,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:35,210 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-03-19 07:48:35,211 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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 07:48:35,211 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-03-19 07:48:35,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 07:48:35,211 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:35,211 INFO L500 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:35,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-03-19 07:48:35,211 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:35,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:35,211 INFO L85 PathProgramCache]: Analyzing trace with hash 298868711, now seen corresponding path program 44 times [2022-03-19 07:48:35,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:35,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1934346114] [2022-03-19 07:48:35,355 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:48:35,356 INFO L85 PathProgramCache]: Analyzing trace with hash 2067057230, now seen corresponding path program 1 times [2022-03-19 07:48:35,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:35,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960425773] [2022-03-19 07:48:35,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:35,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:35,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:35,382 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 07:48:35,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:35,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960425773] [2022-03-19 07:48:35,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960425773] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:35,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:35,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:48:36,294 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:36,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1934346114] [2022-03-19 07:48:36,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1934346114] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:36,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:36,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-19 07:48:36,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232685831] [2022-03-19 07:48:36,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:36,294 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-19 07:48:36,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:36,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-19 07:48:36,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 07:48:36,295 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 50 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 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 07:48:38,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:38,624 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2022-03-19 07:48:38,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-19 07:48:38,624 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 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 57 [2022-03-19 07:48:38,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:38,624 INFO L225 Difference]: With dead ends: 72 [2022-03-19 07:48:38,625 INFO L226 Difference]: Without dead ends: 62 [2022-03-19 07:48:38,625 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=282, Invalid=8838, Unknown=0, NotChecked=0, Total=9120 [2022-03-19 07:48:38,626 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 2682 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 2729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:38,626 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 252 Invalid, 2729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2682 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-19 07:48:38,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-19 07:48:38,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-03-19 07:48:38,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:48:38,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2022-03-19 07:48:38,629 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 57 [2022-03-19 07:48:38,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:38,629 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2022-03-19 07:48:38,629 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 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 07:48:38,629 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2022-03-19 07:48:38,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 07:48:38,629 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:38,629 INFO L500 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:38,629 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-03-19 07:48:38,630 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:38,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:38,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1443908019, now seen corresponding path program 45 times [2022-03-19 07:48:38,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:38,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1807140216] [2022-03-19 07:48:38,759 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:48:38,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1262249330, now seen corresponding path program 1 times [2022-03-19 07:48:38,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:38,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72125807] [2022-03-19 07:48:38,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:38,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:38,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:38,787 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 07:48:38,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:38,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72125807] [2022-03-19 07:48:38,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72125807] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:38,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:38,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:48:39,736 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:39,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1807140216] [2022-03-19 07:48:39,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1807140216] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:39,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:39,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-19 07:48:39,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331269289] [2022-03-19 07:48:39,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:39,736 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-19 07:48:39,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:39,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-19 07:48:39,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 07:48:39,737 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 51 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 50 states have internal predecessors, (54), 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 07:48:42,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:42,197 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2022-03-19 07:48:42,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-19 07:48:42,198 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 50 states have internal predecessors, (54), 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 58 [2022-03-19 07:48:42,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:42,198 INFO L225 Difference]: With dead ends: 73 [2022-03-19 07:48:42,198 INFO L226 Difference]: Without dead ends: 63 [2022-03-19 07:48:42,199 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=288, Invalid=9218, Unknown=0, NotChecked=0, Total=9506 [2022-03-19 07:48:42,199 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 2787 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 2835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:42,199 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 257 Invalid, 2835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2787 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-19 07:48:42,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-19 07:48:42,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-03-19 07:48:42,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:48:42,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-03-19 07:48:42,202 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2022-03-19 07:48:42,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:42,202 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-03-19 07:48:42,202 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 50 states have internal predecessors, (54), 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 07:48:42,202 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-03-19 07:48:42,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 07:48:42,203 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:42,203 INFO L500 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:42,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-03-19 07:48:42,203 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:42,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:42,203 INFO L85 PathProgramCache]: Analyzing trace with hash 364588199, now seen corresponding path program 46 times [2022-03-19 07:48:42,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:42,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [947619617] [2022-03-19 07:48:42,296 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:48:42,296 INFO L85 PathProgramCache]: Analyzing trace with hash -296588594, now seen corresponding path program 1 times [2022-03-19 07:48:42,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:42,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487190712] [2022-03-19 07:48:42,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:42,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:42,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:42,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:42,342 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 07:48:42,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:42,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487190712] [2022-03-19 07:48:42,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487190712] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:42,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:42,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:48:43,356 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:43,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [947619617] [2022-03-19 07:48:43,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [947619617] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:43,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:43,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-19 07:48:43,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510253390] [2022-03-19 07:48:43,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:43,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-19 07:48:43,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:43,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-19 07:48:43,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 07:48:43,358 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 52 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 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 07:48:45,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:45,969 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2022-03-19 07:48:45,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-19 07:48:45,970 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 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 59 [2022-03-19 07:48:45,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:45,970 INFO L225 Difference]: With dead ends: 74 [2022-03-19 07:48:45,971 INFO L226 Difference]: Without dead ends: 64 [2022-03-19 07:48:45,972 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=294, Invalid=9606, Unknown=0, NotChecked=0, Total=9900 [2022-03-19 07:48:45,972 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 2894 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 2943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:45,972 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 262 Invalid, 2943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2894 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-19 07:48:45,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-19 07:48:45,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-03-19 07:48:45,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:48:45,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-03-19 07:48:45,976 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2022-03-19 07:48:45,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:45,976 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-03-19 07:48:45,976 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 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 07:48:45,976 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-03-19 07:48:45,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-19 07:48:45,976 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:45,976 INFO L500 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:45,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-03-19 07:48:45,976 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:45,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:45,977 INFO L85 PathProgramCache]: Analyzing trace with hash 593396109, now seen corresponding path program 47 times [2022-03-19 07:48:45,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:45,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2046934626] [2022-03-19 07:48:46,070 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:48:46,071 INFO L85 PathProgramCache]: Analyzing trace with hash 669072142, now seen corresponding path program 1 times [2022-03-19 07:48:46,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:46,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639358018] [2022-03-19 07:48:46,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:46,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:46,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:46,101 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 07:48:46,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:46,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639358018] [2022-03-19 07:48:46,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639358018] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:46,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:46,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:48:47,149 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:47,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2046934626] [2022-03-19 07:48:47,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2046934626] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:47,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:47,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-19 07:48:47,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354059040] [2022-03-19 07:48:47,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:47,149 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-19 07:48:47,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:47,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-19 07:48:47,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 07:48:47,150 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 53 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 52 states have internal predecessors, (56), 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 07:48:49,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:49,901 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2022-03-19 07:48:49,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-19 07:48:49,902 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 52 states have internal predecessors, (56), 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 60 [2022-03-19 07:48:49,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:49,902 INFO L225 Difference]: With dead ends: 75 [2022-03-19 07:48:49,902 INFO L226 Difference]: Without dead ends: 65 [2022-03-19 07:48:49,903 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=300, Invalid=10002, Unknown=0, NotChecked=0, Total=10302 [2022-03-19 07:48:49,903 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 3003 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 3053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 3003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:49,903 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 267 Invalid, 3053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 3003 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-19 07:48:49,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-19 07:48:49,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-19 07:48:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:48:49,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-03-19 07:48:49,906 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2022-03-19 07:48:49,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:49,907 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-03-19 07:48:49,907 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 52 states have internal predecessors, (56), 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 07:48:49,907 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-03-19 07:48:49,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 07:48:49,907 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:49,907 INFO L500 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:49,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-03-19 07:48:49,907 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:49,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:49,907 INFO L85 PathProgramCache]: Analyzing trace with hash -903493273, now seen corresponding path program 48 times [2022-03-19 07:48:49,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:49,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1158478918] [2022-03-19 07:48:50,038 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:48:50,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1634732878, now seen corresponding path program 1 times [2022-03-19 07:48:50,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:50,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447026375] [2022-03-19 07:48:50,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:50,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:50,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:50,072 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 07:48:50,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:50,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447026375] [2022-03-19 07:48:50,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447026375] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:50,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:50,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:48:51,141 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:51,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1158478918] [2022-03-19 07:48:51,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1158478918] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:51,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:51,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-19 07:48:51,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176641560] [2022-03-19 07:48:51,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:51,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-19 07:48:51,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:51,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-19 07:48:51,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 07:48:51,143 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 54 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 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 07:48:54,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:54,065 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2022-03-19 07:48:54,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-19 07:48:54,066 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 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 61 [2022-03-19 07:48:54,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:54,067 INFO L225 Difference]: With dead ends: 76 [2022-03-19 07:48:54,067 INFO L226 Difference]: Without dead ends: 66 [2022-03-19 07:48:54,067 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=306, Invalid=10406, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:48:54,067 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 3114 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 3165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 3114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:54,068 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 272 Invalid, 3165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 3114 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-19 07:48:54,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-19 07:48:54,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-03-19 07:48:54,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:48:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-03-19 07:48:54,071 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 61 [2022-03-19 07:48:54,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:54,071 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-03-19 07:48:54,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 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 07:48:54,071 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-03-19 07:48:54,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-19 07:48:54,071 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:54,071 INFO L500 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:54,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-03-19 07:48:54,072 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:54,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:54,072 INFO L85 PathProgramCache]: Analyzing trace with hash -62423859, now seen corresponding path program 49 times [2022-03-19 07:48:54,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:54,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2108509963] [2022-03-19 07:48:54,224 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:48:54,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1694573682, now seen corresponding path program 1 times [2022-03-19 07:48:54,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:54,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936467437] [2022-03-19 07:48:54,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:54,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:54,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:54,271 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 07:48:54,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:54,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936467437] [2022-03-19 07:48:54,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936467437] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:54,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:54,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:48:55,362 