/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-zilu/benchmark37_conjunctive.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 19:15:44,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 19:15:44,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 19:15:44,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 19:15:44,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 19:15:44,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 19:15:44,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 19:15:44,979 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 19:15:44,990 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 19:15:44,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 19:15:44,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 19:15:44,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 19:15:44,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 19:15:44,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 19:15:44,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 19:15:44,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 19:15:44,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 19:15:44,993 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 19:15:44,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 19:15:44,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 19:15:44,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 19:15:44,994 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 19:15:44,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 19:15:44,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:15:44,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 19:15:44,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 19:15:44,994 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 19:15:44,994 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 19:15:44,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 19:15:44,994 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 19:15:44,994 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 19:15:45,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 19:15:45,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 19:15:45,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 19:15:45,200 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 19:15:45,201 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 19:15:45,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark37_conjunctive.i [2022-03-20 19:15:45,242 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1918dbef6/c0c6ac5618d8464fa760a8fdd75a871b/FLAGe507e3a3b [2022-03-20 19:15:45,600 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 19:15:45,600 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark37_conjunctive.i [2022-03-20 19:15:45,604 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1918dbef6/c0c6ac5618d8464fa760a8fdd75a871b/FLAGe507e3a3b [2022-03-20 19:15:46,031 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1918dbef6/c0c6ac5618d8464fa760a8fdd75a871b [2022-03-20 19:15:46,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 19:15:46,034 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 19:15:46,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 19:15:46,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 19:15:46,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 19:15:46,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:15:46" (1/1) ... [2022-03-20 19:15:46,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5999d318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:15:46, skipping insertion in model container [2022-03-20 19:15:46,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:15:46" (1/1) ... [2022-03-20 19:15:46,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 19:15:46,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 19:15:46,173 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-zilu/benchmark37_conjunctive.i[873,886] [2022-03-20 19:15:46,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:15:46,197 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 19:15:46,209 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-zilu/benchmark37_conjunctive.i[873,886] [2022-03-20 19:15:46,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:15:46,224 INFO L208 MainTranslator]: Completed translation [2022-03-20 19:15:46,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:15:46 WrapperNode [2022-03-20 19:15:46,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 19:15:46,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 19:15:46,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 19:15:46,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 19:15:46,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:15:46" (1/1) ... [2022-03-20 19:15:46,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:15:46" (1/1) ... [2022-03-20 19:15:46,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:15:46" (1/1) ... [2022-03-20 19:15:46,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:15:46" (1/1) ... [2022-03-20 19:15:46,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:15:46" (1/1) ... [2022-03-20 19:15:46,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:15:46" (1/1) ... [2022-03-20 19:15:46,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:15:46" (1/1) ... [2022-03-20 19:15:46,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 19:15:46,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 19:15:46,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 19:15:46,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 19:15:46,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:15:46" (1/1) ... [2022-03-20 19:15:46,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:15:46,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:15:46,296 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) [2022-03-20 19:15:46,300 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 [2022-03-20 19:15:46,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 19:15:46,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 19:15:46,322 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 19:15:46,322 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 19:15:46,322 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 19:15:46,322 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 19:15:46,322 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 19:15:46,322 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 19:15:46,322 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 19:15:46,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 19:15:46,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 19:15:46,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-03-20 19:15:46,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 19:15:46,323 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 19:15:46,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 19:15:46,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 19:15:46,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 19:15:46,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 19:15:46,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 19:15:46,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 19:15:46,364 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 19:15:46,365 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 19:15:46,434 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 19:15:46,437 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 19:15:46,437 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 19:15:46,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:15:46 BoogieIcfgContainer [2022-03-20 19:15:46,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 19:15:46,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 19:15:46,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 19:15:46,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 19:15:46,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 07:15:46" (1/3) ... [2022-03-20 19:15:46,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a25837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:15:46, skipping insertion in model container [2022-03-20 19:15:46,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:15:46" (2/3) ... [2022-03-20 19:15:46,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a25837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:15:46, skipping insertion in model container [2022-03-20 19:15:46,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:15:46" (3/3) ... [2022-03-20 19:15:46,444 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark37_conjunctive.i [2022-03-20 19:15:46,447 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 19:15:46,447 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 19:15:46,473 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 19:15:46,477 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 [2022-03-20 19:15:46,477 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 19:15:46,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:15:46,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 19:15:46,501 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:46,501 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:46,502 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:46,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:46,505 INFO L85 PathProgramCache]: Analyzing trace with hash -304977768, now seen corresponding path program 1 times [2022-03-20 19:15:46,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:46,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [349687849] [2022-03-20 19:15:46,517 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:15:46,517 INFO L85 PathProgramCache]: Analyzing trace with hash -304977768, now seen corresponding path program 2 times [2022-03-20 19:15:46,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:46,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746332213] [2022-03-20 19:15:46,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:46,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:46,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:46,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:46,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746332213] [2022-03-20 19:15:46,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746332213] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:46,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:46,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:46,723 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:46,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [349687849] [2022-03-20 19:15:46,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [349687849] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:46,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:46,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:46,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185098811] [2022-03-20 19:15:46,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:46,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 19:15:46,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:46,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 19:15:46,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 19:15:46,744 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:46,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:46,835 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-03-20 19:15:46,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 19:15:46,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 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 12 [2022-03-20 19:15:46,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:46,840 INFO L225 Difference]: With dead ends: 41 [2022-03-20 19:15:46,841 INFO L226 Difference]: Without dead ends: 14 [2022-03-20 19:15:46,842 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 19:15:46,845 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:46,845 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 40 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:15:46,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-20 19:15:46,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-20 19:15:46,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:46,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-03-20 19:15:46,874 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-03-20 19:15:46,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:46,875 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-03-20 19:15:46,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:46,875 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-03-20 19:15:46,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 19:15:46,876 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:46,876 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:46,877 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 19:15:46,877 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:46,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:46,878 INFO L85 PathProgramCache]: Analyzing trace with hash -828987386, now seen corresponding path program 1 times [2022-03-20 19:15:46,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:46,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1372492278] [2022-03-20 19:15:49,296 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:15:49,297 INFO L85 PathProgramCache]: Analyzing trace with hash 28963623, now seen corresponding path program 1 times [2022-03-20 19:15:49,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:49,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675348388] [2022-03-20 19:15:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:49,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:49,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:49,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:49,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675348388] [2022-03-20 19:15:49,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675348388] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:49,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:49,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:49,370 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:49,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1372492278] [2022-03-20 19:15:49,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1372492278] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:49,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:49,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 19:15:49,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110796156] [2022-03-20 19:15:49,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:49,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 19:15:49,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:49,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 19:15:49,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 19:15:49,372 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) 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) [2022-03-20 19:15:49,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:49,426 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-03-20 19:15:49,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 19:15:49,426 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) 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 [2022-03-20 19:15:49,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:49,427 INFO L225 Difference]: With dead ends: 20 [2022-03-20 19:15:49,427 INFO L226 Difference]: Without dead ends: 15 [2022-03-20 19:15:49,427 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-20 19:15:49,428 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:49,429 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 32 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:15:49,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-20 19:15:49,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-20 19:15:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:49,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-03-20 19:15:49,432 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2022-03-20 19:15:49,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:49,432 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-03-20 19:15:49,433 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) 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) [2022-03-20 19:15:49,433 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-03-20 19:15:49,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 19:15:49,433 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:49,433 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:49,433 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 19:15:49,433 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:49,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:49,434 INFO L85 PathProgramCache]: Analyzing trace with hash 106583640, now seen corresponding path program 2 times [2022-03-20 19:15:49,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:49,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [527192566] [2022-03-20 19:15:49,661 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:15:49,662 INFO L85 PathProgramCache]: Analyzing trace with hash 88068967, now seen corresponding path program 1 times [2022-03-20 19:15:49,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:49,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345648104] [2022-03-20 19:15:49,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:49,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:49,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:49,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:49,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345648104] [2022-03-20 19:15:49,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345648104] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:49,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:49,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:49,731 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:49,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [527192566] [2022-03-20 19:15:49,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [527192566] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:49,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:49,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 19:15:49,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557879969] [2022-03-20 19:15:49,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:49,732 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 19:15:49,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:49,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 19:15:49,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 19:15:49,733 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:49,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:49,795 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-03-20 19:15:49,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 19:15:49,796 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-20 19:15:49,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:49,796 INFO L225 Difference]: With dead ends: 21 [2022-03-20 19:15:49,796 INFO L226 Difference]: Without dead ends: 16 [2022-03-20 19:15:49,797 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-20 19:15:49,797 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:49,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 32 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:15:49,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-20 19:15:49,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-03-20 19:15:49,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:49,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-03-20 19:15:49,801 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2022-03-20 19:15:49,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:49,801 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-03-20 19:15:49,801 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:49,801 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-03-20 19:15:49,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 19:15:49,802 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:49,802 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:49,802 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 19:15:49,802 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:49,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:49,803 INFO L85 PathProgramCache]: Analyzing trace with hash -955485626, now seen corresponding path program 3 times [2022-03-20 19:15:49,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:49,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2128376291] [2022-03-20 19:15:49,944 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:15:49,945 INFO L85 PathProgramCache]: Analyzing trace with hash 147174311, now seen corresponding path program 1 times [2022-03-20 19:15:49,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:49,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612678521] [2022-03-20 19:15:49,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:49,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:49,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:49,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:49,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612678521] [2022-03-20 19:15:49,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612678521] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:49,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:49,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:50,017 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:50,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2128376291] [2022-03-20 19:15:50,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2128376291] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:50,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:50,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 19:15:50,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312810936] [2022-03-20 19:15:50,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:50,018 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 19:15:50,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:50,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 19:15:50,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-20 19:15:50,019 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 9 states, 9 states have (on average 1.2222222222222223) 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) [2022-03-20 19:15:50,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:50,095 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-03-20 19:15:50,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 19:15:50,095 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.2222222222222223) 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 [2022-03-20 19:15:50,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:50,096 INFO L225 Difference]: With dead ends: 22 [2022-03-20 19:15:50,096 INFO L226 Difference]: Without dead ends: 17 [2022-03-20 19:15:50,096 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-03-20 19:15:50,097 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:50,097 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:15:50,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-20 19:15:50,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-20 19:15:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-03-20 19:15:50,100 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2022-03-20 19:15:50,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:50,100 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-03-20 19:15:50,100 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.2222222222222223) 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) [2022-03-20 19:15:50,100 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-03-20 19:15:50,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 19:15:50,101 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:50,101 INFO L499 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:50,101 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 19:15:50,101 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:50,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:50,101 INFO L85 PathProgramCache]: Analyzing trace with hash 480105496, now seen corresponding path program 4 times [2022-03-20 19:15:50,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:50,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1304091907] [2022-03-20 19:15:50,223 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:15:50,224 INFO L85 PathProgramCache]: Analyzing trace with hash 206279655, now seen corresponding path program 1 times [2022-03-20 19:15:50,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:50,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62123990] [2022-03-20 19:15:50,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:50,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:50,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:50,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:50,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62123990] [2022-03-20 19:15:50,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62123990] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:50,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:50,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:50,298 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:50,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1304091907] [2022-03-20 19:15:50,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1304091907] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:50,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:50,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 19:15:50,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374994694] [2022-03-20 19:15:50,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:50,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 19:15:50,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:50,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 19:15:50,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 19:15:50,300 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 10 states, 10 states have (on average 1.2) 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) [2022-03-20 19:15:50,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:50,383 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-03-20 19:15:50,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 19:15:50,383 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.2) 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 [2022-03-20 19:15:50,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:50,383 INFO L225 Difference]: With dead ends: 23 [2022-03-20 19:15:50,383 INFO L226 Difference]: Without dead ends: 18 [2022-03-20 19:15:50,384 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-03-20 19:15:50,384 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:50,384 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 32 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:15:50,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-20 19:15:50,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-20 19:15:50,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-03-20 19:15:50,387 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2022-03-20 19:15:50,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:50,387 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-03-20 19:15:50,387 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.2) 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) [2022-03-20 19:15:50,387 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-03-20 19:15:50,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 19:15:50,388 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:50,388 INFO L499 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:50,388 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 19:15:50,388 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:50,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:50,388 INFO L85 PathProgramCache]: Analyzing trace with hash 2033757318, now seen corresponding path program 5 times [2022-03-20 19:15:50,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:50,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [789162952] [2022-03-20 19:15:50,520 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:15:50,521 INFO L85 PathProgramCache]: Analyzing trace with hash 265384999, now seen corresponding path program 1 times [2022-03-20 19:15:50,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:50,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557174643] [2022-03-20 19:15:50,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:50,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:50,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:50,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:50,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557174643] [2022-03-20 19:15:50,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557174643] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:50,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:50,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:50,638 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:50,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [789162952] [2022-03-20 19:15:50,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [789162952] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:50,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:50,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 19:15:50,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252302914] [2022-03-20 19:15:50,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:50,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 19:15:50,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:50,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 19:15:50,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-20 19:15:50,639 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 11 states, 11 states have (on average 1.1818181818181819) 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) [2022-03-20 19:15:50,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:50,748 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-03-20 19:15:50,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 19:15:50,748 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.1818181818181819) 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 [2022-03-20 19:15:50,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:50,749 INFO L225 Difference]: With dead ends: 24 [2022-03-20 19:15:50,749 INFO L226 Difference]: Without dead ends: 19 [2022-03-20 19:15:50,749 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-03-20 19:15:50,749 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:50,750 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 32 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:15:50,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-20 19:15:50,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-20 19:15:50,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:50,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-03-20 19:15:50,752 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2022-03-20 19:15:50,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:50,752 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-03-20 19:15:50,752 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.1818181818181819) 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) [2022-03-20 19:15:50,753 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-03-20 19:15:50,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 19:15:50,753 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:50,753 INFO L499 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:50,753 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 19:15:50,753 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:50,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:50,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1342643752, now seen corresponding path program 6 times [2022-03-20 19:15:50,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:50,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [191509794] [2022-03-20 19:15:50,882 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:15:50,883 INFO L85 PathProgramCache]: Analyzing trace with hash 324490343, now seen corresponding path program 1 times [2022-03-20 19:15:50,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:50,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121082694] [2022-03-20 19:15:50,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:50,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:50,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:50,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:50,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:50,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121082694] [2022-03-20 19:15:50,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121082694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:50,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:50,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:50,999 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:50,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [191509794] [2022-03-20 19:15:50,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [191509794] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:50,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:50,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 19:15:50,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505637668] [2022-03-20 19:15:50,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:51,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 19:15:51,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:51,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 19:15:51,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 19:15:51,005 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 12 states, 12 states have (on average 1.1666666666666667) 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) [2022-03-20 19:15:51,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:51,116 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2022-03-20 19:15:51,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 19:15:51,116 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.1666666666666667) 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 [2022-03-20 19:15:51,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:51,116 INFO L225 Difference]: With dead ends: 25 [2022-03-20 19:15:51,116 INFO L226 Difference]: Without dead ends: 20 [2022-03-20 19:15:51,117 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-03-20 19:15:51,117 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:51,118 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:15:51,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-20 19:15:51,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-20 19:15:51,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:51,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-03-20 19:15:51,120 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2022-03-20 19:15:51,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:51,120 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-03-20 19:15:51,120 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.1666666666666667) 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) [2022-03-20 19:15:51,120 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-03-20 19:15:51,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 19:15:51,121 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:51,121 INFO L499 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:51,121 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 19:15:51,121 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:51,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:51,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1363105478, now seen corresponding path program 7 times [2022-03-20 19:15:51,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:51,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1936282661] [2022-03-20 19:15:51,249 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:15:51,249 INFO L85 PathProgramCache]: Analyzing trace with hash 383595687, now seen corresponding path program 1 times [2022-03-20 19:15:51,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:51,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908006414] [2022-03-20 19:15:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:51,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:51,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:51,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:51,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:51,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908006414] [2022-03-20 19:15:51,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908006414] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:51,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:51,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:51,382 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:51,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1936282661] [2022-03-20 19:15:51,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1936282661] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:51,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:51,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 19:15:51,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466686684] [2022-03-20 19:15:51,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:51,383 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 19:15:51,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:51,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 19:15:51,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-20 19:15:51,384 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 13 states, 13 states have (on average 1.1538461538461537) 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) [2022-03-20 19:15:51,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:51,507 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-03-20 19:15:51,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 19:15:51,507 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.1538461538461537) 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 [2022-03-20 19:15:51,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:51,508 INFO L225 Difference]: With dead ends: 26 [2022-03-20 19:15:51,508 INFO L226 Difference]: Without dead ends: 21 [2022-03-20 19:15:51,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2022-03-20 19:15:51,508 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:51,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:15:51,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-20 19:15:51,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-03-20 19:15:51,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:51,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-03-20 19:15:51,511 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2022-03-20 19:15:51,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:51,511 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-03-20 19:15:51,511 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.1538461538461537) 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) [2022-03-20 19:15:51,512 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-03-20 19:15:51,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 19:15:51,516 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:51,516 INFO L499 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:51,516 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 19:15:51,516 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:51,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:51,516 INFO L85 PathProgramCache]: Analyzing trace with hash -658014312, now seen corresponding path program 8 times [2022-03-20 19:15:51,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:51,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [9003000] [2022-03-20 19:15:51,622 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:15:51,622 INFO L85 PathProgramCache]: Analyzing trace with hash 442701031, now seen corresponding path program 1 times [2022-03-20 19:15:51,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:51,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994177722] [2022-03-20 19:15:51,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:51,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:51,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:51,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:51,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994177722] [2022-03-20 19:15:51,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994177722] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:51,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:51,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:51,752 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:51,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [9003000] [2022-03-20 19:15:51,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [9003000] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:51,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:51,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 19:15:51,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6878332] [2022-03-20 19:15:51,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:51,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 19:15:51,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:51,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 19:15:51,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-03-20 19:15:51,754 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 14 states, 14 states have (on average 1.1428571428571428) 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) [2022-03-20 19:15:51,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:51,880 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2022-03-20 19:15:51,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 19:15:51,881 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.1428571428571428) 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 [2022-03-20 19:15:51,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:51,881 INFO L225 Difference]: With dead ends: 27 [2022-03-20 19:15:51,881 INFO L226 Difference]: Without dead ends: 22 [2022-03-20 19:15:51,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2022-03-20 19:15:51,882 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:51,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:15:51,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-20 19:15:51,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-03-20 19:15:51,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:51,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2022-03-20 19:15:51,885 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2022-03-20 19:15:51,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:51,885 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2022-03-20 19:15:51,885 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.1428571428571428) 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) [2022-03-20 19:15:51,885 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2022-03-20 19:15:51,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 19:15:51,885 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:51,885 INFO L499 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:51,886 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 19:15:51,886 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:51,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:51,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1111781638, now seen corresponding path program 9 times [2022-03-20 19:15:51,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:51,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1411936121] [2022-03-20 19:15:51,969 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:15:51,970 INFO L85 PathProgramCache]: Analyzing trace with hash 501806375, now seen corresponding path program 1 times [2022-03-20 19:15:51,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:51,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796583100] [2022-03-20 19:15:51,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:51,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:52,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:52,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:52,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796583100] [2022-03-20 19:15:52,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796583100] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:52,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:52,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:52,134 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:52,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1411936121] [2022-03-20 19:15:52,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1411936121] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:52,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:52,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 19:15:52,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400509906] [2022-03-20 19:15:52,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:52,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 19:15:52,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:52,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 19:15:52,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-03-20 19:15:52,136 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 15 states, 15 states have (on average 1.1333333333333333) 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) [2022-03-20 19:15:52,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:52,292 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-03-20 19:15:52,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 19:15:52,293 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.1333333333333333) 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 [2022-03-20 19:15:52,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:52,293 INFO L225 Difference]: With dead ends: 28 [2022-03-20 19:15:52,293 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 19:15:52,293 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=499, Unknown=0, NotChecked=0, Total=702 [2022-03-20 19:15:52,294 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:52,295 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:15:52,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 19:15:52,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-20 19:15:52,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:52,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-03-20 19:15:52,301 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2022-03-20 19:15:52,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:52,302 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-03-20 19:15:52,302 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.1333333333333333) 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) [2022-03-20 19:15:52,302 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-03-20 19:15:52,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 19:15:52,303 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:52,303 INFO L499 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:52,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 19:15:52,303 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:52,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:52,303 INFO L85 PathProgramCache]: Analyzing trace with hash 140881240, now seen corresponding path program 10 times [2022-03-20 19:15:52,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:52,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1167537832] [2022-03-20 19:15:52,430 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:15:52,431 INFO L85 PathProgramCache]: Analyzing trace with hash 560911719, now seen corresponding path program 1 times [2022-03-20 19:15:52,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:52,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181355156] [2022-03-20 19:15:52,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:52,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:52,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:52,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:52,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181355156] [2022-03-20 19:15:52,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181355156] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:52,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:52,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:52,593 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:52,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1167537832] [2022-03-20 19:15:52,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1167537832] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:52,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:52,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 19:15:52,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164841627] [2022-03-20 19:15:52,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:52,594 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 19:15:52,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:52,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 19:15:52,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-03-20 19:15:52,595 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 16 states, 16 states have (on average 1.125) 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) [2022-03-20 19:15:52,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:52,764 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2022-03-20 19:15:52,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 19:15:52,765 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.125) 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 [2022-03-20 19:15:52,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:52,766 INFO L225 Difference]: With dead ends: 29 [2022-03-20 19:15:52,766 INFO L226 Difference]: Without dead ends: 24 [2022-03-20 19:15:52,766 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=574, Unknown=0, NotChecked=0, Total=812 [2022-03-20 19:15:52,767 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:52,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:15:52,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-20 19:15:52,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-20 19:15:52,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:52,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2022-03-20 19:15:52,769 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2022-03-20 19:15:52,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:52,770 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2022-03-20 19:15:52,770 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.125) 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) [2022-03-20 19:15:52,770 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2022-03-20 19:15:52,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 19:15:52,770 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:52,770 INFO L499 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:52,770 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 19:15:52,770 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:52,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:52,771 INFO L85 PathProgramCache]: Analyzing trace with hash 107739974, now seen corresponding path program 11 times [2022-03-20 19:15:52,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:52,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [456560462] [2022-03-20 19:15:52,890 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:15:52,891 INFO L85 PathProgramCache]: Analyzing trace with hash 620017063, now seen corresponding path program 1 times [2022-03-20 19:15:52,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:52,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107104858] [2022-03-20 19:15:52,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:52,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:52,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:52,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:52,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107104858] [2022-03-20 19:15:52,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107104858] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:52,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:52,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:53,083 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:53,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [456560462] [2022-03-20 19:15:53,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [456560462] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:53,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:53,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 19:15:53,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088214691] [2022-03-20 19:15:53,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:53,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 19:15:53,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:53,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 19:15:53,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-03-20 19:15:53,084 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 17 states, 17 states have (on average 1.1176470588235294) 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) [2022-03-20 19:15:53,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:53,268 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-03-20 19:15:53,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 19:15:53,269 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1176470588235294) 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 [2022-03-20 19:15:53,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:53,269 INFO L225 Difference]: With dead ends: 30 [2022-03-20 19:15:53,269 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 19:15:53,270 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2022-03-20 19:15:53,270 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:53,270 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:15:53,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 19:15:53,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-20 19:15:53,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:53,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2022-03-20 19:15:53,273 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2022-03-20 19:15:53,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:53,273 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2022-03-20 19:15:53,273 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1176470588235294) 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) [2022-03-20 19:15:53,273 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2022-03-20 19:15:53,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 19:15:53,274 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:53,274 INFO L499 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:53,274 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 19:15:53,274 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:53,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:53,274 INFO L85 PathProgramCache]: Analyzing trace with hash -919639272, now seen corresponding path program 12 times [2022-03-20 19:15:53,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:53,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [907062941] [2022-03-20 19:15:53,395 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:15:53,396 INFO L85 PathProgramCache]: Analyzing trace with hash 679122407, now seen corresponding path program 1 times [2022-03-20 19:15:53,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:53,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956116375] [2022-03-20 19:15:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:53,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:53,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:53,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:53,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956116375] [2022-03-20 19:15:53,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956116375] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:53,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:53,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:53,564 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:53,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [907062941] [2022-03-20 19:15:53,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [907062941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:53,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:53,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 19:15:53,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040943775] [2022-03-20 19:15:53,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:53,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 19:15:53,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:53,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 19:15:53,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-03-20 19:15:53,565 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 18 states, 18 states have (on average 1.1111111111111112) 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) [2022-03-20 19:15:53,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:53,768 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2022-03-20 19:15:53,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 19:15:53,768 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1111111111111112) 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 [2022-03-20 19:15:53,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:53,769 INFO L225 Difference]: With dead ends: 31 [2022-03-20 19:15:53,769 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 19:15:53,769 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=739, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 19:15:53,770 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:53,770 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:15:53,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 19:15:53,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-20 19:15:53,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:53,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2022-03-20 19:15:53,772 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2022-03-20 19:15:53,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:53,773 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2022-03-20 19:15:53,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.1111111111111112) 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) [2022-03-20 19:15:53,773 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2022-03-20 19:15:53,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 19:15:53,773 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:53,773 INFO L499 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:53,773 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 19:15:53,773 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:53,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:53,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1591342470, now seen corresponding path program 13 times [2022-03-20 19:15:53,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:53,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1903723741] [2022-03-20 19:15:53,891 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:15:53,891 INFO L85 PathProgramCache]: Analyzing trace with hash 738227751, now seen corresponding path program 1 times [2022-03-20 19:15:53,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:53,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148110312] [2022-03-20 19:15:53,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:53,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:53,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:53,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:53,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148110312] [2022-03-20 19:15:53,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148110312] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:53,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:53,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:54,089 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:54,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1903723741] [2022-03-20 19:15:54,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1903723741] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:54,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:54,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 19:15:54,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714708242] [2022-03-20 19:15:54,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:54,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 19:15:54,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:54,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 19:15:54,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-03-20 19:15:54,091 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 19 states, 19 states have (on average 1.105263157894737) 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) [2022-03-20 19:15:54,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:54,310 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-03-20 19:15:54,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 19:15:54,310 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.105263157894737) 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 [2022-03-20 19:15:54,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:54,311 INFO L225 Difference]: With dead ends: 32 [2022-03-20 19:15:54,311 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 19:15:54,311 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=361, Invalid=829, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 19:15:54,312 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:54,312 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:15:54,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 19:15:54,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 19:15:54,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-03-20 19:15:54,315 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2022-03-20 19:15:54,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:54,315 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-03-20 19:15:54,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.105263157894737) 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) [2022-03-20 19:15:54,315 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-03-20 19:15:54,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 19:15:54,316 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:54,316 INFO L499 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:54,316 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 19:15:54,316 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:54,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:54,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2122365144, now seen corresponding path program 14 times [2022-03-20 19:15:54,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:54,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [726584633] [2022-03-20 19:15:54,403 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:15:54,404 INFO L85 PathProgramCache]: Analyzing trace with hash 797333095, now seen corresponding path program 1 times [2022-03-20 19:15:54,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:54,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094708098] [2022-03-20 19:15:54,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:54,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:54,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:54,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:54,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094708098] [2022-03-20 19:15:54,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094708098] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:54,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:54,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:54,671 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:54,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [726584633] [2022-03-20 19:15:54,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [726584633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:54,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:54,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 19:15:54,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459864836] [2022-03-20 19:15:54,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:54,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 19:15:54,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:54,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 19:15:54,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2022-03-20 19:15:54,672 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 20 states, 20 states have (on average 1.1) 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) [2022-03-20 19:15:54,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:54,869 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2022-03-20 19:15:54,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 19:15:54,869 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.1) 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 [2022-03-20 19:15:54,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:54,869 INFO L225 Difference]: With dead ends: 33 [2022-03-20 19:15:54,869 INFO L226 Difference]: Without dead ends: 28 [2022-03-20 19:15:54,870 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=924, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 19:15:54,870 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:54,870 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:15:54,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-20 19:15:54,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-20 19:15:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:54,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2022-03-20 19:15:54,873 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2022-03-20 19:15:54,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:54,873 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2022-03-20 19:15:54,873 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.1) 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) [2022-03-20 19:15:54,873 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2022-03-20 19:15:54,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 19:15:54,874 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:54,874 INFO L499 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:54,874 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 19:15:54,874 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:54,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:54,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1404198854, now seen corresponding path program 15 times [2022-03-20 19:15:54,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:54,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1710160848] [2022-03-20 19:15:55,026 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:15:55,026 INFO L85 PathProgramCache]: Analyzing trace with hash 856438439, now seen corresponding path program 1 times [2022-03-20 19:15:55,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:55,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559473045] [2022-03-20 19:15:55,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:55,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:55,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:55,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:55,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559473045] [2022-03-20 19:15:55,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559473045] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:55,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:55,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:55,270 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:55,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1710160848] [2022-03-20 19:15:55,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1710160848] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:55,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:55,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 19:15:55,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200122638] [2022-03-20 19:15:55,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:55,272 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 19:15:55,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:55,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 19:15:55,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2022-03-20 19:15:55,272 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 21 states, 21 states have (on average 1.0952380952380953) 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) [2022-03-20 19:15:55,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:55,544 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-03-20 19:15:55,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 19:15:55,544 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.0952380952380953) 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 [2022-03-20 19:15:55,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:55,544 INFO L225 Difference]: With dead ends: 34 [2022-03-20 19:15:55,544 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 19:15:55,545 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=1024, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 19:15:55,545 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:55,545 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:15:55,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 19:15:55,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-20 19:15:55,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:55,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-03-20 19:15:55,548 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2022-03-20 19:15:55,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:55,548 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-03-20 19:15:55,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.0952380952380953) 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) [2022-03-20 19:15:55,548 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-03-20 19:15:55,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 19:15:55,549 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:55,549 INFO L499 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:55,549 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-20 19:15:55,549 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:55,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:55,549 INFO L85 PathProgramCache]: Analyzing trace with hash 615880344, now seen corresponding path program 16 times [2022-03-20 19:15:55,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:55,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1779675942] [2022-03-20 19:15:55,672 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:15:55,672 INFO L85 PathProgramCache]: Analyzing trace with hash 915543783, now seen corresponding path program 1 times [2022-03-20 19:15:55,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:55,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852917117] [2022-03-20 19:15:55,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:55,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:55,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:55,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:55,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852917117] [2022-03-20 19:15:55,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852917117] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:55,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:55,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:55,921 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:55,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1779675942] [2022-03-20 19:15:55,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1779675942] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:55,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:55,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 19:15:55,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943723240] [2022-03-20 19:15:55,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:55,921 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 19:15:55,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:55,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 19:15:55,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2022-03-20 19:15:55,922 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 22 states, 22 states have (on average 1.0909090909090908) 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) [2022-03-20 19:15:56,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:56,290 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2022-03-20 19:15:56,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 19:15:56,291 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.0909090909090908) 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 [2022-03-20 19:15:56,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:56,291 INFO L225 Difference]: With dead ends: 35 [2022-03-20 19:15:56,291 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 19:15:56,291 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=511, Invalid=1129, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 19:15:56,292 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:56,292 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:15:56,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 19:15:56,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-20 19:15:56,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:56,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2022-03-20 19:15:56,295 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2022-03-20 19:15:56,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:56,295 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2022-03-20 19:15:56,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.0909090909090908) 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) [2022-03-20 19:15:56,296 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2022-03-20 19:15:56,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 19:15:56,296 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:56,296 INFO L499 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:56,296 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-20 19:15:56,296 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:56,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:56,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1947810310, now seen corresponding path program 17 times [2022-03-20 19:15:56,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:56,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [752413047] [2022-03-20 19:15:56,412 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:15:56,412 INFO L85 PathProgramCache]: Analyzing trace with hash 974649127, now seen corresponding path program 1 times [2022-03-20 19:15:56,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:56,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191555990] [2022-03-20 19:15:56,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:56,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:56,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:56,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:56,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:56,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191555990] [2022-03-20 19:15:56,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191555990] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:56,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:56,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:56,652 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:56,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [752413047] [2022-03-20 19:15:56,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [752413047] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:56,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:56,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 19:15:56,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636296396] [2022-03-20 19:15:56,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:56,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 19:15:56,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:56,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 19:15:56,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2022-03-20 19:15:56,653 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 23 states, 23 states have (on average 1.0869565217391304) 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) [2022-03-20 19:15:56,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:56,944 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-03-20 19:15:56,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 19:15:56,945 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.0869565217391304) 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 [2022-03-20 19:15:56,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:56,945 INFO L225 Difference]: With dead ends: 36 [2022-03-20 19:15:56,945 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 19:15:56,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=567, Invalid=1239, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 19:15:56,946 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:56,946 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:15:56,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 19:15:56,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-20 19:15:56,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:56,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-03-20 19:15:56,949 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2022-03-20 19:15:56,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:56,949 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-03-20 19:15:56,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.0869565217391304) 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) [2022-03-20 19:15:56,949 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-03-20 19:15:56,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 19:15:56,949 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:56,949 INFO L499 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:56,950 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-20 19:15:56,950 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:56,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:56,950 INFO L85 PathProgramCache]: Analyzing trace with hash 287966296, now seen corresponding path program 18 times [2022-03-20 19:15:56,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:56,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1195541419] [2022-03-20 19:15:57,064 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:15:57,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1033754471, now seen corresponding path program 1 times [2022-03-20 19:15:57,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:57,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171319609] [2022-03-20 19:15:57,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:57,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:57,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:57,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:57,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171319609] [2022-03-20 19:15:57,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171319609] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:57,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:57,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:57,313 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:57,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1195541419] [2022-03-20 19:15:57,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1195541419] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:57,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:57,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 19:15:57,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093381018] [2022-03-20 19:15:57,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:57,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 19:15:57,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:57,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 19:15:57,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2022-03-20 19:15:57,314 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 24 states, 24 states have (on average 1.0833333333333333) 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) [2022-03-20 19:15:57,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:57,610 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2022-03-20 19:15:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 19:15:57,611 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.0833333333333333) 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 [2022-03-20 19:15:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:57,611 INFO L225 Difference]: With dead ends: 37 [2022-03-20 19:15:57,611 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 19:15:57,612 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=626, Invalid=1354, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 19:15:57,612 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:57,612 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:15:57,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 19:15:57,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 19:15:57,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:57,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2022-03-20 19:15:57,615 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2022-03-20 19:15:57,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:57,615 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2022-03-20 19:15:57,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.0833333333333333) 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) [2022-03-20 19:15:57,615 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2022-03-20 19:15:57,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 19:15:57,615 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:57,615 INFO L499 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:57,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-20 19:15:57,616 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:57,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:57,616 INFO L85 PathProgramCache]: Analyzing trace with hash 372409414, now seen corresponding path program 19 times [2022-03-20 19:15:57,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:57,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1378211121] [2022-03-20 19:15:57,728 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:15:57,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1092859815, now seen corresponding path program 1 times [2022-03-20 19:15:57,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:57,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211043760] [2022-03-20 19:15:57,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:57,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:57,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:57,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:57,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211043760] [2022-03-20 19:15:57,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211043760] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:57,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:57,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:57,983 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:57,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1378211121] [2022-03-20 19:15:57,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1378211121] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:57,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:57,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 19:15:57,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28784891] [2022-03-20 19:15:57,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:57,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 19:15:57,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:57,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 19:15:57,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2022-03-20 19:15:57,985 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 25 states, 25 states have (on average 1.08) 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) [2022-03-20 19:15:58,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:58,311 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-03-20 19:15:58,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 19:15:58,312 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.08) 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 [2022-03-20 19:15:58,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:58,312 INFO L225 Difference]: With dead ends: 38 [2022-03-20 19:15:58,312 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 19:15:58,313 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=688, Invalid=1474, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 19:15:58,314 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:58,314 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 32 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:15:58,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 19:15:58,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-20 19:15:58,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:58,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-03-20 19:15:58,316 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2022-03-20 19:15:58,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:58,317 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-03-20 19:15:58,317 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.08) 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) [2022-03-20 19:15:58,317 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-03-20 19:15:58,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 19:15:58,317 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:58,317 INFO L499 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:58,317 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-20 19:15:58,317 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:58,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:58,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1304821224, now seen corresponding path program 20 times [2022-03-20 19:15:58,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:58,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [38037387] [2022-03-20 19:15:58,430 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:15:58,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1151965159, now seen corresponding path program 1 times [2022-03-20 19:15:58,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:58,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903152220] [2022-03-20 19:15:58,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:58,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:58,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:58,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:58,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903152220] [2022-03-20 19:15:58,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903152220] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:58,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:58,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:58,753 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:58,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [38037387] [2022-03-20 19:15:58,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [38037387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:58,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:58,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 19:15:58,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772656506] [2022-03-20 19:15:58,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:58,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 19:15:58,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:58,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 19:15:58,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2022-03-20 19:15:58,754 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 26 states, 26 states have (on average 1.0769230769230769) 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) [2022-03-20 19:15:59,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:59,094 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2022-03-20 19:15:59,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 19:15:59,095 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.0769230769230769) 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 [2022-03-20 19:15:59,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:59,095 INFO L225 Difference]: With dead ends: 39 [2022-03-20 19:15:59,095 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 19:15:59,096 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=753, Invalid=1599, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 19:15:59,096 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:59,096 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:15:59,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 19:15:59,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-20 19:15:59,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:59,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2022-03-20 19:15:59,099 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2022-03-20 19:15:59,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:59,099 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2022-03-20 19:15:59,100 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.0769230769230769) 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) [2022-03-20 19:15:59,100 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2022-03-20 19:15:59,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 19:15:59,100 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:59,100 INFO L499 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:59,100 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-20 19:15:59,100 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:59,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1759363450, now seen corresponding path program 21 times [2022-03-20 19:15:59,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:59,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1839249275] [2022-03-20 19:15:59,220 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:15:59,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1211070503, now seen corresponding path program 1 times [2022-03-20 19:15:59,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:59,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963700085] [2022-03-20 19:15:59,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:59,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:59,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:59,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:59,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963700085] [2022-03-20 19:15:59,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963700085] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:59,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:59,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:15:59,455 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:59,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1839249275] [2022-03-20 19:15:59,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1839249275] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:59,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:59,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 19:15:59,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800163278] [2022-03-20 19:15:59,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:59,455 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 19:15:59,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:59,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 19:15:59,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=441, Unknown=0, NotChecked=0, Total=702 [2022-03-20 19:15:59,456 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 27 states, 27 states have (on average 1.0740740740740742) 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) [2022-03-20 19:15:59,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:59,781 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-03-20 19:15:59,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 19:15:59,781 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.0740740740740742) 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 [2022-03-20 19:15:59,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:59,782 INFO L225 Difference]: With dead ends: 40 [2022-03-20 19:15:59,782 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 19:15:59,784 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=821, Invalid=1729, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 19:15:59,785 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:59,785 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:15:59,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 19:15:59,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 19:15:59,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:15:59,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2022-03-20 19:15:59,794 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2022-03-20 19:15:59,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:59,795 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2022-03-20 19:15:59,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.0740740740740742) 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) [2022-03-20 19:15:59,795 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2022-03-20 19:15:59,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 19:15:59,795 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:59,795 INFO L499 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:59,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-20 19:15:59,795 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:59,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:59,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1329696728, now seen corresponding path program 22 times [2022-03-20 19:15:59,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:59,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [550924945] [2022-03-20 19:15:59,943 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:15:59,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1270175847, now seen corresponding path program 1 times [2022-03-20 19:15:59,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:59,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033477461] [2022-03-20 19:15:59,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:59,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:59,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:59,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:59,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033477461] [2022-03-20 19:15:59,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033477461] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:59,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:59,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:00,267 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:00,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [550924945] [2022-03-20 19:16:00,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [550924945] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:00,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:00,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 19:16:00,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577832190] [2022-03-20 19:16:00,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:00,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 19:16:00,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:00,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 19:16:00,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=472, Unknown=0, NotChecked=0, Total=756 [2022-03-20 19:16:00,268 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 28 states, 28 states have (on average 1.0714285714285714) 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) [2022-03-20 19:16:00,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:00,635 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2022-03-20 19:16:00,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 19:16:00,635 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.0714285714285714) 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 [2022-03-20 19:16:00,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:00,636 INFO L225 Difference]: With dead ends: 41 [2022-03-20 19:16:00,636 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 19:16:00,637 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=892, Invalid=1864, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 19:16:00,637 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:00,637 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:16:00,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 19:16:00,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-20 19:16:00,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2022-03-20 19:16:00,639 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2022-03-20 19:16:00,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:00,639 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2022-03-20 19:16:00,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.0714285714285714) 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) [2022-03-20 19:16:00,640 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2022-03-20 19:16:00,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 19:16:00,640 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:00,640 INFO L499 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:00,640 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-20 19:16:00,640 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:00,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:00,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1693685562, now seen corresponding path program 23 times [2022-03-20 19:16:00,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:00,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2068886139] [2022-03-20 19:16:00,761 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:00,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1329281191, now seen corresponding path program 1 times [2022-03-20 19:16:00,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:00,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104565949] [2022-03-20 19:16:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:00,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:00,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:00,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:00,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104565949] [2022-03-20 19:16:00,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104565949] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:00,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:00,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:01,089 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:01,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2068886139] [2022-03-20 19:16:01,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2068886139] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:01,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:01,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 19:16:01,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001220000] [2022-03-20 19:16:01,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:01,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 19:16:01,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:01,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 19:16:01,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=504, Unknown=0, NotChecked=0, Total=812 [2022-03-20 19:16:01,090 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 29 states, 29 states have (on average 1.0689655172413792) 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) [2022-03-20 19:16:01,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:01,359 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-03-20 19:16:01,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 19:16:01,359 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.0689655172413792) 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 [2022-03-20 19:16:01,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:01,359 INFO L225 Difference]: With dead ends: 42 [2022-03-20 19:16:01,359 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 19:16:01,360 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=966, Invalid=2004, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 19:16:01,361 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:01,361 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:16:01,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 19:16:01,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-20 19:16:01,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:01,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2022-03-20 19:16:01,372 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2022-03-20 19:16:01,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:01,374 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2022-03-20 19:16:01,374 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.0689655172413792) 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) [2022-03-20 19:16:01,374 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2022-03-20 19:16:01,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 19:16:01,375 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:01,375 INFO L499 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:01,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-20 19:16:01,375 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:01,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:01,376 INFO L85 PathProgramCache]: Analyzing trace with hash -929256040, now seen corresponding path program 24 times [2022-03-20 19:16:01,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:01,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1592267193] [2022-03-20 19:16:01,467 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:01,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1388386535, now seen corresponding path program 1 times [2022-03-20 19:16:01,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:01,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908273890] [2022-03-20 19:16:01,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:01,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:01,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:01,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:01,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908273890] [2022-03-20 19:16:01,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908273890] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:01,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:01,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:01,777 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:01,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1592267193] [2022-03-20 19:16:01,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1592267193] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:01,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:01,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 19:16:01,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475255748] [2022-03-20 19:16:01,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:01,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 19:16:01,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:01,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 19:16:01,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=537, Unknown=0, NotChecked=0, Total=870 [2022-03-20 19:16:01,779 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 30 states, 30 states have (on average 1.0666666666666667) 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) [2022-03-20 19:16:02,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:02,052 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2022-03-20 19:16:02,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 19:16:02,052 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.0666666666666667) 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 [2022-03-20 19:16:02,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:02,053 INFO L225 Difference]: With dead ends: 43 [2022-03-20 19:16:02,053 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 19:16:02,054 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1043, Invalid=2149, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 19:16:02,054 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:02,054 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:16:02,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 19:16:02,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-20 19:16:02,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:02,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2022-03-20 19:16:02,062 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2022-03-20 19:16:02,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:02,062 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2022-03-20 19:16:02,062 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.0666666666666667) 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) [2022-03-20 19:16:02,063 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2022-03-20 19:16:02,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 19:16:02,063 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:02,063 INFO L499 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:02,063 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-20 19:16:02,063 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:02,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:02,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1293222662, now seen corresponding path program 25 times [2022-03-20 19:16:02,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:02,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [554185574] [2022-03-20 19:16:02,118 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:02,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1447491879, now seen corresponding path program 1 times [2022-03-20 19:16:02,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:02,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995099711] [2022-03-20 19:16:02,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:02,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:02,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:02,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:02,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995099711] [2022-03-20 19:16:02,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995099711] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:02,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:02,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:02,530 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:02,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [554185574] [2022-03-20 19:16:02,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [554185574] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:02,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:02,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 19:16:02,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971209143] [2022-03-20 19:16:02,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:02,531 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 19:16:02,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:02,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 19:16:02,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=571, Unknown=0, NotChecked=0, Total=930 [2022-03-20 19:16:02,532 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 31 states, 31 states have (on average 1.064516129032258) 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) [2022-03-20 19:16:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:02,925 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-03-20 19:16:02,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 19:16:02,929 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.064516129032258) 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 [2022-03-20 19:16:02,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:02,930 INFO L225 Difference]: With dead ends: 44 [2022-03-20 19:16:02,930 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 19:16:02,931 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1123, Invalid=2299, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 19:16:02,931 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:02,933 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:02,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 19:16:02,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-20 19:16:02,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:02,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2022-03-20 19:16:02,937 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2022-03-20 19:16:02,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:02,937 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2022-03-20 19:16:02,937 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.064516129032258) 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) [2022-03-20 19:16:02,937 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2022-03-20 19:16:02,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 19:16:02,937 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:02,937 INFO L499 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:02,937 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-20 19:16:02,938 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:02,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:02,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1470585688, now seen corresponding path program 26 times [2022-03-20 19:16:02,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:02,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2031800877] [2022-03-20 19:16:03,037 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:03,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1506597223, now seen corresponding path program 1 times [2022-03-20 19:16:03,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:03,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144218894] [2022-03-20 19:16:03,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:03,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:03,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:03,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:03,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:03,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144218894] [2022-03-20 19:16:03,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144218894] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:03,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:03,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:03,478 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:03,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2031800877] [2022-03-20 19:16:03,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2031800877] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:03,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:03,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 19:16:03,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357056648] [2022-03-20 19:16:03,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:03,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 19:16:03,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:03,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 19:16:03,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=606, Unknown=0, NotChecked=0, Total=992 [2022-03-20 19:16:03,480 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 32 states, 32 states have (on average 1.0625) 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) [2022-03-20 19:16:03,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:03,838 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2022-03-20 19:16:03,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 19:16:03,839 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.0625) 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 [2022-03-20 19:16:03,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:03,839 INFO L225 Difference]: With dead ends: 45 [2022-03-20 19:16:03,839 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 19:16:03,840 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1206, Invalid=2454, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 19:16:03,841 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:03,841 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:16:03,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 19:16:03,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-20 19:16:03,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:03,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2022-03-20 19:16:03,843 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2022-03-20 19:16:03,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:03,843 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2022-03-20 19:16:03,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.0625) 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) [2022-03-20 19:16:03,843 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2022-03-20 19:16:03,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 19:16:03,843 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:03,843 INFO L499 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:03,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-20 19:16:03,844 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:03,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:03,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1621095098, now seen corresponding path program 27 times [2022-03-20 19:16:03,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:03,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [474308432] [2022-03-20 19:16:03,919 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:03,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1565702567, now seen corresponding path program 1 times [2022-03-20 19:16:03,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:03,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559632667] [2022-03-20 19:16:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:03,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:03,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:03,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:03,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:03,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559632667] [2022-03-20 19:16:03,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559632667] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:03,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:03,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:04,370 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:04,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [474308432] [2022-03-20 19:16:04,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [474308432] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:04,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:04,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 19:16:04,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579118373] [2022-03-20 19:16:04,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:04,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 19:16:04,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:04,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 19:16:04,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=642, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 19:16:04,371 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 33 states, 33 states have (on average 1.0606060606060606) 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) [2022-03-20 19:16:04,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:04,880 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-03-20 19:16:04,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 19:16:04,880 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.0606060606060606) 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 [2022-03-20 19:16:04,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:04,881 INFO L225 Difference]: With dead ends: 46 [2022-03-20 19:16:04,881 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 19:16:04,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1292, Invalid=2614, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 19:16:04,882 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:04,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:04,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 19:16:04,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-20 19:16:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:04,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2022-03-20 19:16:04,884 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2022-03-20 19:16:04,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:04,885 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2022-03-20 19:16:04,885 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.0606060606060606) 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) [2022-03-20 19:16:04,885 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2022-03-20 19:16:04,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 19:16:04,885 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:04,885 INFO L499 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:04,885 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-20 19:16:04,885 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:04,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:04,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1321048344, now seen corresponding path program 28 times [2022-03-20 19:16:04,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:04,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [610176301] [2022-03-20 19:16:05,000 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:05,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1624807911, now seen corresponding path program 1 times [2022-03-20 19:16:05,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:05,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140483241] [2022-03-20 19:16:05,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:05,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:05,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:05,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:05,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140483241] [2022-03-20 19:16:05,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140483241] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:05,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:05,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:05,374 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:05,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [610176301] [2022-03-20 19:16:05,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [610176301] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:05,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:05,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 19:16:05,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937715758] [2022-03-20 19:16:05,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:05,378 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 19:16:05,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:05,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 19:16:05,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=679, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 19:16:05,379 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 34 states, 34 states have (on average 1.0588235294117647) 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) [2022-03-20 19:16:05,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:05,883 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2022-03-20 19:16:05,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 19:16:05,883 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.0588235294117647) 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 [2022-03-20 19:16:05,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:05,884 INFO L225 Difference]: With dead ends: 47 [2022-03-20 19:16:05,884 INFO L226 Difference]: Without dead ends: 42 [2022-03-20 19:16:05,885 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1381, Invalid=2779, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 19:16:05,885 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:05,885 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:05,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-20 19:16:05,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-03-20 19:16:05,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:05,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2022-03-20 19:16:05,888 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2022-03-20 19:16:05,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:05,888 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2022-03-20 19:16:05,888 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.0588235294117647) 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) [2022-03-20 19:16:05,888 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2022-03-20 19:16:05,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 19:16:05,888 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:05,888 INFO L499 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:05,888 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-20 19:16:05,888 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:05,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:05,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1961785466, now seen corresponding path program 29 times [2022-03-20 19:16:05,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:05,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1488420068] [2022-03-20 19:16:05,994 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:05,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1683913255, now seen corresponding path program 1 times [2022-03-20 19:16:05,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:05,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939845869] [2022-03-20 19:16:05,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:05,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:06,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:06,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:06,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939845869] [2022-03-20 19:16:06,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939845869] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:06,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:06,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:06,379 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:06,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1488420068] [2022-03-20 19:16:06,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1488420068] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:06,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:06,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 19:16:06,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548553072] [2022-03-20 19:16:06,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:06,380 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 19:16:06,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:06,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 19:16:06,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=717, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 19:16:06,382 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 35 states, 35 states have (on average 1.0571428571428572) 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) [2022-03-20 19:16:06,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:06,796 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-03-20 19:16:06,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 19:16:06,796 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.0571428571428572) 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 [2022-03-20 19:16:06,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:06,796 INFO L225 Difference]: With dead ends: 48 [2022-03-20 19:16:06,796 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 19:16:06,797 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1473, Invalid=2949, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 19:16:06,797 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:06,797 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 32 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:06,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 19:16:06,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-20 19:16:06,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:06,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-03-20 19:16:06,800 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2022-03-20 19:16:06,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:06,800 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-03-20 19:16:06,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.0571428571428572) 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) [2022-03-20 19:16:06,800 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-03-20 19:16:06,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 19:16:06,800 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:06,800 INFO L499 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:06,800 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-20 19:16:06,800 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:06,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:06,801 INFO L85 PathProgramCache]: Analyzing trace with hash -650418472, now seen corresponding path program 30 times [2022-03-20 19:16:06,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:06,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [72470611] [2022-03-20 19:16:06,851 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:06,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1743018599, now seen corresponding path program 1 times [2022-03-20 19:16:06,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:06,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120414904] [2022-03-20 19:16:06,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:06,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:06,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:06,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:06,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120414904] [2022-03-20 19:16:06,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120414904] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:06,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:06,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:07,231 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:07,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [72470611] [2022-03-20 19:16:07,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [72470611] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:07,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:07,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 19:16:07,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448517337] [2022-03-20 19:16:07,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:07,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 19:16:07,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:07,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 19:16:07,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=756, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 19:16:07,232 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 36 states, 36 states have (on average 1.0555555555555556) 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) [2022-03-20 19:16:07,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:07,602 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2022-03-20 19:16:07,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 19:16:07,602 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.0555555555555556) 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 [2022-03-20 19:16:07,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:07,602 INFO L225 Difference]: With dead ends: 49 [2022-03-20 19:16:07,602 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 19:16:07,603 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1568, Invalid=3124, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 19:16:07,603 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:07,603 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:16:07,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 19:16:07,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-20 19:16:07,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:07,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2022-03-20 19:16:07,606 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2022-03-20 19:16:07,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:07,606 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2022-03-20 19:16:07,606 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.0555555555555556) 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) [2022-03-20 19:16:07,606 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2022-03-20 19:16:07,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 19:16:07,606 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:07,606 INFO L499 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:07,606 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-20 19:16:07,606 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:07,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:07,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1347252678, now seen corresponding path program 31 times [2022-03-20 19:16:07,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:07,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1402310329] [2022-03-20 19:16:07,688 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:07,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1802123943, now seen corresponding path program 1 times [2022-03-20 19:16:07,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:07,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535292429] [2022-03-20 19:16:07,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:07,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:07,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:07,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:07,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535292429] [2022-03-20 19:16:07,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535292429] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:07,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:07,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:08,087 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:08,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1402310329] [2022-03-20 19:16:08,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1402310329] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:08,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:08,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 19:16:08,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221714338] [2022-03-20 19:16:08,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:08,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 19:16:08,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:08,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 19:16:08,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=796, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 19:16:08,088 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 37 states, 37 states have (on average 1.054054054054054) 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) [2022-03-20 19:16:08,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:08,496 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-03-20 19:16:08,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 19:16:08,497 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.054054054054054) 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 [2022-03-20 19:16:08,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:08,497 INFO L225 Difference]: With dead ends: 50 [2022-03-20 19:16:08,497 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 19:16:08,498 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1666, Invalid=3304, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 19:16:08,498 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:08,498 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:16:08,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 19:16:08,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-20 19:16:08,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:08,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2022-03-20 19:16:08,501 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2022-03-20 19:16:08,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:08,501 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2022-03-20 19:16:08,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.054054054054054) 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) [2022-03-20 19:16:08,501 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2022-03-20 19:16:08,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 19:16:08,501 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:08,501 INFO L499 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:08,501 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-20 19:16:08,501 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:08,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:08,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1149451112, now seen corresponding path program 32 times [2022-03-20 19:16:08,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:08,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [523187232] [2022-03-20 19:16:08,635 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:08,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1861229287, now seen corresponding path program 1 times [2022-03-20 19:16:08,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:08,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868042863] [2022-03-20 19:16:08,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:08,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:08,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:08,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:08,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:08,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868042863] [2022-03-20 19:16:08,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868042863] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:08,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:08,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:09,229 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:09,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [523187232] [2022-03-20 19:16:09,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [523187232] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:09,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:09,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 19:16:09,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653845552] [2022-03-20 19:16:09,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:09,229 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 19:16:09,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:09,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 19:16:09,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=837, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 19:16:09,230 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 38 states, 38 states have (on average 1.0526315789473684) 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) [2022-03-20 19:16:09,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:09,651 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2022-03-20 19:16:09,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 19:16:09,652 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.0526315789473684) 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 [2022-03-20 19:16:09,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:09,652 INFO L225 Difference]: With dead ends: 51 [2022-03-20 19:16:09,652 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 19:16:09,653 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1767, Invalid=3489, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 19:16:09,654 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:09,655 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:16:09,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 19:16:09,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-20 19:16:09,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:09,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2022-03-20 19:16:09,657 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2022-03-20 19:16:09,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:09,657 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2022-03-20 19:16:09,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.0526315789473684) 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) [2022-03-20 19:16:09,657 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2022-03-20 19:16:09,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 19:16:09,658 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:09,658 INFO L499 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:09,658 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-20 19:16:09,658 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:09,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:09,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1237857274, now seen corresponding path program 33 times [2022-03-20 19:16:09,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:09,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1251320894] [2022-03-20 19:16:09,741 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:09,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1920334631, now seen corresponding path program 1 times [2022-03-20 19:16:09,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:09,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896532196] [2022-03-20 19:16:09,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:09,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:09,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:09,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:09,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896532196] [2022-03-20 19:16:09,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896532196] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:09,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:09,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:10,378 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:10,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1251320894] [2022-03-20 19:16:10,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1251320894] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:10,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:10,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 19:16:10,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479030268] [2022-03-20 19:16:10,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:10,378 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 19:16:10,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:10,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 19:16:10,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=879, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 19:16:10,379 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 39 states, 39 states have (on average 1.0512820512820513) 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) [2022-03-20 19:16:11,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:11,066 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-03-20 19:16:11,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 19:16:11,067 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.0512820512820513) 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 [2022-03-20 19:16:11,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:11,067 INFO L225 Difference]: With dead ends: 52 [2022-03-20 19:16:11,067 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 19:16:11,068 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1871, Invalid=3679, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 19:16:11,068 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:11,068 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:11,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 19:16:11,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-20 19:16:11,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:11,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2022-03-20 19:16:11,071 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2022-03-20 19:16:11,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:11,071 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2022-03-20 19:16:11,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.0512820512820513) 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) [2022-03-20 19:16:11,071 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2022-03-20 19:16:11,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 19:16:11,071 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:11,071 INFO L499 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:11,072 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-20 19:16:11,072 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:11,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:11,072 INFO L85 PathProgramCache]: Analyzing trace with hash 316519000, now seen corresponding path program 34 times [2022-03-20 19:16:11,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:11,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1239992492] [2022-03-20 19:16:11,163 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:11,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1979439975, now seen corresponding path program 1 times [2022-03-20 19:16:11,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:11,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245812066] [2022-03-20 19:16:11,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:11,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:11,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:11,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:11,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:11,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245812066] [2022-03-20 19:16:11,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245812066] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:11,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:11,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:11,796 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:11,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1239992492] [2022-03-20 19:16:11,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1239992492] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:11,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:11,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 19:16:11,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363200729] [2022-03-20 19:16:11,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:11,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 19:16:11,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:11,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 19:16:11,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=922, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 19:16:11,797 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 40 states, 40 states have (on average 1.05) 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) [2022-03-20 19:16:12,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:12,536 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2022-03-20 19:16:12,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 19:16:12,536 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.05) 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 [2022-03-20 19:16:12,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:12,537 INFO L225 Difference]: With dead ends: 53 [2022-03-20 19:16:12,537 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 19:16:12,537 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1978, Invalid=3874, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 19:16:12,538 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:12,538 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:12,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 19:16:12,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-20 19:16:12,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:12,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2022-03-20 19:16:12,540 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2022-03-20 19:16:12,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:12,540 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2022-03-20 19:16:12,540 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.05) 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) [2022-03-20 19:16:12,540 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2022-03-20 19:16:12,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 19:16:12,540 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:12,541 INFO L499 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:12,541 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-20 19:16:12,541 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:12,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:12,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1257543238, now seen corresponding path program 35 times [2022-03-20 19:16:12,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:12,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [846188063] [2022-03-20 19:16:12,613 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:12,613 INFO L85 PathProgramCache]: Analyzing trace with hash 2038545319, now seen corresponding path program 1 times [2022-03-20 19:16:12,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:12,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101935041] [2022-03-20 19:16:12,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:12,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:12,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:12,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:12,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101935041] [2022-03-20 19:16:12,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101935041] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:12,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:12,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:13,064 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:13,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [846188063] [2022-03-20 19:16:13,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [846188063] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:13,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:13,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 19:16:13,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895535116] [2022-03-20 19:16:13,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:13,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 19:16:13,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:13,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 19:16:13,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=966, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 19:16:13,066 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 41 states, 41 states have (on average 1.048780487804878) 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) [2022-03-20 19:16:13,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:13,661 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-03-20 19:16:13,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 19:16:13,662 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.048780487804878) 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 [2022-03-20 19:16:13,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:13,662 INFO L225 Difference]: With dead ends: 54 [2022-03-20 19:16:13,662 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 19:16:13,663 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2088, Invalid=4074, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 19:16:13,663 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:13,663 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:13,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 19:16:13,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-20 19:16:13,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2022-03-20 19:16:13,666 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2022-03-20 19:16:13,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:13,666 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2022-03-20 19:16:13,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.048780487804878) 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) [2022-03-20 19:16:13,666 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2022-03-20 19:16:13,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 19:16:13,667 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:13,667 INFO L499 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:13,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-20 19:16:13,667 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:13,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:13,667 INFO L85 PathProgramCache]: Analyzing trace with hash 364523544, now seen corresponding path program 36 times [2022-03-20 19:16:13,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:13,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1169591102] [2022-03-20 19:16:13,719 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:13,719 INFO L85 PathProgramCache]: Analyzing trace with hash 2097650663, now seen corresponding path program 1 times [2022-03-20 19:16:13,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:13,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200381393] [2022-03-20 19:16:13,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:13,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:13,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:13,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:13,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200381393] [2022-03-20 19:16:13,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200381393] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:13,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:13,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:14,338 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:14,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1169591102] [2022-03-20 19:16:14,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1169591102] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:14,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:14,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 19:16:14,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083385996] [2022-03-20 19:16:14,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:14,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 19:16:14,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:14,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 19:16:14,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=1011, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 19:16:14,340 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 42 states, 42 states have (on average 1.0476190476190477) 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) [2022-03-20 19:16:14,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:14,997 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2022-03-20 19:16:14,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 19:16:14,998 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0476190476190477) 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 [2022-03-20 19:16:14,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:14,998 INFO L225 Difference]: With dead ends: 55 [2022-03-20 19:16:14,998 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 19:16:14,999 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2201, Invalid=4279, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 19:16:14,999 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:15,000 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:15,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 19:16:15,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-03-20 19:16:15,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:15,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2022-03-20 19:16:15,002 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2022-03-20 19:16:15,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:15,002 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2022-03-20 19:16:15,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.0476190476190477) 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) [2022-03-20 19:16:15,002 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2022-03-20 19:16:15,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 19:16:15,003 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:15,003 INFO L499 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:15,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-20 19:16:15,003 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:15,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:15,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1549283194, now seen corresponding path program 37 times [2022-03-20 19:16:15,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:15,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [484023298] [2022-03-20 19:16:15,126 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:15,126 INFO L85 PathProgramCache]: Analyzing trace with hash -2138211289, now seen corresponding path program 1 times [2022-03-20 19:16:15,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:15,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258539608] [2022-03-20 19:16:15,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:15,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:15,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:15,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:15,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258539608] [2022-03-20 19:16:15,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258539608] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:15,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:15,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:15,824 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:15,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [484023298] [2022-03-20 19:16:15,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [484023298] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:15,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:15,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 19:16:15,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647395401] [2022-03-20 19:16:15,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:15,825 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 19:16:15,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:15,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 19:16:15,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=1057, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 19:16:15,826 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 43 states, 43 states have (on average 1.0465116279069768) 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) [2022-03-20 19:16:16,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:16,671 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-03-20 19:16:16,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 19:16:16,672 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.0465116279069768) 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 [2022-03-20 19:16:16,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:16,672 INFO L225 Difference]: With dead ends: 56 [2022-03-20 19:16:16,672 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 19:16:16,673 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2317, Invalid=4489, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 19:16:16,673 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:16,673 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:16,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 19:16:16,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-20 19:16:16,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:16,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-03-20 19:16:16,676 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2022-03-20 19:16:16,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:16,676 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-03-20 19:16:16,676 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.0465116279069768) 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) [2022-03-20 19:16:16,676 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-03-20 19:16:16,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 19:16:16,676 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:16,676 INFO L499 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:16,676 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-20 19:16:16,676 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:16,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:16,677 INFO L85 PathProgramCache]: Analyzing trace with hash -747749928, now seen corresponding path program 38 times [2022-03-20 19:16:16,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:16,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2031591736] [2022-03-20 19:16:16,792 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:16,792 INFO L85 PathProgramCache]: Analyzing trace with hash -2079105945, now seen corresponding path program 1 times [2022-03-20 19:16:16,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:16,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001568324] [2022-03-20 19:16:16,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:16,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:16,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:16,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:16,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:16,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001568324] [2022-03-20 19:16:16,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001568324] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:16,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:16,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:17,493 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:17,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2031591736] [2022-03-20 19:16:17,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2031591736] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:17,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:17,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 19:16:17,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413393721] [2022-03-20 19:16:17,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:17,494 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 19:16:17,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:17,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 19:16:17,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=788, Invalid=1104, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 19:16:17,495 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 44 states, 44 states have (on average 1.0454545454545454) 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) [2022-03-20 19:16:18,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:18,358 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2022-03-20 19:16:18,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 19:16:18,358 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0454545454545454) 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 [2022-03-20 19:16:18,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:18,358 INFO L225 Difference]: With dead ends: 57 [2022-03-20 19:16:18,358 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 19:16:18,359 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2436, Invalid=4704, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 19:16:18,359 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:18,359 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:18,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 19:16:18,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-20 19:16:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:18,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2022-03-20 19:16:18,362 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2022-03-20 19:16:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:18,363 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2022-03-20 19:16:18,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.0454545454545454) 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) [2022-03-20 19:16:18,363 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2022-03-20 19:16:18,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 19:16:18,363 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:18,363 INFO L499 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:18,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-20 19:16:18,363 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:18,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:18,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1670022458, now seen corresponding path program 39 times [2022-03-20 19:16:18,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:18,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1348959311] [2022-03-20 19:16:18,492 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:18,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2020000601, now seen corresponding path program 1 times [2022-03-20 19:16:18,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:18,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330005543] [2022-03-20 19:16:18,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:18,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:18,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:18,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:18,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330005543] [2022-03-20 19:16:18,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330005543] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:18,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:18,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:19,307 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:19,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1348959311] [2022-03-20 19:16:19,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1348959311] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:19,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:19,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 19:16:19,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673797533] [2022-03-20 19:16:19,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:19,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 19:16:19,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:19,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 19:16:19,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=1152, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 19:16:19,309 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 45 states, 45 states have (on average 1.0444444444444445) 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) [2022-03-20 19:16:20,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:20,222 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-03-20 19:16:20,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 19:16:20,222 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0444444444444445) 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 [2022-03-20 19:16:20,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:20,223 INFO L225 Difference]: With dead ends: 58 [2022-03-20 19:16:20,223 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 19:16:20,224 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2558, Invalid=4924, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 19:16:20,224 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:20,224 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 77 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 19:16:20,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-03-20 19:16:20,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:20,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-03-20 19:16:20,227 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2022-03-20 19:16:20,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:20,227 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-03-20 19:16:20,227 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.0444444444444445) 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) [2022-03-20 19:16:20,227 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-03-20 19:16:20,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 19:16:20,227 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:20,227 INFO L499 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:20,228 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-20 19:16:20,228 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:20,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:20,228 INFO L85 PathProgramCache]: Analyzing trace with hash -195699816, now seen corresponding path program 40 times [2022-03-20 19:16:20,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:20,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [527537158] [2022-03-20 19:16:20,285 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:20,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1960895257, now seen corresponding path program 1 times [2022-03-20 19:16:20,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:20,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310731376] [2022-03-20 19:16:20,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:20,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:20,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:20,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:20,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310731376] [2022-03-20 19:16:20,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310731376] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:20,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:20,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:20,796 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:20,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [527537158] [2022-03-20 19:16:20,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [527537158] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:20,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:20,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-20 19:16:20,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044473787] [2022-03-20 19:16:20,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:20,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 19:16:20,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:20,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 19:16:20,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=1201, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 19:16:20,798 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 46 states, 46 states have (on average 1.0434782608695652) 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) [2022-03-20 19:16:21,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:21,381 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2022-03-20 19:16:21,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 19:16:21,381 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.0434782608695652) 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 [2022-03-20 19:16:21,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:21,383 INFO L225 Difference]: With dead ends: 59 [2022-03-20 19:16:21,383 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 19:16:21,384 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2683, Invalid=5149, Unknown=0, NotChecked=0, Total=7832 [2022-03-20 19:16:21,384 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:21,385 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:21,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 19:16:21,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-20 19:16:21,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:21,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-03-20 19:16:21,387 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2022-03-20 19:16:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:21,387 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-03-20 19:16:21,388 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.0434782608695652) 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) [2022-03-20 19:16:21,388 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-03-20 19:16:21,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 19:16:21,388 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:21,388 INFO L499 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:21,388 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-20 19:16:21,388 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:21,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:21,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1736338170, now seen corresponding path program 41 times [2022-03-20 19:16:21,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:21,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1409626246] [2022-03-20 19:16:21,484 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:21,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1901789913, now seen corresponding path program 1 times [2022-03-20 19:16:21,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:21,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338127271] [2022-03-20 19:16:21,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:21,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:21,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:21,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:21,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338127271] [2022-03-20 19:16:21,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338127271] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:21,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:21,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:21,991 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:21,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1409626246] [2022-03-20 19:16:21,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1409626246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:21,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:21,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 19:16:21,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170375421] [2022-03-20 19:16:21,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:21,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 19:16:21,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:21,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 19:16:22,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=1251, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 19:16:22,004 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 47 states, 47 states have (on average 1.0425531914893618) 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) [2022-03-20 19:16:22,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:22,647 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-03-20 19:16:22,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 19:16:22,647 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0425531914893618) 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 [2022-03-20 19:16:22,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:22,648 INFO L225 Difference]: With dead ends: 60 [2022-03-20 19:16:22,648 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 19:16:22,648 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2811, Invalid=5379, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 19:16:22,650 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:22,650 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:22,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 19:16:22,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-20 