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:55,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2108509963] [2022-03-19 07:48:55,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2108509963] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:55,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:55,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-19 07:48:55,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521162598] [2022-03-19 07:48:55,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:55,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-19 07:48:55,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:55,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-19 07:48:55,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2022-03-19 07:48:55,363 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 55 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 54 states have internal predecessors, (58), 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 07:48:58,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:58,336 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2022-03-19 07:48:58,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-19 07:48:58,337 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 54 states have internal predecessors, (58), 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 62 [2022-03-19 07:48:58,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:58,338 INFO L225 Difference]: With dead ends: 77 [2022-03-19 07:48:58,338 INFO L226 Difference]: Without dead ends: 67 [2022-03-19 07:48:58,339 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=312, Invalid=10818, Unknown=0, NotChecked=0, Total=11130 [2022-03-19 07:48:58,339 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 3227 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 3279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 3227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:58,339 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 277 Invalid, 3279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 3227 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-19 07:48:58,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-19 07:48:58,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-19 07:48:58,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:48:58,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-03-19 07:48:58,342 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2022-03-19 07:48:58,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:58,343 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-03-19 07:48:58,343 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 54 states have internal predecessors, (58), 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 07:48:58,343 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-03-19 07:48:58,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 07:48:58,346 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:58,346 INFO L500 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:58,346 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-03-19 07:48:58,346 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:58,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:58,346 INFO L85 PathProgramCache]: Analyzing trace with hash 240924199, now seen corresponding path program 50 times [2022-03-19 07:48:58,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:58,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2017144459] [2022-03-19 07:48:58,475 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:48:58,475 INFO L85 PathProgramCache]: Analyzing trace with hash -728912946, now seen corresponding path program 1 times [2022-03-19 07:48:58,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:58,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315310700] [2022-03-19 07:48:58,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:58,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:58,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:58,510 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 07:48:58,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:58,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315310700] [2022-03-19 07:48:58,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315310700] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:58,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:58,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:48:59,676 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:59,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2017144459] [2022-03-19 07:48:59,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2017144459] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:59,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:59,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-19 07:48:59,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592290959] [2022-03-19 07:48:59,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:59,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-19 07:48:59,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:59,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-19 07:48:59,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 07:48:59,678 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 56 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 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 07:49:03,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:03,067 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2022-03-19 07:49:03,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-19 07:49:03,067 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 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 63 [2022-03-19 07:49:03,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:03,068 INFO L225 Difference]: With dead ends: 78 [2022-03-19 07:49:03,068 INFO L226 Difference]: Without dead ends: 68 [2022-03-19 07:49:03,069 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=318, Invalid=11238, Unknown=0, NotChecked=0, Total=11556 [2022-03-19 07:49:03,069 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 3342 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 3395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 3342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:03,069 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 282 Invalid, 3395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 3342 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 07:49:03,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-19 07:49:03,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-03-19 07:49:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:49:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-03-19 07:49:03,072 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 63 [2022-03-19 07:49:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:03,072 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-03-19 07:49:03,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 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 07:49:03,073 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-03-19 07:49:03,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 07:49:03,073 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:03,073 INFO L500 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:03,073 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-03-19 07:49:03,073 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:03,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:03,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1054779405, now seen corresponding path program 51 times [2022-03-19 07:49:03,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:03,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1827023380] [2022-03-19 07:49:03,203 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:49:03,203 INFO L85 PathProgramCache]: Analyzing trace with hash 236747790, now seen corresponding path program 1 times [2022-03-19 07:49:03,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:03,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589930784] [2022-03-19 07:49:03,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:03,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:03,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:03,248 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 07:49:03,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:03,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589930784] [2022-03-19 07:49:03,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589930784] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:03,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:03,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:49:04,448 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:04,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1827023380] [2022-03-19 07:49:04,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1827023380] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:04,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:04,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-19 07:49:04,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782220810] [2022-03-19 07:49:04,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:04,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-19 07:49:04,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:04,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-19 07:49:04,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2022-03-19 07:49:04,450 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 57 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 56 states have internal predecessors, (60), 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 07:49:07,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:07,971 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2022-03-19 07:49:07,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-19 07:49:07,972 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 56 states have internal predecessors, (60), 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 64 [2022-03-19 07:49:07,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:07,972 INFO L225 Difference]: With dead ends: 79 [2022-03-19 07:49:07,972 INFO L226 Difference]: Without dead ends: 69 [2022-03-19 07:49:07,973 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=324, Invalid=11666, Unknown=0, NotChecked=0, Total=11990 [2022-03-19 07:49:07,974 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 3459 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 3513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 3459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:07,974 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 287 Invalid, 3513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3459 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-19 07:49:07,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-19 07:49:07,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-03-19 07:49:07,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:49:07,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-03-19 07:49:07,978 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2022-03-19 07:49:07,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:07,978 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-03-19 07:49:07,978 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 56 states have internal predecessors, (60), 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 07:49:07,978 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-03-19 07:49:07,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 07:49:07,978 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:07,978 INFO L500 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:07,978 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-03-19 07:49:07,979 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:07,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:07,979 INFO L85 PathProgramCache]: Analyzing trace with hash 514487015, now seen corresponding path program 52 times [2022-03-19 07:49:07,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:07,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1061508217] [2022-03-19 07:49:08,112 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:49:08,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1202408526, now seen corresponding path program 1 times [2022-03-19 07:49:08,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:08,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448896436] [2022-03-19 07:49:08,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:08,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:08,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:08,140 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 07:49:08,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:08,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448896436] [2022-03-19 07:49:08,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448896436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:08,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:08,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:49:09,368 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:09,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1061508217] [2022-03-19 07:49:09,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1061508217] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:09,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:09,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-19 07:49:09,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035469677] [2022-03-19 07:49:09,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:09,369 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-19 07:49:09,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:09,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-19 07:49:09,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 07:49:09,369 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 58 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 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 07:49:12,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:12,720 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2022-03-19 07:49:12,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-19 07:49:12,721 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 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 65 [2022-03-19 07:49:12,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:12,721 INFO L225 Difference]: With dead ends: 80 [2022-03-19 07:49:12,721 INFO L226 Difference]: Without dead ends: 70 [2022-03-19 07:49:12,722 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=330, Invalid=12102, Unknown=0, NotChecked=0, Total=12432 [2022-03-19 07:49:12,723 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 3578 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 3633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 3578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:12,723 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 292 Invalid, 3633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 3578 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-19 07:49:12,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-19 07:49:12,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-19 07:49:12,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:49:12,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-03-19 07:49:12,726 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 65 [2022-03-19 07:49:12,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:12,726 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-03-19 07:49:12,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 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 07:49:12,726 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-03-19 07:49:12,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-19 07:49:12,727 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:12,727 INFO L500 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:12,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-03-19 07:49:12,727 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:12,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:12,727 INFO L85 PathProgramCache]: Analyzing trace with hash 945292109, now seen corresponding path program 53 times [2022-03-19 07:49:12,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:12,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [164389806] [2022-03-19 07:49:12,820 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:49:12,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2126898034, now seen corresponding path program 1 times [2022-03-19 07:49:12,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:12,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047978046] [2022-03-19 07:49:12,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:12,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:12,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:12,849 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 07:49:12,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:12,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047978046] [2022-03-19 07:49:12,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047978046] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:12,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:12,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:49:14,142 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:14,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [164389806] [2022-03-19 07:49:14,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [164389806] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:14,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:14,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-19 07:49:14,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219101234] [2022-03-19 07:49:14,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:14,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-19 07:49:14,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:14,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-19 07:49:14,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 07:49:14,143 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 59 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 58 states have internal predecessors, (62), 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 07:49:18,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:18,086 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2022-03-19 07:49:18,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-19 07:49:18,087 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 58 states have internal predecessors, (62), 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 66 [2022-03-19 07:49:18,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:18,087 INFO L225 Difference]: With dead ends: 81 [2022-03-19 07:49:18,088 INFO L226 Difference]: Without dead ends: 71 [2022-03-19 07:49:18,089 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=336, Invalid=12546, Unknown=0, NotChecked=0, Total=12882 [2022-03-19 07:49:18,103 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 3699 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 3755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:18,103 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 297 Invalid, 3755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3699 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-19 07:49:18,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-19 07:49:18,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-19 07:49:18,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:49:18,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-03-19 07:49:18,107 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 66 [2022-03-19 07:49:18,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:18,107 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-03-19 07:49:18,107 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 58 states have internal predecessors, (62), 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 07:49:18,107 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-03-19 07:49:18,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 07:49:18,107 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:18,107 INFO L500 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:18,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-03-19 07:49:18,107 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:18,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:18,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1415348135, now seen corresponding path program 54 times [2022-03-19 07:49:18,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:18,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [12272246] [2022-03-19 07:49:18,253 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:49:18,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1161237298, now seen corresponding path program 1 times [2022-03-19 07:49:18,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:18,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430067835] [2022-03-19 07:49:18,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:18,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:18,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:18,287 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 07:49:18,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:18,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430067835] [2022-03-19 07:49:18,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430067835] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:18,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:18,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:49:19,611 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:19,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [12272246] [2022-03-19 07:49:19,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [12272246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:19,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:19,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-19 07:49:19,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654656545] [2022-03-19 07:49:19,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:19,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-19 07:49:19,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:19,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-19 07:49:19,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2022-03-19 07:49:19,613 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 60 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 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 07:49:23,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:23,448 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2022-03-19 07:49:23,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-19 07:49:23,449 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 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 67 [2022-03-19 07:49:23,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:23,449 INFO L225 Difference]: With dead ends: 82 [2022-03-19 07:49:23,449 INFO L226 Difference]: Without dead ends: 72 [2022-03-19 07:49:23,450 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=342, Invalid=12998, Unknown=0, NotChecked=0, Total=13340 [2022-03-19 07:49:23,451 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 3822 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 3879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 3822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:23,451 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 302 Invalid, 3879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 3822 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-19 07:49:23,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-19 07:49:23,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-03-19 07:49:23,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:49:23,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-03-19 07:49:23,458 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2022-03-19 07:49:23,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:23,458 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-03-19 07:49:23,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 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 07:49:23,458 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-03-19 07:49:23,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:49:23,459 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:23,459 INFO L500 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:23,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-03-19 07:49:23,459 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:23,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:23,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1192784243, now seen corresponding path program 55 times [2022-03-19 07:49:23,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:23,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [262270817] [2022-03-19 07:49:23,606 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:49:23,606 INFO L85 PathProgramCache]: Analyzing trace with hash -195576562, now seen corresponding path program 1 times [2022-03-19 07:49:23,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:23,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956640727] [2022-03-19 07:49:23,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:23,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:23,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:23,651 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 07:49:23,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:23,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956640727] [2022-03-19 07:49:23,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956640727] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:23,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:23,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:49:25,026 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:25,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [262270817] [2022-03-19 07:49:25,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [262270817] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:25,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:25,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-19 07:49:25,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209778569] [2022-03-19 07:49:25,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:25,027 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-19 07:49:25,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:25,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-19 07:49:25,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3659, Unknown=0, NotChecked=0, Total=3782 [2022-03-19 07:49:25,028 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 61 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 60 states have internal predecessors, (64), 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 07:49:29,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:29,129 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2022-03-19 07:49:29,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-19 07:49:29,130 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 60 states have internal predecessors, (64), 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 68 [2022-03-19 07:49:29,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:29,131 INFO L225 Difference]: With dead ends: 83 [2022-03-19 07:49:29,131 INFO L226 Difference]: Without dead ends: 73 [2022-03-19 07:49:29,132 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=348, Invalid=13458, Unknown=0, NotChecked=0, Total=13806 [2022-03-19 07:49:29,132 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 3947 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 4005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 3947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:29,132 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 307 Invalid, 4005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 3947 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-19 07:49:29,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-19 07:49:29,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-19 07:49:29,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:49:29,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-03-19 07:49:29,135 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2022-03-19 07:49:29,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:29,136 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-03-19 07:49:29,136 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 60 states have internal predecessors, (64), 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 07:49:29,136 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-03-19 07:49:29,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 07:49:29,136 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:29,136 INFO L500 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:29,136 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-03-19 07:49:29,136 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:29,137 INFO L85 PathProgramCache]: Analyzing trace with hash -440509337, now seen corresponding path program 56 times [2022-03-19 07:49:29,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:29,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1862908480] [2022-03-19 07:49:29,290 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:49:29,290 INFO L85 PathProgramCache]: Analyzing trace with hash 770084174, now seen corresponding path program 1 times [2022-03-19 07:49:29,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:29,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610158042] [2022-03-19 07:49:29,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:29,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:29,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:29,319 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 07:49:29,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:29,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610158042] [2022-03-19 07:49:29,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610158042] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:29,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:29,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:49:30,822 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:30,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1862908480] [2022-03-19 07:49:30,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1862908480] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:30,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:30,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-19 07:49:30,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046011491] [2022-03-19 07:49:30,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:30,823 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-19 07:49:30,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:30,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-19 07:49:30,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2022-03-19 07:49:30,824 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 62 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 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 07:49:35,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:35,333 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2022-03-19 07:49:35,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-19 07:49:35,334 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 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 69 [2022-03-19 07:49:35,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:35,334 INFO L225 Difference]: With dead ends: 84 [2022-03-19 07:49:35,334 INFO L226 Difference]: Without dead ends: 74 [2022-03-19 07:49:35,335 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=354, Invalid=13926, Unknown=0, NotChecked=0, Total=14280 [2022-03-19 07:49:35,336 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 4074 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 4133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 4074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:35,336 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 312 Invalid, 4133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 4074 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-19 07:49:35,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-19 07:49:35,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-19 07:49:35,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:49:35,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2022-03-19 07:49:35,339 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 69 [2022-03-19 07:49:35,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:35,339 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2022-03-19 07:49:35,339 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 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 07:49:35,339 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2022-03-19 07:49:35,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-19 07:49:35,340 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:35,340 INFO L500 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:35,340 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-03-19 07:49:35,340 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:35,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:35,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1405176269, now seen corresponding path program 57 times [2022-03-19 07:49:35,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:35,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1302990121] [2022-03-19 07:49:35,468 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:49:35,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1735744910, now seen corresponding path program 1 times [2022-03-19 07:49:35,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:35,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355705098] [2022-03-19 07:49:35,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:35,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:35,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:35,503 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 07:49:35,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:35,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355705098] [2022-03-19 07:49:35,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355705098] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:35,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:35,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:49:36,957 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:36,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1302990121] [2022-03-19 07:49:36,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1302990121] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:36,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:36,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-19 07:49:36,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108382981] [2022-03-19 07:49:36,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:36,958 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-19 07:49:36,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:36,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-19 07:49:36,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=3905, Unknown=0, NotChecked=0, Total=4032 [2022-03-19 07:49:36,959 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 63 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 62 states have internal predecessors, (66), 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 07:49:41,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:41,403 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2022-03-19 07:49:41,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-19 07:49:41,404 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 62 states have internal predecessors, (66), 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 70 [2022-03-19 07:49:41,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:41,404 INFO L225 Difference]: With dead ends: 85 [2022-03-19 07:49:41,404 INFO L226 Difference]: Without dead ends: 75 [2022-03-19 07:49:41,405 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=360, Invalid=14402, Unknown=0, NotChecked=0, Total=14762 [2022-03-19 07:49:41,406 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 4203 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 4263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 4203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:41,406 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 317 Invalid, 4263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 4203 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-19 07:49:41,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-19 07:49:41,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-03-19 07:49:41,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:49:41,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-03-19 07:49:41,409 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 70 [2022-03-19 07:49:41,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:41,409 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-03-19 07:49:41,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 62 states have internal predecessors, (66), 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 07:49:41,410 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-03-19 07:49:41,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 07:49:41,410 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:41,410 INFO L500 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:41,410 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-03-19 07:49:41,410 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:41,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:41,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1508112089, now seen corresponding path program 58 times [2022-03-19 07:49:41,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:41,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1439622677] [2022-03-19 07:49:41,504 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:49:41,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1593561650, now seen corresponding path program 1 times [2022-03-19 07:49:41,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:41,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781653099] [2022-03-19 07:49:41,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:41,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:41,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:41,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:41,543 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 07:49:41,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:41,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781653099] [2022-03-19 07:49:41,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781653099] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:41,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:41,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:49:43,057 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:43,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1439622677] [2022-03-19 07:49:43,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1439622677] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:43,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:43,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-19 07:49:43,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328386470] [2022-03-19 07:49:43,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:43,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-19 07:49:43,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:43,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-19 07:49:43,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2022-03-19 07:49:43,059 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 64 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 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 07:49:47,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:47,945 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2022-03-19 07:49:47,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-19 07:49:47,945 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 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 71 [2022-03-19 07:49:47,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:47,946 INFO L225 Difference]: With dead ends: 86 [2022-03-19 07:49:47,946 INFO L226 Difference]: Without dead ends: 76 [2022-03-19 07:49:47,947 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=366, Invalid=14886, Unknown=0, NotChecked=0, Total=15252 [2022-03-19 07:49:47,947 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 4334 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 4395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 4334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:47,947 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 322 Invalid, 4395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 4334 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-19 07:49:47,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-19 07:49:47,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-03-19 07:49:47,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:49:47,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-03-19 07:49:47,950 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2022-03-19 07:49:47,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:47,950 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-03-19 07:49:47,951 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 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 07:49:47,951 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-03-19 07:49:47,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-19 07:49:47,951 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:47,951 INFO L500 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:47,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-03-19 07:49:47,951 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:47,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:47,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1625737971, now seen corresponding path program 59 times [2022-03-19 07:49:47,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:47,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1104157596] [2022-03-19 07:49:48,096 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:49:48,096 INFO L85 PathProgramCache]: Analyzing trace with hash -627900914, now seen corresponding path program 1 times [2022-03-19 07:49:48,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:48,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827407467] [2022-03-19 07:49:48,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:48,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:48,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:48,172 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 07:49:48,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:48,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827407467] [2022-03-19 07:49:48,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827407467] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:48,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:48,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:49:49,708 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:49,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1104157596] [2022-03-19 07:49:49,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1104157596] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:49,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:49,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-19 07:49:49,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287864950] [2022-03-19 07:49:49,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:49,709 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-19 07:49:49,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:49,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-19 07:49:49,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4159, Unknown=0, NotChecked=0, Total=4290 [2022-03-19 07:49:49,710 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 65 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 64 states have internal predecessors, (68), 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 07:49:54,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:54,697 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2022-03-19 07:49:54,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-19 07:49:54,698 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 64 states have internal predecessors, (68), 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 72 [2022-03-19 07:49:54,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:54,698 INFO L225 Difference]: With dead ends: 87 [2022-03-19 07:49:54,698 INFO L226 Difference]: Without dead ends: 77 [2022-03-19 07:49:54,699 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=372, Invalid=15378, Unknown=0, NotChecked=0, Total=15750 [2022-03-19 07:49:54,700 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 4467 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 4529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 4467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:54,700 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 327 Invalid, 4529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 4467 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-19 07:49:54,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-19 07:49:54,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-03-19 07:49:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:49:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-03-19 07:49:54,703 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 72 [2022-03-19 07:49:54,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:54,704 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-03-19 07:49:54,704 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 64 states have internal predecessors, (68), 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 07:49:54,704 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-03-19 07:49:54,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 07:49:54,704 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:54,704 INFO L500 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:54,704 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-03-19 07:49:54,704 