19:16:22,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:22,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2022-03-20 19:16:22,653 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2022-03-20 19:16:22,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:22,654 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2022-03-20 19:16:22,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.0425531914893618) 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) [2022-03-20 19:16:22,654 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2022-03-20 19:16:22,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 19:16:22,654 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:22,654 INFO L499 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:22,654 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-03-20 19:16:22,654 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:22,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:22,654 INFO L85 PathProgramCache]: Analyzing trace with hash 2043480408, now seen corresponding path program 42 times [2022-03-20 19:16:22,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:22,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1861783258] [2022-03-20 19:16:22,752 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:22,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1842684569, now seen corresponding path program 1 times [2022-03-20 19:16:22,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:22,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88336411] [2022-03-20 19:16:22,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:22,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:22,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:22,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:22,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88336411] [2022-03-20 19:16:22,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88336411] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:22,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:22,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:23,497 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:23,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1861783258] [2022-03-20 19:16:23,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1861783258] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:23,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:23,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-20 19:16:23,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226032908] [2022-03-20 19:16:23,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:23,497 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 19:16:23,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:23,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 19:16:23,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=1302, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 19:16:23,498 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 48 states, 48 states have (on average 1.0416666666666667) 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) [2022-03-20 19:16:24,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:24,131 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2022-03-20 19:16:24,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 19:16:24,131 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0416666666666667) 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 [2022-03-20 19:16:24,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:24,132 INFO L225 Difference]: With dead ends: 61 [2022-03-20 19:16:24,132 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 19:16:24,133 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2942, Invalid=5614, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 19:16:24,133 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:24,133 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:24,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 19:16:24,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-20 19:16:24,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:24,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2022-03-20 19:16:24,144 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2022-03-20 19:16:24,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:24,144 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2022-03-20 19:16:24,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.0416666666666667) 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) [2022-03-20 19:16:24,145 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2022-03-20 19:16:24,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 19:16:24,145 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:24,145 INFO L499 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:24,145 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-03-20 19:16:24,145 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:24,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:24,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1041227962, now seen corresponding path program 43 times [2022-03-20 19:16:24,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:24,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1976511140] [2022-03-20 19:16:24,245 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:24,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1783579225, now seen corresponding path program 1 times [2022-03-20 19:16:24,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:24,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157381431] [2022-03-20 19:16:24,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:24,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:24,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:24,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:24,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157381431] [2022-03-20 19:16:24,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157381431] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:24,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:24,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:24,933 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:24,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1976511140] [2022-03-20 19:16:24,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1976511140] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:24,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:24,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 19:16:24,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14327568] [2022-03-20 19:16:24,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:24,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 19:16:24,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:24,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 19:16:24,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=998, Invalid=1354, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 19:16:24,935 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 49 states, 49 states have (on average 1.0408163265306123) 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) [2022-03-20 19:16:25,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:25,636 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-03-20 19:16:25,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 19:16:25,636 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0408163265306123) 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 [2022-03-20 19:16:25,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:25,637 INFO L225 Difference]: With dead ends: 62 [2022-03-20 19:16:25,637 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 19:16:25,638 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3076, Invalid=5854, Unknown=0, NotChecked=0, Total=8930 [2022-03-20 19:16:25,639 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:25,639 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:25,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 19:16:25,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-20 19:16:25,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:25,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-03-20 19:16:25,641 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2022-03-20 19:16:25,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:25,642 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-03-20 19:16:25,642 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0408163265306123) 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) [2022-03-20 19:16:25,642 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-03-20 19:16:25,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 19:16:25,642 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:25,642 INFO L499 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:25,642 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-03-20 19:16:25,642 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:25,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:25,642 INFO L85 PathProgramCache]: Analyzing trace with hash 2117060376, now seen corresponding path program 44 times [2022-03-20 19:16:25,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:25,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [489383050] [2022-03-20 19:16:25,740 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:25,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1724473881, now seen corresponding path program 1 times [2022-03-20 19:16:25,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:25,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813849522] [2022-03-20 19:16:25,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:25,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:25,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:25,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:25,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813849522] [2022-03-20 19:16:25,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813849522] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:25,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:25,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:26,649 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:26,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [489383050] [2022-03-20 19:16:26,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [489383050] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:26,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:26,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-20 19:16:26,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569848923] [2022-03-20 19:16:26,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:26,649 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 19:16:26,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:26,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 19:16:26,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1043, Invalid=1407, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 19:16:26,650 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 50 states, 50 states have (on average 1.04) 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) [2022-03-20 19:16:27,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:27,391 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2022-03-20 19:16:27,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 19:16:27,392 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.04) 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 [2022-03-20 19:16:27,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:27,392 INFO L225 Difference]: With dead ends: 63 [2022-03-20 19:16:27,392 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 19:16:27,393 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3213, Invalid=6099, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 19:16:27,398 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:27,398 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:27,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 19:16:27,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-03-20 19:16:27,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:27,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2022-03-20 19:16:27,401 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2022-03-20 19:16:27,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:27,402 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2022-03-20 19:16:27,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.04) 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) [2022-03-20 19:16:27,402 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2022-03-20 19:16:27,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 19:16:27,403 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:27,403 INFO L499 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:27,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-03-20 19:16:27,403 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:27,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:27,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1239751046, now seen corresponding path program 45 times [2022-03-20 19:16:27,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:27,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1403979775] [2022-03-20 19:16:27,454 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:27,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1665368537, now seen corresponding path program 1 times [2022-03-20 19:16:27,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:27,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31863208] [2022-03-20 19:16:27,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:27,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:27,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:27,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:27,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31863208] [2022-03-20 19:16:27,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31863208] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:27,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:27,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:28,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:28,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1403979775] [2022-03-20 19:16:28,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1403979775] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:28,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:28,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 19:16:28,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747365273] [2022-03-20 19:16:28,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:28,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 19:16:28,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:28,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 19:16:28,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1089, Invalid=1461, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 19:16:28,041 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 51 states, 51 states have (on average 1.0392156862745099) 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) [2022-03-20 19:16:28,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:28,806 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-03-20 19:16:28,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 19:16:28,807 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0392156862745099) 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 [2022-03-20 19:16:28,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:28,811 INFO L225 Difference]: With dead ends: 64 [2022-03-20 19:16:28,811 INFO L226 Difference]: Without dead ends: 59 [2022-03-20 19:16:28,813 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3353, Invalid=6349, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 19:16:28,814 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:28,814 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:28,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-20 19:16:28,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-03-20 19:16:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:28,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-03-20 19:16:28,836 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2022-03-20 19:16:28,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:28,836 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-03-20 19:16:28,836 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.0392156862745099) 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) [2022-03-20 19:16:28,837 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-03-20 19:16:28,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 19:16:28,837 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:28,837 INFO L499 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:28,837 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-03-20 19:16:28,837 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:28,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:28,837 INFO L85 PathProgramCache]: Analyzing trace with hash -187034408, now seen corresponding path program 46 times [2022-03-20 19:16:28,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:28,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1316276424] [2022-03-20 19:16:28,924 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:28,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1606263193, now seen corresponding path program 1 times [2022-03-20 19:16:28,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:28,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221802485] [2022-03-20 19:16:28,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:28,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:28,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:28,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:28,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221802485] [2022-03-20 19:16:28,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221802485] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:28,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:28,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:29,743 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:29,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1316276424] [2022-03-20 19:16:29,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1316276424] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:29,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:29,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-20 19:16:29,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379111752] [2022-03-20 19:16:29,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:29,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-20 19:16:29,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:29,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-20 19:16:29,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1136, Invalid=1516, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 19:16:29,745 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 52 states, 52 states have (on average 1.0384615384615385) 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) [2022-03-20 19:16:30,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:30,894 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2022-03-20 19:16:30,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 19:16:30,894 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0384615384615385) 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 [2022-03-20 19:16:30,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:30,895 INFO L225 Difference]: With dead ends: 65 [2022-03-20 19:16:30,895 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 19:16:30,895 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3496, Invalid=6604, Unknown=0, NotChecked=0, Total=10100 [2022-03-20 19:16:30,896 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:30,896 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:30,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 19:16:30,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-03-20 19:16:30,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:30,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2022-03-20 19:16:30,899 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2022-03-20 19:16:30,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:30,899 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2022-03-20 19:16:30,899 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.0384615384615385) 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) [2022-03-20 19:16:30,899 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2022-03-20 19:16:30,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 19:16:30,899 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:30,899 INFO L499 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:30,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-03-20 19:16:30,899 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:30,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:30,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1467710522, now seen corresponding path program 47 times [2022-03-20 19:16:30,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:30,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1485619629] [2022-03-20 19:16:30,983 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:30,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1547157849, now seen corresponding path program 1 times [2022-03-20 19:16:30,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:30,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011486847] [2022-03-20 19:16:30,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:30,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:31,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:31,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:31,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011486847] [2022-03-20 19:16:31,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011486847] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:31,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:31,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:31,874 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:31,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1485619629] [2022-03-20 19:16:31,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1485619629] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:31,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:31,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 19:16:31,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127763349] [2022-03-20 19:16:31,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:31,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 19:16:31,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:31,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 19:16:31,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1184, Invalid=1572, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 19:16:31,875 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 53 states, 53 states have (on average 1.0377358490566038) 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) [2022-03-20 19:16:32,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:32,655 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2022-03-20 19:16:32,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 19:16:32,655 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0377358490566038) 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 [2022-03-20 19:16:32,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:32,656 INFO L225 Difference]: With dead ends: 66 [2022-03-20 19:16:32,656 INFO L226 Difference]: Without dead ends: 61 [2022-03-20 19:16:32,657 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3642, Invalid=6864, Unknown=0, NotChecked=0, Total=10506 [2022-03-20 19:16:32,657 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:32,658 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:32,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-20 19:16:32,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-20 19:16:32,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:32,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2022-03-20 19:16:32,661 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2022-03-20 19:16:32,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:32,661 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2022-03-20 19:16:32,661 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0377358490566038) 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) [2022-03-20 19:16:32,661 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2022-03-20 19:16:32,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 19:16:32,661 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:32,662 INFO L499 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:32,662 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-03-20 19:16:32,662 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:32,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:32,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1781002904, now seen corresponding path program 48 times [2022-03-20 19:16:32,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:32,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1297233300] [2022-03-20 19:16:32,742 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:32,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1488052505, now seen corresponding path program 1 times [2022-03-20 19:16:32,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:32,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986307056] [2022-03-20 19:16:32,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:32,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:32,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:32,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:32,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986307056] [2022-03-20 19:16:32,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986307056] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:32,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:32,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:33,403 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:33,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1297233300] [2022-03-20 19:16:33,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1297233300] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:33,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:33,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-20 19:16:33,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941955368] [2022-03-20 19:16:33,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:33,404 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 19:16:33,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:33,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 19:16:33,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1233, Invalid=1629, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 19:16:33,405 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 54 states, 54 states have (on average 1.037037037037037) 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) [2022-03-20 19:16:34,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:34,537 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2022-03-20 19:16:34,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 19:16:34,537 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.037037037037037) 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 [2022-03-20 19:16:34,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:34,538 INFO L225 Difference]: With dead ends: 67 [2022-03-20 19:16:34,538 INFO L226 Difference]: Without dead ends: 62 [2022-03-20 19:16:34,539 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3791, Invalid=7129, Unknown=0, NotChecked=0, Total=10920 [2022-03-20 19:16:34,540 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:34,540 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:34,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-20 19:16:34,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-03-20 19:16:34,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:34,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2022-03-20 19:16:34,543 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2022-03-20 19:16:34,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:34,543 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2022-03-20 19:16:34,543 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.037037037037037) 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) [2022-03-20 19:16:34,543 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2022-03-20 19:16:34,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 19:16:34,543 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:34,543 INFO L499 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:34,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-03-20 19:16:34,544 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:34,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:34,544 INFO L85 PathProgramCache]: Analyzing trace with hash -588095994, now seen corresponding path program 49 times [2022-03-20 19:16:34,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:34,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2001287529] [2022-03-20 19:16:34,641 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:34,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1428947161, now seen corresponding path program 1 times [2022-03-20 19:16:34,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:34,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935987060] [2022-03-20 19:16:34,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:34,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:34,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:34,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:34,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935987060] [2022-03-20 19:16:34,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935987060] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:34,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:34,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:35,391 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:35,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2001287529] [2022-03-20 19:16:35,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2001287529] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:35,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:35,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-20 19:16:35,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802748584] [2022-03-20 19:16:35,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:35,392 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-20 19:16:35,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:35,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-20 19:16:35,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1283, Invalid=1687, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 19:16:35,392 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 55 states, 55 states have (on average 1.0363636363636364) 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) [2022-03-20 19:16:36,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:36,195 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-03-20 19:16:36,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 19:16:36,195 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0363636363636364) 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 [2022-03-20 19:16:36,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:36,195 INFO L225 Difference]: With dead ends: 68 [2022-03-20 19:16:36,195 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 19:16:36,197 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3943, Invalid=7399, Unknown=0, NotChecked=0, Total=11342 [2022-03-20 19:16:36,197 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:36,198 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:36,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 19:16:36,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-03-20 19:16:36,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:36,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2022-03-20 19:16:36,203 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2022-03-20 19:16:36,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:36,203 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2022-03-20 19:16:36,203 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.0363636363636364) 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) [2022-03-20 19:16:36,203 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2022-03-20 19:16:36,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 19:16:36,203 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:36,203 INFO L499 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:36,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-03-20 19:16:36,203 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:36,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:36,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1015717800, now seen corresponding path program 50 times [2022-03-20 19:16:36,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:36,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [284168106] [2022-03-20 19:16:36,296 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:36,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1369841817, now seen corresponding path program 1 times [2022-03-20 19:16:36,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:36,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726455866] [2022-03-20 19:16:36,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:36,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:36,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:36,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:36,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726455866] [2022-03-20 19:16:36,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726455866] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:36,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:36,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:37,213 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:37,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [284168106] [2022-03-20 19:16:37,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [284168106] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:37,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:37,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-20 19:16:37,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271579605] [2022-03-20 19:16:37,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:37,214 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-20 19:16:37,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:37,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-20 19:16:37,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1334, Invalid=1746, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 19:16:37,215 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 56 states, 56 states have (on average 1.0357142857142858) 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) [2022-03-20 19:16:38,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:38,396 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2022-03-20 19:16:38,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 19:16:38,396 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0357142857142858) 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 [2022-03-20 19:16:38,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:38,397 INFO L225 Difference]: With dead ends: 69 [2022-03-20 19:16:38,397 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 19:16:38,398 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1475 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4098, Invalid=7674, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 19:16:38,398 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:38,399 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:38,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 19:16:38,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-03-20 19:16:38,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:38,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2022-03-20 19:16:38,401 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2022-03-20 19:16:38,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:38,402 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2022-03-20 19:16:38,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.0357142857142858) 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) [2022-03-20 19:16:38,402 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2022-03-20 19:16:38,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 19:16:38,402 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:38,402 INFO L499 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:38,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-03-20 19:16:38,403 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:38,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:38,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1387091898, now seen corresponding path program 51 times [2022-03-20 19:16:38,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:38,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1447102279] [2022-03-20 19:16:38,520 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:38,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1310736473, now seen corresponding path program 1 times [2022-03-20 19:16:38,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:38,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493880537] [2022-03-20 19:16:38,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:38,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:38,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:38,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:38,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493880537] [2022-03-20 19:16:38,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493880537] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:38,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:38,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:39,268 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:39,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1447102279] [2022-03-20 19:16:39,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1447102279] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:39,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:39,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-20 19:16:39,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590755744] [2022-03-20 19:16:39,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:39,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-20 19:16:39,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:39,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-20 19:16:39,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1386, Invalid=1806, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 19:16:39,269 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 57 states, 57 states have (on average 1.0350877192982457) 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) [2022-03-20 19:16:40,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:40,132 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-03-20 19:16:40,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 19:16:40,133 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0350877192982457) 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 [2022-03-20 19:16:40,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:40,133 INFO L225 Difference]: With dead ends: 70 [2022-03-20 19:16:40,133 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 19:16:40,135 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4256, Invalid=7954, Unknown=0, NotChecked=0, Total=12210 [2022-03-20 19:16:40,135 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:40,135 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:40,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 19:16:40,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-20 19:16:40,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:40,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2022-03-20 19:16:40,138 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2022-03-20 19:16:40,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:40,138 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2022-03-20 19:16:40,138 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.0350877192982457) 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) [2022-03-20 19:16:40,138 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2022-03-20 19:16:40,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 19:16:40,138 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:40,138 INFO L499 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:40,138 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-03-20 19:16:40,138 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:40,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:40,139 INFO L85 PathProgramCache]: Analyzing trace with hash -14787048, now seen corresponding path program 52 times [2022-03-20 19:16:40,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:40,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [647438596] [2022-03-20 19:16:40,245 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:40,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1251631129, now seen corresponding path program 1 times [2022-03-20 19:16:40,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:40,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3785862] [2022-03-20 19:16:40,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:40,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:40,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:40,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:40,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3785862] [2022-03-20 19:16:40,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3785862] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:40,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:40,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:41,024 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:41,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [647438596] [2022-03-20 19:16:41,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [647438596] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:41,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:41,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-20 19:16:41,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524264226] [2022-03-20 19:16:41,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:41,025 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-20 19:16:41,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:41,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-20 19:16:41,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1439, Invalid=1867, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 19:16:41,026 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 58 states, 58 states have (on average 1.0344827586206897) 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) [2022-03-20 19:16:41,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:41,974 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2022-03-20 19:16:41,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 19:16:41,975 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0344827586206897) 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 [2022-03-20 19:16:41,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:41,975 INFO L225 Difference]: With dead ends: 71 [2022-03-20 19:16:41,975 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 19:16:41,977 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4417, Invalid=8239, Unknown=0, NotChecked=0, Total=12656 [2022-03-20 19:16:41,977 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:41,977 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:41,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 19:16:41,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-03-20 19:16:41,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:41,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2022-03-20 19:16:41,980 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2022-03-20 19:16:41,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:41,981 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2022-03-20 19:16:41,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.0344827586206897) 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) [2022-03-20 19:16:41,981 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2022-03-20 19:16:41,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 19:16:41,981 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:41,981 INFO L499 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:41,981 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-03-20 19:16:41,981 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:41,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:41,981 INFO L85 PathProgramCache]: Analyzing trace with hash -423009658, now seen corresponding path program 53 times [2022-03-20 19:16:41,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:41,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1869377246] [2022-03-20 19:16:42,075 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:42,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1192525785, now seen corresponding path program 1 times [2022-03-20 19:16:42,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:42,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826344360] [2022-03-20 19:16:42,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:42,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:42,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:42,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:42,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826344360] [2022-03-20 19:16:42,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826344360] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:42,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:42,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:42,845 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:42,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1869377246] [2022-03-20 19:16:42,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1869377246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:42,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:42,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-20 19:16:42,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152705103] [2022-03-20 19:16:42,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:42,846 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-20 19:16:42,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:42,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-20 19:16:42,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1493, Invalid=1929, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 19:16:42,847 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 59 states, 59 states have (on average 1.0338983050847457) 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) [2022-03-20 19:16:44,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:44,145 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2022-03-20 19:16:44,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-20 19:16:44,145 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0338983050847457) 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 [2022-03-20 19:16:44,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:44,146 INFO L225 Difference]: With dead ends: 72 [2022-03-20 19:16:44,146 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 19:16:44,148 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4581, Invalid=8529, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 19:16:44,148 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:44,148 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:44,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 19:16:44,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-20 19:16:44,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:44,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2022-03-20 19:16:44,151 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2022-03-20 19:16:44,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:44,152 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2022-03-20 19:16:44,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.0338983050847457) 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) [2022-03-20 19:16:44,152 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2022-03-20 19:16:44,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 19:16:44,152 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:44,152 INFO L499 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:44,152 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-03-20 19:16:44,152 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:44,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:44,152 INFO L85 PathProgramCache]: Analyzing trace with hash -193008680, now seen corresponding path program 54 times [2022-03-20 19:16:44,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:44,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [879733052] [2022-03-20 19:16:44,240 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:44,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1133420441, now seen corresponding path program 1 times [2022-03-20 19:16:44,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:44,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507870186] [2022-03-20 19:16:44,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:44,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:44,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:44,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:44,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507870186] [2022-03-20 19:16:44,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507870186] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:44,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:44,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:45,089 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:45,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [879733052] [2022-03-20 19:16:45,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [879733052] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:45,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:45,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-20 19:16:45,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722924298] [2022-03-20 19:16:45,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:45,097 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-20 19:16:45,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:45,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-20 19:16:45,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1548, Invalid=1992, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 19:16:45,098 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 60 states, 60 states have (on average 1.0333333333333334) 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) [2022-03-20 19:16:46,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:46,096 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2022-03-20 19:16:46,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 19:16:46,097 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.0333333333333334) 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 [2022-03-20 19:16:46,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:46,097 INFO L225 Difference]: With dead ends: 73 [2022-03-20 19:16:46,097 INFO L226 Difference]: Without dead ends: 68 [2022-03-20 19:16:46,099 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1701 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4748, Invalid=8824, Unknown=0, NotChecked=0, Total=13572 [2022-03-20 19:16:46,099 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:46,099 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 67 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:46,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-20 19:16:46,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-03-20 19:16:46,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:46,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2022-03-20 19:16:46,102 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2022-03-20 19:16:46,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:46,103 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2022-03-20 19:16:46,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.0333333333333334) 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) [2022-03-20 19:16:46,103 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2022-03-20 19:16:46,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 19:16:46,103 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:46,103 INFO L499 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:46,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-03-20 19:16:46,103 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:46,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:46,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1652912954, now seen corresponding path program 55 times [2022-03-20 19:16:46,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:46,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [166161020] [2022-03-20 19:16:46,231 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:46,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1074315097, now seen corresponding path program 1 times [2022-03-20 19:16:46,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:46,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877854550] [2022-03-20 19:16:46,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:46,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:46,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:46,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:46,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877854550] [2022-03-20 19:16:46,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877854550] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:46,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:46,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:47,568 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:47,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [166161020] [2022-03-20 19:16:47,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [166161020] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:47,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:47,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-20 19:16:47,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431501600] [2022-03-20 19:16:47,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:47,569 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-20 19:16:47,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:47,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-20 19:16:47,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1604, Invalid=2056, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 19:16:47,570 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 61 states, 61 states have (on average 1.0327868852459017) 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) [2022-03-20 19:16:49,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:49,108 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-03-20 19:16:49,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 19:16:49,108 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.0327868852459017) 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 [2022-03-20 19:16:49,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:49,109 INFO L225 Difference]: With dead ends: 74 [2022-03-20 19:16:49,109 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 19:16:49,109 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1760 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4918, Invalid=9124, Unknown=0, NotChecked=0, Total=14042 [2022-03-20 19:16:49,110 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:49,110 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:49,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 19:16:49,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-03-20 19:16:49,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:49,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2022-03-20 19:16:49,113 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2022-03-20 19:16:49,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:49,113 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2022-03-20 19:16:49,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.0327868852459017) 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) [2022-03-20 19:16:49,113 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2022-03-20 19:16:49,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 19:16:49,113 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:49,113 INFO L499 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:49,113 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-03-20 19:16:49,113 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:49,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:49,114 INFO L85 PathProgramCache]: Analyzing trace with hash 334694808, now seen corresponding path program 56 times [2022-03-20 19:16:49,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:49,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2027555197] [2022-03-20 19:16:49,262 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:49,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1015209753, now seen corresponding path program 1 times [2022-03-20 19:16:49,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:49,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658478036] [2022-03-20 19:16:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:49,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:49,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:49,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:49,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:49,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658478036] [2022-03-20 19:16:49,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658478036] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:49,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:49,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:50,380 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:50,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2027555197] [2022-03-20 19:16:50,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2027555197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:50,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:50,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-20 19:16:50,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111580303] [2022-03-20 19:16:50,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:50,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-20 19:16:50,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:50,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-20 19:16:50,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1661, Invalid=2121, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 19:16:50,382 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 62 states, 62 states have (on average 1.032258064516129) 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) [2022-03-20 19:16:51,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:51,423 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2022-03-20 19:16:51,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-20 19:16:51,424 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.032258064516129) 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 [2022-03-20 19:16:51,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:51,424 INFO L225 Difference]: With dead ends: 75 [2022-03-20 19:16:51,424 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 19:16:51,425 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5091, Invalid=9429, Unknown=0, NotChecked=0, Total=14520 [2022-03-20 19:16:51,425 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:51,425 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:51,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 19:16:51,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-20 19:16:51,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2022-03-20 19:16:51,428 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2022-03-20 19:16:51,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:51,428 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2022-03-20 19:16:51,429 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.032258064516129) 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) [2022-03-20 19:16:51,429 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2022-03-20 19:16:51,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 19:16:51,429 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:51,429 INFO L499 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:51,429 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-03-20 19:16:51,429 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:51,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:51,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1820993286, now seen corresponding path program 57 times [2022-03-20 19:16:51,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:51,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1647150248] [2022-03-20 19:16:51,541 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:51,541 INFO L85 PathProgramCache]: Analyzing trace with hash -956104409, now seen corresponding path program 1 times [2022-03-20 19:16:51,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:51,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650530699] [2022-03-20 19:16:51,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:51,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:51,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:51,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:51,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650530699] [2022-03-20 19:16:51,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650530699] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:51,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:51,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:52,439 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:52,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1647150248] [2022-03-20 19:16:52,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1647150248] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:52,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:52,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-20 19:16:52,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944310332] [2022-03-20 19:16:52,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:52,439 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-20 19:16:52,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:52,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-20 19:16:52,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1719, Invalid=2187, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 19:16:52,441 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 63 states, 63 states have (on average 1.0317460317460319) 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) [2022-03-20 19:16:53,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:53,632 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2022-03-20 19:16:53,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 19:16:53,632 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0317460317460319) 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 [2022-03-20 19:16:53,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:53,633 INFO L225 Difference]: With dead ends: 76 [2022-03-20 19:16:53,633 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 19:16:53,634 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1881 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5267, Invalid=9739, Unknown=0, NotChecked=0, Total=15006 [2022-03-20 19:16:53,634 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:53,634 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:53,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 19:16:53,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-20 19:16:53,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:53,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2022-03-20 19:16:53,638 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2022-03-20 19:16:53,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:53,638 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2022-03-20 19:16:53,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0317460317460319) 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) [2022-03-20 19:16:53,638 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2022-03-20 19:16:53,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-20 19:16:53,638 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:53,638 INFO L499 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:53,638 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-03-20 19:16:53,638 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:53,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:53,639 INFO L85 PathProgramCache]: Analyzing trace with hash 651605848, now seen corresponding path program 58 times [2022-03-20 19:16:53,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:53,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [615648918] [2022-03-20 19:16:53,732 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:53,732 INFO L85 PathProgramCache]: Analyzing trace with hash -896999065, now seen corresponding path program 1 times [2022-03-20 19:16:53,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:53,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805556320] [2022-03-20 19:16:53,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:53,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:53,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:53,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:53,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805556320] [2022-03-20 19:16:53,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805556320] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:53,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:53,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:54,630 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:54,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [615648918] [2022-03-20 19:16:54,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [615648918] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:54,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:54,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-20 19:16:54,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541941470] [2022-03-20 19:16:54,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:54,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-20 19:16:54,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:54,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-20 19:16:54,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1778, Invalid=2254, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 19:16:54,632 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 64 states, 64 states have (on average 1.03125) 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) [2022-03-20 19:16:55,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:55,712 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2022-03-20 19:16:55,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 19:16:55,712 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.03125) 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 [2022-03-20 19:16:55,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:55,713 INFO L225 Difference]: With dead ends: 77 [2022-03-20 19:16:55,713 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 19:16:55,714 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1943 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5446, Invalid=10054, Unknown=0, NotChecked=0, Total=15500 [2022-03-20 19:16:55,715 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:55,715 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:55,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 19:16:55,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-03-20 19:16:55,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:55,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2022-03-20 19:16:55,718 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2022-03-20 19:16:55,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:55,718 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2022-03-20 19:16:55,719 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.03125) 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) [2022-03-20 19:16:55,719 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2022-03-20 19:16:55,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 19:16:55,719 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:55,719 INFO L499 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:55,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-03-20 19:16:55,719 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:55,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:55,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1239666362, now seen corresponding path program 59 times [2022-03-20 19:16:55,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:55,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [934143766] [2022-03-20 19:16:55,801 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:55,801 INFO L85 PathProgramCache]: Analyzing trace with hash -837893721, now seen corresponding path program 1 times [2022-03-20 19:16:55,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:55,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050990805] [2022-03-20 19:16:55,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:55,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:55,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:55,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:55,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050990805] [2022-03-20 19:16:55,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050990805] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:55,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:55,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:56,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:56,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [934143766] [2022-03-20 19:16:56,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [934143766] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:56,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:56,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-20 19:16:56,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857342958] [2022-03-20 19:16:56,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:56,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-20 19:16:56,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:56,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-20 19:16:56,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1838, Invalid=2322, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 19:16:56,859 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 65 states, 65 states have (on average 1.0307692307692307) 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) [2022-03-20 19:16:57,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:57,995 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-03-20 19:16:57,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 19:16:57,995 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0307692307692307) 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 [2022-03-20 19:16:57,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:57,996 INFO L225 Difference]: With dead ends: 78 [2022-03-20 19:16:57,996 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 19:16:57,998 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5628, Invalid=10374, Unknown=0, NotChecked=0, Total=16002 [2022-03-20 19:16:57,998 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:57,998 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:57,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 19:16:58,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-20 19:16:58,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:16:58,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2022-03-20 19:16:58,001 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2022-03-20 19:16:58,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:58,002 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2022-03-20 19:16:58,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0307692307692307) 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) [2022-03-20 19:16:58,003 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2022-03-20 19:16:58,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 19:16:58,003 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:58,003 INFO L499 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:58,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-03-20 19:16:58,003 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:58,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:58,003 INFO L85 PathProgramCache]: Analyzing trace with hash 260437272, now seen corresponding path program 60 times [2022-03-20 19:16:58,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:58,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1614127390] [2022-03-20 19:16:58,085 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:16:58,085 INFO L85 PathProgramCache]: Analyzing trace with hash -778788377, now seen corresponding path program 1 times [2022-03-20 19:16:58,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:58,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744013897] [2022-03-20 19:16:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:58,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:58,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:16:58,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:58,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744013897] [2022-03-20 19:16:58,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744013897] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:58,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:58,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:16:59,016 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:59,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1614127390] [2022-03-20 19:16:59,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1614127390] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:59,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:59,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-20 19:16:59,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930256384] [2022-03-20 19:16:59,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:59,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-20 19:16:59,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:59,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-20 19:16:59,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1899, Invalid=2391, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 19:16:59,018 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 66 states, 66 states have (on average 1.0303030303030303) 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) [2022-03-20 19:17:00,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:17:00,586 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2022-03-20 19:17:00,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-20 19:17:00,587 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0303030303030303) 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 [2022-03-20 19:17:00,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:17:00,587 INFO L225 Difference]: With dead ends: 79 [2022-03-20 19:17:00,587 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 19:17:00,588 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5813, Invalid=10699, Unknown=0, NotChecked=0, Total=16512 [2022-03-20 19:17:00,588 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:17:00,589 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:17:00,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 19:17:00,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-20 19:17:00,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:17:00,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2022-03-20 19:17:00,592 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2022-03-20 19:17:00,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:17:00,592 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2022-03-20 19:17:00,592 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.0303030303030303) 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) [2022-03-20 19:17:00,592 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2022-03-20 19:17:00,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 19:17:00,592 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:17:00,592 INFO L499 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:17:00,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-03-20 19:17:00,592 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:17:00,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:17:00,593 INFO L85 PathProgramCache]: Analyzing trace with hash -480990330, now seen corresponding path program 61 times [2022-03-20 19:17:00,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:00,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1232037174] [2022-03-20 19:17:00,719 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:17:00,719 INFO L85 PathProgramCache]: Analyzing trace with hash -719683033, now seen corresponding path program 1 times [2022-03-20 19:17:00,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:17:00,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689702490] [2022-03-20 19:17:00,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:17:00,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:17:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:00,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:17:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:00,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:17:00,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:17:00,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689702490] [2022-03-20 19:17:00,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689702490] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:00,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:00,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:17:02,019 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:17:02,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1232037174] [2022-03-20 19:17:02,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1232037174] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:02,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:02,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-20 19:17:02,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917265550] [2022-03-20 19:17:02,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:17:02,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-20 19:17:02,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:02,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-20 19:17:02,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=2461, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 19:17:02,030 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 67 states, 67 states have (on average 1.0298507462686568) 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) [2022-03-20 19:17:03,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:17:03,240 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-03-20 19:17:03,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-20 19:17:03,240 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0298507462686568) 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 [2022-03-20 19:17:03,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:17:03,240 INFO L225 Difference]: With dead ends: 80 [2022-03-20 19:17:03,240 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 19:17:03,242 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2135 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6001, Invalid=11029, Unknown=0, NotChecked=0, Total=17030 [2022-03-20 19:17:03,242 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:17:03,242 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:17:03,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 19:17:03,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-03-20 19:17:03,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:17:03,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2022-03-20 19:17:03,266 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2022-03-20 19:17:03,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:17:03,266 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2022-03-20 19:17:03,267 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.0298507462686568) 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) [2022-03-20 19:17:03,267 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2022-03-20 19:17:03,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 19:17:03,267 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:17:03,268 INFO L499 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:17:03,268 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-03-20 19:17:03,268 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:17:03,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:17:03,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1990409512, now seen corresponding path program 62 times [2022-03-20 19:17:03,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:03,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [728303162] [2022-03-20 19:17:03,355 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:17:03,356 INFO L85 PathProgramCache]: Analyzing trace with hash -660577689, now seen corresponding path program 1 times [2022-03-20 19:17:03,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:17:03,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093266242] [2022-03-20 19:17:03,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:17:03,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:17:03,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:03,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:17:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:03,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:17:03,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:17:03,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093266242] [2022-03-20 19:17:03,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093266242] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:03,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:03,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:17:04,931 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:17:04,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [728303162] [2022-03-20 19:17:04,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [728303162] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:04,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:04,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-20 19:17:04,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737232327] [2022-03-20 19:17:04,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:17:04,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-20 19:17:04,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:04,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-20 19:17:04,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2024, Invalid=2532, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 19:17:04,933 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 68 states, 68 states have (on average 1.0294117647058822) 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) [2022-03-20 19:17:06,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:17:06,223 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2022-03-20 19:17:06,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 19:17:06,224 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0294117647058822) 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 [2022-03-20 19:17:06,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:17:06,226 INFO L225 Difference]: With dead ends: 81 [2022-03-20 19:17:06,226 INFO L226 Difference]: Without dead ends: 76 [2022-03-20 19:17:06,228 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2201 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6192, Invalid=11364, Unknown=0, NotChecked=0, Total=17556 [2022-03-20 19:17:06,228 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:17:06,229 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:17:06,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-20 19:17:06,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-03-20 19:17:06,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:17:06,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2022-03-20 19:17:06,234 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2022-03-20 19:17:06,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:17:06,234 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2022-03-20 19:17:06,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.0294117647058822) 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) [2022-03-20 19:17:06,235 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2022-03-20 19:17:06,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 19:17:06,235 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:17:06,235 INFO L499 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:17:06,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-03-20 19:17:06,235 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:17:06,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:17:06,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1537763898, now seen corresponding path program 63 times [2022-03-20 19:17:06,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:06,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [539095268] [2022-03-20 19:17:06,390 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:17:06,390 INFO L85 PathProgramCache]: Analyzing trace with hash -601472345, now seen corresponding path program 1 times [2022-03-20 19:17:06,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:17:06,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641881679] [2022-03-20 19:17:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:17:06,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:17:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:06,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:17:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:17:06,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:17:06,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641881679] [2022-03-20 