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:54,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:54,704 INFO L85 PathProgramCache]: Analyzing trace with hash -977173017, now seen corresponding path program 60 times [2022-03-19 07:49:54,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:54,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1618420486] [2022-03-19 07:49:54,808 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:49:54,808 INFO L85 PathProgramCache]: Analyzing trace with hash 337759822, now seen corresponding path program 1 times [2022-03-19 07:49:54,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:54,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242385404] [2022-03-19 07:49:54,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:54,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:54,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:54,835 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 07:49:54,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:54,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242385404] [2022-03-19 07:49:54,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242385404] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:54,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:54,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:49:56,478 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:56,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1618420486] [2022-03-19 07:49:56,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1618420486] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:56,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:56,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-19 07:49:56,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217985756] [2022-03-19 07:49:56,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:56,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-19 07:49:56,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:56,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-19 07:49:56,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2022-03-19 07:49:56,480 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 66 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 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 07:50:02,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:50:02,349 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2022-03-19 07:50:02,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-19 07:50:02,350 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 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 73 [2022-03-19 07:50:02,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:50:02,350 INFO L225 Difference]: With dead ends: 88 [2022-03-19 07:50:02,350 INFO L226 Difference]: Without dead ends: 78 [2022-03-19 07:50:02,351 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=378, Invalid=15878, Unknown=0, NotChecked=0, Total=16256 [2022-03-19 07:50:02,351 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 4602 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 4665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 4602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:50:02,351 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 332 Invalid, 4665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 4602 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-03-19 07:50:02,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-19 07:50:02,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-03-19 07:50:02,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:50:02,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-03-19 07:50:02,355 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 73 [2022-03-19 07:50:02,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:50:02,355 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-03-19 07:50:02,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 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 07:50:02,355 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-03-19 07:50:02,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-19 07:50:02,355 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:50:02,355 INFO L500 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:50:02,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-03-19 07:50:02,355 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:02,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:02,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1948471373, now seen corresponding path program 61 times [2022-03-19 07:50:02,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:02,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1483173147] [2022-03-19 07:50:02,494 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:50:02,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1303420558, now seen corresponding path program 1 times [2022-03-19 07:50:02,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:02,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497728679] [2022-03-19 07:50:02,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:02,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:02,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:02,533 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 07:50:02,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:02,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497728679] [2022-03-19 07:50:02,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497728679] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:02,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:02,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:50:04,236 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:50:04,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1483173147] [2022-03-19 07:50:04,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1483173147] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:04,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:04,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-19 07:50:04,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454236900] [2022-03-19 07:50:04,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:50:04,237 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-19 07:50:04,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:04,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-19 07:50:04,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 07:50:04,237 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 67 states, 67 states have (on average 1.044776119402985) internal successors, (70), 66 states have internal predecessors, (70), 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 07:50:10,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:50:10,598 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2022-03-19 07:50:10,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-19 07:50:10,598 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.044776119402985) internal successors, (70), 66 states have internal predecessors, (70), 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 74 [2022-03-19 07:50:10,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:50:10,599 INFO L225 Difference]: With dead ends: 89 [2022-03-19 07:50:10,599 INFO L226 Difference]: Without dead ends: 79 [2022-03-19 07:50:10,600 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=384, Invalid=16386, Unknown=0, NotChecked=0, Total=16770 [2022-03-19 07:50:10,600 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 4739 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 4803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 4739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:50:10,600 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 337 Invalid, 4803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 4739 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-03-19 07:50:10,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-19 07:50:10,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-19 07:50:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:50:10,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-03-19 07:50:10,604 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2022-03-19 07:50:10,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:50:10,604 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-03-19 07:50:10,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.044776119402985) internal successors, (70), 66 states have internal predecessors, (70), 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 07:50:10,604 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-03-19 07:50:10,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 07:50:10,605 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:50:10,605 INFO L500 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:50:10,605 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-03-19 07:50:10,605 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:10,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:10,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1845833049, now seen corresponding path program 62 times [2022-03-19 07:50:10,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:10,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [442016765] [2022-03-19 07:50:10,738 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:50:10,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2025886002, now seen corresponding path program 1 times [2022-03-19 07:50:10,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:10,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087591896] [2022-03-19 07:50:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:10,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:10,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:10,769 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 07:50:10,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:10,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087591896] [2022-03-19 07:50:10,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087591896] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:10,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:10,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:50:12,509 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:50:12,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [442016765] [2022-03-19 07:50:12,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [442016765] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:12,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:12,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-19 07:50:12,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589080009] [2022-03-19 07:50:12,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:50:12,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-19 07:50:12,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:12,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-19 07:50:12,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2022-03-19 07:50:12,511 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 68 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 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 07:50:18,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:50:18,960 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2022-03-19 07:50:18,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-19 07:50:18,961 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 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 75 [2022-03-19 07:50:18,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:50:18,962 INFO L225 Difference]: With dead ends: 90 [2022-03-19 07:50:18,962 INFO L226 Difference]: Without dead ends: 80 [2022-03-19 07:50:18,963 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=390, Invalid=16902, Unknown=0, NotChecked=0, Total=17292 [2022-03-19 07:50:18,963 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 4878 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 4943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 4878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-03-19 07:50:18,963 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 342 Invalid, 4943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 4878 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-03-19 07:50:18,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-19 07:50:18,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-03-19 07:50:18,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:50:18,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2022-03-19 07:50:18,968 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 75 [2022-03-19 07:50:18,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:50:18,968 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2022-03-19 07:50:18,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 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 07:50:18,969 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2022-03-19 07:50:18,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-19 07:50:18,969 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:50:18,969 INFO L500 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:50:18,969 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-03-19 07:50:18,969 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:18,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:18,969 INFO L85 PathProgramCache]: Analyzing trace with hash 789814157, now seen corresponding path program 63 times [2022-03-19 07:50:18,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:18,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1918960252] [2022-03-19 07:50:19,108 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:50:19,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1060225266, now seen corresponding path program 1 times [2022-03-19 07:50:19,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:19,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73536601] [2022-03-19 07:50:19,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:19,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:19,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:19,150 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 07:50:19,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:19,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73536601] [2022-03-19 07:50:19,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73536601] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:19,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:19,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:50:21,008 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:50:21,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1918960252] [2022-03-19 07:50:21,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1918960252] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:21,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:21,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-19 07:50:21,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075133638] [2022-03-19 07:50:21,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:50:21,008 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-19 07:50:21,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:21,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-19 07:50:21,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2022-03-19 07:50:21,009 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 69 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 68 states have internal predecessors, (72), 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 07:50:27,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:50:27,468 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2022-03-19 07:50:27,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-19 07:50:27,470 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 68 states have internal predecessors, (72), 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 76 [2022-03-19 07:50:27,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:50:27,471 INFO L225 Difference]: With dead ends: 91 [2022-03-19 07:50:27,471 INFO L226 Difference]: Without dead ends: 81 [2022-03-19 07:50:27,472 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=396, Invalid=17426, Unknown=0, NotChecked=0, Total=17822 [2022-03-19 07:50:27,472 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 5019 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 5085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 5019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:50:27,477 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 347 Invalid, 5085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 5019 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-03-19 07:50:27,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-19 07:50:27,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-03-19 07:50:27,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:50:27,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-03-19 07:50:27,484 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2022-03-19 07:50:27,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:50:27,484 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-03-19 07:50:27,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 68 states have internal predecessors, (72), 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 07:50:27,484 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-03-19 07:50:27,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-19 07:50:27,485 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:50:27,485 INFO L500 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:50:27,485 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-03-19 07:50:27,485 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:27,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:27,485 INFO L85 PathProgramCache]: Analyzing trace with hash 890498919, now seen corresponding path program 64 times [2022-03-19 07:50:27,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:27,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [43654894] [2022-03-19 07:50:27,583 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:50:27,583 INFO L85 PathProgramCache]: Analyzing trace with hash -94564530, now seen corresponding path program 1 times [2022-03-19 07:50:27,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:27,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331588633] [2022-03-19 07:50:27,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:27,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:27,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:27,611 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 07:50:27,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:27,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331588633] [2022-03-19 07:50:27,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331588633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:27,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:27,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:50:29,381 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:50:29,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [43654894] [2022-03-19 07:50:29,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [43654894] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:29,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:29,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-19 07:50:29,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243577931] [2022-03-19 07:50:29,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:50:29,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-19 07:50:29,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:29,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-19 07:50:29,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2022-03-19 07:50:29,382 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 70 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 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 07:50:36,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:50:36,555 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2022-03-19 07:50:36,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-19 07:50:36,555 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 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 77 [2022-03-19 07:50:36,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:50:36,556 INFO L225 Difference]: With dead ends: 92 [2022-03-19 07:50:36,556 INFO L226 Difference]: Without dead ends: 82 [2022-03-19 07:50:36,557 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=402, Invalid=17958, Unknown=0, NotChecked=0, Total=18360 [2022-03-19 07:50:36,557 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 5162 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 5229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 5162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:50:36,557 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 352 Invalid, 5229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 5162 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-03-19 07:50:36,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-19 07:50:36,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-03-19 07:50:36,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:50:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-03-19 07:50:36,561 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2022-03-19 07:50:36,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:50:36,561 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-03-19 07:50:36,561 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 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 07:50:36,561 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-03-19 07:50:36,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-19 07:50:36,561 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:50:36,561 INFO L500 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:50:36,562 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-03-19 07:50:36,562 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:36,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:36,562 INFO L85 PathProgramCache]: Analyzing trace with hash -283240755, now seen corresponding path program 65 times [2022-03-19 07:50:36,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:36,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [435341030] [2022-03-19 07:50:36,670 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:50:36,671 INFO L85 PathProgramCache]: Analyzing trace with hash 871096206, now seen corresponding path program 1 times [2022-03-19 07:50:36,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:36,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598849444] [2022-03-19 07:50:36,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:36,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:36,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:36,699 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 07:50:36,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:36,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598849444] [2022-03-19 07:50:36,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598849444] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:36,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:36,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:50:38,608 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:50:38,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [435341030] [2022-03-19 07:50:38,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [435341030] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:38,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:38,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-19 07:50:38,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594429395] [2022-03-19 07:50:38,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:50:38,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-19 07:50:38,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:38,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-19 07:50:38,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2022-03-19 07:50:38,610 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 71 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 70 states have internal predecessors, (74), 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 07:50:46,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:50:46,172 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2022-03-19 07:50:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-19 07:50:46,173 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 70 states have internal predecessors, (74), 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 78 [2022-03-19 07:50:46,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:50:46,173 INFO L225 Difference]: With dead ends: 93 [2022-03-19 07:50:46,173 INFO L226 Difference]: Without dead ends: 83 [2022-03-19 07:50:46,175 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=408, Invalid=18498, Unknown=0, NotChecked=0, Total=18906 [2022-03-19 07:50:46,175 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 5307 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 5375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 5307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:50:46,175 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 357 Invalid, 5375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 5307 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-03-19 07:50:46,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-19 07:50:46,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-19 07:50:46,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:50:46,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2022-03-19 07:50:46,179 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 78 [2022-03-19 07:50:46,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:50:46,179 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2022-03-19 07:50:46,179 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 70 states have internal predecessors, (74), 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 07:50:46,179 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2022-03-19 07:50:46,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 07:50:46,180 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:50:46,180 INFO L500 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:50:46,180 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-03-19 07:50:46,180 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:46,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:46,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1985535015, now seen corresponding path program 66 times [2022-03-19 07:50:46,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:46,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1568646904] [2022-03-19 07:50:46,345 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:50:46,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1836756942, now seen corresponding path program 1 times [2022-03-19 07:50:46,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:46,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438700310] [2022-03-19 07:50:46,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:46,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:46,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:46,384 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 07:50:46,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:46,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438700310] [2022-03-19 07:50:46,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438700310] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:46,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:46,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:50:48,349 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:50:48,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1568646904] [2022-03-19 07:50:48,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1568646904] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:48,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:48,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-19 07:50:48,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704794601] [2022-03-19 07:50:48,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:50:48,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-19 07:50:48,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:48,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-19 07:50:48,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5111, Unknown=0, NotChecked=0, Total=5256 [2022-03-19 07:50:48,351 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 72 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 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 07:50:57,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:50:57,265 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2022-03-19 07:50:57,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-19 07:50:57,266 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 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 79 [2022-03-19 07:50:57,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:50:57,266 INFO L225 Difference]: With dead ends: 94 [2022-03-19 07:50:57,266 INFO L226 Difference]: Without dead ends: 84 [2022-03-19 07:50:57,268 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=414, Invalid=19046, Unknown=0, NotChecked=0, Total=19460 [2022-03-19 07:50:57,268 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 5454 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 5523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 5454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-03-19 07:50:57,268 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 362 Invalid, 5523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 5454 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-03-19 07:50:57,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-19 07:50:57,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-03-19 07:50:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:50:57,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2022-03-19 07:50:57,272 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 79 [2022-03-19 07:50:57,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:50:57,272 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2022-03-19 07:50:57,272 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 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 07:50:57,272 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2022-03-19 07:50:57,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-19 07:50:57,273 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:50:57,273 INFO L500 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:50:57,273 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-03-19 07:50:57,273 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:57,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:57,273 INFO L85 PathProgramCache]: Analyzing trace with hash -696860147, now seen corresponding path program 67 times [2022-03-19 07:50:57,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:57,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [44460313] [2022-03-19 07:50:57,413 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:50:57,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1492549618, now seen corresponding path program 1 times [2022-03-19 07:50:57,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:57,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164981438] [2022-03-19 07:50:57,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:57,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:57,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:57,452 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 07:50:57,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:57,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164981438] [2022-03-19 07:50:57,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164981438] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:57,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:57,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:50:59,388 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:50:59,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [44460313] [2022-03-19 07:50:59,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [44460313] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:59,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:59,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-19 07:50:59,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751901565] [2022-03-19 07:50:59,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:50:59,389 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-19 07:50:59,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:59,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-19 07:50:59,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5255, Unknown=0, NotChecked=0, Total=5402 [2022-03-19 07:50:59,390 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 73 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 states have internal predecessors, (76), 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 07:51:07,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:51:07,986 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2022-03-19 07:51:07,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-19 07:51:07,987 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 states have internal predecessors, (76), 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 80 [2022-03-19 07:51:07,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:51:07,988 INFO L225 Difference]: With dead ends: 95 [2022-03-19 07:51:07,988 INFO L226 Difference]: Without dead ends: 85 [2022-03-19 07:51:07,989 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=420, Invalid=19602, Unknown=0, NotChecked=0, Total=20022 [2022-03-19 07:51:07,990 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 5603 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 5673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 5603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:51:07,990 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 367 Invalid, 5673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 5603 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-03-19 07:51:07,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-19 07:51:07,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-03-19 07:51:07,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:51:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-03-19 07:51:07,999 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 80 [2022-03-19 07:51:08,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:51:08,002 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-03-19 07:51:08,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 states have internal predecessors, (76), 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 07:51:08,002 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-03-19 07:51:08,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-19 07:51:08,002 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:51:08,002 INFO L500 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:51:08,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-03-19 07:51:08,003 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:51:08,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:51:08,003 INFO L85 PathProgramCache]: Analyzing trace with hash 2048235751, now seen corresponding path program 68 times [2022-03-19 07:51:08,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:08,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1194928482] [2022-03-19 07:51:08,143 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:51:08,144 INFO L85 PathProgramCache]: Analyzing trace with hash -526888882, now seen corresponding path program 1 times [2022-03-19 07:51:08,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:51:08,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44810592] [2022-03-19 07:51:08,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:51:08,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:51:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:08,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:51:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:08,176 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 07:51:08,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:51:08,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44810592] [2022-03-19 07:51:08,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44810592] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:51:08,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:51:08,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:51:10,205 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:51:10,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1194928482] [2022-03-19 07:51:10,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1194928482] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:51:10,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:51:10,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-19 07:51:10,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953967407] [2022-03-19 07:51:10,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:51:10,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-19 07:51:10,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:10,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-19 07:51:10,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5401, Unknown=0, NotChecked=0, Total=5550 [2022-03-19 07:51:10,206 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 74 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 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 07:51:20,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:51:20,735 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2022-03-19 07:51:20,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-19 07:51:20,736 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 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 81 [2022-03-19 07:51:20,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:51:20,737 INFO L225 Difference]: With dead ends: 96 [2022-03-19 07:51:20,737 INFO L226 Difference]: Without dead ends: 86 [2022-03-19 07:51:20,737 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=426, Invalid=20166, Unknown=0, NotChecked=0, Total=20592 [2022-03-19 07:51:20,738 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 5754 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 5825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 5754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:51:20,738 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 372 Invalid, 5825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 5754 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-03-19 07:51:20,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-19 07:51:20,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-03-19 07:51:20,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:51:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-03-19 07:51:20,741 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 81 [2022-03-19 07:51:20,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:51:20,741 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-03-19 07:51:20,742 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 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 07:51:20,742 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-03-19 07:51:20,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-19 07:51:20,742 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:51:20,742 INFO L500 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:51:20,742 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-03-19 07:51:20,742 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:51:20,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:51:20,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1246862669, now seen corresponding path program 69 times [2022-03-19 07:51:20,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:20,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1456479069] [2022-03-19 07:51:20,841 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:51:20,842 INFO L85 PathProgramCache]: Analyzing trace with hash 438771854, now seen corresponding path program 1 times [2022-03-19 07:51:20,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:51:20,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298083547] [2022-03-19 07:51:20,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:51:20,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:51:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:20,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:51:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:20,869 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 07:51:20,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:51:20,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298083547] [2022-03-19 07:51:20,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298083547] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:51:20,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:51:20,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:51:22,937 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:51:22,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1456479069] [2022-03-19 07:51:22,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1456479069] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:51:22,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:51:22,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-19 07:51:22,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161977670] [2022-03-19 07:51:22,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:51:22,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-19 07:51:22,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:22,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-19 07:51:22,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5549, Unknown=0, NotChecked=0, Total=5700 [2022-03-19 07:51:22,938 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 75 states, 75 states have (on average 1.04) internal successors, (78), 74 states have internal predecessors, (78), 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 07:51:33,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:51:33,676 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2022-03-19 07:51:33,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-19 07:51:33,678 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.04) internal successors, (78), 74 states have internal predecessors, (78), 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 82 [2022-03-19 07:51:33,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:51:33,679 INFO L225 Difference]: With dead ends: 97 [2022-03-19 07:51:33,679 INFO L226 Difference]: Without dead ends: 87 [2022-03-19 07:51:33,680 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=432, Invalid=20738, Unknown=0, NotChecked=0, Total=21170 [2022-03-19 07:51:33,680 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 5907 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 5979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 5907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:51:33,680 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 377 Invalid, 5979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 5907 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-03-19 07:51:33,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-19 07:51:33,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-03-19 07:51:33,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:51:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-03-19 07:51:33,684 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 82 [2022-03-19 07:51:33,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:51:33,684 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-03-19 07:51:33,684 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.04) internal successors, (78), 74 states have internal predecessors, (78), 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 07:51:33,684 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-03-19 07:51:33,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-19 07:51:33,685 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:51:33,685 INFO L500 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:51:33,685 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-03-19 07:51:33,685 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:51:33,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:51:33,685 INFO L85 PathProgramCache]: Analyzing trace with hash -2120866393, now seen corresponding path program 70 times [2022-03-19 07:51:33,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:33,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [155041726] [2022-03-19 07:51:33,790 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:51:33,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1404432590, now seen corresponding path program 1 times [2022-03-19 07:51:33,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:51:33,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603654415] [2022-03-19 07:51:33,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:51:33,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:51:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:33,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:51:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:33,820 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 07:51:33,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:51:33,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603654415] [2022-03-19 07:51:33,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603654415] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:51:33,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:51:33,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:51:36,002 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:51:36,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [155041726] [2022-03-19 07:51:36,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [155041726] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:51:36,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:51:36,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-19 07:51:36,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673356481] [2022-03-19 07:51:36,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:51:36,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-19 07:51:36,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:36,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-19 07:51:36,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5699, Unknown=0, NotChecked=0, Total=5852 [2022-03-19 07:51:36,004 