19:17:06,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641881679] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:06,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:06,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:17:07,709 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:17:07,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [539095268] [2022-03-20 19:17:07,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [539095268] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:07,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:07,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-20 19:17:07,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729179801] [2022-03-20 19:17:07,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:17:07,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-20 19:17:07,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:07,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-20 19:17:07,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2088, Invalid=2604, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 19:17:07,715 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 69 states, 69 states have (on average 1.0289855072463767) 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) [2022-03-20 19:17:08,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:17:08,982 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2022-03-20 19:17:08,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 19:17:08,983 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0289855072463767) 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 [2022-03-20 19:17:08,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:17:08,996 INFO L225 Difference]: With dead ends: 82 [2022-03-20 19:17:08,996 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 19:17:08,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6386, Invalid=11704, Unknown=0, NotChecked=0, Total=18090 [2022-03-20 19:17:08,997 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:17:09,015 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:17:09,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 19:17:09,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-03-20 19:17:09,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:17:09,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2022-03-20 19:17:09,020 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2022-03-20 19:17:09,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:17:09,020 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2022-03-20 19:17:09,020 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0289855072463767) 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) [2022-03-20 19:17:09,020 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2022-03-20 19:17:09,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-20 19:17:09,020 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:17:09,020 INFO L499 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:17:09,021 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-03-20 19:17:09,021 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:17:09,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:17:09,021 INFO L85 PathProgramCache]: Analyzing trace with hash -390651752, now seen corresponding path program 64 times [2022-03-20 19:17:09,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:09,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [156243145] [2022-03-20 19:17:09,198 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:17:09,198 INFO L85 PathProgramCache]: Analyzing trace with hash -542367001, now seen corresponding path program 1 times [2022-03-20 19:17:09,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:17:09,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062712578] [2022-03-20 19:17:09,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:17:09,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:17:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:09,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:17:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:17:09,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:17:09,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062712578] [2022-03-20 19:17:09,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062712578] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:09,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:09,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:17:10,890 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:17:10,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [156243145] [2022-03-20 19:17:10,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [156243145] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:10,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:10,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-20 19:17:10,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458274638] [2022-03-20 19:17:10,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:17:10,890 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-20 19:17:10,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:10,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-20 19:17:10,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2153, Invalid=2677, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 19:17:10,891 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 70 states, 70 states have (on average 1.0285714285714285) 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) [2022-03-20 19:17:12,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:17:12,910 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2022-03-20 19:17:12,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-20 19:17:12,910 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.0285714285714285) 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 [2022-03-20 19:17:12,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:17:12,911 INFO L225 Difference]: With dead ends: 83 [2022-03-20 19:17:12,911 INFO L226 Difference]: Without dead ends: 78 [2022-03-20 19:17:12,913 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2336 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=6583, Invalid=12049, Unknown=0, NotChecked=0, Total=18632 [2022-03-20 19:17:12,913 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:17:12,913 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 67 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:17:12,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-20 19:17:12,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-03-20 19:17:12,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:17:12,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2022-03-20 19:17:12,916 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2022-03-20 19:17:12,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:17:12,916 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2022-03-20 19:17:12,916 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.0285714285714285) 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) [2022-03-20 19:17:12,917 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2022-03-20 19:17:12,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 19:17:12,917 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:17:12,917 INFO L499 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:17:12,917 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-03-20 19:17:12,917 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:17:12,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:17:12,917 INFO L85 PathProgramCache]: Analyzing trace with hash 810086406, now seen corresponding path program 65 times [2022-03-20 19:17:12,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:12,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1844721515] [2022-03-20 19:17:13,049 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:17:13,049 INFO L85 PathProgramCache]: Analyzing trace with hash -483261657, now seen corresponding path program 1 times [2022-03-20 19:17:13,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:17:13,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663637695] [2022-03-20 19:17:13,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:17:13,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:17:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:13,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:17:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:17:13,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:17:13,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663637695] [2022-03-20 19:17:13,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663637695] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:13,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:13,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:17:14,255 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:17:14,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1844721515] [2022-03-20 19:17:14,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1844721515] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:14,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:14,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-20 19:17:14,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293029807] [2022-03-20 19:17:14,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:17:14,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-20 19:17:14,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:14,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-20 19:17:14,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2219, Invalid=2751, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 19:17:14,258 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 71 states, 71 states have (on average 1.028169014084507) 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) [2022-03-20 19:17:15,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:17:15,703 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2022-03-20 19:17:15,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-20 19:17:15,703 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.028169014084507) 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 [2022-03-20 19:17:15,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:17:15,704 INFO L225 Difference]: With dead ends: 84 [2022-03-20 19:17:15,704 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 19:17:15,705 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2405 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6783, Invalid=12399, Unknown=0, NotChecked=0, Total=19182 [2022-03-20 19:17:15,705 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:17:15,707 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:17:15,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 19:17:15,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-20 19:17:15,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:17:15,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2022-03-20 19:17:15,710 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2022-03-20 19:17:15,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:17:15,710 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2022-03-20 19:17:15,710 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.028169014084507) 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) [2022-03-20 19:17:15,710 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2022-03-20 19:17:15,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 19:17:15,710 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:17:15,710 INFO L499 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:17:15,710 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-03-20 19:17:15,711 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:17:15,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:17:15,711 INFO L85 PathProgramCache]: Analyzing trace with hash -621736360, now seen corresponding path program 66 times [2022-03-20 19:17:15,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:15,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [995270118] [2022-03-20 19:17:15,885 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:17:15,885 INFO L85 PathProgramCache]: Analyzing trace with hash -424156313, now seen corresponding path program 1 times [2022-03-20 19:17:15,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:17:15,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200257177] [2022-03-20 19:17:15,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:17:15,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:17:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:15,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:17:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:17:15,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:17:15,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200257177] [2022-03-20 19:17:15,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200257177] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:15,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:15,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:17:17,210 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:17:17,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [995270118] [2022-03-20 19:17:17,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [995270118] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:17,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:17,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-20 19:17:17,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336772397] [2022-03-20 19:17:17,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:17:17,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-20 19:17:17,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:17,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-20 19:17:17,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2286, Invalid=2826, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 19:17:17,212 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 72 states, 72 states have (on average 1.0277777777777777) 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) [2022-03-20 19:17:18,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:17:18,636 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2022-03-20 19:17:18,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-20 19:17:18,636 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0277777777777777) 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 [2022-03-20 19:17:18,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:17:18,648 INFO L225 Difference]: With dead ends: 85 [2022-03-20 19:17:18,648 INFO L226 Difference]: Without dead ends: 80 [2022-03-20 19:17:18,650 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6986, Invalid=12754, Unknown=0, NotChecked=0, Total=19740 [2022-03-20 19:17:18,651 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:17:18,652 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:17:18,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-20 19:17:18,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-03-20 19:17:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:17:18,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2022-03-20 19:17:18,656 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2022-03-20 19:17:18,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:17:18,657 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2022-03-20 19:17:18,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.0277777777777777) 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) [2022-03-20 19:17:18,657 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2022-03-20 19:17:18,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 19:17:18,657 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:17:18,657 INFO L499 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:17:18,657 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-03-20 19:17:18,657 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:17:18,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:17:18,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2058569146, now seen corresponding path program 67 times [2022-03-20 19:17:18,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:18,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [930256357] [2022-03-20 19:17:18,769 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:17:18,769 INFO L85 PathProgramCache]: Analyzing trace with hash -365050969, now seen corresponding path program 1 times [2022-03-20 19:17:18,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:17:18,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755152061] [2022-03-20 19:17:18,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:17:18,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:17:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:18,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:17:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:17:18,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:17:18,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755152061] [2022-03-20 19:17:18,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755152061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:18,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:18,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:17:20,618 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:17:20,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [930256357] [2022-03-20 19:17:20,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [930256357] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:20,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:20,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-20 19:17:20,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862133769] [2022-03-20 19:17:20,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:17:20,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-20 19:17:20,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:20,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-20 19:17:20,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2354, Invalid=2902, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 19:17:20,620 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand has 73 states, 73 states have (on average 1.0273972602739727) 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) [2022-03-20 19:17:22,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:17:22,751 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-03-20 19:17:22,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-20 19:17:22,752 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0273972602739727) 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 [2022-03-20 19:17:22,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:17:22,752 INFO L225 Difference]: With dead ends: 86 [2022-03-20 19:17:22,752 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 19:17:22,753 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2546 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=7192, Invalid=13114, Unknown=0, NotChecked=0, Total=20306 [2022-03-20 19:17:22,754 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:17:22,754 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:17:22,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 19:17:22,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-03-20 19:17:22,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:17:22,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2022-03-20 19:17:22,757 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2022-03-20 19:17:22,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:17:22,757 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2022-03-20 19:17:22,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.0273972602739727) 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) [2022-03-20 19:17:22,757 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2022-03-20 19:17:22,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 19:17:22,757 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:17:22,757 INFO L499 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:17:22,758 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-03-20 19:17:22,758 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:17:22,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:17:22,758 INFO L85 PathProgramCache]: Analyzing trace with hash 644254744, now seen corresponding path program 68 times [2022-03-20 19:17:22,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:22,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [236043797] [2022-03-20 19:17:22,894 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:17:22,894 INFO L85 PathProgramCache]: Analyzing trace with hash -305945625, now seen corresponding path program 1 times [2022-03-20 19:17:22,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:17:22,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650130543] [2022-03-20 19:17:22,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:17:22,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:17:22,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:22,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:17:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:17:22,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:17:22,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650130543] [2022-03-20 19:17:22,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650130543] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:22,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:22,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:17:24,245 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:17:24,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [236043797] [2022-03-20 19:17:24,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [236043797] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:24,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:24,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-20 19:17:24,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753353734] [2022-03-20 19:17:24,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:17:24,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-20 19:17:24,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:24,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-20 19:17:24,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=2979, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 19:17:24,246 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 74 states, 74 states have (on average 1.027027027027027) 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) [2022-03-20 19:17:25,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:17:25,996 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2022-03-20 19:17:25,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-20 19:17:25,996 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.027027027027027) 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 [2022-03-20 19:17:25,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:17:25,997 INFO L225 Difference]: With dead ends: 87 [2022-03-20 19:17:25,997 INFO L226 Difference]: Without dead ends: 82 [2022-03-20 19:17:25,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2618 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7401, Invalid=13479, Unknown=0, NotChecked=0, Total=20880 [2022-03-20 19:17:25,998 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:17:25,998 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:17:25,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-20 19:17:26,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-03-20 19:17:26,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:17:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2022-03-20 19:17:26,001 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2022-03-20 19:17:26,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:17:26,001 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2022-03-20 19:17:26,001 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.027027027027027) 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) [2022-03-20 19:17:26,001 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2022-03-20 19:17:26,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 19:17:26,001 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:17:26,002 INFO L499 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:17:26,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-03-20 19:17:26,002 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:17:26,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:17:26,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1467550586, now seen corresponding path program 69 times [2022-03-20 19:17:26,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:26,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1688483082] [2022-03-20 19:17:26,090 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:17:26,091 INFO L85 PathProgramCache]: Analyzing trace with hash -246840281, now seen corresponding path program 1 times [2022-03-20 19:17:26,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:17:26,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434767052] [2022-03-20 19:17:26,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:17:26,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:17:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:26,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:17:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:17:26,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:17:26,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434767052] [2022-03-20 19:17:26,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434767052] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:26,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:26,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:17:27,773 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:17:27,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1688483082] [2022-03-20 19:17:27,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1688483082] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:27,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:27,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-20 19:17:27,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063563336] [2022-03-20 19:17:27,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:17:27,774 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-20 19:17:27,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:27,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-20 19:17:27,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2493, Invalid=3057, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 19:17:27,775 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 75 states, 75 states have (on average 1.0266666666666666) 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) [2022-03-20 19:17:29,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:17:29,286 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2022-03-20 19:17:29,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-20 19:17:29,286 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.0266666666666666) 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 [2022-03-20 19:17:29,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:17:29,286 INFO L225 Difference]: With dead ends: 88 [2022-03-20 19:17:29,286 INFO L226 Difference]: Without dead ends: 83 [2022-03-20 19:17:29,288 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7613, Invalid=13849, Unknown=0, NotChecked=0, Total=21462 [2022-03-20 19:17:29,288 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:17:29,288 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:17:29,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-20 19:17:29,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-20 19:17:29,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:17:29,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2022-03-20 19:17:29,293 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2022-03-20 19:17:29,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:17:29,293 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2022-03-20 19:17:29,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.0266666666666666) 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) [2022-03-20 19:17:29,293 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2022-03-20 19:17:29,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 19:17:29,294 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:17:29,294 INFO L499 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:17:29,294 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-03-20 19:17:29,294 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:17:29,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:17:29,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1785960920, now seen corresponding path program 70 times [2022-03-20 19:17:29,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:29,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [259724318] [2022-03-20 19:17:29,378 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:17:29,379 INFO L85 PathProgramCache]: Analyzing trace with hash -187734937, now seen corresponding path program 1 times [2022-03-20 19:17:29,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:17:29,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624589443] [2022-03-20 19:17:29,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:17:29,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:17:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:29,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:17:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:17:29,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:17:29,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624589443] [2022-03-20 19:17:29,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624589443] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:29,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:29,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:17:31,397 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:17:31,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [259724318] [2022-03-20 19:17:31,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [259724318] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:31,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:31,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-20 19:17:31,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462522935] [2022-03-20 19:17:31,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:17:31,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-20 19:17:31,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:31,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-20 19:17:31,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2564, Invalid=3136, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 19:17:31,399 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 76 states, 76 states have (on average 1.0263157894736843) 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) [2022-03-20 19:17:33,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:17:33,163 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2022-03-20 19:17:33,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-20 19:17:33,164 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0263157894736843) 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 [2022-03-20 19:17:33,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:17:33,164 INFO L225 Difference]: With dead ends: 89 [2022-03-20 19:17:33,164 INFO L226 Difference]: Without dead ends: 84 [2022-03-20 19:17:33,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2765 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=7828, Invalid=14224, Unknown=0, NotChecked=0, Total=22052 [2022-03-20 19:17:33,166 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:17:33,166 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:17:33,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-20 19:17:33,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-03-20 19:17:33,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 79 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:17:33,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2022-03-20 19:17:33,170 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2022-03-20 19:17:33,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:17:33,170 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2022-03-20 19:17:33,170 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.0263157894736843) 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) [2022-03-20 19:17:33,170 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2022-03-20 19:17:33,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 19:17:33,170 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:17:33,170 INFO L499 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:17:33,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-03-20 19:17:33,171 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:17:33,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:17:33,171 INFO L85 PathProgramCache]: Analyzing trace with hash -434397498, now seen corresponding path program 71 times [2022-03-20 19:17:33,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:33,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [779159610] [2022-03-20 19:17:33,306 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:17:33,306 INFO L85 PathProgramCache]: Analyzing trace with hash -128629593, now seen corresponding path program 1 times [2022-03-20 19:17:33,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:17:33,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966455885] [2022-03-20 19:17:33,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:17:33,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:17:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:33,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:17:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:33,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:17:33,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:17:33,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966455885] [2022-03-20 19:17:33,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966455885] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:33,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:33,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:17:34,928 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:17:34,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [779159610] [2022-03-20 19:17:34,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [779159610] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:34,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:34,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-20 19:17:34,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266041837] [2022-03-20 19:17:34,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:17:34,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-20 19:17:34,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:34,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-20 19:17:34,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2636, Invalid=3216, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 19:17:34,929 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 77 states, 77 states have (on average 1.025974025974026) 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) [2022-03-20 19:17:36,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:17:36,513 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2022-03-20 19:17:36,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-20 19:17:36,515 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.025974025974026) 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 [2022-03-20 19:17:36,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:17:36,516 INFO L225 Difference]: With dead ends: 90 [2022-03-20 19:17:36,516 INFO L226 Difference]: Without dead ends: 85 [2022-03-20 19:17:36,517 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2840 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=8046, Invalid=14604, Unknown=0, NotChecked=0, Total=22650 [2022-03-20 19:17:36,517 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:17:36,517 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:17:36,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-20 19:17:36,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-03-20 19:17:36,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:17:36,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2022-03-20 19:17:36,521 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2022-03-20 19:17:36,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:17:36,521 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2022-03-20 19:17:36,521 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.025974025974026) 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) [2022-03-20 19:17:36,521 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2022-03-20 19:17:36,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 19:17:36,521 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:17:36,522 INFO L499 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:17:36,522 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-03-20 19:17:36,522 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:17:36,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:17:36,522 INFO L85 PathProgramCache]: Analyzing trace with hash -546031720, now seen corresponding path program 72 times [2022-03-20 19:17:36,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:36,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [402513971] [2022-03-20 19:17:36,610 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:17:36,610 INFO L85 PathProgramCache]: Analyzing trace with hash -69524249, now seen corresponding path program 1 times [2022-03-20 19:17:36,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:17:36,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247504915] [2022-03-20 19:17:36,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:17:36,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:17:36,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:36,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:17:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:17:36,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:17:36,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247504915] [2022-03-20 19:17:36,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247504915] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:36,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:36,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:17:38,173 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:17:38,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [402513971] [2022-03-20 19:17:38,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [402513971] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:38,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:38,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-20 19:17:38,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274975731] [2022-03-20 19:17:38,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:17:38,174 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-20 19:17:38,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:38,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-20 19:17:38,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2709, Invalid=3297, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 19:17:38,176 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 78 states, 78 states have (on average 1.0256410256410255) 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) [2022-03-20 19:17:40,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:17:40,604 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2022-03-20 19:17:40,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-20 19:17:40,606 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.0256410256410255) 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 [2022-03-20 19:17:40,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:17:40,607 INFO L225 Difference]: With dead ends: 91 [2022-03-20 19:17:40,607 INFO L226 Difference]: Without dead ends: 86 [2022-03-20 19:17:40,609 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2916 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=8267, Invalid=14989, Unknown=0, NotChecked=0, Total=23256 [2022-03-20 19:17:40,609 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:17:40,609 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:17:40,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-20 19:17:40,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-03-20 19:17:40,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 81 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:17:40,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2022-03-20 19:17:40,613 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2022-03-20 19:17:40,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:17:40,613 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2022-03-20 19:17:40,613 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.0256410256410255) 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) [2022-03-20 19:17:40,613 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2022-03-20 19:17:40,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 19:17:40,613 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:17:40,613 INFO L499 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:17:40,613 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-03-20 19:17:40,614 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:17:40,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:17:40,614 INFO L85 PathProgramCache]: Analyzing trace with hash 288274694, now seen corresponding path program 73 times [2022-03-20 19:17:40,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:40,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1322797425] [2022-03-20 19:17:40,737 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:17:40,737 INFO L85 PathProgramCache]: Analyzing trace with hash -10418905, now seen corresponding path program 1 times [2022-03-20 19:17:40,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:17:40,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561323546] [2022-03-20 19:17:40,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:17:40,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:17:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:40,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:17:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:17:40,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:17:40,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561323546] [2022-03-20 19:17:40,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561323546] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:40,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:40,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:17:42,174 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:17:42,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1322797425] [2022-03-20 19:17:42,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1322797425] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:42,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:42,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-20 19:17:42,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498213364] [2022-03-20 19:17:42,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:17:42,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-20 19:17:42,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:42,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-20 19:17:42,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2783, Invalid=3379, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 19:17:42,176 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 79 states, 79 states have (on average 1.0253164556962024) 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) [2022-03-20 19:17:43,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:17:43,917 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2022-03-20 19:17:43,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-20 19:17:43,918 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0253164556962024) 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 [2022-03-20 19:17:43,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:17:43,918 INFO L225 Difference]: With dead ends: 92 [2022-03-20 19:17:43,918 INFO L226 Difference]: Without dead ends: 87 [2022-03-20 19:17:43,920 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2993 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=8491, Invalid=15379, Unknown=0, NotChecked=0, Total=23870 [2022-03-20 19:17:43,920 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:17:43,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:17:43,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-20 19:17:43,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-03-20 19:17:43,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:17:43,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2022-03-20 19:17:43,924 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2022-03-20 19:17:43,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:17:43,924 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2022-03-20 19:17:43,924 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.0253164556962024) 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) [2022-03-20 19:17:43,924 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2022-03-20 19:17:43,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 19:17:43,924 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:17:43,924 INFO L499 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:17:43,924 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-03-20 19:17:43,924 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:17:43,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:17:43,925 INFO L85 PathProgramCache]: Analyzing trace with hash 381969752, now seen corresponding path program 74 times [2022-03-20 19:17:43,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:43,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1527638876] [2022-03-20 19:17:44,065 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:17:44,065 INFO L85 PathProgramCache]: Analyzing trace with hash 48686439, now seen corresponding path program 1 times [2022-03-20 19:17:44,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:17:44,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875439581] [2022-03-20 19:17:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:17:44,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:17:44,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:44,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:17:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:17:44,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:17:44,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875439581] [2022-03-20 19:17:44,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875439581] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:44,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:44,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:17:45,912 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:17:45,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1527638876] [2022-03-20 19:17:45,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1527638876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:45,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:45,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-20 19:17:45,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802864874] [2022-03-20 19:17:45,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:17:45,913 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-20 19:17:45,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:45,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-20 19:17:45,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2858, Invalid=3462, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 19:17:45,914 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 80 states, 80 states have (on average 1.025) 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) [2022-03-20 19:17:47,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:17:47,619 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2022-03-20 19:17:47,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-20 19:17:47,620 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.025) 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 [2022-03-20 19:17:47,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:17:47,620 INFO L225 Difference]: With dead ends: 93 [2022-03-20 19:17:47,620 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 19:17:47,622 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3071 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8718, Invalid=15774, Unknown=0, NotChecked=0, Total=24492 [2022-03-20 19:17:47,622 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:17:47,622 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:17:47,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 19:17:47,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-20 19:17:47,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 83 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:17:47,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2022-03-20 19:17:47,626 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2022-03-20 19:17:47,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:17:47,626 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2022-03-20 19:17:47,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.025) 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) [2022-03-20 19:17:47,626 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2022-03-20 19:17:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 19:17:47,626 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:17:47,626 INFO L499 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:17:47,626 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-03-20 19:17:47,626 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:17:47,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:17:47,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1008450746, now seen corresponding path program 75 times [2022-03-20 19:17:47,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:47,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [682267063] [2022-03-20 19:17:47,785 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:17:47,786 INFO L85 PathProgramCache]: Analyzing trace with hash 107791783, now seen corresponding path program 1 times [2022-03-20 19:17:47,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:17:47,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399146333] [2022-03-20 19:17:47,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:17:47,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:17:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:47,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:17:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:47,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:17:47,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:17:47,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399146333] [2022-03-20 19:17:47,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399146333] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:47,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:47,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:17:49,800 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:17:49,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [682267063] [2022-03-20 19:17:49,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [682267063] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:49,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:49,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-20 19:17:49,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679587673] [2022-03-20 19:17:49,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:17:49,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-20 19:17:49,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:49,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-20 19:17:49,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2934, Invalid=3546, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 19:17:49,802 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 81 states, 81 states have (on average 1.0246913580246915) 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) [2022-03-20 19:17:51,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:17:51,811 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-03-20 19:17:51,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-20 19:17:51,811 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0246913580246915) 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 [2022-03-20 19:17:51,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:17:51,811 INFO L225 Difference]: With dead ends: 94 [2022-03-20 19:17:51,812 INFO L226 Difference]: Without dead ends: 89 [2022-03-20 19:17:51,813 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3150 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=8948, Invalid=16174, Unknown=0, NotChecked=0, Total=25122 [2022-03-20 19:17:51,813 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:17:51,813 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:17:51,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-20 19:17:51,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-03-20 19:17:51,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:17:51,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2022-03-20 19:17:51,817 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2022-03-20 19:17:51,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:17:51,817 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2022-03-20 19:17:51,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.0246913580246915) 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) [2022-03-20 19:17:51,817 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2022-03-20 19:17:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 19:17:51,817 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:17:51,817 INFO L499 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:17:51,818 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-03-20 19:17:51,818 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:17:51,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:17:51,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1161813224, now seen corresponding path program 76 times [2022-03-20 19:17:51,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:51,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [243560968] [2022-03-20 19:17:51,909 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:17:51,909 INFO L85 PathProgramCache]: Analyzing trace with hash 166897127, now seen corresponding path program 1 times [2022-03-20 19:17:51,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:17:51,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280429057] [2022-03-20 19:17:51,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:17:51,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:17:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:51,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:17:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:17:51,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:17:51,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280429057] [2022-03-20 19:17:51,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280429057] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:51,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:51,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:17:53,710 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:17:53,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [243560968] [2022-03-20 19:17:53,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [243560968] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:53,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:53,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-20 19:17:53,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739965962] [2022-03-20 19:17:53,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:17:53,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-20 19:17:53,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:53,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-20 19:17:53,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3011, Invalid=3631, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 19:17:53,711 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 82 states, 82 states have (on average 1.024390243902439) 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) [2022-03-20 19:17:55,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:17:55,827 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2022-03-20 19:17:55,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-20 19:17:55,827 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.024390243902439) 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 [2022-03-20 19:17:55,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:17:55,828 INFO L225 Difference]: With dead ends: 95 [2022-03-20 19:17:55,828 INFO L226 Difference]: Without dead ends: 90 [2022-03-20 19:17:55,829 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3230 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9181, Invalid=16579, Unknown=0, NotChecked=0, Total=25760 [2022-03-20 19:17:55,830 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:17:55,830 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:17:55,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-20 19:17:55,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-03-20 19:17:55,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:17:55,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2022-03-20 19:17:55,834 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2022-03-20 19:17:55,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:17:55,834 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2022-03-20 19:17:55,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.024390243902439) 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) [2022-03-20 19:17:55,834 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2022-03-20 19:17:55,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 19:17:55,835 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:17:55,835 INFO L499 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:17:55,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-03-20 19:17:55,835 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:17:55,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:17:55,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1621082746, now seen corresponding path program 77 times [2022-03-20 19:17:55,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:55,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [751466344] [2022-03-20 19:17:55,927 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:17:55,928 INFO L85 PathProgramCache]: Analyzing trace with hash 226002471, now seen corresponding path program 1 times [2022-03-20 19:17:55,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:17:55,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424313506] [2022-03-20 19:17:55,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:17:55,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:17:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:55,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:17:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:17:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:17:55,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:17:55,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424313506] [2022-03-20 19:17:55,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424313506] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:55,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:55,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:17:57,785 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:17:57,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [751466344] [2022-03-20 19:17:57,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [751466344] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:17:57,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:17:57,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-20 19:17:57,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351351161] [2022-03-20 19:17:57,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:17:57,786 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-20 19:17:57,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:57,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-20 19:17:57,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3089, Invalid=3717, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 19:17:57,787 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 83 states, 83 states have (on average 1.0240963855421688) 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) [2022-03-20 19:17:59,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:17:59,912 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2022-03-20 19:17:59,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-20 19:17:59,912 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.0240963855421688) 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 [2022-03-20 19:17:59,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:17:59,913 INFO L225 Difference]: With dead ends: 96 [2022-03-20 19:17:59,913 INFO L226 Difference]: Without dead ends: 91 [2022-03-20 19:17:59,914 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3311 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9417, Invalid=16989, Unknown=0, NotChecked=0, Total=26406 [2022-03-20 19:17:59,914 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:17:59,914 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:17:59,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-20 19:17:59,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-20 19:17:59,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:17:59,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2022-03-20 19:17:59,918 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2022-03-20 19:17:59,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:17:59,918 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2022-03-20 19:17:59,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.0240963855421688) 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) [2022-03-20 19:17:59,918 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2022-03-20 19:17:59,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-20 19:17:59,919 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:17:59,919 INFO L499 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:17:59,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-03-20 19:17:59,919 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:17:59,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:17:59,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1321431256, now seen corresponding path program 78 times [2022-03-20 19:17:59,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:17:59,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [169784722] [2022-03-20 19:18:00,016 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:18:00,016 INFO L85 PathProgramCache]: Analyzing trace with hash 285107815, now seen corresponding path program 1 times [2022-03-20 19:18:00,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:18:00,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206923230] [2022-03-20 19:18:00,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:18:00,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:18:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:00,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:18:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:18:00,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:18:00,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206923230] [2022-03-20 19:18:00,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206923230] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:00,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:00,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:18:02,401 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:18:02,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [169784722] [2022-03-20 19:18:02,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [169784722] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:02,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:02,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-20 19:18:02,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949880729] [2022-03-20 19:18:02,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:18:02,401 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-20 19:18:02,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:02,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-20 19:18:02,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3168, Invalid=3804, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 19:18:02,402 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 84 states, 84 states have (on average 1.0238095238095237) 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) [2022-03-20 19:18:04,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:18:04,589 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2022-03-20 19:18:04,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 19:18:04,589 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0238095238095237) 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 [2022-03-20 19:18:04,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:18:04,590 INFO L225 Difference]: With dead ends: 97 [2022-03-20 19:18:04,590 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 19:18:04,591 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3393 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=9656, Invalid=17404, Unknown=0, NotChecked=0, Total=27060 [2022-03-20 19:18:04,591 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:18:04,591 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:18:04,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 19:18:04,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-03-20 19:18:04,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 87 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:18:04,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2022-03-20 19:18:04,595 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2022-03-20 19:18:04,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:18:04,595 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2022-03-20 19:18:04,596 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.0238095238095237) 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) [2022-03-20 19:18:04,596 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2022-03-20 19:18:04,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 19:18:04,596 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:18:04,596 INFO L499 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:18:04,596 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-03-20 19:18:04,596 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:18:04,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:18:04,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1949915194, now seen corresponding path program 79 times [2022-03-20 19:18:04,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:04,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [792823465] [2022-03-20 19:18:04,684 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:18:04,685 INFO L85 PathProgramCache]: Analyzing trace with hash 344213159, now seen corresponding path program 1 times [2022-03-20 19:18:04,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:18:04,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781830869] [2022-03-20 19:18:04,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:18:04,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:18:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:04,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:18:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:04,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:18:04,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:18:04,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781830869] [2022-03-20 19:18:04,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781830869] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:04,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:04,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:18:06,196 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:18:06,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [792823465] [2022-03-20 19:18:06,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [792823465] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:06,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:06,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-20 19:18:06,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52680578] [2022-03-20 19:18:06,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:18:06,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-20 19:18:06,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:06,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-20 19:18:06,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3248, Invalid=3892, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 19:18:06,199 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand has 85 states, 85 states have (on average 1.0235294117647058) 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) [2022-03-20 19:18:08,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:18:08,295 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2022-03-20 19:18:08,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-20 19:18:08,296 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0235294117647058) 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 [2022-03-20 19:18:08,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:18:08,296 INFO L225 Difference]: With dead ends: 98 [2022-03-20 19:18:08,296 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 19:18:08,298 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3476 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=9898, Invalid=17824, Unknown=0, NotChecked=0, Total=27722 [2022-03-20 19:18:08,298 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:18:08,298 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:18:08,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 19:18:08,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-20 19:18:08,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:18:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2022-03-20 19:18:08,302 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2022-03-20 19:18:08,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:18:08,302 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2022-03-20 19:18:08,302 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.0235294117647058) 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) [2022-03-20 19:18:08,302 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2022-03-20 19:18:08,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 19:18:08,302 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:18:08,302 INFO L499 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:18:08,302 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-03-20 19:18:08,302 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:18:08,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:18:08,303 INFO L85 PathProgramCache]: Analyzing trace with hash -282440040, now seen corresponding path program 80 times [2022-03-20 19:18:08,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:08,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1976972578] [2022-03-20 19:18:08,385 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:18:08,385 INFO L85 PathProgramCache]: Analyzing trace with hash 403318503, now seen corresponding path program 1 times [2022-03-20 19:18:08,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:18:08,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266493148] [2022-03-20 19:18:08,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:18:08,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:18:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:08,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:18:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:08,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:18:08,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:18:08,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266493148] [2022-03-20 19:18:08,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266493148] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:08,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:08,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:18:10,895 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:18:10,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1976972578] [2022-03-20 19:18:10,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1976972578] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:10,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:10,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-20 19:18:10,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962210860] [2022-03-20 19:18:10,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:18:10,896 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-20 19:18:10,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:10,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-20 19:18:10,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3329, Invalid=3981, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 19:18:10,897 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 86 states, 86 states have (on average 1.0232558139534884) 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) [2022-03-20 19:18:13,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:18:13,922 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2022-03-20 19:18:13,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-20 19:18:13,923 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.0232558139534884) 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 [2022-03-20 19:18:13,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:18:13,923 INFO L225 Difference]: With dead ends: 99 [2022-03-20 19:18:13,923 INFO L226 Difference]: Without dead ends: 94 [2022-03-20 19:18:13,925 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3560 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=10143, Invalid=18249, Unknown=0, NotChecked=0, Total=28392 [2022-03-20 19:18:13,925 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:18:13,925 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:18:13,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-20 19:18:13,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-03-20 19:18:13,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 89 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:18:13,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2022-03-20 19:18:13,929 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2022-03-20 19:18:13,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:18:13,929 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2022-03-20 19:18:13,929 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.0232558139534884) 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) [2022-03-20 19:18:13,929 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2022-03-20 19:18:13,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 19:18:13,929 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:18:13,929 INFO L499 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:18:13,930 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-03-20 19:18:13,930 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:18:13,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:18:13,930 INFO L85 PathProgramCache]: Analyzing trace with hash -130317818, now seen corresponding path program 81 times [2022-03-20 19:18:13,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:13,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [422717302] [2022-03-20 19:18:14,067 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:18:14,067 INFO L85 PathProgramCache]: Analyzing trace with hash 462423847, now seen corresponding path program 1 times [2022-03-20 19:18:14,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:18:14,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940314336] [2022-03-20 19:18:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:18:14,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:18:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:14,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:18:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:18:14,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:18:14,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940314336] [2022-03-20 19:18:14,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940314336] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:14,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:14,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:18:15,743 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:18:15,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [422717302] [2022-03-20 19:18:15,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [422717302] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:15,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:15,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-20 19:18:15,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819633148] [2022-03-20 19:18:15,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:18:15,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-20 19:18:15,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:15,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-20 19:18:15,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3411, Invalid=4071, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 19:18:15,745 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 87 states, 87 states have (on average 1.0229885057471264) 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) [2022-03-20 19:18:17,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:18:17,724 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2022-03-20 19:18:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-20 19:18:17,725 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0229885057471264) 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 [2022-03-20 19:18:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:18:17,725 INFO L225 Difference]: With dead ends: 100 [2022-03-20 19:18:17,725 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 19:18:17,727 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3645 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=10391, Invalid=18679, Unknown=0, NotChecked=0, Total=29070 [2022-03-20 19:18:17,727 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:18:17,727 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:18:17,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 19:18:17,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-03-20 19:18:17,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:18:17,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2022-03-20 19:18:17,731 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2022-03-20 19:18:17,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:18:17,731 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2022-03-20 19:18:17,731 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0229885057471264) 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) [2022-03-20 19:18:17,731 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2022-03-20 19:18:17,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 19:18:17,732 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:18:17,732 INFO L499 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:18:17,732 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-03-20 19:18:17,732 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:18:17,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:18:17,732 INFO L85 PathProgramCache]: Analyzing trace with hash 290503768, now seen corresponding path program 82 times [2022-03-20 19:18:17,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:17,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1057650061] [2022-03-20 19:18:17,823 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:18:17,823 INFO L85 PathProgramCache]: Analyzing trace with hash 521529191, now seen corresponding path program 1 times [2022-03-20 19:18:17,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:18:17,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374328586] [2022-03-20 19:18:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:18:17,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:18:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:17,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:18:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:18:17,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:18:17,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374328586] [2022-03-20 19:18:17,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374328586] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:17,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:17,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:18:19,732 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:18:19,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1057650061] [2022-03-20 19:18:19,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1057650061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:19,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:19,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-20 19:18:19,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518419200] [2022-03-20 19:18:19,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:18:19,733 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-20 19:18:19,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:19,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-20 19:18:19,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3494, Invalid=4162, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 19:18:19,735 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 88 states, 88 states have (on average 1.0227272727272727) 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) [2022-03-20 19:18:22,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:18:22,290 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2022-03-20 19:18:22,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-20 19:18:22,290 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0227272727272727) 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 [2022-03-20 19:18:22,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:18:22,290 INFO L225 Difference]: With dead ends: 101 [2022-03-20 19:18:22,290 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 19:18:22,291 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3731 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10642, Invalid=19114, Unknown=0, NotChecked=0, Total=29756 [2022-03-20 19:18:22,292 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:18:22,292 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:18:22,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 19:18:22,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-03-20 19:18:22,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.010989010989011) internal successors, (92), 91 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:18:22,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2022-03-20 19:18:22,295 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2022-03-20 19:18:22,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:18:22,296 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2022-03-20 19:18:22,296 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.0227272727272727) 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) [2022-03-20 19:18:22,296 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2022-03-20 19:18:22,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 19:18:22,296 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:18:22,296 INFO L499 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:18:22,296 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-03-20 19:18:22,296 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:18:22,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:18:22,296 INFO L85 PathProgramCache]: Analyzing trace with hash 451071046, now seen corresponding path program 83 times [2022-03-20 19:18:22,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:22,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1921139778] [2022-03-20 19:18:22,430 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:18:22,431 INFO L85 PathProgramCache]: Analyzing trace with hash 580634535, now seen corresponding path program 1 times [2022-03-20 19:18:22,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:18:22,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774728307] [2022-03-20 19:18:22,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:18:22,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:18:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:22,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:18:22,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:18:22,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:18:22,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774728307] [2022-03-20 19:18:22,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774728307] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:22,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:22,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:18:24,176 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:18:24,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1921139778] [2022-03-20 19:18:24,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1921139778] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:24,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:24,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-20 19:18:24,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940390932] [2022-03-20 19:18:24,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:18:24,177 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-20 19:18:24,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:24,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-20 19:18:24,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3578, Invalid=4254, Unknown=0, NotChecked=0, Total=7832 [2022-03-20 19:18:24,178 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 89 states, 89 states have (on average 1.0224719101123596) 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) [2022-03-20 19:18:26,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:18:26,278 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2022-03-20 19:18:26,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-20 19:18:26,283 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0224719101123596) 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 [2022-03-20 19:18:26,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:18:26,283 INFO L225 Difference]: With dead ends: 102 [2022-03-20 19:18:26,283 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 19:18:26,284 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3818 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=10896, Invalid=19554, Unknown=0, NotChecked=0, Total=30450 [2022-03-20 19:18:26,285 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:18:26,285 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:18:26,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 19:18:26,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-03-20 19:18:26,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:18:26,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2022-03-20 19:18:26,288 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2022-03-20 19:18:26,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:18:26,289 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2022-03-20 19:18:26,289 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.0224719101123596) 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) [2022-03-20 19:18:26,289 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2022-03-20 19:18:26,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 19:18:26,289 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:18:26,289 INFO L499 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:18:26,289 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-03-20 19:18:26,289 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:18:26,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:18:26,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1133689368, now seen corresponding path program 84 times [2022-03-20 19:18:26,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:26,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1891281694] [2022-03-20 19:18:26,383 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:18:26,384 INFO L85 PathProgramCache]: Analyzing trace with hash 639739879, now seen corresponding path program 1 times [2022-03-20 19:18:26,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:18:26,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486928983] [2022-03-20 19:18:26,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:18:26,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:18:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:26,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:18:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:18:26,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:18:26,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486928983] [2022-03-20 19:18:26,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486928983] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:26,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:26,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:18:28,398 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:18:28,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1891281694] [2022-03-20 19:18:28,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1891281694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:28,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:28,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-20 19:18:28,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422159779] [2022-03-20 19:18:28,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:18:28,399 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-20 19:18:28,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:28,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-20 19:18:28,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3663, Invalid=4347, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 19:18:28,400 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 90 states, 90 states have (on average 1.0222222222222221) 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) [2022-03-20 19:18:30,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:18:30,505 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2022-03-20 19:18:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-20 19:18:30,505 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.0222222222222221) 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 [2022-03-20 19:18:30,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:18:30,505 INFO L225 Difference]: With dead ends: 103 [2022-03-20 19:18:30,505 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 19:18:30,507 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3906 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=11153, Invalid=19999, Unknown=0, NotChecked=0, Total=31152 [2022-03-20 19:18:30,507 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:18:30,507 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:18:30,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 19:18:30,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-03-20 19:18:30,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.010752688172043) internal successors, (94), 93 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:18:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2022-03-20 19:18:30,512 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2022-03-20 19:18:30,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:18:30,513 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2022-03-20 19:18:30,513 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.0222222222222221) 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) [2022-03-20 19:18:30,513 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2022-03-20 19:18:30,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 19:18:30,513 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:18:30,513 INFO L499 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:18:30,513 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-03-20 19:18:30,513 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:18:30,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:18:30,513 INFO L85 PathProgramCache]: Analyzing trace with hash 820020870, now seen corresponding path program 85 times [2022-03-20 19:18:30,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:30,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1125509644] [2022-03-20 19:18:30,572 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:18:30,573 INFO L85 PathProgramCache]: Analyzing trace with hash 698845223, now seen corresponding path program 1 times [2022-03-20 19:18:30,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:18:30,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281534109] [2022-03-20 19:18:30,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:18:30,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:18:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:30,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:18:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:18:30,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:18:30,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281534109] [2022-03-20 19:18:30,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281534109] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:30,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:30,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:18:32,309 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:18:32,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1125509644] [2022-03-20 19:18:32,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1125509644] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:32,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:32,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-20 19:18:32,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320839615] [2022-03-20 19:18:32,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:18:32,310 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-20 19:18:32,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:32,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-20 19:18:32,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3749, Invalid=4441, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 19:18:32,312 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand has 91 states, 91 states have (on average 1.021978021978022) 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) [2022-03-20 19:18:34,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:18:34,442 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2022-03-20 19:18:34,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-20 19:18:34,442 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.021978021978022) 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 [2022-03-20 19:18:34,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:18:34,442 INFO L225 Difference]: With dead ends: 104 [2022-03-20 19:18:34,442 INFO L226 Difference]: Without dead ends: 99 [2022-03-20 19:18:34,444 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3995 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=11413, Invalid=20449, Unknown=0, NotChecked=0, Total=31862 [2022-03-20 19:18:34,444 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:18:34,446 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:18:34,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-20 19:18:34,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-03-20 19:18:34,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:18:34,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-03-20 19:18:34,466 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2022-03-20 19:18:34,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:18:34,466 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-03-20 19:18:34,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.021978021978022) 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) [2022-03-20 19:18:34,466 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-03-20 19:18:34,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-20 19:18:34,467 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:18:34,467 INFO L499 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:18:34,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-03-20 19:18:34,467 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:18:34,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:18:34,467 INFO L85 PathProgramCache]: Analyzing trace with hash -313767976, now seen corresponding path program 86 times [2022-03-20 19:18:34,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:34,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1967675929] [2022-03-20 19:18:34,622 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:18:34,623 INFO L85 PathProgramCache]: Analyzing trace with hash 757950567, now seen corresponding path program 1 times [2022-03-20 19:18:34,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:18:34,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633315141] [2022-03-20 19:18:34,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:18:34,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:18:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:34,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:18:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:18:34,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:18:34,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633315141] [2022-03-20 19:18:34,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633315141] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:34,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:34,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:18:37,320 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:18:37,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1967675929] [2022-03-20 19:18:37,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1967675929] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:37,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:37,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-20 19:18:37,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267639372] [2022-03-20 19:18:37,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:18:37,321 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-20 19:18:37,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:37,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-20 19:18:37,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3836, Invalid=4536, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 19:18:37,322 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 92 states, 92 states have (on average 1.0217391304347827) 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) [2022-03-20 19:18:39,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:18:39,496 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2022-03-20 19:18:39,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-20 19:18:39,496 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.0217391304347827) 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) Word has length 98 [2022-03-20 19:18:39,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:18:39,497 INFO L225 Difference]: With dead ends: 105 [2022-03-20 19:18:39,497 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 19:18:39,498 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4085 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=11676, Invalid=20904, Unknown=0, NotChecked=0, Total=32580 [2022-03-20 19:18:39,499 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:18:39,499 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 67 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:18:39,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 19:18:39,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-03-20 19:18:39,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:18:39,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2022-03-20 19:18:39,503 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2022-03-20 19:18:39,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:18:39,503 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2022-03-20 19:18:39,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.0217391304347827) 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) [2022-03-20 19:18:39,503 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2022-03-20 19:18:39,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 19:18:39,503 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:18:39,503 INFO L499 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:18:39,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-03-20 19:18:39,503 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:18:39,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:18:39,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1101483834, now seen corresponding path program 87 times [2022-03-20 19:18:39,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:39,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2054162468] [2022-03-20 19:18:39,595 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:18:39,595 INFO L85 PathProgramCache]: Analyzing trace with hash 817055911, now seen corresponding path program 1 times [2022-03-20 19:18:39,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:18:39,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634716317] [2022-03-20 19:18:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:18:39,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:18:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:39,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:18:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:18:39,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:18:39,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634716317] [2022-03-20 19:18:39,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634716317] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:39,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:39,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:18:41,902 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:18:41,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2054162468] [2022-03-20 19:18:41,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2054162468] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:41,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:41,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-20 19:18:41,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196577838] [2022-03-20 19:18:41,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:18:41,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-20 19:18:41,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:41,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-20 19:18:41,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3924, Invalid=4632, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 19:18:41,904 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand has 93 states, 93 states have (on average 1.021505376344086) internal successors, (95), 91 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:18:44,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:18:44,144 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2022-03-20 19:18:44,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-20 19:18:44,145 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.021505376344086) internal successors, (95), 91 states have internal predecessors, (95), 2 states have call successors, (3), 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 99 [2022-03-20 19:18:44,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:18:44,145 INFO L225 Difference]: With dead ends: 106 [2022-03-20 19:18:44,145 INFO L226 Difference]: Without dead ends: 101 [2022-03-20 19:18:44,147 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4176 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=11942, Invalid=21364, Unknown=0, NotChecked=0, Total=33306 [2022-03-20 19:18:44,147 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:18:44,147 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:18:44,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-20 19:18:44,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-20 19:18:44,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:18:44,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2022-03-20 19:18:44,153 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2022-03-20 19:18:44,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:18:44,153 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2022-03-20 19:18:44,153 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.021505376344086) internal successors, (95), 91 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:18:44,153 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2022-03-20 19:18:44,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 19:18:44,154 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:18:44,154 INFO L499 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:18:44,154 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-03-20 19:18:44,154 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:18:44,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:18:44,154 INFO L85 PathProgramCache]: Analyzing trace with hash 249128344, now seen corresponding path program 88 times [2022-03-20 19:18:44,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:44,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1902757052] [2022-03-20 19:18:44,252 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:18:44,252 INFO L85 PathProgramCache]: Analyzing trace with hash 876161255, now seen corresponding path program 1 times [2022-03-20 19:18:44,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:18:44,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684515102] [2022-03-20 19:18:44,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:18:44,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:18:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:44,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:18:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:18:44,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:18:44,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684515102] [2022-03-20 19:18:44,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684515102] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:44,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:44,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:18:46,121 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:18:46,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1902757052] [2022-03-20 19:18:46,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1902757052] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:46,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:46,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-20 19:18:46,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012573957] [2022-03-20 19:18:46,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:18:46,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-20 19:18:46,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:46,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-20 19:18:46,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4013, Invalid=4729, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 19:18:46,124 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 94 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 92 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:18:48,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:18:48,440 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2022-03-20 19:18:48,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-20 19:18:48,440 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 92 states have internal predecessors, (96), 2 states have call successors, (3), 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 100 [2022-03-20 19:18:48,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:18:48,440 INFO L225 Difference]: With dead ends: 107 [2022-03-20 19:18:48,440 INFO L226 Difference]: Without dead ends: 102 [2022-03-20 19:18:48,442 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4268 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=12211, Invalid=21829, Unknown=0, NotChecked=0, Total=34040 [2022-03-20 19:18:48,442 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:18:48,442 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:18:48,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-20 19:18:48,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-03-20 19:18:48,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 97 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:18:48,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2022-03-20 19:18:48,446 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2022-03-20 19:18:48,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:18:48,446 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2022-03-20 19:18:48,446 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 92 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:18:48,446 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2022-03-20 19:18:48,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 19:18:48,447 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:18:48,447 INFO L499 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:18:48,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-03-20 19:18:48,447 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:18:48,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:18:48,447 INFO L85 PathProgramCache]: Analyzing trace with hash -831567098, now seen corresponding path program 89 times [2022-03-20 19:18:48,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:48,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1543689691] [2022-03-20 19:18:48,542 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:18:48,543 INFO L85 PathProgramCache]: Analyzing trace with hash 935266599, now seen corresponding path program 1 times [2022-03-20 19:18:48,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:18:48,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306340729] [2022-03-20 19:18:48,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:18:48,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:18:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:48,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:18:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:48,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:18:48,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:18:48,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306340729] [2022-03-20 19:18:48,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306340729] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:48,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:48,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:18:50,622 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:18:50,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1543689691] [2022-03-20 19:18:50,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1543689691] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:50,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:50,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-20 19:18:50,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726713692] [2022-03-20 19:18:50,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:18:50,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-20 19:18:50,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:50,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-20 19:18:50,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4103, Invalid=4827, Unknown=0, NotChecked=0, Total=8930 [2022-03-20 19:18:50,625 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand has 95 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 93 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:18:53,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:18:53,689 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2022-03-20 19:18:53,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-20 19:18:53,690 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 93 states have internal predecessors, (97), 2 states have call successors, (3), 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 101 [2022-03-20 19:18:53,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:18:53,690 INFO L225 Difference]: With dead ends: 108 [2022-03-20 19:18:53,690 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 19:18:53,691 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4361 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12483, Invalid=22299, Unknown=0, NotChecked=0, Total=34782 [2022-03-20 19:18:53,691 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:18:53,692 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 67 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:18:53,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 19:18:53,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-20 19:18:53,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:18:53,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2022-03-20 19:18:53,696 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2022-03-20 19:18:53,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:18:53,696 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2022-03-20 19:18:53,696 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 93 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:18:53,696 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2022-03-20 19:18:53,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 19:18:53,696 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:18:53,696 INFO L499 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:18:53,696 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-03-20 19:18:53,696 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:18:53,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:18:53,697 INFO L85 PathProgramCache]: Analyzing trace with hash 26612568, now seen corresponding path program 90 times [2022-03-20 19:18:53,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:53,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1303171847] [2022-03-20 19:18:53,789 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:18:53,790 INFO L85 PathProgramCache]: Analyzing trace with hash 994371943, now seen corresponding path program 1 times [2022-03-20 19:18:53,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:18:53,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222089399] [2022-03-20 19:18:53,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:18:53,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:18:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:53,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:18:53,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:18:53,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:18:53,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222089399] [2022-03-20 19:18:53,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222089399] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:53,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:53,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:18:56,282 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:18:56,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1303171847] [2022-03-20 19:18:56,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1303171847] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:56,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:56,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-03-20 19:18:56,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322419424] [2022-03-20 19:18:56,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:18:56,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-20 19:18:56,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:56,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-20 19:18:56,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4194, Invalid=4926, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 19:18:56,284 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 96 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 94 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:18:58,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:18:58,771 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2022-03-20 19:18:58,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-20 19:18:58,771 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 94 states have internal predecessors, (98), 2 states have call successors, (3), 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 102 [2022-03-20 19:18:58,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:18:58,772 INFO L225 Difference]: With dead ends: 109 [2022-03-20 19:18:58,772 INFO L226 Difference]: Without dead ends: 104 [2022-03-20 19:18:58,774 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4455 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=12758, Invalid=22774, Unknown=0, NotChecked=0, Total=35532 [2022-03-20 19:18:58,774 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:18:58,774 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:18:58,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-20 19:18:58,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-03-20 19:18:58,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:18:58,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2022-03-20 19:18:58,778 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2022-03-20 19:18:58,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:18:58,778 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2022-03-20 19:18:58,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 94 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:18:58,778 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2022-03-20 19:18:58,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 19:18:58,779 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:18:58,779 INFO L499 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:18:58,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-03-20 19:18:58,779 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:18:58,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:18:58,779 INFO L85 PathProgramCache]: Analyzing trace with hash 860378438, now seen corresponding path program 91 times [2022-03-20 19:18:58,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:58,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2007508559] [2022-03-20 19:18:58,843 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:18:58,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1053477287, now seen corresponding path program 1 times [2022-03-20 19:18:58,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:18:58,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112646809] [2022-03-20 19:18:58,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:18:58,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:18:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:58,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:18:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:18:58,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:18:58,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112646809] [2022-03-20 19:18:58,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112646809] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:58,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:58,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:19:00,767 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:19:00,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2007508559] [2022-03-20 19:19:00,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2007508559] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:19:00,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:19:00,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-20 19:19:00,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227058415] [2022-03-20 19:19:00,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:19:00,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-20 19:19:00,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:19:00,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-20 19:19:00,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4286, Invalid=5026, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 19:19:00,770 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand has 97 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 95 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:03,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:19:03,186 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2022-03-20 19:19:03,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-20 19:19:03,187 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 95 states have internal predecessors, (99), 2 states have call successors, (3), 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 103 [2022-03-20 19:19:03,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:19:03,187 INFO L225 Difference]: With dead ends: 110 [2022-03-20 19:19:03,187 INFO L226 Difference]: Without dead ends: 105 [2022-03-20 19:19:03,189 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4550 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=13036, Invalid=23254, Unknown=0, NotChecked=0, Total=36290 [2022-03-20 19:19:03,189 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:19:03,189 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:19:03,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-20 19:19:03,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-03-20 19:19:03,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:03,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2022-03-20 19:19:03,193 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2022-03-20 19:19:03,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:19:03,193 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2022-03-20 19:19:03,194 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 95 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:03,194 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2022-03-20 19:19:03,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 19:19:03,194 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:19:03,194 INFO L499 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:19:03,194 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-03-20 19:19:03,194 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:19:03,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:19:03,194 INFO L85 PathProgramCache]: Analyzing trace with hash 937316632, now seen corresponding path program 92 times [2022-03-20 19:19:03,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:19:03,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1068749494] [2022-03-20 19:19:03,287 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:19:03,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1112582631, now seen corresponding path program 1 times [2022-03-20 19:19:03,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:19:03,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921769017] [2022-03-20 19:19:03,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:19:03,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:19:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:19:03,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:19:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:19:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:19:03,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:19:03,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921769017] [2022-03-20 19:19:03,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921769017] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:19:03,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:19:03,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:19:05,232 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:19:05,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1068749494] [2022-03-20 19:19:05,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1068749494] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:19:05,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:19:05,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-03-20 19:19:05,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884468227] [2022-03-20 19:19:05,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:19:05,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-20 19:19:05,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:19:05,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-20 19:19:05,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4379, Invalid=5127, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 19:19:05,234 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 98 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 96 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:08,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:19:08,609 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2022-03-20 19:19:08,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-20 19:19:08,609 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 96 states have internal predecessors, (100), 2 states have call successors, (3), 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 104 [2022-03-20 19:19:08,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:19:08,617 INFO L225 Difference]: With dead ends: 111 [2022-03-20 19:19:08,618 INFO L226 Difference]: Without dead ends: 106 [2022-03-20 19:19:08,619 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4646 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13317, Invalid=23739, Unknown=0, NotChecked=0, Total=37056 [2022-03-20 19:19:08,619 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:19:08,619 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:19:08,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-20 19:19:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-03-20 19:19:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.00990099009901) internal successors, (102), 101 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:08,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2022-03-20 19:19:08,638 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2022-03-20 19:19:08,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:19:08,638 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2022-03-20 19:19:08,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 96 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:08,638 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2022-03-20 19:19:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 19:19:08,639 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:19:08,639 INFO L499 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:19:08,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-03-20 19:19:08,639 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:19:08,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:19:08,639 INFO L85 PathProgramCache]: Analyzing trace with hash -972566650, now seen corresponding path program 93 times [2022-03-20 19:19:08,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:19:08,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [670553634] [2022-03-20 19:19:08,781 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:19:08,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1171687975, now seen corresponding path program 1 times [2022-03-20 19:19:08,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:19:08,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902887730] [2022-03-20 19:19:08,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:19:08,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:19:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:19:08,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:19:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:19:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:19:08,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:19:08,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902887730] [2022-03-20 19:19:08,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902887730] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:19:08,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:19:08,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:19:11,568 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:19:11,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [670553634] [2022-03-20 19:19:11,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [670553634] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:19:11,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:19:11,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-20 19:19:11,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252753106] [2022-03-20 19:19:11,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:19:11,569 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-20 19:19:11,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:19:11,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-20 19:19:11,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4473, Invalid=5229, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 19:19:11,570 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand has 99 states, 99 states have (on average 1.02020202020202) internal successors, (101), 97 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:14,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:19:14,062 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2022-03-20 19:19:14,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-20 19:19:14,063 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.02020202020202) internal successors, (101), 97 states have internal predecessors, (101), 2 states have call successors, (3), 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 105 [2022-03-20 19:19:14,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:19:14,063 INFO L225 Difference]: With dead ends: 112 [2022-03-20 19:19:14,063 INFO L226 Difference]: Without dead ends: 107 [2022-03-20 19:19:14,066 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4743 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13601, Invalid=24229, Unknown=0, NotChecked=0, Total=37830 [2022-03-20 19:19:14,066 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:19:14,066 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:19:14,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-20 19:19:14,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-03-20 19:19:14,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:14,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2022-03-20 19:19:14,070 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2022-03-20 19:19:14,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:19:14,070 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2022-03-20 19:19:14,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.02020202020202) internal successors, (101), 97 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:14,070 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2022-03-20 19:19:14,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-20 19:19:14,071 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:19:14,071 INFO L499 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:19:14,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-03-20 19:19:14,071 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:19:14,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:19:14,071 INFO L85 PathProgramCache]: Analyzing trace with hash -49406248, now seen corresponding path program 94 times [2022-03-20 19:19:14,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:19:14,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1456627708] [2022-03-20 19:19:14,176 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:19:14,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1230793319, now seen corresponding path program 1 times [2022-03-20 19:19:14,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:19:14,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522108019] [2022-03-20 19:19:14,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:19:14,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:19:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:19:14,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:19:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:19:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:19:14,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:19:14,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522108019] [2022-03-20 19:19:14,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522108019] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:19:14,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:19:14,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:19:17,148 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:19:17,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1456627708] [2022-03-20 19:19:17,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1456627708] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:19:17,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:19:17,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-03-20 19:19:17,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967198584] [2022-03-20 19:19:17,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:19:17,149 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-20 19:19:17,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:19:17,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-20 19:19:17,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4568, Invalid=5332, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 19:19:17,150 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 100 states, 100 states have (on average 1.02) internal successors, (102), 98 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:21,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:19:21,064 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2022-03-20 19:19:21,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-20 19:19:21,064 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.02) internal successors, (102), 98 states have internal predecessors, (102), 2 states have call successors, (3), 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 106 [2022-03-20 19:19:21,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:19:21,064 INFO L225 Difference]: With dead ends: 113 [2022-03-20 19:19:21,065 INFO L226 Difference]: Without dead ends: 108 [2022-03-20 19:19:21,067 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4841 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=13888, Invalid=24724, Unknown=0, NotChecked=0, Total=38612 [2022-03-20 19:19:21,067 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:19:21,067 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:19:21,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-20 19:19:21,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-03-20 19:19:21,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0097087378640777) internal successors, (104), 103 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:21,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2022-03-20 19:19:21,071 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2022-03-20 19:19:21,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:19:21,071 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2022-03-20 19:19:21,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.02) internal successors, (102), 98 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:21,071 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2022-03-20 19:19:21,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 19:19:21,072 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:19:21,072 INFO L499 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:19:21,072 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-03-20 19:19:21,072 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:19:21,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:19:21,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1496204858, now seen corresponding path program 95 times [2022-03-20 19:19:21,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:19:21,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1502947754] [2022-03-20 19:19:21,187 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:19:21,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1289898663, now seen corresponding path program 1 times [2022-03-20 19:19:21,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:19:21,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953129050] [2022-03-20 19:19:21,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:19:21,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:19:21,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:19:21,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:19:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:19:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:19:21,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:19:21,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953129050] [2022-03-20 19:19:21,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953129050] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:19:21,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:19:21,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:19:24,086 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:19:24,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1502947754] [2022-03-20 19:19:24,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1502947754] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:19:24,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:19:24,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-03-20 19:19:24,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32469668] [2022-03-20 19:19:24,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:19:24,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-03-20 19:19:24,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:19:24,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-03-20 19:19:24,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4664, Invalid=5436, Unknown=0, NotChecked=0, Total=10100 [2022-03-20 19:19:24,088 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand has 101 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 99 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:27,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:19:27,734 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2022-03-20 19:19:27,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-20 19:19:27,734 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 99 states have internal predecessors, (103), 2 states have call successors, (3), 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 107 [2022-03-20 19:19:27,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:19:27,734 INFO L225 Difference]: With dead ends: 114 [2022-03-20 19:19:27,734 INFO L226 Difference]: Without dead ends: 109 [2022-03-20 19:19:27,737 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4940 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=14178, Invalid=25224, Unknown=0, NotChecked=0, Total=39402 [2022-03-20 19:19:27,737 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:19:27,737 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:19:27,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-20 19:19:27,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-03-20 19:19:27,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:27,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2022-03-20 19:19:27,745 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2022-03-20 19:19:27,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:19:27,745 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2022-03-20 19:19:27,746 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 99 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:27,746 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2022-03-20 19:19:27,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 19:19:27,746 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:19:27,746 INFO L499 BasicCegarLoop]: trace histogram [96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:19:27,746 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-03-20 19:19:27,746 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:19:27,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:19:27,746 INFO L85 PathProgramCache]: Analyzing trace with hash 897678488, now seen corresponding path program 96 times [2022-03-20 19:19:27,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:19:27,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1307386468] [2022-03-20 19:19:27,808 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:19:27,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1349004007, now seen corresponding path program 1 times [2022-03-20 19:19:27,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:19:27,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451530614] [2022-03-20 19:19:27,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:19:27,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:19:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:19:27,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:19:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:19:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:19:27,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:19:27,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451530614] [2022-03-20 19:19:27,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451530614] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:19:27,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:19:27,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:19:29,921 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:19:29,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1307386468] [2022-03-20 19:19:29,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1307386468] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:19:29,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:19:29,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-03-20 19:19:29,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906415216] [2022-03-20 19:19:29,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:19:29,922 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-03-20 19:19:29,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:19:29,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-03-20 19:19:29,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4761, Invalid=5541, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 19:19:29,923 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 102 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 100 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:32,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:19:32,626 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2022-03-20 19:19:32,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-20 19:19:32,626 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 100 states have internal predecessors, (104), 2 states have call successors, (3), 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 108 [2022-03-20 19:19:32,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:19:32,627 INFO L225 Difference]: With dead ends: 115 [2022-03-20 19:19:32,627 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 19:19:32,631 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5040 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=14471, Invalid=25729, Unknown=0, NotChecked=0, Total=40200 [2022-03-20 19:19:32,631 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:19:32,631 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:19:32,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 19:19:32,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-20 19:19:32,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 105 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2022-03-20 19:19:32,635 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2022-03-20 19:19:32,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:19:32,635 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2022-03-20 19:19:32,635 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 100 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:32,636 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2022-03-20 19:19:32,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 19:19:32,636 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:19:32,636 INFO L499 BasicCegarLoop]: trace histogram [97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:19:32,636 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-03-20 19:19:32,636 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:19:32,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:19:32,636 INFO L85 PathProgramCache]: Analyzing trace with hash 2093618182, now seen corresponding path program 97 times [2022-03-20 19:19:32,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:19:32,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1777992137] [2022-03-20 19:19:32,835 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:19:32,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1408109351, now seen corresponding path program 1 times [2022-03-20 19:19:32,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:19:32,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290530745] [2022-03-20 19:19:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:19:32,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:19:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:19:32,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:19:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:19:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:19:32,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:19:32,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290530745] [2022-03-20 19:19:32,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290530745] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:19:32,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:19:32,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:19:35,739 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:19:35,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1777992137] [2022-03-20 19:19:35,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1777992137] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:19:35,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:19:35,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-03-20 19:19:35,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155012924] [2022-03-20 19:19:35,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:19:35,740 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-20 19:19:35,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:19:35,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-20 19:19:35,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4859, Invalid=5647, Unknown=0, NotChecked=0, Total=10506 [2022-03-20 19:19:35,741 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand has 103 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 101 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:39,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:19:39,917 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2022-03-20 19:19:39,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-20 19:19:39,917 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 101 states have internal predecessors, (105), 2 states have call successors, (3), 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 109 [2022-03-20 19:19:39,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:19:39,918 INFO L225 Difference]: With dead ends: 116 [2022-03-20 19:19:39,918 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 19:19:39,920 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5141 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=14767, Invalid=26239, Unknown=0, NotChecked=0, Total=41006 [2022-03-20 19:19:39,920 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:19:39,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:19:39,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 19:19:39,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-03-20 19:19:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:39,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2022-03-20 19:19:39,924 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2022-03-20 19:19:39,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:19:39,925 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2022-03-20 19:19:39,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 101 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:39,925 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2022-03-20 19:19:39,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 19:19:39,925 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:19:39,925 INFO L499 BasicCegarLoop]: trace histogram [98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:19:39,925 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-03-20 19:19:39,925 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:19:39,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:19:39,926 INFO L85 PathProgramCache]: Analyzing trace with hash 513043032, now seen corresponding path program 98 times [2022-03-20 19:19:39,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:19:39,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2094988925] [2022-03-20 19:19:40,065 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:19:40,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1467214695, now seen corresponding path program 1 times [2022-03-20 19:19:40,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:19:40,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196828475] [2022-03-20 19:19:40,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:19:40,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:19:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:19:40,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:19:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:19:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:19:40,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:19:40,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196828475] [2022-03-20 19:19:40,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196828475] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:19:40,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:19:40,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:19:43,696 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:19:43,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2094988925] [2022-03-20 19:19:43,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2094988925] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:19:43,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:19:43,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-03-20 19:19:43,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333895245] [2022-03-20 19:19:43,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:19:43,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-20 19:19:43,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:19:43,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-20 19:19:43,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4958, Invalid=5754, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 19:19:43,698 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 104 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 102 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:46,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:19:46,495 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2022-03-20 19:19:46,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-20 19:19:46,495 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 102 states have internal predecessors, (106), 2 states have call successors, (3), 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 110 [2022-03-20 19:19:46,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:19:46,496 INFO L225 Difference]: With dead ends: 117 [2022-03-20 19:19:46,496 INFO L226 Difference]: Without dead ends: 112 [2022-03-20 19:19:46,498 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5243 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=15066, Invalid=26754, Unknown=0, NotChecked=0, Total=41820 [2022-03-20 19:19:46,498 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:19:46,498 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:19:46,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-20 19:19:46,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-03-20 19:19:46,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0093457943925233) internal successors, (108), 107 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:46,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2022-03-20 19:19:46,502 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2022-03-20 19:19:46,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:19:46,502 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2022-03-20 19:19:46,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 102 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:46,503 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2022-03-20 19:19:46,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 19:19:46,505 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:19:46,505 INFO L499 BasicCegarLoop]: trace histogram [99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:19:46,505 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-03-20 19:19:46,506 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:19:46,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:19:46,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1240146362, now seen corresponding path program 99 times [2022-03-20 19:19:46,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:19:46,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1796133543] [2022-03-20 19:19:46,603 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:19:46,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1526320039, now seen corresponding path program 1 times [2022-03-20 19:19:46,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:19:46,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294903984] [2022-03-20 19:19:46,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:19:46,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:19:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:19:46,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:19:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:19:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:19:46,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:19:46,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294903984] [2022-03-20 19:19:46,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294903984] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:19:46,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:19:46,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:19:48,828 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:19:48,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1796133543] [2022-03-20 19:19:48,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1796133543] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:19:48,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:19:48,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-03-20 19:19:48,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037854168] [2022-03-20 19:19:48,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:19:48,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-20 19:19:48,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:19:48,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-20 19:19:48,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5058, Invalid=5862, Unknown=0, NotChecked=0, Total=10920 [2022-03-20 19:19:48,849 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand has 105 states, 105 states have (on average 1.019047619047619) internal successors, (107), 103 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:51,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:19:51,748 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2022-03-20 19:19:51,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-20 19:19:51,748 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.019047619047619) internal successors, (107), 103 states have internal predecessors, (107), 2 states have call successors, (3), 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 111 [2022-03-20 19:19:51,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:19:51,749 INFO L225 Difference]: With dead ends: 118 [2022-03-20 19:19:51,749 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 19:19:51,752 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5346 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=15368, Invalid=27274, Unknown=0, NotChecked=0, Total=42642 [2022-03-20 19:19:51,752 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:19:51,752 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:19:51,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 19:19:51,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-03-20 19:19:51,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:51,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2022-03-20 19:19:51,756 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2022-03-20 19:19:51,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:19:51,756 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2022-03-20 19:19:51,756 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.019047619047619) internal successors, (107), 103 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:51,756 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2022-03-20 19:19:51,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-03-20 19:19:51,757 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:19:51,757 INFO L499 BasicCegarLoop]: trace histogram [100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:19:51,757 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-03-20 19:19:51,757 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:19:51,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:19:51,757 INFO L85 PathProgramCache]: Analyzing trace with hash 245557272, now seen corresponding path program 100 times [2022-03-20 19:19:51,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:19:51,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [467305892] [2022-03-20 19:19:51,852 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:19:51,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1585425383, now seen corresponding path program 1 times [2022-03-20 19:19:51,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:19:51,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857634110] [2022-03-20 19:19:51,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:19:51,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:19:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:19:51,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:19:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:19:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:19:51,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:19:51,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857634110] [2022-03-20 19:19:51,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857634110] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:19:51,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:19:51,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:19:54,129 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:19:54,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [467305892] [2022-03-20 19:19:54,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [467305892] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:19:54,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:19:54,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-03-20 19:19:54,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539718930] [2022-03-20 19:19:54,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:19:54,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-03-20 19:19:54,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:19:54,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-03-20 19:19:54,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5159, Invalid=5971, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 19:19:54,131 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 106 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 104 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:57,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:19:57,330 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2022-03-20 19:19:57,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-20 19:19:57,330 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 104 states have internal predecessors, (108), 2 states have call successors, (3), 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 112 [2022-03-20 19:19:57,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:19:57,331 INFO L225 Difference]: With dead ends: 119 [2022-03-20 19:19:57,331 INFO L226 Difference]: Without dead ends: 114 [2022-03-20 19:19:57,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5450 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=15673, Invalid=27799, Unknown=0, NotChecked=0, Total=43472 [2022-03-20 19:19:57,333 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:19:57,333 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:19:57,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-20 19:19:57,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-03-20 19:19:57,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.0091743119266054) internal successors, (110), 109 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:57,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2022-03-20 19:19:57,337 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2022-03-20 19:19:57,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:19:57,337 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2022-03-20 19:19:57,337 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 104 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:19:57,337 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2022-03-20 19:19:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 19:19:57,337 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:19:57,338 INFO L499 BasicCegarLoop]: trace histogram [101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:19:57,338 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-03-20 19:19:57,338 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:19:57,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:19:57,338 INFO L85 PathProgramCache]: Analyzing trace with hash -942270330, now seen corresponding path program 101 times [2022-03-20 19:19:57,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:19:57,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [26474273] [2022-03-20 19:19:57,467 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:19:57,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1644530727, now seen corresponding path program 1 times [2022-03-20 19:19:57,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:19:57,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289666556] [2022-03-20 19:19:57,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:19:57,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:19:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:19:57,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:19:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:19:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:19:57,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:19:57,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289666556] [2022-03-20 19:19:57,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289666556] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:19:57,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:19:57,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:20:00,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:20:00,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [26474273] [2022-03-20 19:20:00,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [26474273] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:20:00,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:20:00,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-03-20 19:20:00,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935591729] [2022-03-20 19:20:00,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:20:00,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-03-20 19:20:00,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:20:00,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-03-20 19:20:00,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5261, Invalid=6081, Unknown=0, NotChecked=0, Total=11342 [2022-03-20 19:20:00,881 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand has 107 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 105 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:03,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:20:03,800 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2022-03-20 19:20:03,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-20 19:20:03,800 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 105 states have internal predecessors, (109), 2 states have call successors, (3), 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 113 [2022-03-20 19:20:03,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:20:03,805 INFO L225 Difference]: With dead ends: 120 [2022-03-20 19:20:03,805 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 19:20:03,807 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5555 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=15981, Invalid=28329, Unknown=0, NotChecked=0, Total=44310 [2022-03-20 19:20:03,807 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:20:03,807 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:20:03,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 19:20:03,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-03-20 19:20:03,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:03,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2022-03-20 19:20:03,836 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2022-03-20 19:20:03,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:20:03,836 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2022-03-20 19:20:03,836 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 105 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:03,836 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2022-03-20 19:20:03,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-20 19:20:03,837 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:20:03,837 INFO L499 BasicCegarLoop]: trace histogram [102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:20:03,837 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-03-20 19:20:03,837 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:20:03,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:20:03,837 INFO L85 PathProgramCache]: Analyzing trace with hash 889779672, now seen corresponding path program 102 times [2022-03-20 19:20:03,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:20:03,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [421774445] [2022-03-20 19:20:03,933 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:20:03,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1703636071, now seen corresponding path program 1 times [2022-03-20 19:20:03,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:20:03,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261705463] [2022-03-20 19:20:03,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:20:03,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:20:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:20:03,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:20:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:20:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:20:03,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:20:03,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261705463] [2022-03-20 19:20:03,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261705463] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:20:03,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:20:03,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:20:06,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:20:06,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [421774445] [2022-03-20 19:20:06,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [421774445] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:20:06,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:20:06,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-03-20 19:20:06,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079947692] [2022-03-20 19:20:06,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:20:06,776 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-03-20 19:20:06,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:20:06,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-03-20 19:20:06,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5364, Invalid=6192, Unknown=0, NotChecked=0, Total=11556 [2022-03-20 19:20:06,779 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand has 108 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 106 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:11,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:20:11,408 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2022-03-20 19:20:11,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-20 19:20:11,409 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 106 states have internal predecessors, (110), 2 states have call successors, (3), 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 114 [2022-03-20 19:20:11,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:20:11,409 INFO L225 Difference]: With dead ends: 121 [2022-03-20 19:20:11,409 INFO L226 Difference]: Without dead ends: 116 [2022-03-20 19:20:11,412 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5661 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=16292, Invalid=28864, Unknown=0, NotChecked=0, Total=45156 [2022-03-20 19:20:11,412 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:20:11,412 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:20:11,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-20 19:20:11,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-03-20 19:20:11,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.009009009009009) internal successors, (112), 111 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:11,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2022-03-20 19:20:11,416 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2022-03-20 19:20:11,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:20:11,417 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2022-03-20 19:20:11,417 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 106 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:11,417 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2022-03-20 19:20:11,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 19:20:11,417 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:20:11,417 INFO L499 BasicCegarLoop]: trace histogram [103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:20:11,417 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-03-20 19:20:11,417 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:20:11,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:20:11,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1848754886, now seen corresponding path program 103 times [2022-03-20 19:20:11,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:20:11,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [777542081] [2022-03-20 19:20:11,569 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:20:11,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1762741415, now seen corresponding path program 1 times [2022-03-20 19:20:11,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:20:11,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907246658] [2022-03-20 19:20:11,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:20:11,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:20:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:20:11,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:20:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:20:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:20:11,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:20:11,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907246658] [2022-03-20 