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 76 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 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 07:51:49,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:51:49,401 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2022-03-19 07:51:49,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-19 07:51:49,401 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 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 83 [2022-03-19 07:51:49,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:51:49,402 INFO L225 Difference]: With dead ends: 98 [2022-03-19 07:51:49,402 INFO L226 Difference]: Without dead ends: 88 [2022-03-19 07:51:49,403 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=438, Invalid=21318, Unknown=0, NotChecked=0, Total=21756 [2022-03-19 07:51:49,403 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 6062 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 6135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 6062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:51:49,403 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 382 Invalid, 6135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 6062 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2022-03-19 07:51:49,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-19 07:51:49,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-19 07:51:49,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:51:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-03-19 07:51:49,407 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2022-03-19 07:51:49,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:51:49,407 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-03-19 07:51:49,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 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 07:51:49,408 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-03-19 07:51:49,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-19 07:51:49,408 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:51:49,408 INFO L500 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:51:49,408 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-03-19 07:51:49,408 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:51:49,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:51:49,408 INFO L85 PathProgramCache]: Analyzing trace with hash 853715085, now seen corresponding path program 71 times [2022-03-19 07:51:49,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:49,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2120898539] [2022-03-19 07:51:49,508 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:51:49,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1924873970, now seen corresponding path program 1 times [2022-03-19 07:51:49,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:51:49,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918390493] [2022-03-19 07:51:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:51:49,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:51:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:49,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:51:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:49,547 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 07:51:49,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:51:49,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918390493] [2022-03-19 07:51:49,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918390493] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:51:49,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:51:49,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:51:51,824 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:51:51,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2120898539] [2022-03-19 07:51:51,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2120898539] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:51:51,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:51:51,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-19 07:51:51,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529424676] [2022-03-19 07:51:51,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:51:51,825 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-19 07:51:51,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:51,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-19 07:51:51,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=5851, Unknown=0, NotChecked=0, Total=6006 [2022-03-19 07:51:51,826 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 77 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 76 states have internal predecessors, (80), 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 07:52:06,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:52:06,742 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2022-03-19 07:52:06,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-19 07:52:06,744 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 76 states have internal predecessors, (80), 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 84 [2022-03-19 07:52:06,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:52:06,752 INFO L225 Difference]: With dead ends: 99 [2022-03-19 07:52:06,752 INFO L226 Difference]: Without dead ends: 89 [2022-03-19 07:52:06,753 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=444, Invalid=21906, Unknown=0, NotChecked=0, Total=22350 [2022-03-19 07:52:06,753 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 6219 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 6293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 6219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:52:06,754 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 387 Invalid, 6293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 6219 Invalid, 0 Unknown, 0 Unchecked, 12.5s Time] [2022-03-19 07:52:06,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-19 07:52:06,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-03-19 07:52:06,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:52:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-03-19 07:52:06,758 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2022-03-19 07:52:06,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:52:06,758 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-03-19 07:52:06,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 76 states have internal predecessors, (80), 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 07:52:06,758 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-03-19 07:52:06,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-19 07:52:06,758 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:52:06,758 INFO L500 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:52:06,758 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-03-19 07:52:06,758 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:52:06,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:52:06,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1423539609, now seen corresponding path program 72 times [2022-03-19 07:52:06,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:06,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1139722672] [2022-03-19 07:52:06,908 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:52:06,909 INFO L85 PathProgramCache]: Analyzing trace with hash -959213234, now seen corresponding path program 1 times [2022-03-19 07:52:06,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:52:06,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298507848] [2022-03-19 07:52:06,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:52:06,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:52:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:06,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:52:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:06,937 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 07:52:06,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:52:06,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298507848] [2022-03-19 07:52:06,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298507848] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:52:06,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:52:06,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:52:09,232 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:52:09,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1139722672] [2022-03-19 07:52:09,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1139722672] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:52:09,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:52:09,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-19 07:52:09,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136378010] [2022-03-19 07:52:09,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:52:09,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-19 07:52:09,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:09,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-19 07:52:09,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6005, Unknown=0, NotChecked=0, Total=6162 [2022-03-19 07:52:09,234 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 78 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 77 states have internal predecessors, (81), 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 07:52:24,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:52:24,478 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2022-03-19 07:52:24,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-19 07:52:24,478 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 77 states have internal predecessors, (81), 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 85 [2022-03-19 07:52:24,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:52:24,479 INFO L225 Difference]: With dead ends: 100 [2022-03-19 07:52:24,479 INFO L226 Difference]: Without dead ends: 90 [2022-03-19 07:52:24,480 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=450, Invalid=22502, Unknown=0, NotChecked=0, Total=22952 [2022-03-19 07:52:24,480 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 6378 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 6453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 6378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2022-03-19 07:52:24,480 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 392 Invalid, 6453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 6378 Invalid, 0 Unknown, 0 Unchecked, 12.9s Time] [2022-03-19 07:52:24,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-19 07:52:24,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-03-19 07:52:24,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:52:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2022-03-19 07:52:24,484 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 85 [2022-03-19 07:52:24,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:52:24,484 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2022-03-19 07:52:24,485 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 77 states have internal predecessors, (81), 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 07:52:24,485 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2022-03-19 07:52:24,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-19 07:52:24,485 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:52:24,485 INFO L500 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:52:24,485 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-03-19 07:52:24,485 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:52:24,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:52:24,485 INFO L85 PathProgramCache]: Analyzing trace with hash 996008909, now seen corresponding path program 73 times [2022-03-19 07:52:24,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:24,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1457809294] [2022-03-19 07:52:24,621 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:52:24,622 INFO L85 PathProgramCache]: Analyzing trace with hash 6447502, now seen corresponding path program 1 times [2022-03-19 07:52:24,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:52:24,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493837732] [2022-03-19 07:52:24,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:52:24,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:52:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:24,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:52:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:24,655 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 07:52:24,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:52:24,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493837732] [2022-03-19 07:52:24,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493837732] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:52:24,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:52:24,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:52:26,904 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:52:26,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1457809294] [2022-03-19 07:52:26,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1457809294] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:52:26,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:52:26,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-19 07:52:26,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900558288] [2022-03-19 07:52:26,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:52:26,905 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-19 07:52:26,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:26,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-19 07:52:26,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6161, Unknown=0, NotChecked=0, Total=6320 [2022-03-19 07:52:26,906 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 79 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 78 states have internal predecessors, (82), 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 07:52:43,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:52:43,797 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2022-03-19 07:52:43,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-19 07:52:43,798 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 78 states have internal predecessors, (82), 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 86 [2022-03-19 07:52:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:52:43,798 INFO L225 Difference]: With dead ends: 101 [2022-03-19 07:52:43,798 INFO L226 Difference]: Without dead ends: 91 [2022-03-19 07:52:43,799 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=456, Invalid=23106, Unknown=0, NotChecked=0, Total=23562 [2022-03-19 07:52:43,799 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 6539 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 6615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 6539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:52:43,799 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 397 Invalid, 6615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 6539 Invalid, 0 Unknown, 0 Unchecked, 14.3s Time] [2022-03-19 07:52:43,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-19 07:52:43,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-19 07:52:43,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:52:43,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-03-19 07:52:43,803 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86 [2022-03-19 07:52:43,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:52:43,803 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-03-19 07:52:43,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 78 states have internal predecessors, (82), 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 07:52:43,803 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-03-19 07:52:43,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-19 07:52:43,804 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:52:43,804 INFO L500 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:52:43,804 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-03-19 07:52:43,804 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:52:43,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:52:43,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1307398361, now seen corresponding path program 74 times [2022-03-19 07:52:43,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:43,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1983599255] [2022-03-19 07:52:43,942 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:52:43,943 INFO L85 PathProgramCache]: Analyzing trace with hash 972108238, now seen corresponding path program 1 times [2022-03-19 07:52:43,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:52:43,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295936374] [2022-03-19 07:52:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:52:43,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:52:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:43,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:52:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:43,979 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 07:52:43,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:52:43,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295936374] [2022-03-19 07:52:43,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295936374] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:52:43,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:52:43,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:52:46,360 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:52:46,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1983599255] [2022-03-19 07:52:46,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1983599255] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:52:46,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:52:46,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-19 07:52:46,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146857723] [2022-03-19 07:52:46,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:52:46,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-19 07:52:46,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:46,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-19 07:52:46,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6319, Unknown=0, NotChecked=0, Total=6480 [2022-03-19 07:52:46,361 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 80 states, 80 states have (on average 1.0375) internal successors, (83), 79 states have internal predecessors, (83), 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 07:53:09,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:53:09,708 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2022-03-19 07:53:09,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-19 07:53:09,709 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.0375) internal successors, (83), 79 states have internal predecessors, (83), 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 87 [2022-03-19 07:53:09,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:53:09,710 INFO L225 Difference]: With dead ends: 102 [2022-03-19 07:53:09,710 INFO L226 Difference]: Without dead ends: 92 [2022-03-19 07:53:09,711 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=462, Invalid=23718, Unknown=0, NotChecked=0, Total=24180 [2022-03-19 07:53:09,711 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 6702 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 6779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 6702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.8s IncrementalHoareTripleChecker+Time [2022-03-19 07:53:09,711 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 402 Invalid, 6779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 6702 Invalid, 0 Unknown, 0 Unchecked, 20.8s Time] [2022-03-19 07:53:09,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-19 07:53:09,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-03-19 07:53:09,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:53:09,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2022-03-19 07:53:09,715 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 87 [2022-03-19 07:53:09,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:53:09,715 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2022-03-19 07:53:09,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.0375) internal successors, (83), 79 states have internal predecessors, (83), 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 07:53:09,716 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2022-03-19 07:53:09,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-19 07:53:09,716 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:53:09,716 INFO L500 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:53:09,716 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-03-19 07:53:09,716 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:53:09,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:53:09,716 INFO L85 PathProgramCache]: Analyzing trace with hash 301420301, now seen corresponding path program 75 times [2022-03-19 07:53:09,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:53:09,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1092368278] [2022-03-19 07:53:09,825 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:53:09,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1937768974, now seen corresponding path program 1 times [2022-03-19 07:53:09,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:53:09,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36989437] [2022-03-19 07:53:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:53:09,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:53:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:53:09,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:53:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:53:09,854 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 07:53:09,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:53:09,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36989437] [2022-03-19 07:53:09,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36989437] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:53:09,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:53:09,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:53:12,250 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:53:12,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1092368278] [2022-03-19 07:53:12,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1092368278] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:53:12,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:53:12,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-19 07:53:12,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543149414] [2022-03-19 07:53:12,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:53:12,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-19 07:53:12,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:53:12,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-19 07:53:12,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6479, Unknown=0, NotChecked=0, Total=6642 [2022-03-19 07:53:12,251 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 81 states, 81 states have (on average 1.037037037037037) internal successors, (84), 80 states have internal predecessors, (84), 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 