19:20:11,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907246658] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:20:11,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:20:11,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:20:14,256 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:20:14,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [777542081] [2022-03-20 19:20:14,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [777542081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:20:14,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:20:14,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-03-20 19:20:14,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579833207] [2022-03-20 19:20:14,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:20:14,257 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-03-20 19:20:14,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:20:14,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-03-20 19:20:14,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5468, Invalid=6304, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 19:20:14,258 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand has 109 states, 109 states have (on average 1.018348623853211) internal successors, (111), 107 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:17,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:20:17,259 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2022-03-20 19:20:17,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-20 19:20:17,259 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.018348623853211) internal successors, (111), 107 states have internal predecessors, (111), 2 states have call successors, (3), 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 115 [2022-03-20 19:20:17,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:20:17,260 INFO L225 Difference]: With dead ends: 122 [2022-03-20 19:20:17,260 INFO L226 Difference]: Without dead ends: 117 [2022-03-20 19:20:17,261 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5768 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=16606, Invalid=29404, Unknown=0, NotChecked=0, Total=46010 [2022-03-20 19:20:17,262 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:20:17,262 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:20:17,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-20 19:20:17,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-03-20 19:20:17,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0089285714285714) internal successors, (113), 112 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:17,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2022-03-20 19:20:17,266 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2022-03-20 19:20:17,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:20:17,266 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2022-03-20 19:20:17,266 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.018348623853211) internal successors, (111), 107 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:17,266 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2022-03-20 19:20:17,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 19:20:17,267 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:20:17,267 INFO L499 BasicCegarLoop]: trace histogram [104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:20:17,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-03-20 19:20:17,267 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:20:17,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:20:17,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1512215448, now seen corresponding path program 104 times [2022-03-20 19:20:17,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:20:17,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1931823297] [2022-03-20 19:20:17,375 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:20:17,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846759, now seen corresponding path program 1 times [2022-03-20 19:20:17,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:20:17,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539708580] [2022-03-20 19:20:17,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:20:17,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:20:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:20:17,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:20:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:20:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:20:17,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:20:17,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539708580] [2022-03-20 19:20:17,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539708580] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:20:17,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:20:17,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:20:20,226 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:20:20,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1931823297] [2022-03-20 19:20:20,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1931823297] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:20:20,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:20:20,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-03-20 19:20:20,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089049867] [2022-03-20 19:20:20,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:20:20,227 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-03-20 19:20:20,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:20:20,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-03-20 19:20:20,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5573, Invalid=6417, Unknown=0, NotChecked=0, Total=11990 [2022-03-20 19:20:20,228 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 110 states, 110 states have (on average 1.018181818181818) internal successors, (112), 108 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:23,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:20:23,209 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2022-03-20 19:20:23,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-03-20 19:20:23,209 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.018181818181818) internal successors, (112), 108 states have internal predecessors, (112), 2 states have call successors, (3), 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 116 [2022-03-20 19:20:23,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:20:23,209 INFO L225 Difference]: With dead ends: 123 [2022-03-20 19:20:23,209 INFO L226 Difference]: Without dead ends: 118 [2022-03-20 19:20:23,212 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5876 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=16923, Invalid=29949, Unknown=0, NotChecked=0, Total=46872 [2022-03-20 19:20:23,212 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:20:23,212 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:20:23,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-20 19:20:23,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-03-20 19:20:23,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.008849557522124) internal successors, (114), 113 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:23,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2022-03-20 19:20:23,218 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2022-03-20 19:20:23,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:20:23,218 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2022-03-20 19:20:23,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.018181818181818) internal successors, (112), 108 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:23,218 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2022-03-20 19:20:23,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 19:20:23,218 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:20:23,218 INFO L499 BasicCegarLoop]: trace histogram [105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:20:23,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-03-20 19:20:23,219 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:20:23,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:20:23,219 INFO L85 PathProgramCache]: Analyzing trace with hash -330572538, now seen corresponding path program 105 times [2022-03-20 19:20:23,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:20:23,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [774195779] [2022-03-20 19:20:23,282 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:20:23,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1880952103, now seen corresponding path program 1 times [2022-03-20 19:20:23,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:20:23,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567505071] [2022-03-20 19:20:23,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:20:23,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:20:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:20:23,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:20:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:20:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:20:23,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:20:23,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567505071] [2022-03-20 19:20:23,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567505071] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:20:23,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:20:23,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:20:26,387 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:20:26,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [774195779] [2022-03-20 19:20:26,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [774195779] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:20:26,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:20:26,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-03-20 19:20:26,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649542155] [2022-03-20 19:20:26,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:20:26,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-03-20 19:20:26,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:20:26,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-03-20 19:20:26,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5679, Invalid=6531, Unknown=0, NotChecked=0, Total=12210 [2022-03-20 19:20:26,389 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand has 111 states, 111 states have (on average 1.018018018018018) internal successors, (113), 109 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:29,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:20:29,547 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2022-03-20 19:20:29,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-20 19:20:29,548 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.018018018018018) internal successors, (113), 109 states have internal predecessors, (113), 2 states have call successors, (3), 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 117 [2022-03-20 19:20:29,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:20:29,556 INFO L225 Difference]: With dead ends: 124 [2022-03-20 19:20:29,556 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 19:20:29,557 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5985 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=17243, Invalid=30499, Unknown=0, NotChecked=0, Total=47742 [2022-03-20 19:20:29,558 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:20:29,558 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:20:29,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 19:20:29,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-03-20 19:20:29,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 114 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:29,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2022-03-20 19:20:29,563 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2022-03-20 19:20:29,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:20:29,563 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2022-03-20 19:20:29,563 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.018018018018018) internal successors, (113), 109 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:29,563 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2022-03-20 19:20:29,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-20 19:20:29,565 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:20:29,565 INFO L499 BasicCegarLoop]: trace histogram [106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:20:29,565 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-03-20 19:20:29,565 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:20:29,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:20:29,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1622425256, now seen corresponding path program 106 times [2022-03-20 19:20:29,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:20:29,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [104836334] [2022-03-20 19:20:29,686 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:20:29,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1940057447, now seen corresponding path program 1 times [2022-03-20 19:20:29,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:20:29,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575277274] [2022-03-20 19:20:29,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:20:29,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:20:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:20:29,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:20:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:20:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:20:29,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:20:29,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575277274] [2022-03-20 19:20:29,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575277274] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:20:29,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:20:29,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:20:32,278 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:20:32,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [104836334] [2022-03-20 19:20:32,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [104836334] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:20:32,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:20:32,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-03-20 19:20:32,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459523548] [2022-03-20 19:20:32,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:20:32,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-03-20 19:20:32,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:20:32,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-03-20 19:20:32,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5786, Invalid=6646, Unknown=0, NotChecked=0, Total=12432 [2022-03-20 19:20:32,281 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 112 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 110 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:35,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:20:35,439 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2022-03-20 19:20:35,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-03-20 19:20:35,440 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 110 states have internal predecessors, (114), 2 states have call successors, (3), 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 118 [2022-03-20 19:20:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:20:35,440 INFO L225 Difference]: With dead ends: 125 [2022-03-20 19:20:35,440 INFO L226 Difference]: Without dead ends: 120 [2022-03-20 19:20:35,442 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6095 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=17566, Invalid=31054, Unknown=0, NotChecked=0, Total=48620 [2022-03-20 19:20:35,443 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:20:35,443 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:20:35,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-20 19:20:35,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-03-20 19:20:35,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.008695652173913) internal successors, (116), 115 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:35,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2022-03-20 19:20:35,448 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2022-03-20 19:20:35,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:20:35,448 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2022-03-20 19:20:35,448 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 110 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:35,449 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2022-03-20 19:20:35,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-20 19:20:35,449 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:20:35,449 INFO L499 BasicCegarLoop]: trace histogram [107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:20:35,449 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-03-20 19:20:35,449 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:20:35,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:20:35,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1279813446, now seen corresponding path program 107 times [2022-03-20 19:20:35,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:20:35,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [787095700] [2022-03-20 19:20:35,544 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:20:35,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1999162791, now seen corresponding path program 1 times [2022-03-20 19:20:35,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:20:35,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725327484] [2022-03-20 19:20:35,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:20:35,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:20:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:20:35,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:20:35,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:20:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:20:35,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:20:35,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725327484] [2022-03-20 19:20:35,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725327484] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:20:35,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:20:35,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:20:38,219 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:20:38,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [787095700] [2022-03-20 19:20:38,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [787095700] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:20:38,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:20:38,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-03-20 19:20:38,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639626249] [2022-03-20 19:20:38,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:20:38,220 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-03-20 19:20:38,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:20:38,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-03-20 19:20:38,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5894, Invalid=6762, Unknown=0, NotChecked=0, Total=12656 [2022-03-20 19:20:38,221 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand has 113 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 111 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:41,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:20:41,982 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2022-03-20 19:20:41,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-20 19:20:41,983 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 111 states have internal predecessors, (115), 2 states have call successors, (3), 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 119 [2022-03-20 19:20:41,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:20:41,983 INFO L225 Difference]: With dead ends: 126 [2022-03-20 19:20:41,983 INFO L226 Difference]: Without dead ends: 121 [2022-03-20 19:20:41,985 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6206 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=17892, Invalid=31614, Unknown=0, NotChecked=0, Total=49506 [2022-03-20 19:20:41,985 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:20:41,987 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:20:41,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-20 19:20:41,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-03-20 19:20:41,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:41,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2022-03-20 19:20:41,992 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2022-03-20 19:20:41,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:20:41,992 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2022-03-20 19:20:41,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 111 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:41,992 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2022-03-20 19:20:41,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-03-20 19:20:41,992 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:20:41,992 INFO L499 BasicCegarLoop]: trace histogram [108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:20:41,992 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-03-20 19:20:41,993 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:20:41,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:20:41,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1054899992, now seen corresponding path program 108 times [2022-03-20 19:20:41,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:20:41,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [232196666] [2022-03-20 19:20:42,063 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:20:42,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2058268135, now seen corresponding path program 1 times [2022-03-20 19:20:42,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:20:42,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278990036] [2022-03-20 19:20:42,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:20:42,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:20:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:20:42,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:20:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:20:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:20:42,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:20:42,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278990036] [2022-03-20 19:20:42,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278990036] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:20:42,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:20:42,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:20:44,687 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:20:44,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [232196666] [2022-03-20 19:20:44,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [232196666] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:20:44,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:20:44,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-03-20 19:20:44,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247731611] [2022-03-20 19:20:44,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:20:44,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-03-20 19:20:44,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:20:44,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-03-20 19:20:44,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6003, Invalid=6879, Unknown=0, NotChecked=0, Total=12882 [2022-03-20 19:20:44,690 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand has 114 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 112 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:48,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:20:48,053 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2022-03-20 19:20:48,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-03-20 19:20:48,053 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 112 states have internal predecessors, (116), 2 states have call successors, (3), 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 120 [2022-03-20 19:20:48,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:20:48,054 INFO L225 Difference]: With dead ends: 127 [2022-03-20 19:20:48,054 INFO L226 Difference]: Without dead ends: 122 [2022-03-20 19:20:48,057 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6318 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=18221, Invalid=32179, Unknown=0, NotChecked=0, Total=50400 [2022-03-20 19:20:48,057 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:20:48,057 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:20:48,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-20 19:20:48,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-03-20 19:20:48,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0085470085470085) internal successors, (118), 117 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:48,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2022-03-20 19:20:48,062 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2022-03-20 19:20:48,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:20:48,062 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2022-03-20 19:20:48,062 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 112 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:48,062 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2022-03-20 19:20:48,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 19:20:48,062 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:20:48,062 INFO L499 BasicCegarLoop]: trace histogram [109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:20:48,063 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-03-20 19:20:48,063 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:20:48,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:20:48,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1622449786, now seen corresponding path program 109 times [2022-03-20 19:20:48,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:20:48,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1860546066] [2022-03-20 19:20:48,123 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:20:48,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2117373479, now seen corresponding path program 1 times [2022-03-20 19:20:48,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:20:48,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548885823] [2022-03-20 19:20:48,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:20:48,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:20:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:20:48,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:20:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:20:48,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:20:48,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:20:48,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548885823] [2022-03-20 19:20:48,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548885823] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:20:48,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:20:48,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:20:51,133 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:20:51,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1860546066] [2022-03-20 19:20:51,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1860546066] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:20:51,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:20:51,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-03-20 19:20:51,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381259636] [2022-03-20 19:20:51,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:20:51,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-03-20 19:20:51,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:20:51,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-03-20 19:20:51,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6113, Invalid=6997, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 19:20:51,135 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand has 115 states, 115 states have (on average 1.017391304347826) internal successors, (117), 113 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:56,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:20:56,004 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2022-03-20 19:20:56,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-20 19:20:56,005 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.017391304347826) internal successors, (117), 113 states have internal predecessors, (117), 2 states have call successors, (3), 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 121 [2022-03-20 19:20:56,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:20:56,005 INFO L225 Difference]: With dead ends: 128 [2022-03-20 19:20:56,005 INFO L226 Difference]: Without dead ends: 123 [2022-03-20 19:20:56,008 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6431 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=18553, Invalid=32749, Unknown=0, NotChecked=0, Total=51302 [2022-03-20 19:20:56,008 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:20:56,008 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 67 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:20:56,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-20 19:20:56,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-03-20 19:20:56,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 118 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:56,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2022-03-20 19:20:56,013 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 121 [2022-03-20 19:20:56,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:20:56,013 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2022-03-20 19:20:56,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.017391304347826) internal successors, (117), 113 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:20:56,013 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2022-03-20 19:20:56,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 19:20:56,014 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:20:56,014 INFO L499 BasicCegarLoop]: trace histogram [110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:20:56,014 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-03-20 19:20:56,014 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:20:56,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:20:56,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1279053016, now seen corresponding path program 110 times [2022-03-20 19:20:56,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:20:56,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1614163520] [2022-03-20 19:20:56,114 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:20:56,114 INFO L85 PathProgramCache]: Analyzing trace with hash -2118488473, now seen corresponding path program 1 times [2022-03-20 19:20:56,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:20:56,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919344013] [2022-03-20 19:20:56,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:20:56,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:20:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:20:56,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:20:56,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:20:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:20:56,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:20:56,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919344013] [2022-03-20 19:20:56,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919344013] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:20:56,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:20:56,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:21:00,224 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:21:00,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1614163520] [2022-03-20 19:21:00,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1614163520] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:21:00,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:21:00,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-03-20 19:21:00,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105547178] [2022-03-20 19:21:00,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:21:00,225 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-03-20 19:21:00,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:21:00,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-03-20 19:21:00,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6224, Invalid=7116, Unknown=0, NotChecked=0, Total=13340 [2022-03-20 19:21:00,227 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand has 116 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 114 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:04,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:21:04,292 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2022-03-20 19:21:04,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-20 19:21:04,292 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 114 states have internal predecessors, (118), 2 states have call successors, (3), 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 122 [2022-03-20 19:21:04,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:21:04,292 INFO L225 Difference]: With dead ends: 129 [2022-03-20 19:21:04,292 INFO L226 Difference]: Without dead ends: 124 [2022-03-20 19:21:04,295 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6545 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=18888, Invalid=33324, Unknown=0, NotChecked=0, Total=52212 [2022-03-20 19:21:04,295 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:21:04,295 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:21:04,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-20 19:21:04,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-03-20 19:21:04,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0084033613445378) internal successors, (120), 119 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:04,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2022-03-20 19:21:04,315 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 122 [2022-03-20 19:21:04,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:21:04,315 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2022-03-20 19:21:04,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 114 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:04,315 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2022-03-20 19:21:04,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-20 19:21:04,315 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:21:04,315 INFO L499 BasicCegarLoop]: trace histogram [111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:21:04,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-03-20 19:21:04,315 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:21:04,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:21:04,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1031326662, now seen corresponding path program 111 times [2022-03-20 19:21:04,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:21:04,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2060378515] [2022-03-20 19:21:04,416 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:21:04,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2059383129, now seen corresponding path program 1 times [2022-03-20 19:21:04,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:21:04,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633280188] [2022-03-20 19:21:04,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:21:04,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:21:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:21:04,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:21:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:21:04,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:21:04,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:21:04,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633280188] [2022-03-20 19:21:04,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633280188] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:21:04,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:21:04,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:21:07,409 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:21:07,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2060378515] [2022-03-20 19:21:07,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2060378515] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:21:07,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:21:07,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-03-20 19:21:07,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341526632] [2022-03-20 19:21:07,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:21:07,410 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-03-20 19:21:07,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:21:07,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-03-20 19:21:07,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6336, Invalid=7236, Unknown=0, NotChecked=0, Total=13572 [2022-03-20 19:21:07,412 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand has 117 states, 117 states have (on average 1.017094017094017) internal successors, (119), 115 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:12,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:21:12,788 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2022-03-20 19:21:12,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-03-20 19:21:12,788 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.017094017094017) internal successors, (119), 115 states have internal predecessors, (119), 2 states have call successors, (3), 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 123 [2022-03-20 19:21:12,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:21:12,789 INFO L225 Difference]: With dead ends: 130 [2022-03-20 19:21:12,789 INFO L226 Difference]: Without dead ends: 125 [2022-03-20 19:21:12,791 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6660 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=19226, Invalid=33904, Unknown=0, NotChecked=0, Total=53130 [2022-03-20 19:21:12,791 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:21:12,791 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:21:12,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-20 19:21:12,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-03-20 19:21:12,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:12,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2022-03-20 19:21:12,796 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 123 [2022-03-20 19:21:12,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:21:12,796 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2022-03-20 19:21:12,797 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.017094017094017) internal successors, (119), 115 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:12,797 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2022-03-20 19:21:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 19:21:12,797 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:21:12,797 INFO L499 BasicCegarLoop]: trace histogram [112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:21:12,797 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-03-20 19:21:12,797 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:21:12,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:21:12,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1941744280, now seen corresponding path program 112 times [2022-03-20 19:21:12,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:21:12,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [460451314] [2022-03-20 19:21:12,949 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:21:12,949 INFO L85 PathProgramCache]: Analyzing trace with hash -2000277785, now seen corresponding path program 1 times [2022-03-20 19:21:12,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:21:12,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677890423] [2022-03-20 19:21:12,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:21:12,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:21:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:21:12,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:21:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:21:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:21:12,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:21:12,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677890423] [2022-03-20 19:21:12,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677890423] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:21:12,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:21:12,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:21:16,347 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:21:16,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [460451314] [2022-03-20 19:21:16,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [460451314] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:21:16,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:21:16,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-03-20 19:21:16,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104917506] [2022-03-20 19:21:16,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:21:16,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-03-20 19:21:16,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:21:16,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-03-20 19:21:16,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6449, Invalid=7357, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 19:21:16,349 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand has 118 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 116 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:19,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:21:19,799 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2022-03-20 19:21:19,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-03-20 19:21:19,799 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 116 states have internal predecessors, (120), 2 states have call successors, (3), 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 124 [2022-03-20 19:21:19,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:21:19,800 INFO L225 Difference]: With dead ends: 131 [2022-03-20 19:21:19,800 INFO L226 Difference]: Without dead ends: 126 [2022-03-20 19:21:19,802 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6776 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=19567, Invalid=34489, Unknown=0, NotChecked=0, Total=54056 [2022-03-20 19:21:19,802 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:21:19,802 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 67 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:21:19,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-20 19:21:19,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-03-20 19:21:19,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.0082644628099173) internal successors, (122), 121 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:19,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2022-03-20 19:21:19,831 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 124 [2022-03-20 19:21:19,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:21:19,832 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2022-03-20 19:21:19,832 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 116 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:19,832 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2022-03-20 19:21:19,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-20 19:21:19,832 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:21:19,832 INFO L499 BasicCegarLoop]: trace histogram [113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:21:19,832 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-03-20 19:21:19,832 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:21:19,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:21:19,832 INFO L85 PathProgramCache]: Analyzing trace with hash 99919366, now seen corresponding path program 113 times [2022-03-20 19:21:19,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:21:19,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1783834025] [2022-03-20 19:21:19,928 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:21:19,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1941172441, now seen corresponding path program 1 times [2022-03-20 19:21:19,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:21:19,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123920783] [2022-03-20 19:21:19,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:21:19,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:21:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:21:19,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:21:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:21:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:21:19,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:21:19,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123920783] [2022-03-20 19:21:19,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123920783] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:21:19,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:21:19,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:21:24,436 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:21:24,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1783834025] [2022-03-20 19:21:24,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1783834025] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:21:24,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:21:24,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-03-20 19:21:24,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450751186] [2022-03-20 19:21:24,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:21:24,437 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-03-20 19:21:24,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:21:24,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-03-20 19:21:24,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6563, Invalid=7479, Unknown=0, NotChecked=0, Total=14042 [2022-03-20 19:21:24,439 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand has 119 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 117 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:28,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:21:28,295 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2022-03-20 19:21:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-03-20 19:21:28,295 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 117 states have internal predecessors, (121), 2 states have call successors, (3), 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 125 [2022-03-20 19:21:28,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:21:28,295 INFO L225 Difference]: With dead ends: 132 [2022-03-20 19:21:28,295 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 19:21:28,298 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6893 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=19911, Invalid=35079, Unknown=0, NotChecked=0, Total=54990 [2022-03-20 19:21:28,298 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:21:28,298 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:21:28,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 19:21:28,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-03-20 19:21:28,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 122 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:28,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2022-03-20 19:21:28,304 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 125 [2022-03-20 19:21:28,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:21:28,304 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2022-03-20 19:21:28,304 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 117 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:28,304 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2022-03-20 19:21:28,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-03-20 19:21:28,304 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:21:28,304 INFO L499 BasicCegarLoop]: trace histogram [114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:21:28,304 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-03-20 19:21:28,305 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:21:28,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:21:28,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1162078120, now seen corresponding path program 114 times [2022-03-20 19:21:28,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:21:28,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [736268658] [2022-03-20 19:21:28,371 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:21:28,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1882067097, now seen corresponding path program 1 times [2022-03-20 19:21:28,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:21:28,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944003039] [2022-03-20 19:21:28,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:21:28,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:21:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:21:28,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:21:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:21:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:21:28,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:21:28,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944003039] [2022-03-20 19:21:28,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944003039] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:21:28,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:21:28,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:21:31,789 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:21:31,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [736268658] [2022-03-20 19:21:31,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [736268658] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:21:31,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:21:31,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-03-20 19:21:31,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648611186] [2022-03-20 19:21:31,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:21:31,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-03-20 19:21:31,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:21:31,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-03-20 19:21:31,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6678, Invalid=7602, Unknown=0, NotChecked=0, Total=14280 [2022-03-20 19:21:31,791 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand has 120 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 118 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:36,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:21:36,911 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2022-03-20 19:21:36,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-03-20 19:21:36,911 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 118 states have internal predecessors, (122), 2 states have call successors, (3), 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 126 [2022-03-20 19:21:36,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:21:36,912 INFO L225 Difference]: With dead ends: 133 [2022-03-20 19:21:36,912 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 19:21:36,914 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7011 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=20258, Invalid=35674, Unknown=0, NotChecked=0, Total=55932 [2022-03-20 19:21:36,914 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:21:36,914 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:21:36,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 19:21:36,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-03-20 19:21:36,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.008130081300813) internal successors, (124), 123 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:36,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2022-03-20 19:21:36,919 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 126 [2022-03-20 19:21:36,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:21:36,919 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2022-03-20 19:21:36,919 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 118 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:36,919 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2022-03-20 19:21:36,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 19:21:36,920 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:21:36,920 INFO L499 BasicCegarLoop]: trace histogram [115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:21:36,920 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-03-20 19:21:36,920 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:21:36,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:21:36,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1629294522, now seen corresponding path program 115 times [2022-03-20 19:21:36,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:21:36,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1869549244] [2022-03-20 19:21:37,017 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:21:37,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1822961753, now seen corresponding path program 1 times [2022-03-20 19:21:37,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:21:37,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125777490] [2022-03-20 19:21:37,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:21:37,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:21:37,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:21:37,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:21:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:21:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:21:37,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:21:37,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125777490] [2022-03-20 19:21:37,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125777490] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:21:37,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:21:37,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:21:40,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:21:40,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1869549244] [2022-03-20 19:21:40,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1869549244] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:21:40,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:21:40,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-03-20 19:21:40,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951555690] [2022-03-20 19:21:40,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:21:40,309 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-03-20 19:21:40,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:21:40,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-03-20 19:21:40,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6794, Invalid=7726, Unknown=0, NotChecked=0, Total=14520 [2022-03-20 19:21:40,311 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand has 121 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 119 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:44,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:21:44,193 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2022-03-20 19:21:44,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-03-20 19:21:44,193 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 119 states have internal predecessors, (123), 2 states have call successors, (3), 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 127 [2022-03-20 19:21:44,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:21:44,194 INFO L225 Difference]: With dead ends: 134 [2022-03-20 19:21:44,194 INFO L226 Difference]: Without dead ends: 129 [2022-03-20 19:21:44,196 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7130 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=20608, Invalid=36274, Unknown=0, NotChecked=0, Total=56882 [2022-03-20 19:21:44,197 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:21:44,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:21:44,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-20 19:21:44,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-03-20 19:21:44,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0080645161290323) internal successors, (125), 124 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:44,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2022-03-20 19:21:44,202 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 127 [2022-03-20 19:21:44,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:21:44,202 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2022-03-20 19:21:44,202 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 119 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:44,202 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2022-03-20 19:21:44,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 19:21:44,202 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:21:44,202 INFO L499 BasicCegarLoop]: trace histogram [116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:21:44,202 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-03-20 19:21:44,203 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:21:44,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:21:44,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1066866200, now seen corresponding path program 116 times [2022-03-20 19:21:44,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:21:44,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [189410988] [2022-03-20 19:21:44,272 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:21:44,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1763856409, now seen corresponding path program 1 times [2022-03-20 19:21:44,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:21:44,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806207632] [2022-03-20 19:21:44,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:21:44,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:21:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:21:44,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:21:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:21:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:21:44,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:21:44,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806207632] [2022-03-20 19:21:44,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806207632] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:21:44,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:21:44,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:21:47,674 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:21:47,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [189410988] [2022-03-20 19:21:47,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [189410988] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:21:47,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:21:47,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-03-20 19:21:47,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885005520] [2022-03-20 19:21:47,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:21:47,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-03-20 19:21:47,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:21:47,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-03-20 19:21:47,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6911, Invalid=7851, Unknown=0, NotChecked=0, Total=14762 [2022-03-20 19:21:47,677 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 122 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 120 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:52,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:21:52,088 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2022-03-20 19:21:52,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-03-20 19:21:52,088 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 120 states have internal predecessors, (124), 2 states have call successors, (3), 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 128 [2022-03-20 19:21:52,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:21:52,089 INFO L225 Difference]: With dead ends: 135 [2022-03-20 19:21:52,089 INFO L226 Difference]: Without dead ends: 130 [2022-03-20 19:21:52,092 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7250 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=20961, Invalid=36879, Unknown=0, NotChecked=0, Total=57840 [2022-03-20 19:21:52,092 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:21:52,092 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:21:52,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-20 19:21:52,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-03-20 19:21:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.008) internal successors, (126), 125 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:52,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2022-03-20 19:21:52,097 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 128 [2022-03-20 19:21:52,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:21:52,097 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2022-03-20 19:21:52,097 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 120 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:52,097 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2022-03-20 19:21:52,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 19:21:52,098 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:21:52,098 INFO L499 BasicCegarLoop]: trace histogram [117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:21:52,098 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-03-20 19:21:52,098 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:21:52,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:21:52,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1251497338, now seen corresponding path program 117 times [2022-03-20 19:21:52,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:21:52,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1806014502] [2022-03-20 19:21:52,194 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:21:52,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1704751065, now seen corresponding path program 1 times [2022-03-20 19:21:52,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:21:52,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019227565] [2022-03-20 19:21:52,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:21:52,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:21:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:21:52,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:21:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:21:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:21:52,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:21:52,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019227565] [2022-03-20 19:21:52,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019227565] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:21:52,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:21:52,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:21:55,249 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:21:55,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1806014502] [2022-03-20 19:21:55,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1806014502] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:21:55,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:21:55,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-03-20 19:21:55,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335431505] [2022-03-20 19:21:55,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:21:55,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-03-20 19:21:55,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:21:55,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-03-20 19:21:55,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7029, Invalid=7977, Unknown=0, NotChecked=0, Total=15006 [2022-03-20 19:21:55,252 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand has 123 states, 123 states have (on average 1.016260162601626) internal successors, (125), 121 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:59,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:21:59,727 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2022-03-20 19:21:59,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-03-20 19:21:59,727 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.016260162601626) internal successors, (125), 121 states have internal predecessors, (125), 2 states have call successors, (3), 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 129 [2022-03-20 19:21:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:21:59,727 INFO L225 Difference]: With dead ends: 136 [2022-03-20 19:21:59,727 INFO L226 Difference]: Without dead ends: 131 [2022-03-20 19:21:59,729 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7371 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=21317, Invalid=37489, Unknown=0, NotChecked=0, Total=58806 [2022-03-20 19:21:59,729 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:21:59,730 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 67 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:21:59,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-20 19:21:59,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-03-20 19:21:59,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.007936507936508) internal successors, (127), 126 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:59,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2022-03-20 19:21:59,735 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 129 [2022-03-20 19:21:59,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:21:59,735 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2022-03-20 19:21:59,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.016260162601626) internal successors, (125), 121 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:21:59,735 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2022-03-20 19:21:59,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-03-20 19:21:59,735 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:21:59,735 INFO L499 BasicCegarLoop]: trace histogram [118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:21:59,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-03-20 19:21:59,735 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:21:59,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:21:59,736 INFO L85 PathProgramCache]: Analyzing trace with hash -106322984, now seen corresponding path program 118 times [2022-03-20 19:21:59,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:21:59,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1206732611] [2022-03-20 19:21:59,838 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:21:59,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1645645721, now seen corresponding path program 1 times [2022-03-20 19:21:59,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:21:59,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587870013] [2022-03-20 19:21:59,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:21:59,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:21:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:21:59,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:21:59,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:21:59,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:21:59,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:21:59,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587870013] [2022-03-20 19:21:59,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587870013] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:21:59,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:21:59,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:22:03,000 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:22:03,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1206732611] [2022-03-20 19:22:03,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1206732611] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:03,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:03,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-03-20 19:22:03,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474643648] [2022-03-20 19:22:03,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:22:03,001 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-03-20 19:22:03,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:03,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-03-20 19:22:03,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7148, Invalid=8104, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 19:22:03,008 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand has 124 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 122 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:22:07,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:22:07,032 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2022-03-20 19:22:07,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-03-20 19:22:07,033 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 122 states have internal predecessors, (126), 2 states have call successors, (3), 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 130 [2022-03-20 19:22:07,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:22:07,033 INFO L225 Difference]: With dead ends: 137 [2022-03-20 19:22:07,033 INFO L226 Difference]: Without dead ends: 132 [2022-03-20 19:22:07,036 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7493 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=21676, Invalid=38104, Unknown=0, NotChecked=0, Total=59780 [2022-03-20 19:22:07,036 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:22:07,036 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:22:07,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-20 19:22:07,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-03-20 19:22:07,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.0078740157480315) internal successors, (128), 127 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:22:07,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2022-03-20 19:22:07,041 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 130 [2022-03-20 19:22:07,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:22:07,041 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2022-03-20 19:22:07,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 122 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:22:07,041 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2022-03-20 19:22:07,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 19:22:07,041 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:22:07,041 INFO L499 BasicCegarLoop]: trace histogram [119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:22:07,041 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-03-20 19:22:07,041 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:22:07,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:22:07,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1034343622, now seen corresponding path program 119 times [2022-03-20 19:22:07,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:07,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1613749405] [2022-03-20 19:22:07,138 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:22:07,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1586540377, now seen corresponding path program 1 times [2022-03-20 19:22:07,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:22:07,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117552417] [2022-03-20 19:22:07,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:22:07,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:22:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:22:07,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:22:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:22:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:22:07,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:22:07,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117552417] [2022-03-20 19:22:07,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117552417] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:07,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:07,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:22:10,488 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:22:10,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1613749405] [2022-03-20 19:22:10,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1613749405] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:10,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:10,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-03-20 19:22:10,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829671434] [2022-03-20 19:22:10,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:22:10,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-03-20 19:22:10,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:10,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-03-20 19:22:10,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7268, Invalid=8232, Unknown=0, NotChecked=0, Total=15500 [2022-03-20 19:22:10,490 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand has 125 states, 125 states have (on average 1.016) internal successors, (127), 123 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:22:15,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:22:15,816 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2022-03-20 19:22:15,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-03-20 19:22:15,816 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.016) internal successors, (127), 123 states have internal predecessors, (127), 2 states have call successors, (3), 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 131 [2022-03-20 19:22:15,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:22:15,816 INFO L225 Difference]: With dead ends: 138 [2022-03-20 19:22:15,816 INFO L226 Difference]: Without dead ends: 133 [2022-03-20 19:22:15,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7616 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=22038, Invalid=38724, Unknown=0, NotChecked=0, Total=60762 [2022-03-20 19:22:15,819 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:22:15,819 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:22:15,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-20 19:22:15,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-03-20 19:22:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0078125) internal successors, (129), 128 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:22:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2022-03-20 19:22:15,824 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 131 [2022-03-20 19:22:15,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:22:15,824 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2022-03-20 19:22:15,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.016) internal successors, (127), 123 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:22:15,824 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2022-03-20 19:22:15,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-20 19:22:15,825 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:22:15,825 INFO L499 BasicCegarLoop]: trace histogram [120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:22:15,825 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-03-20 19:22:15,825 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:22:15,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:22:15,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2035270040, now seen corresponding path program 120 times [2022-03-20 19:22:15,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:15,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [293445781] [2022-03-20 19:22:16,026 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:22:16,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1527435033, now seen corresponding path program 1 times [2022-03-20 19:22:16,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:22:16,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479254645] [2022-03-20 19:22:16,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:22:16,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:22:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:22:16,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:22:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:22:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:22:16,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:22:16,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479254645] [2022-03-20 19:22:16,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479254645] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:16,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:16,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:22:19,991 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:22:19,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [293445781] [2022-03-20 19:22:19,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [293445781] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:19,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:19,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-03-20 19:22:19,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333053611] [2022-03-20 19:22:19,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:22:19,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-03-20 19:22:19,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:19,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-03-20 19:22:19,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7389, Invalid=8361, Unknown=0, NotChecked=0, Total=15750 [2022-03-20 19:22:19,993 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand has 126 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 124 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:22:24,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:22:24,968 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2022-03-20 19:22:24,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-03-20 19:22:24,968 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 124 states have internal predecessors, (128), 2 states have call successors, (3), 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 132 [2022-03-20 19:22:24,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:22:24,968 INFO L225 Difference]: With dead ends: 139 [2022-03-20 19:22:24,968 INFO L226 Difference]: Without dead ends: 134 [2022-03-20 19:22:24,971 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7740 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=22403, Invalid=39349, Unknown=0, NotChecked=0, Total=61752 [2022-03-20 19:22:24,971 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:22:24,971 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:22:24,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-20 19:22:24,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-03-20 19:22:24,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0077519379844961) internal successors, (130), 129 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:22:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2022-03-20 19:22:24,976 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 132 [2022-03-20 19:22:24,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:22:24,976 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2022-03-20 19:22:24,976 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 124 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:22:24,976 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2022-03-20 19:22:24,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 19:22:24,976 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:22:24,976 INFO L499 BasicCegarLoop]: trace histogram [121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:22:24,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-03-20 19:22:24,976 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:22:24,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:22:24,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1295749370, now seen corresponding path program 121 times [2022-03-20 19:22:24,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:24,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [353884749] [2022-03-20 19:22:25,049 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:22:25,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1468329689, now seen corresponding path program 1 times [2022-03-20 19:22:25,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:22:25,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131251492] [2022-03-20 19:22:25,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:22:25,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:22:25,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:22:25,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:22:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:22:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:22:25,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:22:25,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131251492] [2022-03-20 19:22:25,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131251492] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:25,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:25,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:22:29,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:22:29,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [353884749] [2022-03-20 19:22:29,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [353884749] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:29,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:29,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-03-20 19:22:29,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063452718] [2022-03-20 19:22:29,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:22:29,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-03-20 19:22:29,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:29,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-03-20 19:22:29,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7511, Invalid=8491, Unknown=0, NotChecked=0, Total=16002 [2022-03-20 19:22:29,177 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand has 127 states, 127 states have (on average 1.015748031496063) internal successors, (129), 125 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:22:34,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:22:34,423 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2022-03-20 19:22:34,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-03-20 19:22:34,423 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.015748031496063) internal successors, (129), 125 states have internal predecessors, (129), 2 states have call successors, (3), 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 133 [2022-03-20 19:22:34,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:22:34,423 INFO L225 Difference]: With dead ends: 140 [2022-03-20 19:22:34,423 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 19:22:34,426 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7865 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=22771, Invalid=39979, Unknown=0, NotChecked=0, Total=62750 [2022-03-20 19:22:34,426 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:22:34,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:22:34,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 19:22:34,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-03-20 19:22:34,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:22:34,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2022-03-20 19:22:34,431 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 133 [2022-03-20 19:22:34,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:22:34,431 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2022-03-20 19:22:34,431 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.015748031496063) internal successors, (129), 125 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:22:34,431 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2022-03-20 19:22:34,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-20 19:22:34,431 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:22:34,432 INFO L499 BasicCegarLoop]: trace histogram [122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:22:34,432 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-03-20 19:22:34,432 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:22:34,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:22:34,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1478135976, now seen corresponding path program 122 times [2022-03-20 19:22:34,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:34,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1842565462] [2022-03-20 19:22:34,581 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:22:34,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1409224345, now seen corresponding path program 1 times [2022-03-20 19:22:34,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:22:34,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654842514] [2022-03-20 19:22:34,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:22:34,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:22:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:22:34,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:22:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:22:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:22:34,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:22:34,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654842514] [2022-03-20 19:22:34,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654842514] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:34,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:34,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:22:38,582 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:22:38,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1842565462] [2022-03-20 19:22:38,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1842565462] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:38,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:38,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-03-20 19:22:38,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131933500] [2022-03-20 19:22:38,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:22:38,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-03-20 