07:53:38,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:53:38,170 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2022-03-19 07:53:38,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-19 07:53:38,171 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.037037037037037) internal successors, (84), 80 states have internal predecessors, (84), 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 88 [2022-03-19 07:53:38,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:53:38,171 INFO L225 Difference]: With dead ends: 103 [2022-03-19 07:53:38,171 INFO L226 Difference]: Without dead ends: 93 [2022-03-19 07:53:38,172 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=468, Invalid=24338, Unknown=0, NotChecked=0, Total=24806 [2022-03-19 07:53:38,173 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 6867 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 6945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 6867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:53:38,173 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 407 Invalid, 6945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 6867 Invalid, 0 Unknown, 0 Unchecked, 23.1s Time] [2022-03-19 07:53:38,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-19 07:53:38,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-19 07:53:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:53:38,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-03-19 07:53:38,177 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 88 [2022-03-19 07:53:38,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:53:38,177 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-03-19 07:53:38,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.037037037037037) internal successors, (84), 80 states have internal predecessors, (84), 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 07:53:38,177 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-03-19 07:53:38,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-19 07:53:38,177 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:53:38,177 INFO L500 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:53:38,177 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-03-19 07:53:38,177 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:53:38,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:53:38,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1364808729, now seen corresponding path program 76 times [2022-03-19 07:53:38,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:53:38,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [535001670] [2022-03-19 07:53:38,283 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:53:38,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1391537586, now seen corresponding path program 1 times [2022-03-19 07:53:38,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:53:38,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700122965] [2022-03-19 07:53:38,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:53:38,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:53:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:53:38,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:53:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:53:38,326 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 07:53:38,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:53:38,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700122965] [2022-03-19 07:53:38,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700122965] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:53:38,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:53:38,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:53:40,759 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:53:40,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [535001670] [2022-03-19 07:53:40,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [535001670] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:53:40,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:53:40,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-19 07:53:40,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678526801] [2022-03-19 07:53:40,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:53:40,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-19 07:53:40,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:53:40,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-19 07:53:40,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6641, Unknown=0, NotChecked=0, Total=6806 [2022-03-19 07:53:40,761 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 82 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 81 states have internal predecessors, (85), 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 07:54:02,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:54:02,547 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2022-03-19 07:54:02,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-19 07:54:02,547 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 81 states have internal predecessors, (85), 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 89 [2022-03-19 07:54:02,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:54:02,548 INFO L225 Difference]: With dead ends: 104 [2022-03-19 07:54:02,548 INFO L226 Difference]: Without dead ends: 94 [2022-03-19 07:54:02,549 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=474, Invalid=24966, Unknown=0, NotChecked=0, Total=25440 [2022-03-19 07:54:02,549 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 7034 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 7113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 7034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:54:02,549 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 412 Invalid, 7113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 7034 Invalid, 0 Unknown, 0 Unchecked, 19.2s Time] [2022-03-19 07:54:02,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-19 07:54:02,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-03-19 07:54:02,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:54:02,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-03-19 07:54:02,554 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 89 [2022-03-19 07:54:02,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:54:02,554 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-03-19 07:54:02,554 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 81 states have internal predecessors, (85), 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 07:54:02,554 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-03-19 07:54:02,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-19 07:54:02,554 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:54:02,555 INFO L500 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:54:02,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-03-19 07:54:02,555 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:54:02,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:54:02,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1478301107, now seen corresponding path program 77 times [2022-03-19 07:54:02,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:54:02,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1354414196] [2022-03-19 07:54:02,750 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:54:02,751 INFO L85 PathProgramCache]: Analyzing trace with hash -425876850, now seen corresponding path program 1 times [2022-03-19 07:54:02,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:54:02,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743208664] [2022-03-19 07:54:02,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:54:02,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:54:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:54:02,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:54:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:54:02,788 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 07:54:02,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:54:02,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743208664] [2022-03-19 07:54:02,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743208664] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:54:02,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:54:02,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:54:05,240 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:54:05,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1354414196] [2022-03-19 07:54:05,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1354414196] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:54:05,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:54:05,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-19 07:54:05,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438899898] [2022-03-19 07:54:05,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:54:05,241 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-19 07:54:05,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:54:05,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-19 07:54:05,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6805, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 07:54:05,242 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 83 states, 83 states have (on average 1.036144578313253) internal successors, (86), 82 states have internal predecessors, (86), 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 07:54:30,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:54:30,586 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2022-03-19 07:54:30,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-19 07:54:30,587 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.036144578313253) internal successors, (86), 82 states have internal predecessors, (86), 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 90 [2022-03-19 07:54:30,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:54:30,587 INFO L225 Difference]: With dead ends: 105 [2022-03-19 07:54:30,587 INFO L226 Difference]: Without dead ends: 95 [2022-03-19 07:54:30,588 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=480, Invalid=25602, Unknown=0, NotChecked=0, Total=26082 [2022-03-19 07:54:30,588 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 7203 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 7283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 7203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:54:30,588 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 417 Invalid, 7283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 7203 Invalid, 0 Unknown, 0 Unchecked, 22.6s Time] [2022-03-19 07:54:30,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-19 07:54:30,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-03-19 07:54:30,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:54:30,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2022-03-19 07:54:30,602 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 90 [2022-03-19 07:54:30,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:54:30,602 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2022-03-19 07:54:30,602 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.036144578313253) internal successors, (86), 82 states have internal predecessors, (86), 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 07:54:30,602 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2022-03-19 07:54:30,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-19 07:54:30,602 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:54:30,602 INFO L500 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:54:30,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-03-19 07:54:30,603 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:54:30,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:54:30,603 INFO L85 PathProgramCache]: Analyzing trace with hash -701597529, now seen corresponding path program 78 times [2022-03-19 07:54:30,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:54:30,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1641221564] [2022-03-19 07:54:30,755 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:54:30,755 INFO L85 PathProgramCache]: Analyzing trace with hash 539783886, now seen corresponding path program 1 times [2022-03-19 07:54:30,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:54:30,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336994697] [2022-03-19 07:54:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:54:30,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:54:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:54:30,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:54:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:54:30,783 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 07:54:30,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:54:30,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336994697] [2022-03-19 07:54:30,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336994697] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:54:30,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:54:30,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:54:33,345 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:54:33,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1641221564] [2022-03-19 07:54:33,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1641221564] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:54:33,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:54:33,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-19 07:54:33,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434917743] [2022-03-19 07:54:33,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:54:33,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-19 07:54:33,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:54:33,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-19 07:54:33,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=6971, Unknown=0, NotChecked=0, Total=7140 [2022-03-19 07:54:33,347 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 84 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 83 states have internal predecessors, (87), 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 07:55:03,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:55:03,552 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2022-03-19 07:55:03,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-19 07:55:03,553 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 83 states have internal predecessors, (87), 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 91 [2022-03-19 07:55:03,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:55:03,554 INFO L225 Difference]: With dead ends: 106 [2022-03-19 07:55:03,554 INFO L226 Difference]: Without dead ends: 96 [2022-03-19 07:55:03,555 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=486, Invalid=26246, Unknown=0, NotChecked=0, Total=26732 [2022-03-19 07:55:03,555 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 7374 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 7455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 7374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:55:03,555 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 422 Invalid, 7455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 7374 Invalid, 0 Unknown, 0 Unchecked, 27.2s Time] [2022-03-19 07:55:03,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-19 07:55:03,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-03-19 07:55:03,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:55:03,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2022-03-19 07:55:03,559 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 91 [2022-03-19 07:55:03,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:55:03,559 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2022-03-19 07:55:03,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 83 states have internal predecessors, (87), 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 07:55:03,559 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2022-03-19 07:55:03,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-19 07:55:03,560 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:55:03,560 INFO L500 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:55:03,560 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-03-19 07:55:03,560 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:55:03,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:55:03,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1901376909, now seen corresponding path program 79 times [2022-03-19 07:55:03,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:55:03,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [645550800] [2022-03-19 07:55:03,698 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:55:03,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1505444622, now seen corresponding path program 1 times [2022-03-19 07:55:03,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:55:03,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594881367] [2022-03-19 07:55:03,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:55:03,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:55:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:55:03,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:55:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:55:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:55:03,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:55:03,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594881367] [2022-03-19 07:55:03,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594881367] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:55:03,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:55:03,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:55:06,370 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:55:06,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [645550800] [2022-03-19 07:55:06,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [645550800] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:55:06,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:55:06,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-19 07:55:06,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390715812] [2022-03-19 07:55:06,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:55:06,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-19 07:55:06,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:55:06,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-19 07:55:06,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7139, Unknown=0, NotChecked=0, Total=7310 [2022-03-19 07:55:06,372 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 85 states, 85 states have (on average 1.035294117647059) internal successors, (88), 84 states have internal predecessors, (88), 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 07:55:40,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:55:40,947 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2022-03-19 07:55:40,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-19 07:55:40,950 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.035294117647059) internal successors, (88), 84 states have internal predecessors, (88), 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 92 [2022-03-19 07:55:40,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:55:40,951 INFO L225 Difference]: With dead ends: 107 [2022-03-19 07:55:40,951 INFO L226 Difference]: Without dead ends: 97 [2022-03-19 07:55:40,952 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=492, Invalid=26898, Unknown=0, NotChecked=0, Total=27390 [2022-03-19 07:55:40,952 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 7547 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 7629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 7547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:55:40,952 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 427 Invalid, 7629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 7547 Invalid, 0 Unknown, 0 Unchecked, 31.4s Time] [2022-03-19 07:55:40,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-19 07:55:40,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-03-19 07:55:40,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:55:40,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-03-19 07:55:40,957 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2022-03-19 07:55:40,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:55:40,957 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-03-19 07:55:40,957 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.035294117647059) internal successors, (88), 84 states have internal predecessors, (88), 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 07:55:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-03-19 07:55:40,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-19 07:55:40,957 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:55:40,957 INFO L500 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:55:40,957 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-03-19 07:55:40,957 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:55:40,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:55:40,958 INFO L85 PathProgramCache]: Analyzing trace with hash 989205863, now seen corresponding path program 80 times [2022-03-19 07:55:40,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:55:40,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1274834854] [2022-03-19 07:55:41,144 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:55:41,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1823861938, now seen corresponding path program 1 times [2022-03-19 07:55:41,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:55:41,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978577780] [2022-03-19 07:55:41,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:55:41,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:55:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:55:41,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:55:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:55:41,168 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 07:55:41,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:55:41,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978577780] [2022-03-19 07:55:41,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978577780] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:55:41,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:55:41,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:55:43,869 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:55:43,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1274834854] [2022-03-19 07:55:43,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1274834854] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:55:43,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:55:43,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-19 07:55:43,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127287780] [2022-03-19 07:55:43,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:55:43,869 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-19 07:55:43,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:55:43,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-19 07:55:43,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7309, Unknown=0, NotChecked=0, Total=7482 [2022-03-19 07:55:43,871 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 86 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 85 states have internal predecessors, (89), 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 07:56:28,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:56:28,335 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2022-03-19 07:56:28,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-19 07:56:28,335 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 85 states have internal predecessors, (89), 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 93 [2022-03-19 07:56:28,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:56:28,336 INFO L225 Difference]: With dead ends: 108 [2022-03-19 07:56:28,336 INFO L226 Difference]: Without dead ends: 98 [2022-03-19 07:56:28,337 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=498, Invalid=27558, Unknown=0, NotChecked=0, Total=28056 [2022-03-19 07:56:28,338 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 7722 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 7805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 7722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:56:28,338 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 432 Invalid, 7805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 7722 Invalid, 0 Unknown, 0 Unchecked, 41.2s Time] [2022-03-19 07:56:28,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-19 07:56:28,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-03-19 07:56:28,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:56:28,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2022-03-19 07:56:28,342 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 93 [2022-03-19 07:56:28,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:56:28,342 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2022-03-19 07:56:28,342 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 85 states have internal predecessors, (89), 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 07:56:28,342 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2022-03-19 07:56:28,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-19 07:56:28,342 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:56:28,343 INFO L500 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:56:28,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-03-19 07:56:28,343 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:56:28,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:56:28,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1518292787, now seen corresponding path program 81 times [2022-03-19 07:56:28,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:56:28,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [989169232] [2022-03-19 07:56:28,449 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:56:28,449 INFO L85 PathProgramCache]: Analyzing trace with hash -858201202, now seen corresponding path program 1 times [2022-03-19 07:56:28,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:56:28,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367938982] [2022-03-19 07:56:28,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:56:28,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:56:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:56:28,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:56:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:56:28,479 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 07:56:28,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:56:28,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367938982] [2022-03-19 07:56:28,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367938982] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:56:28,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:56:28,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:56:31,193 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:56:31,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [989169232] [2022-03-19 07:56:31,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [989169232] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:56:31,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:56:31,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-19 07:56:31,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872007032] [2022-03-19 07:56:31,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:56:31,193 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-19 07:56:31,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:56:31,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-19 07:56:31,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7481, Unknown=0, NotChecked=0, Total=7656 [2022-03-19 07:56:31,194 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 87 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 86 states have internal predecessors, (90), 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 07:57:08,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:57:08,738 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2022-03-19 07:57:08,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-19 07:57:08,739 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 86 states have internal predecessors, (90), 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 94 [2022-03-19 07:57:08,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:57:08,739 INFO L225 Difference]: With dead ends: 109 [2022-03-19 07:57:08,739 INFO L226 Difference]: Without dead ends: 99 [2022-03-19 07:57:08,741 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=504, Invalid=28226, Unknown=0, NotChecked=0, Total=28730 [2022-03-19 07:57:08,741 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 7899 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 7983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 7899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:57:08,741 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 437 Invalid, 7983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 7899 Invalid, 0 Unknown, 0 Unchecked, 34.6s Time] [2022-03-19 07:57:08,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-19 07:57:08,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-03-19 07:57:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:57:08,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-03-19 07:57:08,745 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2022-03-19 07:57:08,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:57:08,746 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-03-19 07:57:08,746 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 86 states have internal predecessors, (90), 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 07:57:08,746 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-03-19 07:57:08,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-19 07:57:08,746 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:57:08,746 INFO L500 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:57:08,746 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-03-19 07:57:08,746 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:57:08,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:57:08,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1941339609, now seen corresponding path program 82 times [2022-03-19 07:57:08,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:08,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [335388611] [2022-03-19 07:57:08,856 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:57:08,856 INFO L85 PathProgramCache]: Analyzing trace with hash 107459534, now seen corresponding path program 1 times [2022-03-19 07:57:08,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:57:08,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105524973] [2022-03-19 07:57:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:57:08,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:57:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:08,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:57:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:08,902 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 07:57:08,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:57:08,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105524973] [2022-03-19 07:57:08,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105524973] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:57:08,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:57:08,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:57:11,793 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:57:11,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [335388611] [2022-03-19 07:57:11,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [335388611] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:57:11,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:57:11,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-19 07:57:11,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787532834] [2022-03-19 07:57:11,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:57:11,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-19 07:57:11,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:11,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-19 07:57:11,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7655, Unknown=0, NotChecked=0, Total=7832 [2022-03-19 07:57:11,795 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 88 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 87 states have internal predecessors, (91), 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 07:58:17,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:58:17,910 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2022-03-19 07:58:17,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-19 07:58:17,911 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 87 states have internal predecessors, (91), 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 95 [2022-03-19 07:58:17,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:58:17,911 INFO L225 Difference]: With dead ends: 110 [2022-03-19 07:58:17,911 INFO L226 Difference]: Without dead ends: 100 [2022-03-19 07:58:17,912 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=510, Invalid=28902, Unknown=0, NotChecked=0, Total=29412 [2022-03-19 07:58:17,913 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 8078 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 8163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 8078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:58:17,913 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 442 Invalid, 8163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 8078 Invalid, 0 Unknown, 0 Unchecked, 62.5s Time] [2022-03-19 07:58:17,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-19 07:58:17,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-03-19 07:58:17,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:58:17,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2022-03-19 07:58:17,917 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2022-03-19 07:58:17,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:58:17,917 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2022-03-19 07:58:17,917 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 87 states have internal predecessors, (91), 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 07:58:17,917 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2022-03-19 07:58:17,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-19 07:58:17,918 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:58:17,918 INFO L500 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:58:17,918 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-03-19 07:58:17,918 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:58:17,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:58:17,918 INFO L85 PathProgramCache]: Analyzing trace with hash 2124078093, now seen corresponding path program 83 times [2022-03-19 07:58:17,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:58:17,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [637413152] [2022-03-19 07:58:18,064 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:58:18,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1073120270, now seen corresponding path program 1 times [2022-03-19 07:58:18,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:58:18,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32267934] [2022-03-19 07:58:18,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:58:18,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:58:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:58:18,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:58:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:58:18,107 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 07:58:18,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:58:18,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32267934] [2022-03-19 07:58:18,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32267934] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:58:18,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:58:18,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:58:21,119 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:58:21,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [637413152] [2022-03-19 07:58:21,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [637413152] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:58:21,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:58:21,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-19 07:58:21,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598637120] [2022-03-19 07:58:21,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:58:21,120 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-19 07:58:21,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:58:21,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-19 07:58:21,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=7831, Unknown=0, NotChecked=0, Total=8010 [2022-03-19 07:58:21,121 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 89 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 88 states have internal predecessors, (92), 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 07:59:37,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:59:37,727 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2022-03-19 07:59:37,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-19 07:59:37,728 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 88 states have internal predecessors, (92), 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 96 [2022-03-19 07:59:37,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:59:37,729 INFO L225 Difference]: With dead ends: 111 [2022-03-19 07:59:37,729 INFO L226 Difference]: Without dead ends: 101 [2022-03-19 07:59:37,730 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=516, Invalid=29586, Unknown=0, NotChecked=0, Total=30102 [2022-03-19 07:59:37,730 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 8259 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 8345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 8259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:59:37,731 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 447 Invalid, 8345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 8259 Invalid, 0 Unknown, 0 Unchecked, 73.3s Time] [2022-03-19 07:59:37,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-19 07:59:37,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-19 07:59:37,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:59:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-03-19 07:59:37,735 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 96 [2022-03-19 07:59:37,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:59:37,735 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-03-19 07:59:37,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 88 states have internal predecessors, (92), 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 07:59:37,735 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-03-19 07:59:37,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 07:59:37,736 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:59:37,736 INFO L500 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:59:37,736 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-03-19 07:59:37,736 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:59:37,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:59:37,736 INFO L85 PathProgramCache]: Analyzing trace with hash -696992025, now seen corresponding path program 84 times [2022-03-19 07:59:37,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:59:37,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1661767260] [2022-03-19 07:59:37,901 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:59:37,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2038781006, now seen corresponding path program 1 times [2022-03-19 07:59:37,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:59:37,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266289176] [2022-03-19 07:59:37,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:59:37,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:59:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:37,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:59:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:37,930 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 07:59:37,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:59:37,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266289176] [2022-03-19 07:59:37,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266289176] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:59:37,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:59:37,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:59:40,942 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:59:40,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1661767260] [2022-03-19 07:59:40,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1661767260] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:59:40,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:59:40,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-19 07:59:40,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151529498] [2022-03-19 07:59:40,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:59:40,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-19 07:59:40,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:59:40,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-19 07:59:40,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8009, Unknown=0, NotChecked=0, Total=8190 [2022-03-19 07:59:40,944 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 90 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 89 states have internal predecessors, (93), 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 08:01:03,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:01:03,993 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2022-03-19 08:01:03,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-19 08:01:03,994 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 89 states have internal predecessors, (93), 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 97 [2022-03-19 08:01:03,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:01:03,994 INFO L225 Difference]: With dead ends: 112 [2022-03-19 08:01:03,994 INFO L226 Difference]: Without dead ends: 102 [2022-03-19 08:01:03,995 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=522, Invalid=30278, Unknown=0, NotChecked=0, Total=30800 [2022-03-19 08:01:03,995 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 8442 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 8529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 8442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:01:03,996 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 452 Invalid, 8529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 8442 Invalid, 0 Unknown, 0 Unchecked, 79.1s Time] [2022-03-19 08:01:03,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-19 08:01:04,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-03-19 08:01:04,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 08:01:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2022-03-19 08:01:04,000 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 97 [2022-03-19 08:01:04,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:01:04,000 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2022-03-19 08:01:04,000 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 89 states have internal predecessors, (93), 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 08:01:04,000 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2022-03-19 08:01:04,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-19 08:01:04,001 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:01:04,001 INFO L500 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:01:04,001 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-03-19 08:01:04,001 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:01:04,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:01:04,001 INFO L85 PathProgramCache]: Analyzing trace with hash 2044147533, now seen corresponding path program 85 times [2022-03-19 08:01:04,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:01:04,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [453375138] [2022-03-19 08:01:04,175 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 08:01:04,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1290525554, now seen corresponding path program 1 times [2022-03-19 08:01:04,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:01:04,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569737066] [2022-03-19 08:01:04,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:01:04,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:01:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:01:04,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:01:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:01:04,200 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 08:01:04,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:01:04,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569737066] [2022-03-19 08:01:04,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569737066] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:01:04,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:01:04,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 08:01:07,393 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:01:07,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [453375138] [2022-03-19 08:01:07,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [453375138] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:01:07,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:01:07,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-19 08:01:07,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315910593] [2022-03-19 08:01:07,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:01:07,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-19 08:01:07,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:01:07,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-19 08:01:07,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=8189, Unknown=0, NotChecked=0, Total=8372 [2022-03-19 08:01:07,395 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 91 states, 91 states have (on average 1.032967032967033) internal successors, (94), 90 states have internal predecessors, (94), 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)