19:22:38,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:38,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-03-20 19:22:38,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7634, Invalid=8622, Unknown=0, NotChecked=0, Total=16256 [2022-03-20 19:22:38,586 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand has 128 states, 128 states have (on average 1.015625) internal successors, (130), 126 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:22:43,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:22:43,606 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2022-03-20 19:22:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-03-20 19:22:43,606 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.015625) internal successors, (130), 126 states have internal predecessors, (130), 2 states have call successors, (3), 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 134 [2022-03-20 19:22:43,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:22:43,606 INFO L225 Difference]: With dead ends: 141 [2022-03-20 19:22:43,606 INFO L226 Difference]: Without dead ends: 136 [2022-03-20 19:22:43,609 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7991 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=23142, Invalid=40614, Unknown=0, NotChecked=0, Total=63756 [2022-03-20 19:22:43,609 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:22:43,609 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:22:43,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-20 19:22:43,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-03-20 19:22:43,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0076335877862594) internal successors, (132), 131 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:22:43,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2022-03-20 19:22:43,614 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 134 [2022-03-20 19:22:43,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:22:43,614 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2022-03-20 19:22:43,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.015625) internal successors, (130), 126 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:22:43,614 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2022-03-20 19:22:43,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 19:22:43,615 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:22:43,615 INFO L499 BasicCegarLoop]: trace histogram [123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:22:43,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-03-20 19:22:43,615 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:22:43,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:22:43,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1457813830, now seen corresponding path program 123 times [2022-03-20 19:22:43,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:43,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1856728010] [2022-03-20 19:22:43,741 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:22:43,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1350119001, now seen corresponding path program 1 times [2022-03-20 19:22:43,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:22:43,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932766843] [2022-03-20 19:22:43,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:22:43,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:22:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:22:43,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:22:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:22:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:22:43,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:22:43,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932766843] [2022-03-20 19:22:43,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932766843] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:43,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:43,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:22:48,590 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:22:48,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1856728010] [2022-03-20 19:22:48,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1856728010] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:48,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:48,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-03-20 19:22:48,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72956387] [2022-03-20 19:22:48,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:22:48,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-03-20 19:22:48,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:48,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-03-20 19:22:48,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7758, Invalid=8754, Unknown=0, NotChecked=0, Total=16512 [2022-03-20 19:22:48,593 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand has 129 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 127 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:22:53,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:22:53,604 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2022-03-20 19:22:53,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-03-20 19:22:53,605 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 127 states have internal predecessors, (131), 2 states have call successors, (3), 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 135 [2022-03-20 19:22:53,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:22:53,605 INFO L225 Difference]: With dead ends: 142 [2022-03-20 19:22:53,605 INFO L226 Difference]: Without dead ends: 137 [2022-03-20 19:22:53,608 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8118 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=23516, Invalid=41254, Unknown=0, NotChecked=0, Total=64770 [2022-03-20 19:22:53,608 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:22:53,608 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:22:53,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-20 19:22:53,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-03-20 19:22:53,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0075757575757576) internal successors, (133), 132 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:22:53,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2022-03-20 19:22:53,614 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 135 [2022-03-20 19:22:53,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:22:53,614 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2022-03-20 19:22:53,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 127 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:22:53,614 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2022-03-20 19:22:53,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-03-20 19:22:53,614 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:22:53,615 INFO L499 BasicCegarLoop]: trace histogram [124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:22:53,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-03-20 19:22:53,615 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:22:53,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:22:53,615 INFO L85 PathProgramCache]: Analyzing trace with hash -2017022696, now seen corresponding path program 124 times [2022-03-20 19:22:53,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:53,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1836301842] [2022-03-20 19:22:53,720 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:22:53,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1291013657, now seen corresponding path program 1 times [2022-03-20 19:22:53,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:22:53,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120614620] [2022-03-20 19:22:53,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:22:53,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:22:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:22:53,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:22:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:22:53,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:22:53,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:22:53,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120614620] [2022-03-20 19:22:53,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120614620] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:53,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:53,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:22:57,546 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:22:57,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1836301842] [2022-03-20 19:22:57,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1836301842] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:57,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:57,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-03-20 19:22:57,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201360344] [2022-03-20 19:22:57,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:22:57,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-03-20 19:22:57,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:57,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-03-20 19:22:57,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7883, Invalid=8887, Unknown=0, NotChecked=0, Total=16770 [2022-03-20 19:22:57,548 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand has 130 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 128 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:23:02,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:23:02,156 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2022-03-20 19:23:02,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-03-20 19:23:02,156 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 128 states have internal predecessors, (132), 2 states have call successors, (3), 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 136 [2022-03-20 19:23:02,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:23:02,157 INFO L225 Difference]: With dead ends: 143 [2022-03-20 19:23:02,157 INFO L226 Difference]: Without dead ends: 138 [2022-03-20 19:23:02,159 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8246 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=23893, Invalid=41899, Unknown=0, NotChecked=0, Total=65792 [2022-03-20 19:23:02,159 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:23:02,159 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 77 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:23:02,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-20 19:23:02,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-03-20 19:23:02,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.0075187969924813) internal successors, (134), 133 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:23:02,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2022-03-20 19:23:02,164 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 136 [2022-03-20 19:23:02,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:23:02,164 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2022-03-20 19:23:02,164 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 128 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:23:02,164 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2022-03-20 19:23:02,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-20 19:23:02,164 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:23:02,164 INFO L499 BasicCegarLoop]: trace histogram [125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:23:02,165 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-03-20 19:23:02,165 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:23:02,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:23:02,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1932194694, now seen corresponding path program 125 times [2022-03-20 19:23:02,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:02,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [940780386] [2022-03-20 19:23:02,274 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:23:02,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1231908313, now seen corresponding path program 1 times [2022-03-20 19:23:02,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:23:02,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108165293] [2022-03-20 19:23:02,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:23:02,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:23:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:23:02,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:23:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:23:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:23:02,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:23:02,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108165293] [2022-03-20 19:23:02,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108165293] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:02,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:02,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:23:05,847 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:23:05,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [940780386] [2022-03-20 19:23:05,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [940780386] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:05,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:05,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-03-20 19:23:05,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681455642] [2022-03-20 19:23:05,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:23:05,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-03-20 19:23:05,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:05,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-03-20 19:23:05,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8009, Invalid=9021, Unknown=0, NotChecked=0, Total=17030 [2022-03-20 19:23:05,849 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand has 131 states, 131 states have (on average 1.015267175572519) internal successors, (133), 129 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:23:10,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:23:10,359 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2022-03-20 19:23:10,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-20 19:23:10,359 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.015267175572519) internal successors, (133), 129 states have internal predecessors, (133), 2 states have call successors, (3), 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 137 [2022-03-20 19:23:10,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:23:10,360 INFO L225 Difference]: With dead ends: 144 [2022-03-20 19:23:10,360 INFO L226 Difference]: Without dead ends: 139 [2022-03-20 19:23:10,363 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8375 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=24273, Invalid=42549, Unknown=0, NotChecked=0, Total=66822 [2022-03-20 19:23:10,363 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:23:10,363 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:23:10,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-20 19:23:10,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-03-20 19:23:10,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.007462686567164) internal successors, (135), 134 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:23:10,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2022-03-20 19:23:10,368 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 137 [2022-03-20 19:23:10,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:23:10,368 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2022-03-20 19:23:10,368 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.015267175572519) internal successors, (133), 129 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:23:10,368 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2022-03-20 19:23:10,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 19:23:10,368 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:23:10,368 INFO L499 BasicCegarLoop]: trace histogram [126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:23:10,368 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-03-20 19:23:10,368 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:23:10,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:23:10,369 INFO L85 PathProgramCache]: Analyzing trace with hash -196117800, now seen corresponding path program 126 times [2022-03-20 19:23:10,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:10,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [853862639] [2022-03-20 19:23:10,437 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:23:10,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1172802969, now seen corresponding path program 1 times [2022-03-20 19:23:10,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:23:10,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882826475] [2022-03-20 19:23:10,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:23:10,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:23:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:23:10,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:23:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:23:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:23:10,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:23:10,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882826475] [2022-03-20 19:23:10,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882826475] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:10,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:10,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:23:14,179 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:23:14,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [853862639] [2022-03-20 19:23:14,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [853862639] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:14,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:14,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-03-20 19:23:14,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419425715] [2022-03-20 19:23:14,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:23:14,179 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-03-20 19:23:14,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:14,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-03-20 19:23:14,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8136, Invalid=9156, Unknown=0, NotChecked=0, Total=17292 [2022-03-20 19:23:14,181 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand has 132 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 130 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:23:18,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:23:18,593 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2022-03-20 19:23:18,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-03-20 19:23:18,593 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 130 states have internal predecessors, (134), 2 states have call successors, (3), 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 138 [2022-03-20 19:23:18,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:23:18,594 INFO L225 Difference]: With dead ends: 145 [2022-03-20 19:23:18,594 INFO L226 Difference]: Without dead ends: 140 [2022-03-20 19:23:18,597 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8505 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=24656, Invalid=43204, Unknown=0, NotChecked=0, Total=67860 [2022-03-20 19:23:18,597 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:23:18,597 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:23:18,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-20 19:23:18,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-03-20 19:23:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0074074074074073) internal successors, (136), 135 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:23:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2022-03-20 19:23:18,616 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 138 [2022-03-20 19:23:18,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:23:18,619 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2022-03-20 19:23:18,619 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 130 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:23:18,619 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2022-03-20 19:23:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-20 19:23:18,619 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:23:18,620 INFO L499 BasicCegarLoop]: trace histogram [127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:23:18,620 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-03-20 19:23:18,620 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:23:18,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:23:18,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1749295674, now seen corresponding path program 127 times [2022-03-20 19:23:18,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:18,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1599465005] [2022-03-20 19:23:18,757 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:23:18,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1113697625, now seen corresponding path program 1 times [2022-03-20 19:23:18,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:23:18,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509382773] [2022-03-20 19:23:18,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:23:18,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:23:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:23:18,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:23:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:23:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:23:18,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:23:18,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509382773] [2022-03-20 19:23:18,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509382773] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:18,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:18,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:23:22,539 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:23:22,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1599465005] [2022-03-20 19:23:22,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1599465005] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:22,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:22,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-03-20 19:23:22,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510200311] [2022-03-20 19:23:22,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:23:22,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-03-20 19:23:22,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:22,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-03-20 19:23:22,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8264, Invalid=9292, Unknown=0, NotChecked=0, Total=17556 [2022-03-20 19:23:22,544 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand has 133 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 131 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:23:27,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:23:27,142 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2022-03-20 19:23:27,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-03-20 19:23:27,142 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 131 states have internal predecessors, (135), 2 states have call successors, (3), 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 139 [2022-03-20 19:23:27,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:23:27,143 INFO L225 Difference]: With dead ends: 146 [2022-03-20 19:23:27,143 INFO L226 Difference]: Without dead ends: 141 [2022-03-20 19:23:27,147 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8636 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=25042, Invalid=43864, Unknown=0, NotChecked=0, Total=68906 [2022-03-20 19:23:27,148 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:23:27,148 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 67 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:23:27,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-20 19:23:27,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-03-20 19:23:27,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0073529411764706) internal successors, (137), 136 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:23:27,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2022-03-20 19:23:27,160 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 139 [2022-03-20 19:23:27,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:23:27,161 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2022-03-20 19:23:27,161 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 131 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:23:27,161 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2022-03-20 19:23:27,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-20 19:23:27,179 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:23:27,179 INFO L499 BasicCegarLoop]: trace histogram [128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:23:27,180 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-03-20 19:23:27,180 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:23:27,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:23:27,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1641797784, now seen corresponding path program 128 times [2022-03-20 19:23:27,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:27,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1454554232] [2022-03-20 19:23:27,292 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:23:27,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1054592281, now seen corresponding path program 1 times [2022-03-20 19:23:27,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:23:27,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236709123] [2022-03-20 19:23:27,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:23:27,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:23:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:23:27,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:23:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:23:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:23:27,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:23:27,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236709123] [2022-03-20 19:23:27,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236709123] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:27,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:27,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:23:33,144 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:23:33,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1454554232] [2022-03-20 19:23:33,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1454554232] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:33,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:33,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-03-20 19:23:33,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104933065] [2022-03-20 19:23:33,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:23:33,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-03-20 19:23:33,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:33,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-03-20 19:23:33,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8393, Invalid=9429, Unknown=0, NotChecked=0, Total=17822 [2022-03-20 19:23:33,147 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand has 134 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 132 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:23:38,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:23:38,190 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2022-03-20 19:23:38,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-03-20 19:23:38,190 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 132 states have internal predecessors, (136), 2 states have call successors, (3), 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 140 [2022-03-20 19:23:38,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:23:38,192 INFO L225 Difference]: With dead ends: 147 [2022-03-20 19:23:38,192 INFO L226 Difference]: Without dead ends: 142 [2022-03-20 19:23:38,195 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8768 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=25431, Invalid=44529, Unknown=0, NotChecked=0, Total=69960 [2022-03-20 19:23:38,195 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:23:38,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:23:38,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-20 19:23:38,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-03-20 19:23:38,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0072992700729928) internal successors, (138), 137 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:23:38,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2022-03-20 19:23:38,201 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 140 [2022-03-20 19:23:38,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:23:38,201 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2022-03-20 19:23:38,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 132 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:23:38,201 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2022-03-20 19:23:38,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-20 19:23:38,201 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:23:38,201 INFO L499 BasicCegarLoop]: trace histogram [129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:23:38,201 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-03-20 19:23:38,202 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:23:38,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:23:38,202 INFO L85 PathProgramCache]: Analyzing trace with hash -608487418, now seen corresponding path program 129 times [2022-03-20 19:23:38,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:38,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1435410033] [2022-03-20 19:23:38,332 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:23:38,333 INFO L85 PathProgramCache]: Analyzing trace with hash -995486937, now seen corresponding path program 1 times [2022-03-20 19:23:38,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:23:38,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365455267] [2022-03-20 19:23:38,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:23:38,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:23:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:23:38,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:23:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:23:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:23:38,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:23:38,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365455267] [2022-03-20 19:23:38,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365455267] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:38,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:38,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:23:42,677 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:23:42,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1435410033] [2022-03-20 19:23:42,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1435410033] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:42,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:42,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-03-20 19:23:42,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020199941] [2022-03-20 19:23:42,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:23:42,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-03-20 19:23:42,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:42,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-03-20 19:23:42,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8523, Invalid=9567, Unknown=0, NotChecked=0, Total=18090 [2022-03-20 19:23:42,679 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand has 135 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 133 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:23:47,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:23:47,688 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2022-03-20 19:23:47,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-03-20 19:23:47,688 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 133 states have internal predecessors, (137), 2 states have call successors, (3), 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 141 [2022-03-20 19:23:47,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:23:47,689 INFO L225 Difference]: With dead ends: 148 [2022-03-20 19:23:47,689 INFO L226 Difference]: Without dead ends: 143 [2022-03-20 19:23:47,691 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8901 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=25823, Invalid=45199, Unknown=0, NotChecked=0, Total=71022 [2022-03-20 19:23:47,691 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:23:47,691 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:23:47,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-20 19:23:47,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-03-20 19:23:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 138 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:23:47,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2022-03-20 19:23:47,696 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 141 [2022-03-20 19:23:47,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:23:47,697 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2022-03-20 19:23:47,697 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 133 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:23:47,697 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2022-03-20 19:23:47,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-03-20 19:23:47,697 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:23:47,697 INFO L499 BasicCegarLoop]: trace histogram [130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:23:47,697 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-03-20 19:23:47,697 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:23:47,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:23:47,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1647851944, now seen corresponding path program 130 times [2022-03-20 19:23:47,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:47,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1010204669] [2022-03-20 19:23:47,802 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:23:47,802 INFO L85 PathProgramCache]: Analyzing trace with hash -936381593, now seen corresponding path program 1 times [2022-03-20 19:23:47,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:23:47,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666802835] [2022-03-20 19:23:47,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:23:47,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:23:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:23:47,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:23:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:23:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:23:47,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:23:47,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666802835] [2022-03-20 19:23:47,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666802835] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:47,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:47,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:23:52,441 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:23:52,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1010204669] [2022-03-20 19:23:52,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1010204669] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:52,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:52,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-03-20 19:23:52,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112084694] [2022-03-20 19:23:52,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:23:52,441 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-03-20 19:23:52,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:52,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-03-20 19:23:52,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8654, Invalid=9706, Unknown=0, NotChecked=0, Total=18360 [2022-03-20 19:23:52,443 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand has 136 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 134 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:23:57,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:23:57,072 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2022-03-20 19:23:57,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-03-20 19:23:57,073 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 134 states have internal predecessors, (138), 2 states have call successors, (3), 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 142 [2022-03-20 19:23:57,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:23:57,073 INFO L225 Difference]: With dead ends: 149 [2022-03-20 19:23:57,073 INFO L226 Difference]: Without dead ends: 144 [2022-03-20 19:23:57,076 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9035 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=26218, Invalid=45874, Unknown=0, NotChecked=0, Total=72092 [2022-03-20 19:23:57,076 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:23:57,076 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:23:57,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-20 19:23:57,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-03-20 19:23:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.0071942446043165) internal successors, (140), 139 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:23:57,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2022-03-20 19:23:57,081 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 142 [2022-03-20 19:23:57,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:23:57,081 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2022-03-20 19:23:57,081 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 134 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:23:57,081 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2022-03-20 19:23:57,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 19:23:57,081 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:23:57,081 INFO L499 BasicCegarLoop]: trace histogram [131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:23:57,081 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-03-20 19:23:57,081 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:23:57,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:23:57,082 INFO L85 PathProgramCache]: Analyzing trace with hash 491586118, now seen corresponding path program 131 times [2022-03-20 19:23:57,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:57,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1436593095] [2022-03-20 19:23:57,216 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:23:57,217 INFO L85 PathProgramCache]: Analyzing trace with hash -877276249, now seen corresponding path program 1 times [2022-03-20 19:23:57,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:23:57,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806011683] [2022-03-20 19:23:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:23:57,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:23:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:23:57,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:23:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:23:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:23:57,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:23:57,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806011683] [2022-03-20 19:23:57,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806011683] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:57,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:57,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:24:01,864 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:01,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1436593095] [2022-03-20 19:24:01,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1436593095] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:01,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:01,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-03-20 19:24:01,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099586995] [2022-03-20 19:24:01,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:01,865 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-03-20 19:24:01,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:01,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-03-20 19:24:01,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8786, Invalid=9846, Unknown=0, NotChecked=0, Total=18632 [2022-03-20 19:24:01,867 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand has 137 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 135 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:24:07,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:07,148 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2022-03-20 19:24:07,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-03-20 19:24:07,148 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 135 states have internal predecessors, (139), 2 states have call successors, (3), 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 143 [2022-03-20 19:24:07,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:07,148 INFO L225 Difference]: With dead ends: 150 [2022-03-20 19:24:07,148 INFO L226 Difference]: Without dead ends: 145 [2022-03-20 19:24:07,151 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9170 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=26616, Invalid=46554, Unknown=0, NotChecked=0, Total=73170 [2022-03-20 19:24:07,152 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:07,152 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 77 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:24:07,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-20 19:24:07,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-03-20 19:24:07,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0071428571428571) internal successors, (141), 140 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:24:07,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2022-03-20 19:24:07,157 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 143 [2022-03-20 19:24:07,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:07,157 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2022-03-20 19:24:07,157 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 135 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:24:07,157 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2022-03-20 19:24:07,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-20 19:24:07,157 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:07,157 INFO L499 BasicCegarLoop]: trace histogram [132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:24:07,157 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-03-20 19:24:07,157 INFO L403 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:07,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:07,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1905310696, now seen corresponding path program 132 times [2022-03-20 19:24:07,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:07,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [805576435] [2022-03-20 19:24:07,257 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:24:07,258 INFO L85 PathProgramCache]: Analyzing trace with hash -818170905, now seen corresponding path program 1 times [2022-03-20 19:24:07,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:07,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561969686] [2022-03-20 19:24:07,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:07,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:24:07,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:24:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:24:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:24:07,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:07,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561969686] [2022-03-20 19:24:07,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561969686] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:07,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:07,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:24:12,903 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:12,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [805576435] [2022-03-20 19:24:12,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [805576435] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:12,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:12,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-03-20 19:24:12,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107133024] [2022-03-20 19:24:12,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:12,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-03-20 19:24:12,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:12,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-03-20 19:24:12,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8919, Invalid=9987, Unknown=0, NotChecked=0, Total=18906 [2022-03-20 19:24:12,907 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand has 138 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 136 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:24:17,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:17,646 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2022-03-20 19:24:17,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-03-20 19:24:17,646 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 136 states have internal predecessors, (140), 2 states have call successors, (3), 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 144 [2022-03-20 19:24:17,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:17,647 INFO L225 Difference]: With dead ends: 151 [2022-03-20 19:24:17,647 INFO L226 Difference]: Without dead ends: 146 [2022-03-20 19:24:17,649 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9306 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=27017, Invalid=47239, Unknown=0, NotChecked=0, Total=74256 [2022-03-20 19:24:17,649 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:17,649 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 67 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:24:17,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-20 19:24:17,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-03-20 19:24:17,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.0070921985815602) internal successors, (142), 141 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:24:17,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2022-03-20 19:24:17,654 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 144 [2022-03-20 19:24:17,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:17,654 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2022-03-20 19:24:17,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 136 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:24:17,654 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2022-03-20 19:24:17,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-20 19:24:17,654 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:17,654 INFO L499 BasicCegarLoop]: trace histogram [133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:24:17,654 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-03-20 19:24:17,655 INFO L403 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:17,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:17,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1100299398, now seen corresponding path program 133 times [2022-03-20 19:24:17,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:17,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [704750313] [2022-03-20 19:24:17,769 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:24:17,769 INFO L85 PathProgramCache]: Analyzing trace with hash -759065561, now seen corresponding path program 1 times [2022-03-20 19:24:17,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:17,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887217292] [2022-03-20 19:24:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:17,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:24:17,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:24:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:24:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:24:17,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:17,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887217292] [2022-03-20 19:24:17,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887217292] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:17,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:17,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:24:21,652 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:21,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [704750313] [2022-03-20 19:24:21,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [704750313] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:21,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:21,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-03-20 19:24:21,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526997368] [2022-03-20 19:24:21,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:21,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-03-20 19:24:21,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:21,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-03-20 19:24:21,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9053, Invalid=10129, Unknown=0, NotChecked=0, Total=19182 [2022-03-20 19:24:21,654 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand has 139 states, 139 states have (on average 1.014388489208633) internal successors, (141), 137 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:24:26,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:26,446 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2022-03-20 19:24:26,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-20 19:24:26,446 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 1.014388489208633) internal successors, (141), 137 states have internal predecessors, (141), 2 states have call successors, (3), 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 145 [2022-03-20 19:24:26,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:26,446 INFO L225 Difference]: With dead ends: 152 [2022-03-20 19:24:26,446 INFO L226 Difference]: Without dead ends: 147 [2022-03-20 19:24:26,449 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9443 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=27421, Invalid=47929, Unknown=0, NotChecked=0, Total=75350 [2022-03-20 19:24:26,449 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:26,449 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:24:26,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-20 19:24:26,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-03-20 19:24:26,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0070422535211268) internal successors, (143), 142 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:24:26,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2022-03-20 19:24:26,455 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 145 [2022-03-20 19:24:26,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:26,455 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2022-03-20 19:24:26,455 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 1.014388489208633) internal successors, (141), 137 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:24:26,455 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2022-03-20 19:24:26,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-20 19:24:26,465 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:26,465 INFO L499 BasicCegarLoop]: trace histogram [134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:24:26,465 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-03-20 19:24:26,465 INFO L403 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:26,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:26,466 INFO L85 PathProgramCache]: Analyzing trace with hash -215068200, now seen corresponding path program 134 times [2022-03-20 19:24:26,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:26,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1617457026] [2022-03-20 19:24:26,568 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:24:26,568 INFO L85 PathProgramCache]: Analyzing trace with hash -699960217, now seen corresponding path program 1 times [2022-03-20 19:24:26,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:26,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722903925] [2022-03-20 19:24:26,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:26,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:24:26,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:24:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:24:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:24:26,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:26,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722903925] [2022-03-20 19:24:26,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722903925] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:26,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:26,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:24:30,740 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:30,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1617457026] [2022-03-20 19:24:30,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1617457026] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:30,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:30,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-03-20 19:24:30,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5578286] [2022-03-20 19:24:30,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:30,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-20 19:24:30,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:30,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-20 19:24:30,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9188, Invalid=10272, Unknown=0, NotChecked=0, Total=19460 [2022-03-20 19:24:30,743 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand has 140 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 138 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:24:35,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:35,628 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2022-03-20 19:24:35,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-03-20 19:24:35,628 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 138 states have internal predecessors, (142), 2 states have call successors, (3), 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 146 [2022-03-20 19:24:35,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:35,629 INFO L225 Difference]: With dead ends: 153 [2022-03-20 19:24:35,629 INFO L226 Difference]: Without dead ends: 148 [2022-03-20 19:24:35,631 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9581 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=27828, Invalid=48624, Unknown=0, NotChecked=0, Total=76452 [2022-03-20 19:24:35,631 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:35,631 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:24:35,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-03-20 19:24:35,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-03-20 19:24:35,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.006993006993007) internal successors, (144), 143 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:24:35,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2022-03-20 19:24:35,636 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 146 [2022-03-20 19:24:35,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:35,636 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2022-03-20 19:24:35,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 138 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:24:35,637 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2022-03-20 19:24:35,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-20 19:24:35,637 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:35,637 INFO L499 BasicCegarLoop]: trace histogram [135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:24:35,637 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-03-20 19:24:35,637 INFO L403 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:35,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:35,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1958209222, now seen corresponding path program 135 times [2022-03-20 19:24:35,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:35,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [756352854] [2022-03-20 19:24:35,704 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:24:35,705 INFO L85 PathProgramCache]: Analyzing trace with hash -640854873, now seen corresponding path program 1 times [2022-03-20 19:24:35,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:35,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299132640] [2022-03-20 19:24:35,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:35,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:24:35,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:24:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:24:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:24:35,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:35,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299132640] [2022-03-20 19:24:35,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299132640] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:35,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:35,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:24:41,299 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:41,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [756352854] [2022-03-20 19:24:41,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [756352854] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:41,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:41,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-03-20 19:24:41,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067225023] [2022-03-20 19:24:41,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:41,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-03-20 19:24:41,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:41,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-03-20 19:24:41,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9324, Invalid=10416, Unknown=0, NotChecked=0, Total=19740 [2022-03-20 19:24:41,302 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand has 141 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 139 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:24:46,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:46,361 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2022-03-20 19:24:46,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-03-20 19:24:46,361 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 139 states have internal predecessors, (143), 2 states have call successors, (3), 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 147 [2022-03-20 19:24:46,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:46,361 INFO L225 Difference]: With dead ends: 154 [2022-03-20 19:24:46,361 INFO L226 Difference]: Without dead ends: 149 [2022-03-20 19:24:46,364 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9720 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=28238, Invalid=49324, Unknown=0, NotChecked=0, Total=77562 [2022-03-20 19:24:46,364 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:46,364 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:24:46,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-20 19:24:46,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-03-20 19:24:46,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0069444444444444) internal successors, (145), 144 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:24:46,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2022-03-20 19:24:46,369 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 147 [2022-03-20 19:24:46,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:46,369 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2022-03-20 19:24:46,370 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 139 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:24:46,370 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2022-03-20 19:24:46,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-03-20 19:24:46,370 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:46,370 INFO L499 BasicCegarLoop]: trace histogram [136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:24:46,370 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-03-20 19:24:46,370 INFO L403 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:46,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:46,370 INFO L85 PathProgramCache]: Analyzing trace with hash 610332568, now seen corresponding path program 136 times [2022-03-20 19:24:46,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:46,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [402012523] [2022-03-20 19:24:46,489 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:24:46,489 INFO L85 PathProgramCache]: Analyzing trace with hash -581749529, now seen corresponding path program 1 times [2022-03-20 19:24:46,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:46,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821628664] [2022-03-20 19:24:46,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:46,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:24:46,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:24:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:24:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:24:46,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:46,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821628664] [2022-03-20 19:24:46,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821628664] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:46,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:46,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:24:50,686 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:50,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [402012523] [2022-03-20 19:24:50,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [402012523] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:50,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:50,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-03-20 19:24:50,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732948815] [2022-03-20 19:24:50,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:50,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-03-20 19:24:50,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:50,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-03-20 19:24:50,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9461, Invalid=10561, Unknown=0, NotChecked=0, Total=20022 [2022-03-20 19:24:50,689 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand has 142 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 140 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:24:56,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:56,432 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2022-03-20 19:24:56,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-03-20 19:24:56,433 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 140 states have internal predecessors, (144), 2 states have call successors, (3), 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 148 [2022-03-20 19:24:56,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:56,433 INFO L225 Difference]: With dead ends: 155 [2022-03-20 19:24:56,433 INFO L226 Difference]: Without dead ends: 150 [2022-03-20 19:24:56,436 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9860 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=28651, Invalid=50029, Unknown=0, NotChecked=0, Total=78680 [2022-03-20 19:24:56,436 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:56,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:24:56,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-03-20 19:24:56,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-03-20 19:24:56,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.006896551724138) internal successors, (146), 145 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:24:56,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2022-03-20 19:24:56,441 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 148 [2022-03-20 19:24:56,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:56,441 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2022-03-20 19:24:56,441 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 140 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:24:56,441 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2022-03-20 19:24:56,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 19:24:56,442 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:56,442 INFO L499 BasicCegarLoop]: trace histogram [137, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:24:56,442 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-03-20 19:24:56,442 INFO L403 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:56,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:56,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1775829254, now seen corresponding path program 137 times [2022-03-20 19:24:56,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:56,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1209457052] [2022-03-20 19:24:56,531 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:24:56,531 INFO L85 PathProgramCache]: Analyzing trace with hash -522644185, now seen corresponding path program 1 times [2022-03-20 19:24:56,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:56,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119542539] [2022-03-20 19:24:56,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:56,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:24:56,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:24:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:24:56,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:24:56,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:56,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119542539] [2022-03-20 19:24:56,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119542539] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:56,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:56,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:25:01,008 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:25:01,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1209457052] [2022-03-20 19:25:01,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1209457052] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:25:01,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:25:01,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-03-20 19:25:01,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089397701] [2022-03-20 19:25:01,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:25:01,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-03-20 19:25:01,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:25:01,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-03-20 19:25:01,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9599, Invalid=10707, Unknown=0, NotChecked=0, Total=20306 [2022-03-20 19:25:01,010 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand has 143 states, 143 states have (on average 1.013986013986014) internal successors, (145), 141 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:25:06,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:25:06,350 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2022-03-20 19:25:06,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-03-20 19:25:06,350 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 1.013986013986014) internal successors, (145), 141 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-03-20 19:25:06,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:25:06,351 INFO L225 Difference]: With dead ends: 156 [2022-03-20 19:25:06,351 INFO L226 Difference]: Without dead ends: 151 [2022-03-20 19:25:06,354 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10001 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=29067, Invalid=50739, Unknown=0, NotChecked=0, Total=79806 [2022-03-20 19:25:06,354 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:25:06,354 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:25:06,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-20 19:25:06,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-03-20 19:25:06,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0068493150684932) internal successors, (147), 146 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:25:06,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2022-03-20 19:25:06,359 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 149 [2022-03-20 19:25:06,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:25:06,359 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2022-03-20 19:25:06,359 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 1.013986013986014) internal successors, (145), 141 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:25:06,359 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2022-03-20 19:25:06,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-03-20 19:25:06,360 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:25:06,360 INFO L499 BasicCegarLoop]: trace histogram [138, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:25:06,360 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-03-20 19:25:06,360 INFO L403 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:25:06,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:25:06,360 INFO L85 PathProgramCache]: Analyzing trace with hash -748479144, now seen corresponding path program 138 times [2022-03-20 19:25:06,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:25:06,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [7888623] [2022-03-20 19:25:06,430 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:25:06,430 INFO L85 PathProgramCache]: Analyzing trace with hash -463538841, now seen corresponding path program 1 times [2022-03-20 19:25:06,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:25:06,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117883201] [2022-03-20 19:25:06,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:25:06,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:25:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:25:06,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:25:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:25:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:25:06,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:25:06,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117883201] [2022-03-20 19:25:06,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117883201] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:25:06,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:25:06,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:25:11,684 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:25:11,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [7888623] [2022-03-20 19:25:11,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [7888623] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:25:11,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:25:11,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-03-20 19:25:11,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271751024] [2022-03-20 19:25:11,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:25:11,685 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-03-20 19:25:11,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:25:11,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-03-20 19:25:11,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9738, Invalid=10854, Unknown=0, NotChecked=0, Total=20592 [2022-03-20 19:25:11,688 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand has 144 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 142 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:25:17,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:25:17,217 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2022-03-20 19:25:17,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-03-20 19:25:17,217 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 142 states have internal predecessors, (146), 2 states have call successors, (3), 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 150 [2022-03-20 19:25:17,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:25:17,217 INFO L225 Difference]: With dead ends: 157 [2022-03-20 19:25:17,217 INFO L226 Difference]: Without dead ends: 152 [2022-03-20 19:25:17,220 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10143 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=29486, Invalid=51454, Unknown=0, NotChecked=0, Total=80940 [2022-03-20 19:25:17,220 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:25:17,220 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 19:25:17,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-20 19:25:17,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-03-20 19:25:17,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0068027210884354) internal successors, (148), 147 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:25:17,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2022-03-20 19:25:17,226 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 150 [2022-03-20 19:25:17,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:25:17,226 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2022-03-20 19:25:17,226 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 142 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:25:17,226 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2022-03-20 19:25:17,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-20 19:25:17,226 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:25:17,226 INFO L499 BasicCegarLoop]: trace histogram [139, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:25:17,226 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-03-20 19:25:17,226 INFO L403 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:25:17,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:25:17,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1692628154, now seen corresponding path program 139 times [2022-03-20 19:25:17,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:25:17,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1259116177] [2022-03-20 19:25:17,324 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:25:17,324 INFO L85 PathProgramCache]: Analyzing trace with hash -404433497, now seen corresponding path program 1 times [2022-03-20 19:25:17,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:25:17,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145198275] [2022-03-20 19:25:17,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:25:17,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:25:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:25:17,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:25:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:25:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:25:17,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:25:17,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145198275] [2022-03-20 19:25:17,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145198275] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:25:17,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:25:17,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:25:22,610 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:25:22,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1259116177] [2022-03-20 19:25:22,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1259116177] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:25:22,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:25:22,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2022-03-20 19:25:22,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632672029] [2022-03-20 19:25:22,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:25:22,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-03-20 19:25:22,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:25:22,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-03-20 19:25:22,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9878, Invalid=11002, Unknown=0, NotChecked=0, Total=20880 [2022-03-20 19:25:22,614 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand has 145 states, 145 states have (on average 1.013793103448276) internal successors, (147), 143 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:25:28,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:25:28,188 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2022-03-20 19:25:28,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-03-20 19:25:28,188 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.013793103448276) internal successors, (147), 143 states have internal predecessors, (147), 2 states have call successors, (3), 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 151 [2022-03-20 19:25:28,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:25:28,188 INFO L225 Difference]: With dead ends: 158 [2022-03-20 19:25:28,188 INFO L226 Difference]: Without dead ends: 153 [2022-03-20 19:25:28,191 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10286 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=29908, Invalid=52174, Unknown=0, NotChecked=0, Total=82082 [2022-03-20 19:25:28,191 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:25:28,191 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:25:28,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-20 19:25:28,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-03-20 19:25:28,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0067567567567568) internal successors, (149), 148 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:25:28,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2022-03-20 19:25:28,196 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 151 [2022-03-20 19:25:28,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:25:28,196 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2022-03-20 19:25:28,196 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.013793103448276) internal successors, (147), 143 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:25:28,196 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2022-03-20 19:25:28,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-03-20 19:25:28,196 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:25:28,197 INFO L499 BasicCegarLoop]: trace histogram [140, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:25:28,197 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-03-20 19:25:28,197 INFO L403 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:25:28,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:25:28,197 INFO L85 PathProgramCache]: Analyzing trace with hash -896476392, now seen corresponding path program 140 times [2022-03-20 19:25:28,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:25:28,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1531925555] [2022-03-20 19:25:28,269 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:25:28,269 INFO L85 PathProgramCache]: Analyzing trace with hash -345328153, now seen corresponding path program 1 times [2022-03-20 19:25:28,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:25:28,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960906358] [2022-03-20 19:25:28,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:25:28,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:25:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:25:28,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:25:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:25:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:25:28,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:25:28,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960906358] [2022-03-20 19:25:28,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960906358] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:25:28,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:25:28,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:25:35,245 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:25:35,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1531925555] [2022-03-20 19:25:35,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1531925555] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:25:35,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:25:35,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-03-20 19:25:35,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935313728] [2022-03-20 19:25:35,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:25:35,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-03-20 19:25:35,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:25:35,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-03-20 19:25:35,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10019, Invalid=11151, Unknown=0, NotChecked=0, Total=21170 [2022-03-20 19:25:35,249 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand has 146 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 144 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:25:41,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:25:41,694 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2022-03-20 19:25:41,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-03-20 19:25:41,694 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 144 states have internal predecessors, (148), 2 states have call successors, (3), 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 152 [2022-03-20 19:25:41,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:25:41,695 INFO L225 Difference]: With dead ends: 159 [2022-03-20 19:25:41,695 INFO L226 Difference]: Without dead ends: 154 [2022-03-20 19:25:41,697 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10430 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=30333, Invalid=52899, Unknown=0, NotChecked=0, Total=83232 [2022-03-20 19:25:41,697 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:25:41,697 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:25:41,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-20 19:25:41,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-03-20 19:25:41,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0067114093959733) internal successors, (150), 149 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:25:41,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2022-03-20 19:25:41,702 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 152 [2022-03-20 19:25:41,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:25:41,703 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2022-03-20 19:25:41,703 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 144 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:25:41,703 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2022-03-20 19:25:41,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-20 19:25:41,703 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:25:41,703 INFO L499 BasicCegarLoop]: trace histogram [141, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:25:41,703 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-03-20 19:25:41,703 INFO L403 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:25:41,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:25:41,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1985575546, now seen corresponding path program 141 times [2022-03-20 19:25:41,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:25:41,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [617356030] [2022-03-20 19:25:41,820 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:25:41,820 INFO L85 PathProgramCache]: Analyzing trace with hash -286222809, now seen corresponding path program 1 times [2022-03-20 19:25:41,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:25:41,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969108700] [2022-03-20 19:25:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:25:41,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:25:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:25:41,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:25:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:25:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:25:41,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:25:41,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969108700] [2022-03-20 19:25:41,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969108700] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:25:41,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:25:41,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:25:46,160 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:25:46,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [617356030] [2022-03-20 19:25:46,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [617356030] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:25:46,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:25:46,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2022-03-20 19:25:46,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900177793] [2022-03-20 19:25:46,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:25:46,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-03-20 19:25:46,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:25:46,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-03-20 19:25:46,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10161, Invalid=11301, Unknown=0, NotChecked=0, Total=21462 [2022-03-20 19:25:46,163 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand has 147 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 145 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:25:51,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:25:51,744 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2022-03-20 19:25:51,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-03-20 19:25:51,744 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 145 states have internal predecessors, (149), 2 states have call successors, (3), 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 153 [2022-03-20 19:25:51,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:25:51,745 INFO L225 Difference]: With dead ends: 160 [2022-03-20 19:25:51,745 INFO L226 Difference]: Without dead ends: 155 [2022-03-20 19:25:51,747 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10575 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=30761, Invalid=53629, Unknown=0, NotChecked=0, Total=84390 [2022-03-20 19:25:51,748 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:25:51,748 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:25:51,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-20 19:25:51,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-03-20 19:25:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0066666666666666) internal successors, (151), 150 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:25:51,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2022-03-20 19:25:51,753 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 153 [2022-03-20 19:25:51,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:25:51,753 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2022-03-20 19:25:51,753 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 145 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:25:51,753 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2022-03-20 19:25:51,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-20 19:25:51,754 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:25:51,754 INFO L499 BasicCegarLoop]: trace histogram [142, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:25:51,754 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-03-20 19:25:51,754 INFO L403 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:25:51,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:25:51,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1387910952, now seen corresponding path program 142 times [2022-03-20 19:25:51,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:25:51,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2124045999] [2022-03-20 19:25:51,901 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:25:51,901 INFO L85 PathProgramCache]: Analyzing trace with hash -227117465, now seen corresponding path program 1 times [2022-03-20 19:25:51,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:25:51,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457163189] [2022-03-20 19:25:51,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:25:51,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:25:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:25:51,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:25:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:25:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:25:51,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:25:51,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457163189] [2022-03-20 19:25:51,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457163189] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:25:51,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:25:51,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:25:57,646 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:25:57,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2124045999] [2022-03-20 19:25:57,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2124045999] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:25:57,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:25:57,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [148] imperfect sequences [] total 148 [2022-03-20 19:25:57,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001177601] [2022-03-20 19:25:57,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:25:57,646 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-03-20 19:25:57,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:25:57,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-03-20 19:25:57,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10304, Invalid=11452, Unknown=0, NotChecked=0, Total=21756 [2022-03-20 19:25:57,648 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand has 148 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 146 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:26:03,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:03,993 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2022-03-20 19:26:03,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-03-20 19:26:03,993 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 146 states have internal predecessors, (150), 2 states have call successors, (3), 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 154 [2022-03-20 19:26:03,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:03,994 INFO L225 Difference]: With dead ends: 161 [2022-03-20 19:26:03,994 INFO L226 Difference]: Without dead ends: 156 [2022-03-20 19:26:03,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10721 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=31192, Invalid=54364, Unknown=0, NotChecked=0, Total=85556 [2022-03-20 19:26:03,997 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:03,997 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 19:26:03,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-20 19:26:04,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-03-20 19:26:04,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0066225165562914) internal successors, (152), 151 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:26:04,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2022-03-20 19:26:04,003 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 154 [2022-03-20 19:26:04,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:04,003 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2022-03-20 19:26:04,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 146 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:26:04,003 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2022-03-20 19:26:04,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 19:26:04,003 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:04,004 INFO L499 BasicCegarLoop]: trace histogram [143, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:26:04,004 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-03-20 19:26:04,004 INFO L403 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:04,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:04,004 INFO L85 PathProgramCache]: Analyzing trace with hash -40177722, now seen corresponding path program 143 times [2022-03-20 19:26:04,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:04,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1299279025] [2022-03-20 19:26:04,073 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:26:04,073 INFO L85 PathProgramCache]: Analyzing trace with hash -168012121, now seen corresponding path program 1 times [2022-03-20 19:26:04,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:04,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710040014] [2022-03-20 19:26:04,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:04,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:26:04,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:26:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:26:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:26:04,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:04,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710040014] [2022-03-20 19:26:04,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710040014] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:04,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:04,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:26:08,715 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:26:08,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1299279025] [2022-03-20 19:26:08,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1299279025] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:08,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:08,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2022-03-20 19:26:08,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967640780] [2022-03-20 19:26:08,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:26:08,716 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-03-20 19:26:08,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:08,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-03-20 19:26:08,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10448, Invalid=11604, Unknown=0, NotChecked=0, Total=22052 [2022-03-20 19:26:08,718 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand has 149 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 147 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:26:16,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:16,597 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2022-03-20 19:26:16,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-03-20 19:26:16,598 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 147 states have internal predecessors, (151), 2 states have call successors, (3), 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 155 [2022-03-20 19:26:16,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:16,598 INFO L225 Difference]: With dead ends: 162 [2022-03-20 19:26:16,598 INFO L226 Difference]: Without dead ends: 157 [2022-03-20 19:26:16,602 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10868 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=31626, Invalid=55104, Unknown=0, NotChecked=0, Total=86730 [2022-03-20 19:26:16,602 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:16,602 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 19:26:16,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-20 19:26:16,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-03-20 19:26:16,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.006578947368421) internal successors, (153), 152 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:26:16,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2022-03-20 19:26:16,607 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 155 [2022-03-20 19:26:16,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:16,608 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2022-03-20 19:26:16,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 147 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:26:16,608 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2022-03-20 19:26:16,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-03-20 19:26:16,608 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:16,608 INFO L499 BasicCegarLoop]: trace histogram [144, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:26:16,608 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-03-20 19:26:16,608 INFO L403 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:16,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:16,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1210120552, now seen corresponding path program 144 times [2022-03-20 19:26:16,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:16,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2081395234] [2022-03-20 19:26:16,718 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:26:16,718 INFO L85 PathProgramCache]: Analyzing trace with hash -108906777, now seen corresponding path program 1 times [2022-03-20 19:26:16,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:16,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904905717] [2022-03-20 19:26:16,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:16,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:26:16,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:26:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:26:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:26:16,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:16,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904905717] [2022-03-20 19:26:16,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904905717] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:16,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:16,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:26:22,357 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:26:22,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2081395234] [2022-03-20 19:26:22,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2081395234] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:22,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:22,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2022-03-20 19:26:22,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507112040] [2022-03-20 19:26:22,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:26:22,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-03-20 19:26:22,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:22,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-03-20 19:26:22,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10593, Invalid=11757, Unknown=0, NotChecked=0, Total=22350 [2022-03-20 19:26:22,360 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand has 150 states, 150 states have (on average 1.0133333333333334) internal successors, (152), 148 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:26:28,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:28,342 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2022-03-20 19:26:28,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-03-20 19:26:28,342 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 1.0133333333333334) internal successors, (152), 148 states have internal predecessors, (152), 2 states have call successors, (3), 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 156 [2022-03-20 19:26:28,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:28,343 INFO L225 Difference]: With dead ends: 163 [2022-03-20 19:26:28,343 INFO L226 Difference]: Without dead ends: 158 [2022-03-20 19:26:28,345 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11016 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=32063, Invalid=55849, Unknown=0, NotChecked=0, Total=87912 [2022-03-20 19:26:28,345 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:28,346 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 19:26:28,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-20 19:26:28,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-03-20 19:26:28,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0065359477124183) internal successors, (154), 153 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:26:28,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2022-03-20 19:26:28,351 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 156 [2022-03-20 19:26:28,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:28,351 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2022-03-20 19:26:28,351 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 1.0133333333333334) internal successors, (152), 148 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:26:28,351 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2022-03-20 19:26:28,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 19:26:28,351 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:28,351 INFO L499 BasicCegarLoop]: trace histogram [145, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:26:28,351 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-03-20 19:26:28,351 INFO L403 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:28,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:28,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1176357382, now seen corresponding path program 145 times [2022-03-20 19:26:28,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:28,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [804674534] [2022-03-20 19:26:28,425 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:26:28,425 INFO L85 PathProgramCache]: Analyzing trace with hash -49801433, now seen corresponding path program 1 times [2022-03-20 19:26:28,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:28,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174599309] [2022-03-20 19:26:28,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:28,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:26:28,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:26:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:26:28,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:26:28,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:28,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174599309] [2022-03-20 19:26:28,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174599309] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:28,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:28,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:26:34,459 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:26:34,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [804674534] [2022-03-20 19:26:34,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [804674534] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:34,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:34,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [151] imperfect sequences [] total 151 [2022-03-20 19:26:34,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876289338] [2022-03-20 19:26:34,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:26:34,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-03-20 19:26:34,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:34,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-03-20 19:26:34,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10739, Invalid=11911, Unknown=0, NotChecked=0, Total=22650 [2022-03-20 19:26:34,461 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand has 151 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 149 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:26:42,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:42,019 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2022-03-20 19:26:42,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-03-20 19:26:42,020 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 149 states have internal predecessors, (153), 2 states have call successors, (3), 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 157 [2022-03-20 19:26:42,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:42,020 INFO L225 Difference]: With dead ends: 164 [2022-03-20 19:26:42,020 INFO L226 Difference]: Without dead ends: 159 [2022-03-20 19:26:42,023 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11165 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=32503, Invalid=56599, Unknown=0, NotChecked=0, Total=89102 [2022-03-20 19:26:42,023 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:42,024 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 19:26:42,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-20 19:26:42,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-03-20 19:26:42,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0064935064935066) internal successors, (155), 154 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:26:42,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2022-03-20 19:26:42,029 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 157 [2022-03-20 19:26:42,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:42,029 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2022-03-20 19:26:42,029 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 149 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:26:42,029 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2022-03-20 19:26:42,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-20 19:26:42,030 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:42,030 INFO L499 BasicCegarLoop]: trace histogram [146, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:26:42,030 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-03-20 19:26:42,030 INFO L403 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:42,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:42,030 INFO L85 PathProgramCache]: Analyzing trace with hash 2142729304, now seen corresponding path program 146 times [2022-03-20 19:26:42,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:42,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1022941119] [2022-03-20 19:26:42,130 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:26:42,130 INFO L85 PathProgramCache]: Analyzing trace with hash 9303911, now seen corresponding path program 1 times [2022-03-20 19:26:42,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:42,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616288054] [2022-03-20 19:26:42,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:42,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:42,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:26:42,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:26:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:26:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:26:42,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:42,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616288054] [2022-03-20 19:26:42,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616288054] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:42,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:42,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:26:48,218 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:26:48,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1022941119] [2022-03-20 19:26:48,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1022941119] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:48,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:48,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [152] imperfect sequences [] total 152 [2022-03-20 19:26:48,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82653968] [2022-03-20 19:26:48,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:26:48,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-03-20 19:26:48,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:48,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-03-20 19:26:48,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10886, Invalid=12066, Unknown=0, NotChecked=0, Total=22952 [2022-03-20 19:26:48,221 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand has 152 states, 152 states have (on average 1.013157894736842) internal successors, (154), 150 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:26:55,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:55,414 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2022-03-20 19:26:55,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-03-20 19:26:55,414 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 1.013157894736842) internal successors, (154), 150 states have internal predecessors, (154), 2 states have call successors, (3), 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 158 [2022-03-20 19:26:55,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:55,414 INFO L225 Difference]: With dead ends: 165 [2022-03-20 19:26:55,415 INFO L226 Difference]: Without dead ends: 160 [2022-03-20 19:26:55,417 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11315 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=32946, Invalid=57354, Unknown=0, NotChecked=0, Total=90300 [2022-03-20 19:26:55,418 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:55,418 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 19:26:55,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-20 19:26:55,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-03-20 19:26:55,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0064516129032257) internal successors, (156), 155 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:26:55,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2022-03-20 19:26:55,423 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 158 [2022-03-20 19:26:55,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:55,423 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2022-03-20 19:26:55,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 1.013157894736842) internal successors, (154), 150 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:26:55,423 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2022-03-20 19:26:55,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-20 19:26:55,424 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:55,424 INFO L499 BasicCegarLoop]: trace histogram [147, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:26:55,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-03-20 19:26:55,424 INFO L403 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:55,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:55,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2035487814, now seen corresponding path program 147 times [2022-03-20 19:26:55,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:55,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [376413374] [2022-03-20 19:26:55,552 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:26:55,552 INFO L85 PathProgramCache]: Analyzing trace with hash 68409255, now seen corresponding path program 1 times [2022-03-20 19:26:55,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:55,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13085674] [2022-03-20 19:26:55,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:55,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:26:55,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:26:55,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:26:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:26:55,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:55,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13085674] [2022-03-20 19:26:55,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13085674] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:55,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:55,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:27:00,400 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:27:00,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [376413374] [2022-03-20 19:27:00,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [376413374] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:27:00,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:27:00,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [153] imperfect sequences [] total 153 [2022-03-20 19:27:00,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463217507] [2022-03-20 19:27:00,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:27:00,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-03-20 19:27:00,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:00,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-03-20 19:27:00,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11034, Invalid=12222, Unknown=0, NotChecked=0, Total=23256 [2022-03-20 19:27:00,403 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand has 153 states, 153 states have (on average 1.0130718954248366) internal successors, (155), 151 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:27:06,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:27:06,531 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2022-03-20 19:27:06,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-03-20 19:27:06,531 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.0130718954248366) internal successors, (155), 151 states have internal predecessors, (155), 2 states have call successors, (3), 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 159 [2022-03-20 19:27:06,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:27:06,531 INFO L225 Difference]: With dead ends: 166 [2022-03-20 19:27:06,531 INFO L226 Difference]: Without dead ends: 161 [2022-03-20 19:27:06,535 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11466 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=33392, Invalid=58114, Unknown=0, NotChecked=0, Total=91506 [2022-03-20 19:27:06,535 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:27:06,535 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:27:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-20 19:27:06,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-03-20 19:27:06,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0064102564102564) internal successors, (157), 156 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:27:06,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2022-03-20 19:27:06,541 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 159 [2022-03-20 19:27:06,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:27:06,541 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2022-03-20 19:27:06,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.0130718954248366) internal successors, (155), 151 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:27:06,541 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2022-03-20 19:27:06,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-20 19:27:06,541 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:27:06,541 INFO L499 BasicCegarLoop]: trace histogram [148, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:27:06,541 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-03-20 19:27:06,542 INFO L403 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:27:06,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:27:06,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1288998376, now seen corresponding path program 148 times [2022-03-20 19:27:06,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:06,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1350945466] [2022-03-20 19:27:06,623 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:27:06,623 INFO L85 PathProgramCache]: Analyzing trace with hash 127514599, now seen corresponding path program 1 times [2022-03-20 19:27:06,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:27:06,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986008640] [2022-03-20 19:27:06,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:27:06,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:27:06,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:27:06,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:27:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:27:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:27:06,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:27:06,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986008640] [2022-03-20 19:27:06,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986008640] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:27:06,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:27:06,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:27:13,997 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:27:13,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1350945466] [2022-03-20 19:27:13,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1350945466] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:27:13,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:27:13,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [154] imperfect sequences [] total 154 [2022-03-20 19:27:13,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647719937] [2022-03-20 19:27:13,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:27:13,998 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-03-20 19:27:13,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:13,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-03-20 19:27:14,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11183, Invalid=12379, Unknown=0, NotChecked=0, Total=23562 [2022-03-20 19:27:14,000 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand has 154 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 152 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:27:20,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:27:20,561 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2022-03-20 19:27:20,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2022-03-20 19:27:20,562 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 152 states have internal predecessors, (156), 2 states have call successors, (3), 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 160 [2022-03-20 19:27:20,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:27:20,563 INFO L225 Difference]: With dead ends: 167 [2022-03-20 19:27:20,563 INFO L226 Difference]: Without dead ends: 162 [2022-03-20 19:27:20,566 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11618 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=33841, Invalid=58879, Unknown=0, NotChecked=0, Total=92720 [2022-03-20 19:27:20,566 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:27:20,566 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:27:20,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-20 19:27:20,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-03-20 19:27:20,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0063694267515924) internal successors, (158), 157 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:27:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2022-03-20 19:27:20,572 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 160 [2022-03-20 19:27:20,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:27:20,573 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2022-03-20 19:27:20,573 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 152 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:27:20,573 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2022-03-20 19:27:20,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-20 19:27:20,573 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:27:20,573 INFO L499 BasicCegarLoop]: trace histogram [149, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:27:20,573 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-03-20 19:27:20,573 INFO L403 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:27:20,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:27:20,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1268855162, now seen corresponding path program 149 times [2022-03-20 19:27:20,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:20,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [439522399] [2022-03-20 19:27:20,648 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:27:20,649 INFO L85 PathProgramCache]: Analyzing trace with hash 186619943, now seen corresponding path program 1 times [2022-03-20 19:27:20,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:27:20,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763040893] [2022-03-20 19:27:20,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:27:20,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:27:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:27:20,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:27:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:27:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:27:20,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:27:20,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763040893] [2022-03-20 19:27:20,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763040893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:27:20,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:27:20,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:27:27,873 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:27:27,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [439522399] [2022-03-20 19:27:27,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [439522399] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:27:27,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:27:27,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [155] imperfect sequences [] total 155 [2022-03-20 19:27:27,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404858199] [2022-03-20 19:27:27,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:27:27,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-03-20 19:27:27,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:27,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-03-20 19:27:27,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11333, Invalid=12537, Unknown=0, NotChecked=0, Total=23870 [2022-03-20 19:27:27,876 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand has 155 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 153 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:27:36,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:27:36,300 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2022-03-20 19:27:36,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-03-20 19:27:36,301 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 153 states have internal predecessors, (157), 2 states have call successors, (3), 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 161 [2022-03-20 19:27:36,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:27:36,301 INFO L225 Difference]: With dead ends: 168 [2022-03-20 19:27:36,301 INFO L226 Difference]: Without dead ends: 163 [2022-03-20 19:27:36,304 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11771 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=34293, Invalid=59649, Unknown=0, NotChecked=0, Total=93942 [2022-03-20 19:27:36,304 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:27:36,304 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:27:36,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-20 19:27:36,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-03-20 19:27:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0063291139240507) internal successors, (159), 158 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:27:36,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2022-03-20 19:27:36,310 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 161 [2022-03-20 19:27:36,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:27:36,310 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2022-03-20 19:27:36,310 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 153 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:27:36,310 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2022-03-20 19:27:36,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-03-20 19:27:36,310 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:27:36,310 INFO L499 BasicCegarLoop]: trace histogram [150, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:27:36,310 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2022-03-20 19:27:36,310 INFO L403 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:27:36,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:27:36,311 INFO L85 PathProgramCache]: Analyzing trace with hash -644415528, now seen corresponding path program 150 times [2022-03-20 19:27:36,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:36,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1655513463] [2022-03-20 19:27:36,413 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:27:36,413 INFO L85 PathProgramCache]: Analyzing trace with hash 245725287, now seen corresponding path program 1 times [2022-03-20 19:27:36,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:27:36,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821838019] [2022-03-20 19:27:36,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:27:36,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:27:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:27:36,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:27:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:27:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:27:36,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:27:36,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821838019] [2022-03-20 19:27:36,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821838019] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:27:36,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:27:36,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:27:43,226 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:27:43,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1655513463] [2022-03-20 19:27:43,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1655513463] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:27:43,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:27:43,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [156] imperfect sequences [] total 156 [2022-03-20 19:27:43,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804094939] [2022-03-20 19:27:43,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:27:43,227 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-03-20 19:27:43,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:43,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-03-20 19:27:43,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11484, Invalid=12696, Unknown=0, NotChecked=0, Total=24180 [2022-03-20 19:27:43,229 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand has 156 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 154 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:27:51,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:27:51,939 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2022-03-20 19:27:51,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-03-20 19:27:51,939 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 154 states have internal predecessors, (158), 2 states have call successors, (3), 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 162 [2022-03-20 19:27:51,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:27:51,940 INFO L225 Difference]: With dead ends: 169 [2022-03-20 19:27:51,940 INFO L226 Difference]: Without dead ends: 164 [2022-03-20 19:27:51,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11925 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=34748, Invalid=60424, Unknown=0, NotChecked=0, Total=95172 [2022-03-20 19:27:51,944 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:27:51,944 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 19:27:51,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-20 19:27:51,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-03-20 19:27:51,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.0062893081761006) internal successors, (160), 159 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:27:51,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2022-03-20 19:27:51,949 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 162 [2022-03-20 19:27:51,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:27:51,949 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2022-03-20 19:27:51,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 154 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:27:51,949 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2022-03-20 19:27:51,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-20 19:27:51,950 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:27:51,950 INFO L499 BasicCegarLoop]: trace histogram [151, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:27:51,950 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2022-03-20 19:27:51,950 INFO L403 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:27:51,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:27:51,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1533343942, now seen corresponding path program 151 times [2022-03-20 19:27:51,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:51,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1727782896] [2022-03-20 19:27:52,052 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:27:52,052 INFO L85 PathProgramCache]: Analyzing trace with hash 304830631, now seen corresponding path program 1 times [2022-03-20 19:27:52,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:27:52,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199568326] [2022-03-20 19:27:52,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:27:52,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:27:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:27:52,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:27:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:27:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:27:52,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:27:52,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199568326] [2022-03-20 19:27:52,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199568326] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:27:52,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:27:52,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:27:59,509 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:27:59,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1727782896] [2022-03-20 19:27:59,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1727782896] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:27:59,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:27:59,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [157] imperfect sequences [] total 157 [2022-03-20 19:27:59,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285964737] [2022-03-20 19:27:59,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:27:59,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2022-03-20 19:27:59,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:59,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2022-03-20 19:27:59,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11636, Invalid=12856, Unknown=0, NotChecked=0, Total=24492 [2022-03-20 19:27:59,512 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand has 157 states, 157 states have (on average 1.0127388535031847) internal successors, (159), 155 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:28:07,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:28:07,623 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2022-03-20 19:28:07,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-03-20 19:28:07,623 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 1.0127388535031847) internal successors, (159), 155 states have internal predecessors, (159), 2 states have call successors, (3), 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 163 [2022-03-20 19:28:07,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:28:07,624 INFO L225 Difference]: With dead ends: 170 [2022-03-20 19:28:07,624 INFO L226 Difference]: Without dead ends: 165 [2022-03-20 19:28:07,627 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12080 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=35206, Invalid=61204, Unknown=0, NotChecked=0, Total=96410 [2022-03-20 19:28:07,627 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:28:07,628 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 19:28:07,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-20 19:28:07,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-03-20 19:28:07,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.00625) internal successors, (161), 160 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:28:07,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2022-03-20 19:28:07,633 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 163 [2022-03-20 19:28:07,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:28:07,634 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2022-03-20 19:28:07,634 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 157 states have (on average 1.0127388535031847) internal successors, (159), 155 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:28:07,634 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2022-03-20 19:28:07,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-03-20 19:28:07,634 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:28:07,634 INFO L499 BasicCegarLoop]: trace histogram [152, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:28:07,634 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2022-03-20 19:28:07,634 INFO L403 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:28:07,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:28:07,634 INFO L85 PathProgramCache]: Analyzing trace with hash 324410776, now seen corresponding path program 152 times [2022-03-20 19:28:07,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:28:07,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [975215385] [2022-03-20 19:28:07,711 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:28:07,711 INFO L85 PathProgramCache]: Analyzing trace with hash 363935975, now seen corresponding path program 1 times [2022-03-20 19:28:07,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:28:07,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292310832] [2022-03-20 19:28:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:28:07,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:28:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:28:07,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:28:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:28:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:28:07,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:28:07,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292310832] [2022-03-20 19:28:07,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292310832] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:28:07,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:28:07,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:28:14,094 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:28:14,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [975215385] [2022-03-20 19:28:14,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [975215385] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:28:14,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:28:14,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [158] imperfect sequences [] total 158 [2022-03-20 19:28:14,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750608640] [2022-03-20 19:28:14,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:28:14,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-03-20 19:28:14,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:28:14,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-03-20 19:28:14,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11789, Invalid=13017, Unknown=0, NotChecked=0, Total=24806 [2022-03-20 19:28:14,097 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand has 158 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 156 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:28:22,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:28:22,843 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2022-03-20 19:28:22,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-03-20 19:28:22,844 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 156 states have internal predecessors, (160), 2 states have call successors, (3), 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 164 [2022-03-20 19:28:22,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:28:22,844 INFO L225 Difference]: With dead ends: 171 [2022-03-20 19:28:22,844 INFO L226 Difference]: Without dead ends: 166 [2022-03-20 19:28:22,847 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12236 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=35667, Invalid=61989, Unknown=0, NotChecked=0, Total=97656 [2022-03-20 19:28:22,847 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:28:22,848 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 19:28:22,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-03-20 19:28:22,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-03-20 19:28:22,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0062111801242235) internal successors, (162), 161 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:28:22,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2022-03-20 19:28:22,853 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 164 [2022-03-20 19:28:22,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:28:22,853 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2022-03-20 19:28:22,853 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 156 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:28:22,853 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2022-03-20 19:28:22,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-20 19:28:22,854 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:28:22,854 INFO L499 BasicCegarLoop]: trace histogram [153, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:28:22,854 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2022-03-20 19:28:22,854 INFO L403 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:28:22,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:28:22,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1502188294, now seen corresponding path program 153 times [2022-03-20 19:28:22,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:28:22,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1631621790] [2022-03-20 19:28:22,956 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:28:22,957 INFO L85 PathProgramCache]: Analyzing trace with hash 423041319, now seen corresponding path program 1 times [2022-03-20 19:28:22,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:28:22,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436283167] [2022-03-20 19:28:22,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:28:22,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:28:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:28:22,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:28:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:28:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:28:22,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:28:22,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436283167] [2022-03-20 19:28:22,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436283167] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:28:22,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:28:22,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:28:30,198 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:28:30,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1631621790] [2022-03-20 19:28:30,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1631621790] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:28:30,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:28:30,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [159] imperfect sequences [] total 159 [2022-03-20 19:28:30,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476540235] [2022-03-20 19:28:30,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:28:30,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-03-20 19:28:30,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:28:30,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-03-20 19:28:30,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11943, Invalid=13179, Unknown=0, NotChecked=0, Total=25122 [2022-03-20 19:28:30,201 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand has 159 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 157 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:28:37,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:28:37,250 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2022-03-20 19:28:37,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-03-20 19:28:37,250 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 157 states have internal predecessors, (161), 2 states have call successors, (3), 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 165 [2022-03-20 19:28:37,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:28:37,250 INFO L225 Difference]: With dead ends: 172 [2022-03-20 19:28:37,250 INFO L226 Difference]: Without dead ends: 167 [2022-03-20 19:28:37,254 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12393 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=36131, Invalid=62779, Unknown=0, NotChecked=0, Total=98910 [2022-03-20 19:28:37,254 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:28:37,254 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 19:28:37,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-20 19:28:37,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-03-20 19:28:37,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0061728395061729) internal successors, (163), 162 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:28:37,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2022-03-20 19:28:37,259 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 165 [2022-03-20 19:28:37,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:28:37,259 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2022-03-20 19:28:37,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 157 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:28:37,260 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2022-03-20 19:28:37,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-03-20 19:28:37,260 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:28:37,260 INFO L499 BasicCegarLoop]: trace histogram [154, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:28:37,260 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2022-03-20 19:28:37,260 INFO L403 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:28:37,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:28:37,260 INFO L85 PathProgramCache]: Analyzing trace with hash -641414312, now seen corresponding path program 154 times [2022-03-20 19:28:37,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:28:37,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [682053142] [2022-03-20 19:28:37,363 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:28:37,364 INFO L85 PathProgramCache]: Analyzing trace with hash 482146663, now seen corresponding path program 1 times [2022-03-20 19:28:37,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:28:37,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473724132] [2022-03-20 19:28:37,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:28:37,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:28:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:28:37,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:28:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:28:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:28:37,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:28:37,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473724132] [2022-03-20 19:28:37,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473724132] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:28:37,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:28:37,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:28:42,639 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:28:42,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [682053142] [2022-03-20 19:28:42,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [682053142] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:28:42,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:28:42,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [160] imperfect sequences [] total 160 [2022-03-20 19:28:42,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110835857] [2022-03-20 19:28:42,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:28:42,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2022-03-20 19:28:42,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:28:42,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2022-03-20 19:28:42,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12098, Invalid=13342, Unknown=0, NotChecked=0, Total=25440 [2022-03-20 19:28:42,642 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand has 160 states, 160 states have (on average 1.0125) internal successors, (162), 158 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:28:51,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:28:51,246 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2022-03-20 19:28:51,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-03-20 19:28:51,246 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 160 states have (on average 1.0125) internal successors, (162), 158 states have internal predecessors, (162), 2 states have call successors, (3), 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 166 [2022-03-20 19:28:51,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:28:51,246 INFO L225 Difference]: With dead ends: 173 [2022-03-20 19:28:51,246 INFO L226 Difference]: Without dead ends: 168 [2022-03-20 19:28:51,250 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12551 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=36598, Invalid=63574, Unknown=0, NotChecked=0, Total=100172 [2022-03-20 19:28:51,250 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:28:51,250 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 19:28:51,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-03-20 19:28:51,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-03-20 19:28:51,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.0061349693251533) internal successors, (164), 163 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:28:51,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2022-03-20 19:28:51,255 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 166 [2022-03-20 19:28:51,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:28:51,255 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2022-03-20 19:28:51,256 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 160 states, 160 states have (on average 1.0125) internal successors, (162), 158 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:28:51,256 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2022-03-20 19:28:51,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-20 19:28:51,256 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:28:51,256 INFO L499 BasicCegarLoop]: trace histogram [155, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:28:51,256 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2022-03-20 19:28:51,256 INFO L403 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:28:51,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:28:51,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1626381638, now seen corresponding path program 155 times [2022-03-20 19:28:51,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:28:51,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1491927928] [2022-03-20 19:28:51,382 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:28:51,382 INFO L85 PathProgramCache]: Analyzing trace with hash 541252007, now seen corresponding path program 1 times [2022-03-20 19:28:51,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:28:51,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700089709] [2022-03-20 19:28:51,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:28:51,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:28:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:28:51,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:28:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:28:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:28:51,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:28:51,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700089709] [2022-03-20 19:28:51,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700089709] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:28:51,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:28:51,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:28:56,535 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:28:56,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1491927928] [2022-03-20 19:28:56,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1491927928] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:28:56,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:28:56,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [161] imperfect sequences [] total 161 [2022-03-20 19:28:56,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693844278] [2022-03-20 19:28:56,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:28:56,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-03-20 19:28:56,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:28:56,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-03-20 19:28:56,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12254, Invalid=13506, Unknown=0, NotChecked=0, Total=25760 [2022-03-20 19:28:56,538 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand has 161 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 159 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:29:03,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:29:03,149 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2022-03-20 19:29:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-03-20 19:29:03,149 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 159 states have internal predecessors, (163), 2 states have call successors, (3), 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 167 [2022-03-20 19:29:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:29:03,149 INFO L225 Difference]: With dead ends: 174 [2022-03-20 19:29:03,150 INFO L226 Difference]: Without dead ends: 169 [2022-03-20 19:29:03,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12710 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=37068, Invalid=64374, Unknown=0, NotChecked=0, Total=101442 [2022-03-20 19:29:03,153 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:29:03,153 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 19:29:03,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-20 19:29:03,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-03-20 19:29:03,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0060975609756098) internal successors, (165), 164 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:29:03,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2022-03-20 19:29:03,159 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 167 [2022-03-20 19:29:03,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:29:03,159 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2022-03-20 19:29:03,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 159 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:29:03,159 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2022-03-20 19:29:03,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-03-20 19:29:03,159 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:29:03,159 INFO L499 BasicCegarLoop]: trace histogram [156, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:29:03,159 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2022-03-20 19:29:03,159 INFO L403 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:29:03,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:29:03,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1086387944, now seen corresponding path program 156 times [2022-03-20 19:29:03,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:29:03,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1251605546] [2022-03-20 19:29:03,272 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:29:03,273 INFO L85 PathProgramCache]: Analyzing trace with hash 600357351, now seen corresponding path program 1 times [2022-03-20 19:29:03,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:29:03,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082475446] [2022-03-20 19:29:03,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:29:03,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:29:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:29:03,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:29:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:29:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:29:03,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:29:03,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082475446] [2022-03-20 19:29:03,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082475446] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:29:03,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:29:03,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:29:09,291 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:29:09,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1251605546] [2022-03-20 19:29:09,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1251605546] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:29:09,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:29:09,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [162] imperfect sequences [] total 162 [2022-03-20 19:29:09,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788460920] [2022-03-20 19:29:09,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:29:09,292 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-03-20 19:29:09,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:29:09,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-03-20 19:29:09,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12411, Invalid=13671, Unknown=0, NotChecked=0, Total=26082 [2022-03-20 19:29:09,294 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand has 162 states, 162 states have (on average 1.0123456790123457) internal successors, (164), 160 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:29:16,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:29:16,529 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2022-03-20 19:29:16,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-03-20 19:29:16,529 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 1.0123456790123457) internal successors, (164), 160 states have internal predecessors, (164), 2 states have call successors, (3), 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 168 [2022-03-20 19:29:16,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:29:16,530 INFO L225 Difference]: With dead ends: 175 [2022-03-20 19:29:16,530 INFO L226 Difference]: Without dead ends: 170 [2022-03-20 19:29:16,533 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12870 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=37541, Invalid=65179, Unknown=0, NotChecked=0, Total=102720 [2022-03-20 19:29:16,534 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:29:16,534 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 19:29:16,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-03-20 19:29:16,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-03-20 19:29:16,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.006060606060606) internal successors, (166), 165 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:29:16,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2022-03-20 19:29:16,539 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 168 [2022-03-20 19:29:16,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:29:16,539 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2022-03-20 19:29:16,539 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 1.0123456790123457) internal successors, (164), 160 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:29:16,539 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2022-03-20 19:29:16,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-20 19:29:16,540 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:29:16,540 INFO L499 BasicCegarLoop]: trace histogram [157, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:29:16,540 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2022-03-20 19:29:16,540 INFO L403 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:29:16,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:29:16,540 INFO L85 PathProgramCache]: Analyzing trace with hash 717100934, now seen corresponding path program 157 times [2022-03-20 19:29:16,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:29:16,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [226376339] [2022-03-20 19:29:16,674 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:29:16,674 INFO L85 PathProgramCache]: Analyzing trace with hash 659462695, now seen corresponding path program 1 times [2022-03-20 19:29:16,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:29:16,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851028603] [2022-03-20 19:29:16,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:29:16,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:29:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:29:16,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:29:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:29:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:29:16,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:29:16,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851028603] [2022-03-20 19:29:16,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851028603] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:29:16,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:29:16,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:29:22,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:29:22,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [226376339] [2022-03-20 19:29:22,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [226376339] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:29:22,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:29:22,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [163] imperfect sequences [] total 163 [2022-03-20 19:29:22,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479880442] [2022-03-20 19:29:22,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:29:22,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2022-03-20 19:29:22,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:29:22,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2022-03-20 19:29:22,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12569, Invalid=13837, Unknown=0, NotChecked=0, Total=26406 [2022-03-20 19:29:22,554 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand has 163 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 161 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:29:29,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:29:29,523 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2022-03-20 19:29:29,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-03-20 19:29:29,523 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 161 states have internal predecessors, (165), 2 states have call successors, (3), 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 169 [2022-03-20 19:29:29,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:29:29,524 INFO L225 Difference]: With dead ends: 176 [2022-03-20 19:29:29,524 INFO L226 Difference]: Without dead ends: 171 [2022-03-20 19:29:29,528 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13031 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=38017, Invalid=65989, Unknown=0, NotChecked=0, Total=104006 [2022-03-20 19:29:29,528 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:29:29,528 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 19:29:29,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-20 19:29:29,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-03-20 19:29:29,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0060240963855422) internal successors, (167), 166 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:29:29,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2022-03-20 19:29:29,546 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 169 [2022-03-20 19:29:29,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:29:29,546 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2022-03-20 19:29:29,547 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 161 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:29:29,547 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2022-03-20 19:29:29,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-03-20 19:29:29,547 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:29:29,547 INFO L499 BasicCegarLoop]: trace histogram [158, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:29:29,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2022-03-20 19:29:29,547 INFO L403 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:29:29,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:29:29,547 INFO L85 PathProgramCache]: Analyzing trace with hash 790681304, now seen corresponding path program 158 times [2022-03-20 19:29:29,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:29:29,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [46047504] [2022-03-20 19:29:29,655 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:29:29,655 INFO L85 PathProgramCache]: Analyzing trace with hash 718568039, now seen corresponding path program 1 times [2022-03-20 19:29:29,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:29:29,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11892890] [2022-03-20 19:29:29,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:29:29,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:29:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:29:29,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:29:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:29:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:29:29,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:29:29,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11892890] [2022-03-20 19:29:29,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11892890] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:29:29,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:29:29,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:29:38,463 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:29:38,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [46047504] [2022-03-20 19:29:38,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [46047504] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:29:38,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:29:38,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [164] imperfect sequences [] total 164 [2022-03-20 19:29:38,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813824428] [2022-03-20 19:29:38,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:29:38,464 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-03-20 19:29:38,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:29:38,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-03-20 19:29:38,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12728, Invalid=14004, Unknown=0, NotChecked=0, Total=26732 [2022-03-20 19:29:38,466 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand has 164 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 162 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:29:47,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:29:47,525 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2022-03-20 19:29:47,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-03-20 19:29:47,525 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 162 states have internal predecessors, (166), 2 states have call successors, (3), 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 170 [2022-03-20 19:29:47,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:29:47,526 INFO L225 Difference]: With dead ends: 177 [2022-03-20 19:29:47,526 INFO L226 Difference]: Without dead ends: 172 [2022-03-20 19:29:47,529 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13193 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=38496, Invalid=66804, Unknown=0, NotChecked=0, Total=105300 [2022-03-20 19:29:47,530 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:29:47,530 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:29:47,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-20 19:29:47,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-03-20 19:29:47,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0059880239520957) internal successors, (168), 167 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:29:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2022-03-20 19:29:47,536 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 170 [2022-03-20 19:29:47,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:29:47,536 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2022-03-20 19:29:47,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 162 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:29:47,536 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2022-03-20 19:29:47,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-03-20 19:29:47,536 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:29:47,537 INFO L499 BasicCegarLoop]: trace histogram [159, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:29:47,537 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2022-03-20 19:29:47,537 INFO L403 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:29:47,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:29:47,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1223294522, now seen corresponding path program 159 times [2022-03-20 19:29:47,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:29:47,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2056077938] [2022-03-20 19:29:47,609 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:29:47,609 INFO L85 PathProgramCache]: Analyzing trace with hash 777673383, now seen corresponding path program 1 times [2022-03-20 19:29:47,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:29:47,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009861123] [2022-03-20 19:29:47,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:29:47,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:29:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:29:47,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:29:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:29:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:29:47,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:29:47,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009861123] [2022-03-20 19:29:47,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009861123] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:29:47,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:29:47,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:29:53,260 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:29:53,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2056077938] [2022-03-20 19:29:53,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2056077938] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:29:53,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:29:53,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [165] imperfect sequences [] total 165 [2022-03-20 19:29:53,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879502325] [2022-03-20 19:29:53,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:29:53,261 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-03-20 19:29:53,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:29:53,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-03-20 19:29:53,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12888, Invalid=14172, Unknown=0, NotChecked=0, Total=27060 [2022-03-20 19:29:53,263 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand has 165 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 163 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:30:02,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:30:02,656 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2022-03-20 19:30:02,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-03-20 19:30:02,657 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 163 states have internal predecessors, (167), 2 states have call successors, (3), 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 171 [2022-03-20 19:30:02,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:30:02,657 INFO L225 Difference]: With dead ends: 178 [2022-03-20 19:30:02,657 INFO L226 Difference]: Without dead ends: 173 [2022-03-20 19:30:02,661 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13356 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=38978, Invalid=67624, Unknown=0, NotChecked=0, Total=106602 [2022-03-20 19:30:02,661 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:30:02,662 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 19:30:02,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-20 19:30:02,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-03-20 19:30:02,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.005952380952381) internal successors, (169), 168 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:30:02,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2022-03-20 19:30:02,668 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 171 [2022-03-20 19:30:02,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:30:02,668 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2022-03-20 19:30:02,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 163 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:30:02,668 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2022-03-20 19:30:02,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-03-20 19:30:02,668 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:30:02,668 INFO L499 BasicCegarLoop]: trace histogram [160, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:30:02,668 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2022-03-20 19:30:02,669 INFO L403 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:30:02,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:30:02,669 INFO L85 PathProgramCache]: Analyzing trace with hash 767964312, now seen corresponding path program 160 times [2022-03-20 19:30:02,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:30:02,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2042861599] [2022-03-20 19:30:02,794 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:30:02,794 INFO L85 PathProgramCache]: Analyzing trace with hash 836778727, now seen corresponding path program 1 times [2022-03-20 19:30:02,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:30:02,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493787715] [2022-03-20 19:30:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:30:02,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:30:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:30:02,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:30:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:30:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:30:02,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:30:02,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493787715] [2022-03-20 19:30:02,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493787715] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:30:02,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:30:02,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:30:10,622 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:30:10,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2042861599] [2022-03-20 19:30:10,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2042861599] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:30:10,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:30:10,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [166] imperfect sequences [] total 166 [2022-03-20 19:30:10,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958767255] [2022-03-20 19:30:10,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:30:10,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2022-03-20 19:30:10,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:30:10,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2022-03-20 19:30:10,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13049, Invalid=14341, Unknown=0, NotChecked=0, Total=27390 [2022-03-20 19:30:10,626 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand has 166 states, 166 states have (on average 1.0120481927710843) internal successors, (168), 164 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)